Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Go Back   Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum > General > Tech Talk

Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars


Reply
 
Thread Tools Display Modes
Old 08-01-2016, 05:46 PM   #541
justinbyrant
Zilvia Member
 
Join Date: May 2011
Location: eugene
Age: 29
Posts: 229
Trader Rating: (0)
justinbyrant is an unknown quantity at this point
Feedback Score: 0 reviews
this thread is amazing, one of the better ones out there for sure, just a few questions

#1 for all this welding work, and running fittings and lines, and cutting holes in your downpipes and all this extra work would it not just be easier to modify the valve cover internally and improve the baffling design to rival that of the s13.4 valve covers?

#2 if your gonna go through all this work would it not make more sense to run the side valve cover vent and the top valve cover vent to a catch can with a baffled vacuum source and with a drain to the block vent with an inline filter that way your still seeing vacuum, still pulling air through the system and still collecting oil but instead of possibly filling a catch can or having the blowby oil from the side vent draining directly into the pan via the block vent its being filtered then drained?

also
Quote:
Originally Posted by ixfxi View Post
as opposed to old VWs? its all junk!

its the one car make I will absolutely never, ever own. VW = junk cars
while I agree they do a lot of stupid shit they aren't all junk, I owned a old first generation jetta with 824,000 miles on it, trans had been replaced multiple times but the engine was still original, had a litteral book of repair paperwork that dated from 10,000 miles to 720,000 miles I had never seen anything like it in my life
justinbyrant is offline   Reply With Quote
Sponsored Links
Old 08-16-2016, 09:04 PM   #542
rvlliein
 
Join Date: Aug 2016
Location: yes
Age: 33
Posts: 4
Trader Rating: (0)
rvlliein is an unknown quantity at this point
Feedback Score: 0 reviews
Sounds awesome! I have been debating a solution to this myself. Catch can here? In between there?
rvlliein is offline   Reply With Quote
Old 08-19-2016, 02:46 AM   #543
slider2828
Premium Member
 
slider2828's Avatar
 
Join Date: Oct 2004
Location: San Francisco, CA
Posts: 5,824
Trader Rating: (13)
slider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfection
Feedback Score: 13 reviews
Responding in line

Quote:
Originally Posted by justinbyrant View Post
this thread is amazing, one of the better ones out there for sure, just a few questions

#1 for all this welding work, and running fittings and lines, and cutting holes in your downpipes and all this extra work would it not just be easier to modify the valve cover internally and improve the baffling design to rival that of the s13.4 valve covers?

The only modification is to the valve cover actually. Its just drilling some holes and attaching some fittings and removed the T. There is no modification to the downpipe at all. There isn't a adequate space to baffle in the S13 vc, that is why the S14 has a hump...

#2 if your gonna go through all this work would it not make more sense to run the side valve cover vent and the top valve cover vent to a catch can with a baffled vacuum source and with a drain to the block vent with an inline filter that way your still seeing vacuum, still pulling air through the system and still collecting oil but instead of possibly filling a catch can or having the blowby oil from the side vent draining directly into the pan via the block vent its being filtered then drained?

That just seems more complicated to me.... Now you have 3 tubes running to the catch... meh..... Personally I think that would reduce the effectiveness of the can itself. The original design is enhancing the OE design of the system. So oil pulled into the head drains back down into the can through the head. Whatever is left over if anything is caught in the can. This way the design technically has 2 air oil separators. 1 is the head and the other is the can. What you are suggesting is actually eliminating 1 of those a/o separator for an oil drain solution.....

Like said this is a track tested setup... So... yeah....

also


while I agree they do a lot of stupid shit they aren't all junk, I owned a old first generation jetta with 824,000 miles on it, trans had been replaced multiple times but the engine was still original, had a litteral book of repair paperwork that dated from 10,000 miles to 720,000 miles I had never seen anything like it in my life
__________________
Turn and Burn!
slider2828 is offline   Reply With Quote
Old 08-20-2016, 08:45 PM   #544
lsineon
 
Join Date: Aug 2016
Location: yes
Age: 32
Posts: 4
Trader Rating: (0)
lsineon is an unknown quantity at this point
Feedback Score: 0 reviews
Sounds awesome! I have been debating a solution to this myself. Catch can here? In between there? I dunno.
lsineon is offline   Reply With Quote
Old 01-11-2017, 03:10 PM   #545
PoorMans180SX
Zilvia.net Advertiser
 
PoorMans180SX's Avatar
 
Join Date: Nov 2005
Location: Michigan
Age: 33
Posts: 5,430
Trader Rating: (16)
PoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfection
Feedback Score: 16 reviews
Send a message via AIM to PoorMans180SX
Just to further the discussion we have going here, this was recommended by a very successful mechanical engineer with quite a large list of accomplishments. Now it's for a V engine but it applies equally to an inline. I was opposed to it at first, but it does make sense. Evacuation under all conditions.


__________________
Build: http://zilvia.net/f/showthread.php?t=643065

Friends don't let friends buy knock-offs.
PoorMans180SX is offline   Reply With Quote
Old 01-12-2017, 01:37 AM   #546
slider2828
Premium Member
 
slider2828's Avatar
 
Join Date: Oct 2004
Location: San Francisco, CA
Posts: 5,824
Trader Rating: (13)
slider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfection
Feedback Score: 13 reviews
Yeah I agree in theory this would totally work. My issue is that there would be possible multiple point of failure if we include it in the vacuum system. I do like it a lot sort of like how our stock pcv system? What do you think about even a belt or electrical vacuum pump? That might be easier?
__________________
Turn and Burn!
slider2828 is offline   Reply With Quote
Old 01-25-2017, 02:44 PM   #547
PoorMans180SX
Zilvia.net Advertiser
 
PoorMans180SX's Avatar
 
Join Date: Nov 2005
Location: Michigan
Age: 33
Posts: 5,430
Trader Rating: (16)
PoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfection
Feedback Score: 16 reviews
Send a message via AIM to PoorMans180SX
Quote:
Originally Posted by slider2828 View Post
Yeah I agree in theory this would totally work. My issue is that there would be possible multiple point of failure if we include it in the vacuum system. I do like it a lot sort of like how our stock pcv system? What do you think about even a belt or electrical vacuum pump? That might be easier?
What do you mean by failure? The check valves getting stuck? It definitely resembles the stock system, but with a proper catch can, and an open filter to intake fresh air, not just air being forced from the crankcase. You could route the intake pipe one to the exhaust instead.

A vacuum pump is definitely the all-in-one solution, but I would imagine you'd want to vent it to a catch can regardless. Probably a can with a drain back as well unless you have some really good baffling in your valvecover. Not the cheapest route, but by far the most effective this side of a drysump.

__________________
Build: http://zilvia.net/f/showthread.php?t=643065

Friends don't let friends buy knock-offs.
PoorMans180SX is offline   Reply With Quote
Old 01-25-2017, 11:36 PM   #548
slider2828
Premium Member
 
slider2828's Avatar
 
Join Date: Oct 2004
Location: San Francisco, CA
Posts: 5,824
Trader Rating: (13)
slider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfection
Feedback Score: 13 reviews
Failure would be like 3 check valves and 6 pieces of hoses... Vac pump would be end all basically.
__________________
Turn and Burn!
slider2828 is offline   Reply With Quote
Old 04-18-2017, 06:06 PM   #549
hanzbrady
Zilvia FREAK!
 
hanzbrady's Avatar
 
Join Date: Apr 2015
Location: Floriduh
Posts: 1,168
Trader Rating: (4)
hanzbrady has a spectacular aura abouthanzbrady has a spectacular aura abouthanzbrady has a spectacular aura abouthanzbrady has a spectacular aura abouthanzbrady has a spectacular aura abouthanzbrady has a spectacular aura about
Feedback Score: 4 reviews
Hey guys,

I have an extra S13 valve cover, is anyone interested in getting one made?

__________________
[email protected]
hanzbrady is offline   Reply With Quote
Old 05-07-2019, 01:37 AM   #550
speedgod^s13
Post Whore!
 
Join Date: Nov 2004
Location: Honolulu, Hawaii
Age: 41
Posts: 3,159
Trader Rating: (27)
speedgod^s13 has a reputation beyond reputespeedgod^s13 has a reputation beyond reputespeedgod^s13 has a reputation beyond reputespeedgod^s13 has a reputation beyond reputespeedgod^s13 has a reputation beyond reputespeedgod^s13 has a reputation beyond reputespeedgod^s13 has a reputation beyond reputespeedgod^s13 has a reputation beyond reputespeedgod^s13 has a reputation beyond reputespeedgod^s13 has a reputation beyond reputespeedgod^s13 has a reputation beyond repute
Feedback Score: 27 reviews
Send a message via AIM to speedgod^s13
Just seen this posted on Facebook. Thoughts? https://www.facebook.com/groups/2727...6855802402872/
speedgod^s13 is online now   Reply With Quote
Old 05-08-2019, 12:20 AM   #551
slider2828
Premium Member
 
slider2828's Avatar
 
Join Date: Oct 2004
Location: San Francisco, CA
Posts: 5,824
Trader Rating: (13)
slider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfection
Feedback Score: 13 reviews
I don't belong to that group, can you maybe take a screen shot?
__________________
Turn and Burn!
slider2828 is offline   Reply With Quote
Old 05-08-2019, 02:09 AM   #552
speedgod^s13
Post Whore!
 
Join Date: Nov 2004
Location: Honolulu, Hawaii
Age: 41
Posts: 3,159
Trader Rating: (27)
speedgod^s13 has a reputation beyond reputespeedgod^s13 has a reputation beyond reputespeedgod^s13 has a reputation beyond reputespeedgod^s13 has a reputation beyond reputespeedgod^s13 has a reputation beyond reputespeedgod^s13 has a reputation beyond reputespeedgod^s13 has a reputation beyond reputespeedgod^s13 has a reputation beyond reputespeedgod^s13 has a reputation beyond reputespeedgod^s13 has a reputation beyond reputespeedgod^s13 has a reputation beyond repute
Feedback Score: 27 reviews
Send a message via AIM to speedgod^s13
Quote:
Originally Posted by slider2828 View Post
I don't belong to that group, can you maybe take a screen shot?
https://m.facebook.com/Level7Performance
speedgod^s13 is online now   Reply With Quote
Old 05-08-2019, 05:09 AM   #553
Kingtal0n
Post Whore!
 
Kingtal0n's Avatar
 
Join Date: Jul 2005
Location: South Florida
Age: 38
Posts: 4,646
Trader Rating: (17)
Kingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond repute
Feedback Score: 17 reviews
Send a message via AIM to Kingtal0n
This one is for a V8 using the OEM sr20det pcv flow:


1. if possible, use only 1 check valve. "More checkvalves is worse, not better" I say that from common sense. Always use the minimum equipment to minimize failure of equipment.
2. Select hose diameter carefully, adjust with no additional containers. Less crankcase volume overall means higher response to vacuum, more effectively/effectiveness of vacuum signal.
3. Select orifice diameter "on the high side" as opposed to the entire hose. Account for potential flow and sludge with hose diameter if necessary. This depends on power and maintenance interval.


making diagrams:
try to keep flow all the same direction
make sure its obvious which side of the air valves you are on, and where it is

Last edited by Kingtal0n; 05-08-2019 at 06:43 AM..
Kingtal0n is offline   Reply With Quote
Old 01-11-2020, 09:09 AM   #554
marcoch
BANNED
 
Join Date: Jan 2020
Location: FRANCE
Age: 25
Posts: 2
Trader Rating: (0)
marcoch is an unknown quantity at this point
Feedback Score: 0 reviews
Ok Fine... Most SR slanted valve auto clicker word unscrambler jumble solver covers can do this no problem, why? Because their baffling in the valve cover is better than or flat tops and their valve covers ARE that little black air oil separator cans if you look up slant top pics... So what do you do?

Last edited by marcoch; 01-12-2020 at 11:03 AM..
marcoch is offline   Reply With Quote
Old 01-16-2020, 02:20 PM   #555
slider2828
Premium Member
 
slider2828's Avatar
 
Join Date: Oct 2004
Location: San Francisco, CA
Posts: 5,824
Trader Rating: (13)
slider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfection
Feedback Score: 13 reviews
Quote:
Originally Posted by speedgod^s13 View Post
Thats pretty cool. -10AN too much but yeah nice!

__________________
Turn and Burn!
slider2828 is offline   Reply With Quote
Old 01-16-2020, 02:24 PM   #556
slider2828
Premium Member
 
slider2828's Avatar
 
Join Date: Oct 2004
Location: San Francisco, CA
Posts: 5,824
Trader Rating: (13)
slider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfection
Feedback Score: 13 reviews
Quote:
Originally Posted by marcoch View Post
Ok Fine... Most SR slanted valve auto clicker word unscrambler jumble solver covers can do this no problem, why? Because their baffling in the valve cover is better than or flat tops and their valve covers ARE that little black air oil separator cans if you look up slant top pics... So what do you do?
Can't put that air oil separator if you have an after market exh manifold..... and that little black box can get overwhelmed cause drain back sucks. Then literally will come out of the other end of the T. You can probably retain the silver reducer in the pipe between T and black box, but its an antiquated system
__________________
Turn and Burn!
slider2828 is offline   Reply With Quote
Old 01-17-2020, 08:56 AM   #557
nick_d_240sx
Leaky Injector
 
nick_d_240sx's Avatar
 
Join Date: Dec 2017
Location: Oregon
Age: 39
Posts: 64
Trader Rating: (0)
nick_d_240sx is an unknown quantity at this point
Feedback Score: 0 reviews
In my attempt to better understand the factory PCV system here are a few diagrams from the Japanese FSM for the SR20DET showing the pipes connected to the intake related to the PCV system.

Factory SR20DET Intake Diagram


PCV and I'm not really sure where that lower pipe goes? Lower intake manifold? EDIT: Looks like it goes to the AAC valve


Split air pipe to intake manifold and lower pipe to lower intake manifold? EDIT: Looks like it goes to the AAC valve


I just thought this looked funny.


Another view


Picture


Ever since converting to Speed Density I have a catch can vented to atmosphere and have had a fucked up rich idle issue which led me to this thread. I am going to re-plumb the hose from the Tee on the valve cover to the catch can and back to the intake before the turbo. I will edit this post with results.

In my opinion -AN isn't really necessary for anything in the system. Simple barbs/hose/hose clamps are adequate. -AN only needed for pressurized fluid. EDIT: Ha!

I find it hard to believe that a working PCV system vs Venting to atmosphere would actually net HP gains, but I think it actually will/does. Something so simple but necessary for applying vacuum to the crankcase.

5-13-20 EDIT:
I hooked up my catch can to a nipple on the intake pre-turbo and it didn't really seem to do anything noticeable. However, while trying to determine my idle issue I removed the intake manifold and noticed a pool of oil in my intake manifold. This was probably because I didn't have the vacuum source hooked up causing pressure to build up and push oil out the PCV into the IM. I have not yet checked the PCV valve. Idle problem may be related to IACV, but it looked and tested fine.
__________________
1990 240SX SR20DET GTX2863R

Last edited by nick_d_240sx; 05-13-2020 at 10:43 AM..
nick_d_240sx is offline   Reply With Quote
Old 01-17-2020, 11:29 PM   #558
slider2828
Premium Member
 
slider2828's Avatar
 
Join Date: Oct 2004
Location: San Francisco, CA
Posts: 5,824
Trader Rating: (13)
slider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfection
Feedback Score: 13 reviews
The pipe between the black canister, has a silver reducer in it. Without it you going to suck up a lot of oil on the track..... hence pipe through the valve cover.....

Also you actually DO need AN fittings and a push lock, cause when pulling 20psi, it WILL collapse a shitty heater hose.... Just FYI... The pipes from factory are hard for a reason.... Hope that helps....

I am also running a MAP sensor via a PowerFC DJetro, I wonder if your injector latency is wrong or your ecu can't control super large injectors.

I recently also been reading more into side feed vs. top feed and top feed is a lot better at idle from what people are saying.
__________________
Turn and Burn!
slider2828 is offline   Reply With Quote
Old 01-19-2020, 11:00 AM   #559
Kingtal0n
Post Whore!
 
Kingtal0n's Avatar
 
Join Date: Jul 2005
Location: South Florida
Age: 38
Posts: 4,646
Trader Rating: (17)
Kingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond repute
Feedback Score: 17 reviews
Send a message via AIM to Kingtal0n
Air is a fluid and we are definitely under pressure on the surface of Earth


perform pressure test to find all leaks of crankcase pcv system



replicate OEM pcv situation in wet sump application... or else
Kingtal0n is offline   Reply With Quote
Old 01-19-2020, 12:22 PM   #560
mechanicalmoron
Zilvia FREAK!
 
Join Date: Jul 2013
Location: tx
Posts: 1,072
Trader Rating: (0)
mechanicalmoron is just really nicemechanicalmoron is just really nicemechanicalmoron is just really nicemechanicalmoron is just really nicemechanicalmoron is just really nicemechanicalmoron is just really nicemechanicalmoron is just really nicemechanicalmoron is just really nice
Feedback Score: 0 reviews
Quote:
Originally Posted by nick_d_240sx View Post
In my attempt to better understand the factory PCV system here are a few diagrams from the Japanese FSM for the SR20DET showing the pipes connected to the intake related to the PCV system.

Factory SR20DET Intake Diagram


PCV and I'm not really sure where that lower pipe goes? Lower intake manifold? EDIT: Looks like it goes to the AAC valve


Split air pipe to intake manifold and lower pipe to lower intake manifold? EDIT: Looks like it goes to the AAC valve


I just thought this looked funny.


Another view


Picture


Ever since converting to Speed Density I have a catch can vented to atmosphere and have had a fucked up rich idle issue which led me to this thread. I am going to re-plumb the hose from the Tee on the valve cover to the catch can and back to the intake before the turbo. I will edit this post with results.

In my opinion -AN isn't really necessary for anything in the system. Simple barbs/hose/hose clamps are adequate. -AN only needed for pressurized fluid.

I find it hard to believe that a working PCV system vs Venting to atmosphere would actually net HP gains, but I think it actually will/does. Something so simple but necessary for applying vacuum to the crankcase.
A broken pcv mostly makes your car leak, smoke, crud up and go to shit internally, which will sure fuck your net HP in the long run.

The gains here are doubtful - for one thing, running a huge line to pull huge vacuum actually takes power, that's energy spent one way or another, coming out of the same total volume of energy in your gas tank.

Vacuum's good in the motor, but there's going to be diminishing returns past a mild point, which is why production cars don't come with hoovered out PCV systems. Cars with excessively positive OR negative crankcase pressure develop all sorts of weird problems, like seals flipping and wearing, or other solenoids or systems not doing what you'd think because they can never bleed vacuum as fast as they need, or whatever.
mechanicalmoron is offline   Reply With Quote
Old 01-19-2020, 05:00 PM   #561
Kingtal0n
Post Whore!
 
Kingtal0n's Avatar
 
Join Date: Jul 2005
Location: South Florida
Age: 38
Posts: 4,646
Trader Rating: (17)
Kingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond reputeKingtal0n has a reputation beyond repute
Feedback Score: 17 reviews
Send a message via AIM to Kingtal0n
Quote:
Originally Posted by mechanicalmoron View Post
Vacuum's good in the motor, but there's going to be diminishing returns past a mild point, which is why production cars don't come with hoovered out PCV systems. Cars with excessively positive OR negative crankcase pressure develop all sorts of weird problems, like seals flipping and wearing, or other solenoids or systems not doing what you'd think because they can never bleed vacuum as fast as they need, or whatever.
production engine crankcase vacuum range in wet sump applications is 1 to 3" of Hg. 1" of Hg is about 3300Pa or 3kpa, so a general guideline for WOT production engine crankcase pcv is approx 10KPA below atmospheric pressure. (103KPA - 10KPA = 93KPA crankcase pressure, absolute)

It varies depending on the engine's current state and pcv orifice diameter but somewhere within that range is acceptable to majority of production engines...

Performance engine vacuum range is actually the same, 1 to 3" of Hg in a wet sump application. So your statement about excessive vacuum is accurate whether we are discussing production engines or high performance engines with oil in the pan.

The difference you neglected to mention however is in the flow rate of each situation. A production engine which has been turned up (say, a sr20det turned up to 400whp or a 4.8L truck engine turned up to 600rwhp) to around double of the intended output is going to require around double the pcv flow rate to maintain the same vacuum (roughly 10KPA) given all else equal, due to the roughly double pressure integral experienced by the piston area.

This is a classic example of pressure vs flow, just like in oil systems we are familiar with. What it really means is that when attempting to hit production pcv standards (10KPA pressure drop ranges) in highly modified (often production) engines, the requirements for adequate pcv performance change as much as the power does, you can't always re-use the factory pcv components and expect to achieve a factory level of PCV on highly modded engines. The orifices likely need to be larger and the filter situation needs to be addressed, since the air filter essentially drives WOT pcv action.
In other words, crankcase pressure should be discretely measured, to ensure that phenomenal range of 1 to 3" Hg is being hit at WOT and cruise.
If that can't be done, then at least adequate paper filtration and correct pcv orientation should be used to give it a fighting chance at least.
Kingtal0n is offline   Reply With Quote
Old 02-09-2020, 12:17 PM   #562
Joes13Silvia
 
Join Date: Jul 2019
Location: Ohio
Posts: 7
Trader Rating: (0)
Joes13Silvia is an unknown quantity at this point
Feedback Score: 0 reviews
Quote:
Originally Posted by slider2828 View Post
Thats pretty cool. -10AN too much but yeah nice!


This is a buddy of mines product, he's interested in hearing feed back on how people like it, it was developed around a boosted honda motor, but he makes them for all the japanese 4 cyl motors. So far he says the nissan guys have been slow to adopt. He's an engineer by trade.
Joes13Silvia is offline   Reply With Quote
Old 02-09-2020, 04:03 PM   #563
slider2828
Premium Member
 
slider2828's Avatar
 
Join Date: Oct 2004
Location: San Francisco, CA
Posts: 5,824
Trader Rating: (13)
slider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfectionslider2828 is close to perfection
Feedback Score: 13 reviews
Quote:
Originally Posted by Joes13Silvia View Post
This is a buddy of mines product, he's interested in hearing feed back on how people like it, it was developed around a boosted honda motor, but he makes them for all the japanese 4 cyl motors. So far he says the nissan guys have been slow to adopt. He's an engineer by trade.
I think its a cool product, but I mean truthfully it is very expensive for what it is... We already have a pretty good vac system and routing.... Not sure "HOW" much it will help since turbos and lines probably already evac enough already....
__________________
Turn and Burn!
slider2828 is offline   Reply With Quote
Old 02-09-2020, 05:53 PM   #564
S14rebuild
BANNED
 
Join Date: May 2019
Location: Florida-FAIL
Posts: 2,497
Trader Rating: (8)
S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild
Feedback Score: 8 reviews
Quote:
Originally Posted by Joes13Silvia View Post
This is a buddy of mines product, he's interested in hearing feed back on how people like it, it was developed around a boosted honda motor, but he makes them for all the japanese 4 cyl motors. So far he says the nissan guys have been slow to adopt. He's an engineer by trade.
This is a "kool" product..but for $120 anyone could easyly have an fittings welded to their valve cover... just cant see how this installed on a nissan motor would look good and do better then other catch can setups
S14rebuild is offline   Reply With Quote
Old 02-10-2020, 08:12 AM   #565
TheRealSy90
Premium Member
 
TheRealSy90's Avatar
 
Join Date: Mar 2009
Location: Maricopa, AZ
Age: 30
Posts: 7,679
Trader Rating: (10)
TheRealSy90 has a brilliant futureTheRealSy90 has a brilliant futureTheRealSy90 has a brilliant futureTheRealSy90 has a brilliant futureTheRealSy90 has a brilliant futureTheRealSy90 has a brilliant futureTheRealSy90 has a brilliant futureTheRealSy90 has a brilliant futureTheRealSy90 has a brilliant futureTheRealSy90 has a brilliant futureTheRealSy90 has a brilliant future
Feedback Score: 10 reviews
I'm not convinced it would even fit an sr20 valve cover.
__________________
Quote:
Originally Posted by crimsonrockett View Post
Such a good signature.
TheRealSy90 is offline   Reply With Quote
Old 02-10-2020, 09:35 AM   #566
S14rebuild
BANNED
 
Join Date: May 2019
Location: Florida-FAIL
Posts: 2,497
Trader Rating: (8)
S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild
Feedback Score: 8 reviews
Says listed for ka, rb, guessn it has clearence issuse on the vc for sr20s... still its gotta look ugly on anything.


Anyone have pics of it installed and hoses ran?
S14rebuild is offline   Reply With Quote
Old 04-02-2020, 12:46 PM   #567
PoorMans180SX
Zilvia.net Advertiser
 
PoorMans180SX's Avatar
 
Join Date: Nov 2005
Location: Michigan
Age: 33
Posts: 5,430
Trader Rating: (16)
PoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfection
Feedback Score: 16 reviews
Send a message via AIM to PoorMans180SX
Hey Slider, can you rehost pictures of your setup, photobucket has long ago died. Maybe edit your first post to include the pics?
__________________
Build: http://zilvia.net/f/showthread.php?t=643065

Friends don't let friends buy knock-offs.
PoorMans180SX is offline   Reply With Quote
Old 08-13-2020, 08:13 AM   #568
mr.nismo.
Nissanaholic!
 
mr.nismo.'s Avatar
 
Join Date: Feb 2012
Location: Oxnard, CA
Age: 28
Posts: 1,876
Trader Rating: (31)
mr.nismo. has a reputation beyond reputemr.nismo. has a reputation beyond reputemr.nismo. has a reputation beyond reputemr.nismo. has a reputation beyond reputemr.nismo. has a reputation beyond reputemr.nismo. has a reputation beyond reputemr.nismo. has a reputation beyond reputemr.nismo. has a reputation beyond reputemr.nismo. has a reputation beyond reputemr.nismo. has a reputation beyond reputemr.nismo. has a reputation beyond repute
Feedback Score: 31 reviews
Felt like this thread is reasonable to post this. Ive been tossing around the idea of using an electric pump for crank case evacuation (sr20). I still want to keep the OEM pcv side intact. My idea was using a secondary air injection pump (they max out at 3-4" hg) that's triggered on a 1 psi pressure switch. So basically is idle/cruise the regular PCV will handle evacuation, and then in boost the PCV will close and the pump will take over. The point of the switch is so the pump isn't in constant operation.

Sent from my Galaxy Note 10+ using Tapatalk
mr.nismo. is offline   Reply With Quote
Old 08-13-2020, 10:09 AM   #569
S14rebuild
BANNED
 
Join Date: May 2019
Location: Florida-FAIL
Posts: 2,497
Trader Rating: (8)
S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild S14rebuild
Feedback Score: 8 reviews
Why? Wont the inlet suction of the turbo create enough vacuum todo just that?
S14rebuild is offline   Reply With Quote
Old 08-13-2020, 11:21 AM   #570
PoorMans180SX
Zilvia.net Advertiser
 
PoorMans180SX's Avatar
 
Join Date: Nov 2005
Location: Michigan
Age: 33
Posts: 5,430
Trader Rating: (16)
PoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfectionPoorMans180SX is close to perfection
Feedback Score: 16 reviews
Send a message via AIM to PoorMans180SX
Quote:
Originally Posted by mr.nismo. View Post
Felt like this thread is reasonable to post this. Ive been tossing around the idea of using an electric pump for crank case evacuation (sr20). I still want to keep the OEM pcv side intact. My idea was using a secondary air injection pump (they max out at 3-4" hg) that's triggered on a 1 psi pressure switch. So basically is idle/cruise the regular PCV will handle evacuation, and then in boost the PCV will close and the pump will take over. The point of the switch is so the pump isn't in constant operation.

Sent from my Galaxy Note 10+ using Tapatalk
This would work, yes.

Quote:
Originally Posted by S14rebuild View Post
Why? Wont the inlet suction of the turbo create enough vacuum todo just that?
If you are using a high-flow air filter, there is very little, if any, vacuum in the intake pipe. Even if you were to run a very restrictive air filter, you don't want the intake pulling lots of vacuum out of the crankcase without some way to filter oil out. It also kind of defeats the purpose because now you have a restrictive air filter and you're not going to make more power from pulling a bit more pressure out of the crankcase. It's a compromise.

Also, technically speaking, the pipe that attaches to the air intake isn't to draw pressure out of the crankcase, it's to allow fresh air into the crankcase when the PCV valve is doing it's job at cruise. This allows it to pull the combustion gases (which are acidic) and water vapor out of the crankcase and dump them in the intake manifold more easily.

So it really comes down to whether or not you want to risk getting oil vapor in your intake pipe. You should be able to mitigate the risk with a properly setup catch can with good baffling, or you could just run an open catch can with an air filter and not worry about it.

Engine longevity does rely heavily on good air filtration though, so that's something to consider in itself.

It's all about balance.
__________________
Build: http://zilvia.net/f/showthread.php?t=643065

Friends don't let friends buy knock-offs.
PoorMans180SX is offline   Reply With Quote
Reply

Bookmarks


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 10:01 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
vB.Sponsors
Copyright © 1998 - 2019, Zilvia.net™