Stock Motor vs SR20??? I'm Confused...

[SixthSpeedRacer]

I am still Learning.....

I am very new to Nissans! So...........
If the stock motor in a 240SX is 2.4 Liters then whats so great about the SR20 if its only 2.0 Liters..............??????????
I'm so confused!
Please clear this up for me............Thanks so much!

[AceInHole]

the SR comes turbocharged.

[orange-grey]

The KA24 is a warmed-over pickup truck motor. Long stroke, weak rods, small cams, breathes like an asthmatic gopher. Good for trying to blow up, or like me, get you to work.

The SR20 was forged by the hands of Mr. K on the top of Mt. Fuji as the worlds greatest race motor and pinnicle of JDM ricer fappiude. They have been known to survive nuclear blasts on occasion and put out 800 hp with just an aquarium valve. Great for putting in S2000's with nawz and absoulutely critical for being mad tyte JDM dorifto master number one.

[some guy]

Originally posted by orange-grey
The KA24 is a warmed-over pickup truck motor. Long stroke, weak rods, small cams, breathes like an asthmatic gopher. Good for trying to blow up, or like me, get you to work.


This part is mostly true, but I thought the KA has forged rods from the factory? How much HP can a KA24DE handle without rebuilt?

[Jeff240sx]

Originally posted by some guy
This part is mostly true, but I thought the KA has forged rods from the factory? How much HP can a KA24DE handle without rebuilt?

18psi, and 360some rear wheel horsepower.
-Jeff

[andrave]

sr20det comes overbuilt and turbocharged. The max safe boost you can run on the ka24de is 7 psi. The engine makes lots of torque down low but itsn' t as much fun to drive as some of the other high revving imports.
the sr20det can produce 200 rwhp on the stock engine and turbo with a boost controller, intercooler, intake, and exhaust. With a larger turbo on the stock engine, it can produce impressive power. Bored out to 2.2 liters with a T05 conversion, one guy makes 600 HP on his.

[Phlip]

Originally posted by orange-grey
The KA24 is a warmed-over pickup truck motor. Long stroke, weak rods, small cams, breathes like an asthmatic gopher. Good for trying to blow up, or like me, get you to work.

The SR20 was forged by the hands of Mr. K on the top of Mt. Fuji as the worlds greatest race motor and pinnicle of JDM ricer fappiude. They have been known to survive nuclear blasts on occasion and put out 800 hp with just an aquarium valve. Great for putting in S2000's with nawz and absoulutely critical for being mad tyte JDM dorifto master number one.
*jerk off hand motion*

Originally posted by Jeff240sx
18psi, and 360some rear wheel horsepower.
-Jeff
and from what I understand, you AIN'T going too much further than that without opening your SR, and will still have less torque than your "warmed over truck motor with asthmatic gopher," long stroke is good for something.



P.S. WHAT THE FUCK is an aquarium valve?

[Foxcolt]

P.S. WHAT THE **** is an aquarium valve


DSM trick, where you use one to make a manual boost controller works pretty well. It was even featured in stupid street or something like that.



SR vs. KA whoo!! yay! yippe!

My view and the bottom line cause I'm the fookin hizzy.

non built ka's blow. Built KA's are fookin monsters. I've riden in stock turbocharged ka's. yay. I've riden in built monster charged ka's YAY!!!!

[Phlip]

Originally posted by Foxcolt



DSM trick, where you use one to make a manual boost controller works pretty well. It was even featured in stupid street or something like that.
Thanks a bunch...



SR vs. KA whoo!! yay! yippe!
Wasn't it about time for the weekly KA vs. SR?

non built ka's blow. Built KA's are fookin monsters. I've riden in stock turbocharged ka's. yay. I've riden in built monster charged ka's YAY!!!!
The final answer that, for some odd reason is always arrived to, now could someone PLEASE lock this damn thread?

[AKADriver]

aquarium valve = a plastic ball & spring air valve used in aquarium bubbler systems. In a car you can use one to bleed air off the wastegate actuator line for more boost. Cheap-o manual boost controller.

[Phlip]

Originally posted by AKADriver
aquarium valve = a plastic ball & spring air valve used in aquarium bubbler systems. In a car you can use one to bleed air off the wastegate actuator line for more boost. Cheap-o manual boost controller.
Cool, I knew what it was, but for some odd reason never thought that someone would trust an engine to something so cheap, nor would I have ever thought of that personally... I'll spring for a real boost controller whne I get to that part of my buildup.

[Foxcolt]

Originally posted by AKADriver
aquarium valve = a plastic ball & spring air valve used in aquarium bubbler systems. In a car you can use one to bleed air off the wastegate actuator line for more boost. Cheap-o manual boost controller.

What do you mean "bleed air of the wastegate actuator line" .

if you mean redirect air then you'd in essence be causing a vaccum leak. Or something of the sort.

All boost controllers manual or electronic "block" air from the wastegate actuator until a specific pressure has been achieved. Then they let the air into the actuator or actuator line "depending on setup" to actually open the wastegate.

I'm sure you knew this I think your post was a tad bit misleading though.:D

[Jeff240sx]

This whole damn post is wrong!
Originally posted by andrave
sr20det comes overbuilt and turbocharged. The max safe boost you can run on the ka24de is 7 psi. The engine makes lots of torque down low but itsn' t as much fun to drive as some of the other high revving imports.

First, 7psi is the max safe boost you should run on the STOCK FUEL SYSTEM! I am pretty sure that I've said the stock KA can go to 18psi! TY did it, and Dennis runs 15psi daily, at 350rwhp.

Originally posted by andrave
the sr20det can produce 200 rwhp on the stock engine and turbo with a boost controller, intercooler, intake, and exhaust. With a larger turbo on the stock engine, it can produce impressive power. Bored out to 2.2 liters with a T05 conversion, one guy makes 600 HP on his.
Woot! Turbo - $2k, JUN stroker kit - $3k, ect.
Duy built a KA to 500rwhp with a t70, THEN added a 150shot of nitrous on top of that!

Can we stop debating the merits of KA vs. SR now? It seems to be a preference thing.
-Jeff

[Jeff240sx]

Originally posted by Foxcolt
What do you mean "bleed air of the wastegate actuator line" .

if you mean redirect air then you'd in essence be causing a vaccum leak. Or something of the sort.

All boost controllers manual or electronic "block" air from the wastegate actuator until a specific pressure has been achieved. Then they let the air into the actuator or actuator line "depending on setup" to actually open the wastegate.


I don't know. My friend's HKS manual boost controller in his Z31 was a bleeder valve. So are aquarium valves. His kit came with 1 T-fitting to splice into the actuator line, and then the 3rd line went to the MBC. From the MBC, the instructions said to route the "dump line" from the MBC into the engine bay.
I was always under the assumption that if you could control the ammount of air that is bieng released, the turbo would have to spool that much more to overcome the air loss, and still actuate the wastegate. If the car runs 7psi stock, then you lose 2 psi through the vaccuum leak, means the actuator would "see" 5psi, but be making 7. So, it would make 2 more psi to overcome that loss, putting the output at 9psi, yet the wastegate is only seeing 7.
-Jeff

[AKADriver]

Originally posted by Foxcolt
What do you mean "bleed air of the wastegate actuator line" .

if you mean redirect air then you'd in essence be causing a vaccum leak. Or something of the sort.

'tis exactly what I'm talking about:

http://www.xmission.com/~dempsey/perform/bleed1.jpg

The DSM guys might do it differently, this is the classic turbo dodge wastegate bleed.

[Foxcolt]

Originally posted by Jeff240sx
I don't know. My friend's HKS manual boost controller in his Z31 was a bleeder valve. So are aquarium valves. His kit came with 1 T-fitting to splice into the actuator line, and then the 3rd line went to the MBC. From the MBC, the instructions said to route the "dump line" from the MBC into the engine bay.
I was always under the assumption that if you could control the ammount of air that is bieng released, the turbo would have to spool that much more to overcome the air loss, and still actuate the wastegate. If the car runs 7psi stock, then you lose 2 psi through the vaccuum leak, means the actuator would "see" 5psi, but be making 7. So, it would make 2 more psi to overcome that loss, putting the output at 9psi, yet the wastegate is only seeing 7.
-Jeff

interesting... from what you say it seems as though some of the older boost controllers were like that. Don't see the point though. Seems like a pretty inefecient design. I'm sure that would cause problems in high boost situations. ie running rich etc..

Akadriver: Pictures make everything better! I understand what you were saying but like I just stated it seems like a very faulty design. To just let vacuum into the atmosphere? vierd. that would cause you to jerk every time the wastegate would open at full throttle.

[Phlip]

Originally posted by Jeff240sx

Can we stop debating the merits of KA vs. SR now? It seems to be a preference thing.
-Jeff
Agreed, now I will give you a dollar if you lock this thread.

[Jeff240sx]

Originally posted by PHLIP
Agreed, now I will give you a dollar if you lock this thread.

Paypal @ [email protected] Pay up!
-Jeff

[Jeff240sx]

Oh yea! Start a new topic if you would like to discuss the merits of bleeder valve vs. redirection in MCBs.
-Jeff