Stancyeze

Basically I'm wondering where I can route my HKS BOV. I have an enthalpy tune for basic bolt ons and I had the BOV on the hit side pipe of my ISR piping kit and it has problems idling after I let off the gas. So I blocked off the BOV and it runs perfect. High boost pulls are great but it has compressor surge obviously because the air isn't released.

Basically I'm asking where can I mount the BOV and not run into any idling issues. I think I can do the cold pipe by the throttle body but I just want extra info before I weld it there and then have the same issue.

hanzbrady

Recirculate it like factory and you can put it wherever you want with no issues

__________________
[email protected]

Stancyeze

How exactly do I go about that? The HKS only has a small vacuum nipple on it, the stock recirc had a large hose nipple on it.

hanzbrady

__________________
[email protected]

s13silvia123

like this

__________________
18g and 20g turbo users click on me
http://zilvia.net/f/tech-talk/261219-18g-20g-turbo-users.html

Stancyeze

Will that fit a fake HKS? Bought the car with and it already had a BOV on it and I'm pretty sure it's a fake one lol

hanzbrady

The website says it has to be the HKS cover so no guarantees

__________________
[email protected]

Stancyeze

Okay, but will my plan work? To have the BOV on the cold side uncirculated. Would that cause any issues?

KAT-PWR

You will have the issue no matter where the bov is unless it is recirculated.

Either recirculate it

Or change to a blow through maf set up

To answer the next question, look up blow through maf.

__________________
MRP Manufacturing

Stancyeze

Just made it simple for myself and a bought SQV 3, comes with recirc flange.

hanzbrady

That's the spirit

__________________
[email protected]

Jorgs_7

Atmosphere / speed density


Done / end

KAT-PWR

Ayy yo, who's mans is this?

__________________
MRP Manufacturing

anti tyler

Just move the mass airflow sensor to after the BOV. So you can chirp at people all day.

I personally run a blow through setup.

__________________

KA-T for life!
Current for sale advertisement

[email protected]

either recirculate or surge. my personal Z32 surges all day. N-Attack GTR Surges (actually most of the Corporate Race Cars surge for all the throttle responsies) I know personally of people going on 4+ years surging their T25's and T28's without issues (while i've also known people to seize turbos days after surging).

__________________
Competition Engines & Dyno Tuning.

(951)708-1648 | [email protected]

Stancyeze

Yeah, I let it surge for the couple days I drove it since this is a street/track car and it sounds good but I know it's terrible for the turbo. Especially since I don't know the real mileage of this motor set, I'd rather keep it safe and not blow the turbo already haha

justinbyrant

a small amount of surge wont hurt it, if your blocked completely its going to cause problems but if you have a little surge from the bov not releasing air fast enough its going to reduce the life of the turbo by such a minimal amount its not even really measurable, comp surge can mean multiple things almost all of which make the same noise but aren't all terrible, im running a hks bov recirced from my cold pipe about 6 inches from my throttle body and I have small amounts of comp surge and both sizes of the hks recirc fitting, Im using the smaller fitting because even though I get a little surge with it the response is very noticeable, there is no spool time between shifts at 15 psi and im running an open dump tube so its very noticeable, the screamer pipe is screaming before my foot hits the floor again after every shift where as with the larger fitting it takes a second to hit full boost again

KAT-PWR

I have a feeling you're getting a bit of a placebo effect. No spool time? These are all subjective accounts that have 0 quantification.

__________________
MRP Manufacturing

LoSt180

Ditto above recommendations that it needs to be recirculated.

I have my HKS in the stock location (cold side) using the stock cross-over tube back into the intake.

Can see part of it tucked under the fusebox/cold pipe here.

Stancyeze

I have the ISR pipe kit that's modified to fit my high mount intercooler, but my BOV is on the hotside. Makes it easier for me honestly.. less hoses going across the car and what not.

justinbyrant

No, this is a very noticeable difference, its not something small that makes me feel better about myself lol its literally the difference between the wastegate opening a half a second after shifting or a full second after shifting, drifting is also much much easier, far less clutch kicking

hanzbrady

Back to doing things right, if you must have all the atmospheric fluttery noises and want driveability, and peak response put on your big boy pants and get an ECU capable of using a MAP signal and programming for anti-lag with flat-foot shifting.

That's how you properly install a blow off valve vented to atmosphere with no side effects and only benefits.

/thread.

__________________
[email protected]

justinbyrant

Im confused as to what your trying to get at here, no one said anything about venting to atmosphere, and I don't have tons of flutter or any loud noises, my bov and flutter is almost to quiet to hear, this isn't a cool jdm points style thing to have the loudest flutter and ruin a turbo, im recirculating my bov but I used the smaller hks fitting rather than the larger one that lets off more air, because as I stated the difference is very noticeable, dealing with a little flutter to me is worth it for the much faster response

TheRealSy90

How about we ask the question whether hot pipe or cold pipe location is best? Also I can't see any benefit to recirc on a MAP based setup?

__________________

hanzbrady

I didn't say there was one, I was kind of addressing all of the band aids people have suggested in one post.

And as far as cold pipe vs hot pipe closer to the compressor housing where you want to evacuate surge is always best but not always ideal due to packaging issues.

__________________
[email protected]

justinbyrant

there really isn't any benefit to recirc on a map setup plus no recirc = cool pshhhh sounds, I would also say hot pipe as close to the turbo would be best if you can find a place to make it fit

R3b

Hot pipe all day with a blow through setup. Light throttle it flutters all day on my top mount .63 and then full throttle make the stereotypical hks chirp.

RB25GUY

I beg to differ recirc setups on high hp SR will only help the turbo spool faster and still makes animalstics noises and cold side will always be the correct side imo







same car same setup Recric Greddy Type R bov

__________________

feito

At first glance i was like "a smic with a top mount turbo setup? And such a small cold pipe??!" Hahahaha

KAT-PWR

How can venting small amounts of pressure to atmosphere (intake) help the turbo spool faster? That pressure is immediately lost in the intake tube

__________________
MRP Manufacturing