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BOV FAQ

Started by R-A-Y, March 14, 2005, 05:01:51 pm

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Pro2type

Is it advisable to put BOV in a stock evo or sti?

R-A-Y

Very controversial mod actually for stock Evos and STis. Usually the stock recirculating BOV is sufficient for up to 400HP and no tuning.

Replacing just the BOV will make the car run overly rich for a short period on that time when you close the throttle. It seems to be not so harmless until your cat converter starts to heat up. There are even some reports that it can get som bad that it starts to glow.

If you are out for the sounds while not compromising your A/F mix, you can get any Vent to Atmosphere (VTA) BOV and just have it re-tuned, or get the hybrid BOV that is both recirculating and VTA. I believe it's Turbosmart or TurbXS that produces these hybrid BOVs

HTH :)

Conan®

Quote from: R-A-Y on October 31, 2005, 06:25:24 pm
Very controversial mod actually for stock Evos and STis. Usually the stock recirculating BOV is sufficient for up to 400HP and no tuning.

Replacing just the BOV will make the car run overly rich for a short period on that time when you close the throttle. It seems to be not so harmless until your cat converter starts to heat up. There are even some reports that it can get som bad that it starts to glow.

If you are out for the sounds while not compromising your A/F mix, you can get any Vent to Atmosphere (VTA) BOV and just have it re-tuned, or get the hybrid BOV that is both recirculating and VTA. I believe it's Turbosmart or TurbXS that produces these hybrid BOVs

HTH :)


OT, It's time to remove your catalytic converter for more power gains! ;D I added about 30 kph to my top end when I removed mine.

R-A-Y

Quote from: Conan on November 01, 2005, 12:29:52 am
OT, It's time to remove your catalytic converter for more power gains! ;D I added about 30 kph to my top end when I removed mine.


Hahahaha yes I have to remove it ;D Very very soon :)

Conan®

With the kind help of Speedyfix I modified my factory Blow-Off Valve from this modification guide here:

http://www.nissansilvia.co.nz/tech/factorybov.htm

We blocked off the small hole with a screw and some Loctite.

This is strictly for Nissan Silvia BOV's. Though I haven't really pushed the car yet since it's been raining since I had it done, but off hand my car is a bit more responsive in the lower end and there's a slightly louder indication that the BOV is working more compared to before. It's not very loud though as it is "plumbed back" into the intake, but I can here it through my aftermarket air filter.

zoids

November 15, 2005, 06:08:21 pm #20 Last Edit: November 15, 2005, 06:09:42 pm by zoids
Quote from: Conan on November 01, 2005, 12:29:52 am
OT, It's time to remove your catalytic converter for more power gains! ;D I added about 30 kph to my top end when I removed mine.


OT:  cooonan, you're going to do some harm on  the   environment.. >:(....remember, more carbon monoxide causes greenhouse effect.. :o....and then, the emission test when registering your vehicle... :P....peace man... ;D...

borly

i just read the article, it's amazing how blocking of that small hole can increase performance... :)

hehe angelo and migs s14 tandem... twin drift!
"Wealth is of the heart and mind. Not the pocket."
-BBC

Conan®

Quote from: zoids on November 15, 2005, 06:08:21 pm
OT:  cooonan, you're going to do some harm on  the   environment.. >:(....remember, more carbon monoxide causes greenhouse effect.. :o....and then, the emission test when registering your vehicle... :P....peace man... ;D...


Actually bro I pass the emissions test quite easily even without the catalytic converter. ;D

@Borly si Migs manual tranny so it will be much easier to drift in his car. ;)

zoids

Quote from: Conan on November 16, 2005, 04:18:03 am
Actually bro I pass the emissions test quite easily even without the catalytic converter. ;D



OT: ha?!... i might as well remove mine then ::) do you think it would have the same effect on mine..N/A 'matic? ???

R-A-Y

I believe it will. We have pretty low emission standards here eh.

zoids

Quote from: R-A-Y on November 16, 2005, 07:04:45 pm
I believe it will. We have pretty low emission standards here eh.


ok R-A-Y will do it sometime this week...was very busy this weekend. thank you  :D

borly

i recently heard the sard r2d2 bov of my friend... hehehe twas really nice... it sounds like a whip!

Conan®

Quote from: andrew_borly on November 27, 2005, 04:01:20 am
i recently heard the sard r2d2 bov of my friend... hehehe twas really nice... it sounds like a whip!


On what car was it installed? Did he get it from Autoplus?

CSA-entrepreneur

with my evo, back then, i had a TBE (turbo back exhaust) as my first mod. after that, ive been hearing a little spool up.. i then installed a HKS RS Intake (the one that looks like a beehive), with stock BOV, and damn that was loud! the evo stock MR BOV actually could hold my boost (which was tuned at 20.5 PSI with my manual boost controller), but when i got my greddy type-s bov, it sounded so sweet..

i vented it to atmosphere and whoa, i love revving up at inside parking lot structures by the wall at corners with the hood popped.
FOR SALE!!! RUSH SALE!!
Accepting considerable offers!

1990 Nissan Skyline R32 GTS-T
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NSR

Quote from: CSA-entrepreneur on January 22, 2006, 06:00:56 pm
i vented it to atmosphere and whoa, i love revving up at inside parking lot structures by the wall at corners with the hood popped.


oohh..how i envy the feeling of simply revving up then hearing your BOV scream  :-\

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