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should i get a bov

SXC180

By SXC180,
in General Automotive Discussion

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BHDave Grand Master

BHDave

Posted
Posted

Once you start moving a lot of air it's worth an upgrade as the stocker can't dump the pressurised air quickly enough.

In your case i'd say it's a worthwhile upgrade. One with a big piston like the turbosmart supersonic or plumb back would do it. Or bigger.

paulr33 Grand Master

paulr33

Posted
Posted
  B-Man said:
Blow of valves are such a wate of money - not only do the increase the time to death of your turbo - they are very cost articultate.

ha ha ha ha ha ha ha ha

Go the quad BOV - way to go !

Increase the time of death? How so exactly? Costly? $200-$300 to ensure the life of the turbo and provide proper air ventilation, hardly costly.

The stock BOV will be leaking quite a lot. You said you run about 20psi. At 17psi the stock BOV will leak around 2-3psi mark. At 20psi its probably leaking 3-4psi. Check a recent trhead titled "free stock bov mod" which covers blocking the leak hole on the stock bov. Also has microtech data logs on a car running a GT2530 and 17psi. With the normal it leaks around 2-3psi. With the hole covered up (aka a new aftermarket bov) it held upto 19psi as it wasn't leaking during spooling.

Of course you could simply just cover up the leak hole. Just remember an amto bov will probably cause your car to stall when u go from low rpm + boost to idle as the air flow sensor goes nuts, not sure on exact technicals but thats what happens.

paulr33 Grand Master

paulr33

Posted
Posted

On a stock sr20det or rb20ddet,rb25det i would say an aftermarket bov is probably overkill unless you want the pschht or flutter. However with an aftermarket turbo then certain get a proper bov, you already have a proper turbo and wastegate, why not a bov.

Also the flutter will cause damage. The flutter is the air pressure go back thru the pipes and hitting the turbo compressor wheel aka compressor surge. The vl turbos do this out of the factory as they didnt come with a bov. After a gear change the pressure goes back the way it came and hits the compressor. The turbo will surge (flutter noise) and loose pressure and give some lag too as its being spun in reverse, it then its a bit more pressure to spin it back the other way and start spooling again. The bov will prevent this and stop the surging occuring, unless its a plumback crap design one :D

The flutter is what "increases the time of death" not a correctly fitted bov

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