need help with greddy blow off valve type rs for evo 8 2003

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#21

12-22-2006 | 10:52 AM

TheEngineer

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Joined: Jan 2006

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RE: need help with greddy blow off valve type rs for evo 8 2003

Quote:

ORIGINAL: silvercoupe97

18-19+ is just way too high IMO, for a stock car, but it would help us "see" the car with a mod list.
Take pics of things that don't look stock and if you aren't sure...definitely take a pic.

not on an evo. Those already run that right out of the factory. Not that it really holds that boost to redline. But it spikes around there i believe

#22

12-22-2006 | 07:43 PM

luni

Thread Starter

Joined: Dec 2006

Posts: 19

RE: need help with greddy blow off valve type rs for evo 8 2003

when they first install the rs bov, the check engine light didnt come on. but after my car keeps on stalling, this one time when i turn my engine back on, the check engine light did came on. it came on for a while and it didnt go off for like the whole day. but when i went to work later that night, the check engine light was gone. will my car be ok or would you recommend me to have it check out.

#23

12-22-2006 | 08:01 PM

EMonz57

Senior Member

Joined: May 2005

Posts: 12,084

RE: need help with greddy blow off valve type rs for evo 8 2003

Next time the light goes on bring it to autozone and have them check the code

#24

12-22-2006 | 08:02 PM

EMonz57

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Joined: May 2005

Posts: 12,084

RE: need help with greddy blow off valve type rs for evo 8 2003

Quote:

ORIGINAL: silvercoupe97

Hard i/c piping and an aftermarket intake will help in having a louder sound blow off. The pigeon sound is, like TE stated, is compressor surge and that surge is bad at higher psi. Stop boosting and lower the preload on the spring.

Sounds like you have a boost/vacuum leak somewhere. Do you have a boost leak tester? There's a how-to in the vFaq on how to make one.

List your mods for us so we're not chasing a factory bug if we should be chasing a modded bug, if you would please. That will help us help you with your boost setting too. 18-19+ is just way too high IMO, for a stock car, but it would help us "see" the car with a mod list.
Take pics of things that don't look stock and if you aren't sure...definitely take a pic.

2005-2006 EVOs run 20.5 PSI from the factory the 2003-2004 EVOs run 19.5 and taper to 16 from the factory

#25

12-22-2006 | 09:34 PM

luni

Thread Starter

Joined: Dec 2006

Posts: 19

RE: need help with greddy blow off valve type rs for evo 8 2003

just got back again from the motorsports shop. well they figured out why my car keeps on stalling now. they said the rs bov had something wrong on the discharge. well i dont know if its good news or bad news but the guy said he was going to return the greddy rs bov back and trade it for a hks bov. will the hks bov be better.