boost spike - Subaru WRX Forum
 
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#1 Old 04-13-2008, 10:20 PM
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boost spike

is there any definitive way to cure boost spike with the 2.5's?
everybody i talk to says something different
gm bcs
prodrive bcs
adjust wastegate arm
port wastegate
go ewg
bleed type mbc
im only spiking 2 psi over my target to 19.5. but i just want to give a shot at fixing it so i dont wear the seals out on my td04. otherwise my car runs fine according to logs and i get no fuel cut.
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#2 Old 05-24-2008, 11:32 PM
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Only time you have to worry about boost creep is if your running a catless dp, but I dont see that you are in your mods list. To answer your question go to cobb.com and they have a restictor pill fix for boost creep, or get a good tune/somekind of em (only need this if you running a catless dp) other than that you should have no isue with boost creep. It just may be you boost gauge acting up. what kind of gauge do you have?
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#3 Old 05-25-2008, 09:14 AM
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The stock bcs does not do very well at higher boost levels.Even the 2.0L's have problems with the stock BCS when running higher boost pressures (18psi +).This of corse can be a problem with the 2.5L WRX's when your running that high of boost pressure regardless of you have a catted DP or not.The stock BCS can't bleed the air off fast enough.Get a 3 port BCS.

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#4 Old 05-25-2008, 09:17 AM
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Don't adjust the WG arm unless your at your tuners and they can alter the map. You can use a combo of a 3port bcs, ported WG, and a tune for the bcs and that should solve the problem. You're not spiking badly but like myself you also want your car to run as best it can.

Mike
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#5 Old 05-25-2008, 09:22 AM
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Quote:
Originally Posted by dumdum View Post
Get a 3 port BCS.
Yeah, not to mention your tuner should be able to make the TD-04 spool a bit sooner with it. It will help hold boost much better as dumdum said.

Mike
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#6 Old 07-05-2008, 09:43 AM
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boost creep

Quote:
Originally Posted by sfelix818 View Post
Only time you have to worry about boost creep is if your running a catless dp, but I dont see that you are in your mods list. To answer your question go to cobb.com and they have a restictor pill fix for boost creep, or get a good tune/somekind of em (only need this if you running a catless dp) other than that you should have no isue with boost creep. It just may be you boost gauge acting up. what kind of gauge do you have?
i had the same problem all i did was swap my boost lines with a buddie that had a 2003 wrx off his old turbo and i havent had a overboost problem yet!
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