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Not boosting fast enough

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Old 06-07-2010, 08:54 PM
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Not boosting fast enough
im on a 2.85 pulley but when i go WOT from a 40 the psi doesnt go straight to 15 like it should...it goes to 13 then climbs to 16 or so... what can cause that??
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Old 06-07-2010, 09:28 PM
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belt slip
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Old 06-07-2010, 11:44 PM
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i thought belt slip would make it overboost or something like that
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Old 06-07-2010, 11:47 PM
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Better not ever say that again...I got flamed by like 30 ppl for saying that in one of my threads. Eventhough it was on this site that I've previously read that belt slip can cause overboost. It might be ur bbv tho, could just be slow opening/closing
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Old 06-07-2010, 11:49 PM
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Originally Posted by ~Mike~
Better not ever say that again...I got flamed by like 30 ppl for saying that in one of my threads. Eventhough it was on this site that I've previously read that belt slip can cause overboost. It might be ur bbv tho, could just be slow opening/closing
im not saying its that way lol.... i just read that somewhere
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Old 06-07-2010, 11:49 PM
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I would also assume that ur in 2nd during said 40 pull? If ur in 3rd, its not gonna jump straight to peak boost. But I'm guessing I pretty much didn't need to ask that...at least I hope not lol
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Old 06-07-2010, 11:50 PM
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Thought that was normal...Mine always started about 13 but by RL was 14 (if I started a lil low of an rpm for the gear at least)
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Old 06-07-2010, 11:50 PM
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Originally Posted by ~Mike~
I would also assume that ur in 2nd during said 40 pull? If ur in 3rd, its not gonna jump straight to peak boost. But I'm guessing I pretty much didn't need to ask that...at least I hope not lol
nah its def in 2nd lol
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Old 06-07-2010, 11:52 PM
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I think your car is boosting properly. My 2.9 car will boost to around 12-13 immediately then it gradually makes it up to 15-16 by redline. Its not going to boost straight to 15-16.
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Old 06-07-2010, 11:54 PM
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Originally Posted by stealthy1ss
I think your car is boosting properly. My 2.9 car will boost to around 12-13 immediately then it gradually makes it up to 15-16 by redline. Its not going to boost straight to 15-16.
i guess i just need to hear from someone else with a 2.85
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Old 06-07-2010, 11:54 PM
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Its boosting just fine. My tvs boost to 15 then goes to 23psi by the time I hit 6k rpm.
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Old 06-07-2010, 11:55 PM
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what exhaust setup are you running
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Old 06-07-2010, 11:56 PM
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well i guess i feel better lol

Originally Posted by hatrickstu
what exhaust setup are you running
ZZP shorty header with catted downpipe and 2.5 magnaflow catback
Last edited by CobaltVenomSS; 06-07-2010 at 11:56 PM. Reason: Automerged Doublepost
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Old 06-07-2010, 11:58 PM
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its a long shot but it could just be back pressure at the higher rpm. more than likely its completely normal. i think i remember my 2.7 going from 15 and climbing at most 1psi or so
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Old 06-08-2010, 12:00 AM
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i wanna go catless...but i dont want it to sound like crap
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Old 06-08-2010, 12:04 AM
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car is boostiong just fine you dont hit specific peak boost for a certain pulley size until around 5800ish RPM

catless? you say vibrant down pipe.... or watch you tube vids of other peoples setups and choose that way bro
Last edited by SloBaltS/C; 06-08-2010 at 12:04 AM. Reason: Automerged Doublepost
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Old 06-08-2010, 12:04 AM
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Originally Posted by CobaltVenomSS
i guess i just need to hear from someone else with a 2.85
The difference is minimal. Maybe 1-2lbs of boost.
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Old 06-08-2010, 10:26 AM
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I just bolted in an OTTP stage 2 with a 2.8 pulley and it does the same thing. I think it's normal. Even stock it would hit 10psi then climb to 12.
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Old 06-08-2010, 10:36 AM
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Originally Posted by roderick
Its boosting just fine. My tvs boost to 15 then goes to 23psi by the time I hit 6k rpm.
what pulley are you running, any why do you only rev to 6k
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Old 06-08-2010, 10:39 AM
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i suggest 1" catback for building boost faster

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Old 06-08-2010, 10:41 AM
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Yep, my TVS shoots to 15-16 then climps to 20-21ish by redline. I believe it's just how these blowers work. RPMs = Boost. If you want more, pulley down lol. 2.6" feels nice and strong on a M62.
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Old 06-08-2010, 12:06 PM
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Originally Posted by hatrickstu
its a long shot but it could just be back pressure at the higher rpm. more than likely its completely normal. i think i remember my 2.7 going from 15 and climbing at most 1psi or so
Second this. It's normal.
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Old 06-08-2010, 01:00 PM
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Originally Posted by freakta
what pulley are you running, any why do you only rev to 6k
No I wasnt saying that I only rev to 6k I was saying thats when I see full boost. I rev to 7200rpm I am running a 2.8 pulley.
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Old 06-08-2010, 01:06 PM
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catless doesnt sound like **** on the ss unless you have a shitty catback. but it is very loud
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