another boost spike
Thread Starter
Joined: Aug 2004
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From: Mpls, MN, USA
another boost spike
after days of research and trying everything i cant figure out why my car is spiking all the way to 17 psi when i have a 7 psi spring....any help would be appreciated...car ran fine until recently...
Mr. Badwrench
Joined: May 2002
Posts: 14,146
Likes: 2
From: stranger in a strange land
Re: another boost spike (Midwest Auto Salon)
where are you catching your boost signal for the waste gate?
if it isn't before the throttle plate, preferable right off of the compressor housing, start there. make sure your waste gate has a boost signal, if it does, hook a mighty vac to it and see if it holds vacuum, if it doesn't, your diaphragm is ripped.
if it isn't before the throttle plate, preferable right off of the compressor housing, start there. make sure your waste gate has a boost signal, if it does, hook a mighty vac to it and see if it holds vacuum, if it doesn't, your diaphragm is ripped.
Thread Starter
Joined: Aug 2004
Posts: 339
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From: Mpls, MN, USA
Re: another boost spike (boostedcivicsir)
i have a line going from w/g (top of tial) to the bottom of my mbc and the other one out the side of mbc to the intake manifold. i have no nipple on the compressor of the turbo. Ran fine and had it tuned at 300 whp and all of a sudden its fawked...
Honda-Tech Member
Joined: May 2003
Posts: 5,735
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From: Portland, Oregon
Re: another boost spike (boostedcivicsir)
What kind of MBC?
It could be sticking and causing a spike.
Does it hold steady at 17psi? Or, does it spike and then settle at a lower boost level?
It could be sticking and causing a spike.
Does it hold steady at 17psi? Or, does it spike and then settle at a lower boost level?
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Thread Starter
Joined: Aug 2004
Posts: 339
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From: Mpls, MN, USA
Re: another boost spike (Midwest Auto Salon)
thanks for the help for whoever replied...ended up being a stick mbc....changed out a new one and all good now.....looking for a e-tron one now.... 
Mr. Badwrench
Joined: May 2002
Posts: 14,146
Likes: 2
From: stranger in a strange land
Re: another boost spike (Midwest Auto Salon)
if you are looking at a good e-bc, may i suggest either the blitz dual sbc, which i have at 17 psi right now, or baller style with the sbc-id which is on out tt-350z.
Honda-Tech Member
Joined: Jan 2005
Posts: 385
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From: Holley 4053, carb 406 stroker anal Luber, Fag
Re: another boost spike (Midwest Auto Salon)
im not trying to be an ***, but why would you let your car boost that high and not taking your foot off of the gas pedal?
Junior Member
Joined: Jun 2004
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From: warrensburg, MO, US
Re: another boost spike (V8MeatHead)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by V8MeatHead »</TD></TR><TR><TD CLASS="quote">im not trying to be an ***, but why would you let your car boost that high and not taking your foot off of the gas pedal?</TD></TR></TABLE> he said it spiked whitch means that he was getting on it and it quickly jumped to 17 psi. it happens very quickly and i am sure he let out of it as soon as he figured out it spiked
Honda-Tech Member
Joined: Aug 2001
Posts: 4,451
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From: 909, Ca, US
Re: another boost spike (Midwest Auto Salon)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Midwest Auto Salon »</TD></TR><TR><TD CLASS="quote">some gears it will hold sometime it will settle....i am running straight off w/g still hits 17 psi</TD></TR></TABLE><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Midwest Auto Salon »</TD></TR><TR><TD CLASS="quote">thanks for the help for whoever replied...ended up being a stick mbc....changed out a new one and all good now.....looking for a e-tron one now.... </TD></TR></TABLE>
how does that work?
how does that work?
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