WTF, losing boost after VTEC engages
06-06-2006, 10:40 PM
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WTF, losing boost after VTEC engages
Ok, so Im gradually fixing the problems with my car. But now next up to bat is my boost problem.
So say Im in 4th on the highway and go wot. Im spooling, 7psi by 4k rpm, 17 by 5k, then at the vtec crossover at 5400, boost goes way down to 11-12psi and holds steady.
Then say I want 15psi in vtec, it goes to like 19 first, then 15.
So, wtf. I just changed wastegate spring from a .3 bar to a .8 bar I believe in hopes of a stronger spring will hold, but alas, no avail.
My wastegate is a 35mm Tial and its on an elbow off my Inline Pro manifold. I cant figure this out.
Helppppp
EDIT: Boost controller is a Greddy Profec B
Modified by SpeedingHatch at 3:00 AM 6/7/2006
So say Im in 4th on the highway and go wot. Im spooling, 7psi by 4k rpm, 17 by 5k, then at the vtec crossover at 5400, boost goes way down to 11-12psi and holds steady.
Then say I want 15psi in vtec, it goes to like 19 first, then 15.
So, wtf. I just changed wastegate spring from a .3 bar to a .8 bar I believe in hopes of a stronger spring will hold, but alas, no avail.
My wastegate is a 35mm Tial and its on an elbow off my Inline Pro manifold. I cant figure this out.
Helppppp
EDIT: Boost controller is a Greddy Profec B
Modified by SpeedingHatch at 3:00 AM 6/7/2006
06-07-2006, 11:06 AM
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Re: WTF, losing boost after VTEC engages (SpeedingHatch)
Sounds like it's the boost controller-- never messed with one, but I know they have a lot of different settings to play with.
06-07-2006, 12:31 PM
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Re: WTF, losing boost after VTEC engages (tcontesh)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tcontesh »</TD></TR><TR><TD CLASS="quote">sounds like the the spring is slipping the same thing was happening to me</TD></TR></TABLE>
how does a spring "slip"
how does a spring "slip"
06-07-2006, 12:46 PM
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Re: WTF, losing boost after VTEC engages (tcontesh)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tcontesh »</TD></TR><TR><TD CLASS="quote">it can happen with a manual boost controller, I meant boost creep</TD></TR></TABLE>
uhh but he doesnt have a manual boost controller
uhh but he doesnt have a manual boost controller
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06-07-2006, 01:39 PM
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Re: WTF, losing boost after VTEC engages (tcontesh)
its not creep, its loss.
Like, it spools nice and evenly and holds 17 before 5400, then at the crossover, drops instantly to 12 and holds 12 till redline.
wtffffffffff
Like, it spools nice and evenly and holds 17 before 5400, then at the crossover, drops instantly to 12 and holds 12 till redline.
wtffffffffff
06-07-2006, 04:08 PM
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Re: (RedR)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18ccivics »</TD></TR><TR><TD CLASS="quote">what engine management do you have?</TD></TR></TABLE>
06-07-2006, 06:29 PM
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Re: (b18ccivics)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b18ccivics »</TD></TR><TR><TD CLASS="quote">what engine management do you have? f it is not the boost controller check you timing.</TD></TR></TABLE>
Timing is good. Engine management is Zdyne.
With the boost controller off, it still does it
Timing is good. Engine management is Zdyne.
With the boost controller off, it still does it
06-07-2006, 09:27 PM
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Re: (SpeedingHatch)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SpeedingHatch »</TD></TR><TR><TD CLASS="quote">Timing is good. Engine management is Zdyne.
With the boost controller off, it still does it </TD></TR></TABLE>
Update: With the boost controller completely tuned off, the boost holds
With the boost controller off, it still does it
</TD></TR></TABLE>Update: With the boost controller completely tuned off, the boost holds
06-07-2006, 09:55 PM
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Re: (Soccerking3000)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Soccerking3000 »</TD></TR><TR><TD CLASS="quote">odd lol i would just mess with the settings, cause that really shouldnt happen lol as if you didnt know that 
</TD></TR></TABLE>
Im starting to think its anything past 15, it dropps.
I will mess around with it tomorrow and report back the highest psi I can get without it tapering off
</TD></TR></TABLE>Im starting to think its anything past 15, it dropps.
I will mess around with it tomorrow and report back the highest psi I can get without it tapering off
06-08-2006, 03:47 PM
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Re: (SpeedingHatch)
So I seem to have fixed it by switching the vacuum lines around.
One part of the greddy box was T'd to the bov vaccum line off of the manifold, and the other straight of the mani. So I put the bov one by itself and T'd the "in" and "out" of the greddy box to its own source.
Seems to hold well.
Yay
One part of the greddy box was T'd to the bov vaccum line off of the manifold, and the other straight of the mani. So I put the bov one by itself and T'd the "in" and "out" of the greddy box to its own source.
Seems to hold well.
Yay
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