North American Turbocoupe Organization



Boost Problem
Pete D Offline
Administrator
#1
Lately my boost has been going to about 10 psi and then building much slower than normal above 10 psi. I can still get to 19-20 psi but it's way up in the rpm range. I have a gillis installed. I'm wondering if it could be related to the cheap Bosch BPV I have on it. What happens when these fail?
Pete Dunham


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Jr88TC Offline
Member
#2
last week i had a similar problem with my BPV. it got stuck open! The piston got stuck halfway open and wouldn't allow more then 5psi unless i had it floored then it would slowly build alittle more boost. I could hear the turbo spooling but i guess trying to compress the air between the VAM and TB isn't a easy task. [Image: smile.gif]
Jr.
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Jr88TC Offline
Member
#3
i disliked the bosch i had so i bought a TurboXs one. The TurboXs one seem to work alot better then the bosch and is adjustable(washers).
Jr.
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Pete D Offline
Administrator
#4
I know I have been living on borrowed time with the Bosch valve. I just want to see what experience others have had when it failed.

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NATO Member. it's not a vice, it's an obsession
Letting the cat out of the bag is a whole lot easier than putting it back in.
88 TC X 2, 86 SVO, mods list at
http://www.turbotbird.com/showroom/pd_88tc.htm
Pete Dunham


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Jr88TC Offline
Member
#5
I bosch i had never broke, but i didn't give it much time to either. One thing i noticed with the bosch i had is didn't always open. The valve seemed to work differently everytime.
Jr.
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Jeff K Offline
Administrator
#6
When my Bosch took a dump, it starting making a farting sound under high boost. Switched to a Forge valve, which fit perfectly in place of the Bosch one.

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Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 20 psi, forced air intercooler, water injection, bypass valve, Ranger roller cam, subframes, etc., etc.. // 86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP nitrous, ignition, gears, suspension, etc., etc.... // 91 Escort: Bone stock winter car // 02 Taurus Vulcan(wifes car)
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
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Pete D Offline
Administrator
#7
Jeff, where did you get the Forge?
Pete Dunham


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