North American Turbocoupe Organization



turbo lag
88birdmobile Offline
Member
#1
after having the car sit for about 2-3 months, I took it for a drive and by the time I gat to about 5500rpm's I only have about 10psi of boost, I had previously shortened the hoses for the boost controller to clean things up in the engine compartment. Could that have caused this problem?What else could have caused this problem? Thanks

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88TC rebuilt a4ld, 8ua, gillis @ 17, K&N on vam, stock size exhaust(dual flowmasters and no cat), 255 walbro pump, kirban afpr, HKS SSQV blowoff valve, T5 coming soon
88TC rebuilt a4ld, 8ua, gillis @ 17, K&N on vam, stock size exhaust(dual flowmasters and no cat), 255 walbro pump, kirban afpr, HKS SSQV blowoff valve, T5 coming soon
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Pete D Offline
Administrator
#2
What kind of boost controller? Did you ever get more than 10 psi?
Pete Dunham


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88birdmobile Offline
Member
#3
a gillis valve, it's not really limited to 10psi. It just wont spool fast enough, it runs out of rpms too fast. I switched the vam from my parts car onto it (I was painting the bracket), think maybe the vam door is sticking?
Thanks
88TC rebuilt a4ld, 8ua, gillis @ 17, K&N on vam, stock size exhaust(dual flowmasters and no cat), 255 walbro pump, kirban afpr, HKS SSQV blowoff valve, T5 coming soon
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Ryan H Offline
Posting Freak
#4
I think the best thing to do right now is rule both the VAM and the turbo's physical condition out first..

Take the compressor inlet off of the turbo and check the blades for damage and/or shaft play and in/out play. Make sure they don't touch the housing. Put it back together, don't forget the orange ground wire.

Since you're already in there, go ahead and check your VAM door too [Image: smile.gif]

How about it?

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Ryan Harris

88 TC, 5 speed, B&M Ripper Shifter, Walbro 190 LPH, Aeromotive FPR, K&N, 3.73's, 88K miles
'88 TC Smile Walbro 255HP, Stinger FMIC, PIT BOV, Pro 5.0, Kirban, RR cam, FRPP strut tower brace, T3
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88birdmobile Offline
Member
#5
well when I put the vam in the door didn't feel like it was sticking and the tension should be correct because it didn't look like it had been opened up before. As far as the turbo goes, It boosted perfect before the car sat. Also, even with it spooling slow, it doesn't make any weird noises. does this sound like a boost leak?
Thanks
88TC rebuilt a4ld, 8ua, gillis @ 17, K&N on vam, stock size exhaust(dual flowmasters and no cat), 255 walbro pump, kirban afpr, HKS SSQV blowoff valve, T5 coming soon
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Jeff K Offline
Administrator
#6
I think you are on the right track with a boost leak.

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Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 23 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 // 04 Taurus Duratec (wifes car) // 91 Topaz (daughters first 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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