North American Turbocoupe Organization



POPPING!!! ahhhhhhh
POWERED BY PSI Offline
Senior Member
#1
Hey guys, took the car out (with the oil leak) to cruz around a bit and try to get into some trouble...well...i got on it a few times(not racing just showing off!!) with my buddy in the car...and when i kick it, and the boost comes in...it comes in hard...but right at about 4000 rpm...the thing wants to "pop" and it feels like its loosing power for that one instant...after it does it a few times...it goes right along fine(about 5200 rpms its cleared out). i was thinking it was Detonation...but
1-i have my knock sensor in
2-since my car has that stupid vacuum problem i am only boosting about 15 psi when this happens
3-i run 93 octane ALWAYS
4-i have run alot more boost with out trouble.
This car is beginning to become a problem...big problem. if this is detonation...why is it happening now and not before when i ran 18-20 psi CONSTANTLY? Could it have something to do with my oil leak or my boost problem?(i have the gillis valve ALL the way screwed down at FULL BOOST and i am still only getting 18..then it drops to 15 psi) whats going on? any ideas?
Thanks
Zach
85 Turbocoupe. 5-speed.
Mods- single 2.5 inch exaust with highflow cat and Apex bullit muffler, Saab 9000 front mount IC,Centerforce II clutch kit, Gillis BV set at 19psi,K&N on VAM, Hurst shorthrow shifter.
BEST ET-(1/8)-9.7 @71.9 mph
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Dan E Offline
Posting Freak
#2
Mine did that exact thing when my VAM was bad...

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Dan Eaves
88TC 5spd, Crower 5.5" Sportsman Rods, Short Wiseco Pistons bored .030" Over, Ported Head with Polished Combustion Chambers, Gutted & Polished Upper, Ported & Polished Lower, Polished T/B, Ported E6, SVO T3 .63AR Turbo, Bosch Bypass Valve, 3" DP w/No Cat, 2 1/2" DynoMax single cat back w/DynoMax Super Turbo Muffler, RR Cam, K&N in Fenderwell, Gillis Boost Valve, Centerforce I Clutch, Removed A/C, Polished Wheels, Polished Valve Cover, Polished Crank and W/P Pulleys, Walbro 255LPH HP Pump, Kirban Adj FPR, and the DAMN Heater Core is new too !

http://www.geocities.com/wot_turbo/WOT.html

NATO MEMBER (Vice Chairman...if it's a vice...I deal with it)
Dan Eaves
88TC 5spd Vermillion Red, Polished...everything...
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POWERED BY PSI Offline
Senior Member
#3
hey guys...wow...i am an idiot...i found out why i was lossing boost and why my car was poping!!! the damn Spark plug wire came about half way off!!!!put it back on, took it out...got all my power back and my boost stays right where it is supposed to instead of fluxuating!!! lol, duh...anyway, thanks for your help!! sorry for the stupidity...just took some time to look over the engine and in the 1st 5 seconds...thats what i found!!! i wish every problem could be that easy to fix!!!!
Later guys
Zach
85 Turbocoupe. 5-speed.
Mods- single 2.5 inch exaust with highflow cat and Apex bullit muffler, Saab 9000 front mount IC,Centerforce II clutch kit, Gillis BV set at 19psi,K&N on VAM, Hurst shorthrow shifter.
BEST ET-(1/8)-9.7 @71.9 mph
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