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#1
03-13-2005, 10:11 PM
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smoke when shifting
i have recently rebuilt a 1990 350 tbi. it has about 285 hp, and after 3,000 miles i was racing someone and he told me everytime i shift that it would puff some smoke. so i was just wondering if this was normal for a slightly hi-po motor. its just a small puff, when you start the truck it does not smoke and you can rev the motor to as many rpm's as you wnat without smoke.
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#2
03-13-2005, 11:56 PM
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Re: smoke when shifting
What color smoke? blueish white is oil, white is antifreze, black is gas. If it's black, it's just the extra gas in the throttle body slightly flooding the cylinders when the speed suddenly drops. Sounds like you won tho, if he saw the smoke
 Also, did you confirm the smoke? Maybe he wanted you to have to tear into your truck chasing nothing.
__________________
'04 Cavalier coupe M/T 2.2 Ecotec Supercharged 14 PSI boost, charge air cooler, 42# injectors Tuned with HP Tuners Poly engine/trans/control arm bushings Self built and self programmed progressive methanol injection system
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#3
03-14-2005, 12:56 AM
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Re: smoke when shifting
Probably the valve stem seals. That's a sure sign of them being bad (if its oil smoke that is).
__________________
**1966 Chevy II**  355 SBC, Turbo 400, 5.13 gear, IHRA Certified to 8.50 in the 1/4 Last Race (10-6-07) So its been awhile... Dial: 6.77, RT: -.0001, 60': 1.4360, 1/8th: 6.7942 @ 100.65 mph Fastest Pass of '07 (10-6-07) 60': 1.4360, 330': 4.3453, 1/8th: 6.7942 @ 100.65 mph 25 and in BIG TIME Debt Crew member #2  Deuce's Wild Racing: Take a Ride on the WILD SIDE 
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#4
03-14-2005, 08:55 AM
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smoke when shifting
it is white and only when you shift at high rpm's. what makes me mad, is the fresh rebuild part.
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