Turbo LS1 smokes after WOT pulls
02-16-2016, 06:00 PM
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Staging Lane
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Turbo LS1 smokes after WOT pulls Hello, I have a 2000 Camaro SS 6 speed with a turbonetics t76 @ 8psi on 93 octane. It is a stock ls1, down to the head bolts, gaskets, and valve springs. It runs strong and smooth overall, but I do believe the tune could be a little better, I do not tune cars, previous owner had it dyno tuned by a local shop. My problem is after a decent pull, white/grey smoke is visible coming out of the back. Could a bad tune cause this? It also has a noticeable backfire after letting off from more than 2500-3000 rpm. If not a tuning problem, what else could it be? Turbo feed/drain line leaking? I've thought maybe rings, or could it be lifting the heads? The only reason I can't imagine it being anything that serious is because of how strong it runs. I am by no means a tuning expert, or expert mechanic, so I'm reaching out. Any info would be appreciated. Thanks, Logan.
02-16-2016, 06:08 PM
#2
Might want to take it to the shop that tuned it, if not find someone that has hptuners that can datalog some runs to verify timing, fuel, etc.. All vitals
Any trouble codes?
I would start by visually looking under the car while started and see if you can pin point any leaks .
Compression/leak down test to verify ring seal and/or head gasket sealing
Do you have an AFR gauge? How are you monitoring the cars vital stats?
Any trouble codes?
I would start by visually looking under the car while started and see if you can pin point any leaks .
Compression/leak down test to verify ring seal and/or head gasket sealing
Do you have an AFR gauge? How are you monitoring the cars vital stats?
02-16-2016, 06:21 PM
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Staging Lane
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Might want to take it to the shop that tuned it, if not find someone that has hptuners that can datalog some runs to verify timing, fuel, etc.. All vitals
Any trouble codes?
I would start by visually looking under the car while started and see if you can pin point any leaks .
Compression/leak down test to verify ring seal and/or head gasket sealing
Do you have an AFR gauge? How are you monitoring the cars vital stats?
Any trouble codes?
I would start by visually looking under the car while started and see if you can pin point any leaks .
Compression/leak down test to verify ring seal and/or head gasket sealing
Do you have an AFR gauge? How are you monitoring the cars vital stats?
02-16-2016, 07:07 PM
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Staging Lane
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Honestly, I'm not for sure. The first time I noticed it is when I let my dad take it for a spin one day, and saw it in the mirror. I agree, I was hoping for a simple stupid fix, but the best thing would be to take it to the experts. Thanks for the help!
02-16-2016, 07:21 PM
#6
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Backfire is normal with a turbo car with a free flow exhaust. My car does it half the time I do a pull and let off the gas. If it's running smooth, I wouldn't worry too much about the smoke...it is a turbo car after all and they are known to get some smoking on pulls and braking sometimes. I'd simply pull the dipstick and check the oil, take a peak into the radiator and coolant tank, etc. Just give the basics a once over. If all looks good there, pop off the oil fill cap while the engine is running and make sure compression isn't blowing out. If that checks out, run her.
One other thing to keep in mind is the angle of your oil drain line. If it's a shitty angle, when the engine is revving and your making a lot of oil pressure, the turbo may not be able to drain it quick enough so you'll get some burn off in the exhaust. Not a huge deal.
One other thing to keep in mind is the angle of your oil drain line. If it's a shitty angle, when the engine is revving and your making a lot of oil pressure, the turbo may not be able to drain it quick enough so you'll get some burn off in the exhaust. Not a huge deal.
02-17-2016, 04:36 PM
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Backfire is normal with a turbo car with a free flow exhaust. My car does it half the time I do a pull and let off the gas. If it's running smooth, I wouldn't worry too much about the smoke...it is a turbo car after all and they are known to get some smoking on pulls and braking sometimes. I'd simply pull the dipstick and check the oil, take a peak into the radiator and coolant tank, etc. Just give the basics a once over. If all looks good there, pop off the oil fill cap while the engine is running and make sure compression isn't blowing out. If that checks out, run her.
One other thing to keep in mind is the angle of your oil drain line. If it's a shitty angle, when the engine is revving and your making a lot of oil pressure, the turbo may not be able to drain it quick enough so you'll get some burn off in the exhaust. Not a huge deal.
One other thing to keep in mind is the angle of your oil drain line. If it's a shitty angle, when the engine is revving and your making a lot of oil pressure, the turbo may not be able to drain it quick enough so you'll get some burn off in the exhaust. Not a huge deal.
