pro charged lt1 stock bottom end
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I had a d1sc on a stock 93 lt1 and was running 8 psi, made 450 rwhp. Ran good for 2 thousand miles, then performance started to suffer. Did a leak down test and 2 cyclinders showed lowered compression (cant remember how much PSI showed in those cylinders)
Pulled the engine and the ring lands looked ok, but was getting blow by. Had a pretty rich tuned on the safe side, but I would say the majority of boosted stock bottom end lt1s out there end up rebuilding at some point.
Pulled the engine and the ring lands looked ok, but was getting blow by. Had a pretty rich tuned on the safe side, but I would say the majority of boosted stock bottom end lt1s out there end up rebuilding at some point.
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I had a d1sc on a stock 93 lt1 and was running 8 psi, made 450 rwhp. Ran good for 2 thousand miles, then performance started to suffer. Did a leak down test and 2 cyclinders showed lowered compression (cant remember how much PSI showed in those cylinders)
Pulled the engine and the ring lands looked ok, but was getting blow by. Had a pretty rich tuned on the safe side, but I would say the majority of boosted stock bottom end lt1s out there end up rebuilding at some point.
Pulled the engine and the ring lands looked ok, but was getting blow by. Had a pretty rich tuned on the safe side, but I would say the majority of boosted stock bottom end lt1s out there end up rebuilding at some point.
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I put 45,000 miles on my 96 Impala with 10 psi Vortech kit on. I never did blow the motor. I pulled it, too make it faster. The LT1 cast piston is the problem. Its only a matter of time before you break the ring lands. I think I got very lucky.
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BTW the stock engine had about 60,000 when I put the blower on. The ring lands never broke, the rings couldnt keep up with the cylinder pressures.
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theres a car i think im going to get, its a 97 z and has a twin cooled pro charger. the car has 56k on it and its only had the pro charger for about 4k miles. said with 5psi it mad 467 rwhp , has cam and heads have been worked, headers, x pipe. so i could probably bump it up to 8psi and be good for a while.
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At 4 psi, it will live forever with a conservative tune. Anything above that and the pistons just won't take it for any extended period of time. Though, a while back some guy claimed he was running 12 psi on the stock bottom-end and it lived for a while. However, his dyno and track times were also very fishy too, so I wouldn't count on yours doing that too.
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Been at 9psi for awhile but mostly track time.
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95 Pontiac Formula- Stock engine with ATI Procharger, Moser 12 bolt w/4:30 gears, Rossler trans, Neil Chance 4000 stall, M/T ET streets, 10.914@ 121.90mph, 1.452 60ft. GMHTP November 2010 Feature Car. Check it out at:
https://www.motortrend.com/features/...ebird-formula/
http://www.youtube.com/watch?v=abZ1z...ature=youtu.be
95 Pontiac Formula- Stock engine with ATI Procharger, Moser 12 bolt w/4:30 gears, Rossler trans, Neil Chance 4000 stall, M/T ET streets, 10.914@ 121.90mph, 1.452 60ft. GMHTP November 2010 Feature Car. Check it out at:
https://www.motortrend.com/features/...ebird-formula/
http://www.youtube.com/watch?v=abZ1z...ature=youtu.be
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Jon
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95 Pontiac Formula- Stock engine with ATI Procharger, Moser 12 bolt w/4:30 gears, Rossler trans, Neil Chance 4000 stall, M/T ET streets, 10.914@ 121.90mph, 1.452 60ft. GMHTP November 2010 Feature Car. Check it out at:
https://www.motortrend.com/features/...ebird-formula/
http://www.youtube.com/watch?v=abZ1z...ature=youtu.be
95 Pontiac Formula- Stock engine with ATI Procharger, Moser 12 bolt w/4:30 gears, Rossler trans, Neil Chance 4000 stall, M/T ET streets, 10.914@ 121.90mph, 1.452 60ft. GMHTP November 2010 Feature Car. Check it out at:
https://www.motortrend.com/features/...ebird-formula/
http://www.youtube.com/watch?v=abZ1z...ature=youtu.be