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Old 09-18-2008, 10:06 AM   #1
1984Z28
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Default How much HP for stock turbo 350

I just was wondering were the horse power cut of was for the TH350 before adding after market parts. Thanks.
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Old 09-18-2008, 10:17 AM   #2
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What does the car or truck weigh? And what stall converter do you plan on utilizing?

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Old 09-18-2008, 10:58 AM   #3
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The car is a 3rd gen camaro. I am guessing around 3400 with me in it. The converter is an 8" JM performance converter. It stalls about 3500 on brake I am not sure were it flashes at. Right now I run in the neighborhood of 400 to 450 hp. It works good but next year I am looking at adding around 75 to 100 hp. So just wanting to know if it will survive. It does have the heavy duty frictions. Thanks.
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Old 09-18-2008, 11:17 AM   #4
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You're pretty close to max now if no other internal upgrades are made. If you spray it as it is now, it will be just a matter of time before it fails.

If you have the funds, upgrade to a well built 400 turbo. That way, the trans will no longer be the weak link if you decide to step up to even more spray.
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Old 09-18-2008, 10:39 PM   #5
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Quote:
Originally Posted by 1984Z28 View Post
The car is a 3rd gen camaro. I am guessing around 3400 with me in it. The converter is an 8" JM performance converter. It stalls about 3500 on brake I am not sure were it flashes at. Right now I run in the neighborhood of 400 to 450 hp. It works good but next year I am looking at adding around 75 to 100 hp. So just wanting to know if it will survive. It does have the heavy duty frictions. Thanks.
I ran a stock/standard rebuild TH350 with a TransGo manual VB kit behind a pump gas 383 SBC (~450 HP) in a 3600+lb car, 4200 stall for ~225 passes before eventually, it killed the intermediate outer race and roller clutch. Went back with extra clutches in forward and direct drums and added an ATI outer race and ran like that for a few years. Then added a BTE direct drum w/36 element sprag and have been running it behind a ~720 HP/640 lb-ft, 445 SBC, in the same (now) 3650+ lb car. The car runs 108 MPH in the 1/8th in ~2000' DA. The next time I go through it, I will probably add a HD 300M or 4340 input shaft. Current shift point is 7200 RPM. If I ever get around to putting a real set of heads on the bottom end, I will probably move to aluminum reduced diameter fwd and direct drums.

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Old 09-19-2008, 11:07 AM   #6
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Thanks for the input Guys.
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Old 10-13-2008, 08:46 PM   #7
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we run a 350 th we run 10.50s the outer race will be your weak point 3100lb camaro 5500 stall with 500rear wheel hp thats 10.50 at a 126
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