03 Automatic how much power will it handle?
Thread Starter
Instructor
Joined: Apr 2007
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From: Nokomis FL
03 Automatic how much power will it handle?
A friend of mine is trying to talk me into letting him fabricate a twin-turbo set up for my C/5. My only problem is that, I don't know how much power the trany will hold up to?? I would like to put down approx 550-600 at the wheels. So will it last??
Le Mans Master
Joined: May 2006
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From: Hillsboro OR
Rodney?
If you plan on doing some hard launches with it you might also consider upgrading the rear gears with at least a hardened output shaft and a diff/trans brace.
HTH
Former Vendor
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I don't think you'll be able to expect the stock tranny to last long at all with that kind of power. While your Corvette is much lighter than my GTO, my stock 4L65E was starting to take a dump on me at 20k miles.... 17k miles after the Magnacharger was installed. The past 10k miles have included a good bit of drag racing at the tracks, cutting low 1.5 60' times. The car has been putting down around 500 rwhp for the past 10k miles and the trans wasn't willing to take much more abuse.
You power won't be as brutal down low as mine, but your 2-3 and 3-4 clutches probably aren't going to hold up for too long with that kind of torque and power. Be ready to contact Frank at Performabuilt for a nicely-built transmission if you do decide to let your buddy twin-turbo your car
You power won't be as brutal down low as mine, but your 2-3 and 3-4 clutches probably aren't going to hold up for too long with that kind of torque and power. Be ready to contact Frank at Performabuilt for a nicely-built transmission if you do decide to let your buddy twin-turbo your car
Thread Starter
Instructor
Joined: Apr 2007
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From: Nokomis FL
Point Taken!! I really appreciate all of the input. I figured it wouldn't take it. Like I said it is just so soft, and all I have now is Vararam & Bassani Mufflers. Going to explore some other options. I have the car for sale anyway??
Safety Car
Joined: Jun 2004
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From: Stoney Creek Ontario
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Burning Brakes
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From: St. Paul MN
Also remember that with a manual the weak point is the cluctch....and a good clutch isn't cheap...nor is the install trivial. Plus this is the 21st century....manual transmissions are sooooo old school. 
Rebuilding an automatic trans is pretty simple. There are a host of kits out there that can handle the kind of power you're talking about. I wouldn't worry about it. Install your turbos, when/if the transmission fails rebuild it.
Rebuilding an automatic trans is pretty simple. There are a host of kits out there that can handle the kind of power you're talking about. I wouldn't worry about it. Install your turbos, when/if the transmission fails rebuild it.
Le Mans Master
Joined: Jun 2006
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From: Wichita KS
Also remember that with a manual the weak point is the cluctch....and a good clutch isn't cheap...nor is the install trivial. Plus this is the 21st century....manual transmissions are sooooo old school.
Rebuilding an automatic trans is pretty simple. There are a host of kits out there that can handle the kind of power you're talking about. I wouldn't worry about it. Install your turbos, when/if the transmission fails rebuild it.
Rebuilding an automatic trans is pretty simple. There are a host of kits out there that can handle the kind of power you're talking about. I wouldn't worry about it. Install your turbos, when/if the transmission fails rebuild it.
Auto trans are not something I would EVER rebuild and I have had every bit of my car apart along with my buddies C6 (stall, clutch, heads, cam, you name it).
A good clutch is cheap ($400) and they are not all that bad to change out.
