C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old May 7, 2009 | 05:47 PM
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Default Stall Speed

Does anyone know what the stock stall speed is for a '79?

Thanks,

Ryan
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Old May 7, 2009 | 05:50 PM
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1800-1900.
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Old May 7, 2009 | 05:58 PM
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Thanks, I have a cam(XE262h) and exhaust. I was looking at a 2400 stall. Would that be too high? The engine has a rough idle when it is in gear and I can't find any vacuum leaks. The engine also hiccups a little at about 1500 and I was thinking thats because that is where the cam kicks in. Would a high stall converter help with these symptoms?

Thanks for the help
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Old May 7, 2009 | 11:13 PM
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A good 2400 stall will not feel any different than stock. Its probably not needed though.
Cams dont really "kick in" the way you are thinking. They just have a range where they are the most efficient.
It sounds like you just have some tuning issues.
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Old May 8, 2009 | 12:41 PM
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When I first put the stroker in my '76, I had just rebuilt the trans about six months before. So I popped the motor in, and wow I've never been so disappointed! The thing just would NOT launch. Even with three times the power of the orig motor.

I went back to the trans shop & asked for advice. They recommended a 2500-2800 range stall convertor & I had them put it in. I've never looked back. Lots more mods have been done to the engine since then but man, it still launches like a bullet.

The convertor seems a bit slippery around town but it locks up by the time I'm at freeway speeds or before. When I want to launch her, I don't need to brake-torque it by holding the brakes & revving the motor up. When I say GO, it just burns rubber ... whenever I wish.

The stall convertor also makes a hard-shifting transmission that's been reprogrammed, seem to shift a bit easier. It takes some of the kick out of the 1-2 shift on my Turbo 350.
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Old May 8, 2009 | 01:47 PM
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With Driveshaft, what carb are you running? Have you hooked up a vacuum gage and checked ALL the vacuum hoses and carb base gasket.
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Old May 8, 2009 | 02:22 PM
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Originally Posted by Rambo819
The engine also hiccups a little at about 1500 and I was thinking thats because that is where the cam kicks in.
Thanks for the help
This description sounds like an ignition problem?
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