Gears and converter question
Building a 355 for my wife's 86 trans am that she blew up, the kit Im using is calling for a 3000 stall. Most converters I see are 3000-3500 stall speed, the rear has some pretty tall gears, I believe that they are 2:73. I plan on swapping the rear with a stock 10 bolt with 3:42 gears from a formula parts car that I have. What effect will either sets of gears have on the stall speed of the converter. What would happen if I just used the stock converter? I plan on t56 swapping it later on just want the car to run decent, not going to be raced much if at all.
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If there's a larger cam, it may push with a stock converter.
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Steeper gears will load the converter a lot more than proper gears would.
Whats your redline and where is peak HP predicted? |
Motor is a 10:1 355 with an edelbrock top end kit max rpm is 6500 so im assuming that the peak would be close maybe 6000-6200. Im not looking for fastest times or anything just trying to make a decent driving car, it will hardly be raced. Dont want to swap the motor then have it be un-driveable because of the stock converter and gears.
http://www.jegs.com/i/Edelbrock/350/2098/10002/-1 Cam Spec http://www.jegs.com/i/JEGS+Performan.../7102/10002/-1 |
Honestly? Run a smaller cam. You'll be happier with the way it drives on the street. Consider a hydraulic roller if it's in the budget; less chances of issues with lobe wiping with the currently available engine oil.
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Here's the thing:
If he's stuck running the stock converter and gears with the motor as is, it'll drive like crap. Won't idle worth a damn, no vacuum for brakes, pushing at idle, etc. If there's no budget for a converter and gear swap, a different cam is a cheaper alternative to keep the car driveable and fun. |
Picked up a tci 3000-3500 stall with lockup. Only thing left is to swap the engine...
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