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Old 11-23-2011, 05:24 PM
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1976 Trans Am 455

I have a 1976 Trans Am with a 1974 455 engine in it. What is a good way to get more horsepower without having to tear into the engine to much?

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Old 11-23-2011, 05:38 PM
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Work on an ignition curve (initial advance and the mechanical advance rate) that it likes. That will be worth something.

If you want to tear into the front of the engine get a good quality timing set to advance the camshaft timing from where the smogger timing gears have likely got it sitting now. It may be due for a replacement anyway.

Cut open the 'shaker' hood scoop (if it's not already functional) so that it breathes cold air in the summer. Worth a heap on a big mill like that.

Read Doug Roe's book on the Rochester Quadrajet and tune one to his specs... You'll be happy with it without tearing deep into the engine.
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Old 11-23-2011, 07:28 PM
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Quote:
Originally Posted by jeffysit455
I have a 1976 Trans Am with a 1974 455 engine in it. What is a good way to get more horsepower without having to tear into the engine to much?
The best thing that you can do, as well as a distributor recurve, is put in a decent set of headers, then tune the carburator to match the improved exhaust flow. For best acceleration, a gear change might be in order, depending on the gears that you have now.
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