Quote:
Originally Posted by footjoy
When people talk about a good tune which my car needs, how much horsepower can be gained by a good tune?
Thanks
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That depends on how far it is off to begin with. By tweaking timing and jetting, I rarely find LESS than 10rwhp on cars I've tuned. 20-30 is pretty common. I've found over 60 a few times.
Mild cam, mild compression, small valves,.... based upon other Pontiacs I've dyno tested, you may have another 15 or so HP. Nearly every stock headed Pontiac I've seen on a chassis dyno has put less than 300hp to the wheels.
What is your torque, though? People focusing on HP with Pontiacs running unported heads, they are studying the wrong end of the dog.
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'73 T/A (sold). Low budget stock headed 8.3:1 455, 222/242 116lsa .443/.435 cam. FAST Sportsman EFI, 317rwhp/385rwtq on 87 octane. 13.12 @103.2, 1.91 60'.
'67 Firebird [sold], ; 11.27 @ 119.61, 7.167 @ 96.07, with UD 280/280 (108LSA/ 109 ICL)solid cam. [1.537, 7.233 @93.61, 11.46 @ 115.4 w/ old UD 288/296 108 hydraulic cam] Feb '05 HPP, home-ported "16" D-ports, dished pistons (pump gas only), 3.42 gears, 275/60 DR's, 750DP, T2, full exhaust
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