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Has anyone seen a torque and horsepower vs. rpm curve for a 302? I have searched and can not find one. Just curious.

Gary
 

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I have a copy of one using the Cross-Ram and the First Design Off-Road cam. It shows the engine with a stock exhaust and then with headers. With headers it had a torque peak of just over 380 ft-lbs @ 5700 RPM and a HP peak of just under 460 HP @ 7200 RPM. -WHOA!!!


You can see it in the back of the Camaro Untold Secrets book. Test was done by Traco.

-Mark.
 

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You might be able to get one from GM. If you give them your VIN, they send you a huge packet of information for your car ... free. In it is a whole bunch of specs on the various engines. I think there were curves, but I'd have to check to make sure.

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K.A. Young

67 SS 350
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AC, Deluxe Interior

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I found all of the curves (from original sales literature supposedly) for all of the production engines (from Inline 6 to L78) online once. I really wish I had bookmarked that link.
 

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I have the dyno sheets from a '68 302 built to NHRA-legal "E"-Stock specs (stock valvetrain, intake, carb, pistons, cam, etc.); pulls started at 5400, went to 7700. Peak power was 425hp @ 6800, only fell off to 419 @ 7700; don't know what peak torque was, but it was 360 lb-ft. @ 5400 and falling gradually (was 330 @ 6800, 285 @ 7700). At the factory rating point (5800) it had 353hp. This engine runs 10.99's @ 128mph in a 3300# '68 with an M-20 and 5.13 gears, and is #2 in the "E"-Stock points race so far this year; first gear is good for about ten feet, and it's turning 7800 through the lights. I don't recall ever seeing published full-range power and torque curves for a stock single 4-barrel Z/28 like this.

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JohnZ
CRG
'69 Z28 Fathom Green
 
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