L76 power curve
#2
Burning Brakes
I had my motor rebuilt stock. Attached is the dyno sheet.
http://forums.corvetteforum.com/atta...dyno-sheet.pdf
http://forums.corvetteforum.com/atta...dyno-sheet.pdf
#3
Melting Slicks
I had my motor rebuilt stock. Attached is the dyno sheet.
http://forums.corvetteforum.com/atta...dyno-sheet.pdf
http://forums.corvetteforum.com/atta...dyno-sheet.pdf
#6
Team Owner
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#7
Tech Contributor
Correct. In 1965 the L76 made 365 Hp at 6200 RPM, and 350 lb-ft of torque at 4000 RPM.
I have a factory engine dyno graph in a 1965 Corvette Specifications document, produced by GM in September of 1964. I can scan it tomorrow if someone else hasn't posted the chart by then.
I have a factory engine dyno graph in a 1965 Corvette Specifications document, produced by GM in September of 1964. I can scan it tomorrow if someone else hasn't posted the chart by then.
#8
Melting Slicks
What does 370 on an engine dyno equate to in the chassis?
About 320? 260?
About 320? 260?
Last edited by DucatiDon; 05-19-2013 at 11:11 PM.
#12
Race Director
#13
Race Director
That cam and engine will make excellent power through 7000 RPM. But the stock rods and valvetrain may have issues on an older engine. I would not attempt on your car without better understanding the car's history.
In a modified 1969 Z28 302 cid engine (basically same engine with a shorter stroke) we routinely ran to 7000-7500 RPM on the street with no issues. Made great power all the way. Had a 4:88 rear gear to help it wind up.
A good set of 4 tube headers with low restriction mufflers are needed to get the maximum out of this cam on this engine.
Larry
In a modified 1969 Z28 302 cid engine (basically same engine with a shorter stroke) we routinely ran to 7000-7500 RPM on the street with no issues. Made great power all the way. Had a 4:88 rear gear to help it wind up.
A good set of 4 tube headers with low restriction mufflers are needed to get the maximum out of this cam on this engine.
Larry
#14
Safety Car
Deduct another 0% - 15% for equipment deviation from "as installed" configuration.
#15
Race Director
That's true depending on how the engine was equipped while on the lab dyno. Normally, lab dyno tests with headers feeding low restriction mufflers. Other items like inlet airfoils instead of air cleaner, lack of alternator and power steering accessories might produce numbers somewhere between the old gross and more accurate net numbers.
Deduct another 0% - 15% for equipment deviation from "as installed" configuration.
Deduct another 0% - 15% for equipment deviation from "as installed" configuration.
The factory also frequently played games with the published HP numbers to help out the marketing folks or the factory sponsored racing groups.
Larry