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#1
12-22-2002, 02:35 AM
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Re: Curious!
Actually, the ZL-1 was rated at 430hp from the factory, which was GROSS horsepower. NET horsepower they were probably 370-380...somewhere in that neighborhood. I would say both of those numbers are a bit conservative. Oh, I looked up the GM dyno test, and it was in the 530hp neighborhood with headers. But, more is easily attainable!
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#2
12-24-2002, 12:42 AM
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Re: Curious!
I have a 1970 Chevrolet engines Dyno test catalog.
I know we'd all like to think Chevrolet was conservative with the Horse Power ratings,but in it shows the graph charts and Gross Horse power specs for all the 1970 engines. It shows the LS-6 tested at 448 peak HP.Other engines from that year were around what they were advertised or less on their respective Air Cleaner labels. These were engines with Exhaust manifolds as delivered into the car.
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#3
12-24-2002, 01:47 PM
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Re: Curious!
Mr70,
I have heard that Chevy used horsepower and torque numbers that occurred at less than peak RPM, producing more conservative numbers that they could still claim were accurate. Does your data include the RPM at which the horsepower and torque were produced? -Sam
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