LS1TECH - Camaro and Firebird Forum Discussion - super chevy stock 407hp block... Are they on crack?

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super chevy stock 407hp block... Are they on crack?

Quote:

Equipped with the stock cam and run with the stock street rod ECU supplied by GMPP, the LS1 immediately fired to life and posted some pretty impressive power numbers. Originally rated at 320hp (full accessories and exhaust), our LS1 produced 407 hp at 5,500 rpm and 409 lbs.-ft. at 5,000 rpm. The motor produced more than 350 lbs.-ft. of torque from 3,000 rpm to 6,000 rpm and over 375 lbs.-ft. from 3,000 rpm to 5,600 rpm.

Sounds about right. They tested it through open headers and with an electric water pump and no other accessories. Considering the Corvette LS1 was rated at 350 in the car with all accessories and the stock exhaust, and that they are essentially the same, 400+ seems about right for a magazine dyno test.

Yup no matter what the engine it will always put out higher numbers on an engine dyno; due to lack of accessories and no drivetrain loss

I thought the same thing when I first read it. Had the motor been in a car, I think the numbers would have been more like we would have expected.

also remember,the magazines usually show a STP correction factor instead of the sticter SAE correction that the OEMs use.

Ahhh, okay, crank horsepower, thats what I missed :judge: , lol, thanks. :)