How does GM put a HP rating on there engines?
Thread Starter
TECH Regular
Joined: Dec 2008
Posts: 418
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From: New York, NY
How does GM put a HP rating on there engines? So I'm looking to get the LS376/480 crate. But I want to know from a techical stand point that if this crate is rated at 480hp. What dyno test was done to achieve that? Was it dynoed with long tube headers? Were there accessories involved? I think is a great platform to start especially on a budget. So I would like to hear from sponsors and techs!
Our baseline horsepower and torque ratings are based on testing with the
production-style, normally aspirated injection system. There’s no telling
how much power you can realize with a carefully tuned turbo or supercharger
system!
See page 286 for information on our reference guide P/N 88959384 for installing
This statement is directly out of the GMPP 10 catalog. I think they test them with factory manifolds and stock accsy. such as the water pump and alt. I doubt they have power steering pump or ac compressor on them. Its a bad little motor. I want the 454 crate for my HD truck.
production-style, normally aspirated injection system. There’s no telling
how much power you can realize with a carefully tuned turbo or supercharger
system!
See page 286 for information on our reference guide P/N 88959384 for installing
This statement is directly out of the GMPP 10 catalog. I think they test them with factory manifolds and stock accsy. such as the water pump and alt. I doubt they have power steering pump or ac compressor on them. Its a bad little motor. I want the 454 crate for my HD truck.
