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cj847 · 12-09-2022, 12:13 PM

Search Richard Holdener on U tube. He has 400, 500, 600 hp tests. RWHP will be 75-100 less than engine HP.
My criticism of him is all of his test is on engine dyno. That means the engine is not running any accessories (ie no alternator, no water pump, no power steering pump, no AC, etc). For example an LQ4 is 330hp factory rated, but on his dyno it is 395-400 hp bone stock with just headers.

I built am LM7 with a cam, springs, headers, stall converter and tune. It should have been about 400hp but I never had it checked. NOTE: literally all of the gain was above 4500rpm.

12-09-2022, 12:13 PM	#3
cj847 Registered User Join Date: Sep 2016 Location: Ft Smith, AR Posts: 543	Re: LM7 5.3 build question... Search Richard Holdener on U tube. He has 400, 500, 600 hp tests. RWHP will be 75-100 less than engine HP. My criticism of him is all of his test is on engine dyno. That means the engine is not running any accessories (ie no alternator, no water pump, no power steering pump, no AC, etc). For example an LQ4 is 330hp factory rated, but on his dyno it is 395-400 hp bone stock with just headers. I built am LM7 with a cam, springs, headers, stall converter and tune. It should have been about 400hp but I never had it checked. NOTE: literally all of the gain was above 4500rpm.