LT4 horsepower
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Joined: Dec 2002
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From: SCMR Rat Pack'r Charter Member..Great Bend KS
Originally Posted by Paul Workman
(in effect) Dyno tests of 125 LT4s resulted in the following stats (credited to by Stan Adelman of Auto Performance Test Lab in Atlanta, GA.):
Less than 25% of (LT4s) dynoed <345hp,
about 15% fell into the 360 to 375hp range,
about 10% between 375 and 385hp,
2% hit low 390s hp
Less than 25% of (LT4s) dynoed <345hp,
about 15% fell into the 360 to 375hp range,
about 10% between 375 and 385hp,
2% hit low 390s hp
I do know this: at a dyno day two years ago, my stock LT4 turned up 311rwhp. A friend's 2001 LS1 (factory rated at 350hp), also stock, ran a 316rwhp a few minutes before my runs. His car is an M6, so the losses should be comparable.
Soooo, if the factory rating for his LS1 is accurate, at 350, then my particular LT4 should be around 345. Either that or his LS is actually puting out only 335!!!
But an LT4 actually producing 360-390hp??? I'm skeptical.
Larry
code5coupe
Last edited by rocco16; Oct 7, 2005 at 01:30 PM.
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Joined: Feb 2005
Posts: 513
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From: Go Dawgs!
Originally Posted by rocco16
The problem with these figures is that the dynos were chassis dynos and the cshp figures quoted are Estimates, taken from rwhp.
I do know this: at a dyno day two years ago, my stock LT4 turned up 311rwhp. Then my particular LT4 should be around 345.
But an LT4 actually producing 360-390hp??? I'm skeptical.
Larry
code5coupe
I do know this: at a dyno day two years ago, my stock LT4 turned up 311rwhp. Then my particular LT4 should be around 345.
But an LT4 actually producing 360-390hp??? I'm skeptical.
Larry
code5coupe
at 15% loss
Your 311RW is equal to 85% of C/FW HP
311 divided by .85 equals ~365.9 CHP-
NOT 345!
~365.9 CHP
Still skeptical???
