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Topic: 390/500..real or underrated?

in Forum: C3 Engines


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390/500..real or underrated?

Posted: 4/13/08 12:15pm Message 1 of 3
Fairlane514
Former Member
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Houston, TX - USA
Joined: 2/7/2008
Posts: 93
Vette(s): 1970 454 4 speed A/C power everything else
Does anyone know if the 1970 454 was actually 390 hp/500 ft lbs, or higher?

Thanks!


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390/500..real or underrated?

Posted: 4/14/08 9:54am Message 2 of 3
VetteSpecialties
Former Member
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Mounds View, MN - USA
Joined: 5/24/2007
Posts: 1031
Vette(s): 70 LT1 coupe, 69 350 HP coupe, 69 390HP 427 coupe, 71 LS5 convert, 85 coupe, 93 coupe
Chev rated it at 390 HP at 4800 RPM, and 500 ftlb at 3400 RPM.

Larry



390/500..real or underrated?

Posted: 4/15/08 5:11am Message 3 of 3
6880Mike
Former Member
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Horse Cave, KY - USA
Joined: 10/22/2007
Posts: 488
Vette(s): 1968 convertible; 1980 L-82
Probably was.  After '70, GM began deliberately underrating HP figures for consumer insurance purposes, eventually went to net figures, and began addin smog equipment.
 
Smile



in Forum: C3 Engines


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