True HP ratings for old big blocks!!!
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True HP ratings for old big blocks!!!
Posted: May 09 2008 11:25 AM
 
BigAl Breland (aka BigAlBre) [ View ] [ Email ] [ Car Ads ] [ Blogs ]
St Pete Beach, Florida
(866) 787-6337
 Big Al sittin back in paradise.
 
From my friend Mike Kruze......


Subject: Old big blocks.....



Subject: Interesting info. about the old big block engines.



I thought you guys might be interested in the following info. from when I was watching American Muscle Car.



They took 5 engines from the 1960's and dyno tested them as to their true horsepower compared to the factory rated h.p.

Any work done to the engines had to be to factory specs, using only factory available parts from that era. The only modification allowed was the engines could be bored .060 over stock and they still had to use factory available pistons.



Engine: Factory rated h.p: Tested h.p: Tested torque:



Chevy 409 409 406 430



Pontiac 421 405 488 470



Chevy 427, L88 Rat. 425 527 501



Ford 427 425 637 554



Chrysler Hemi 426 425(A joke) 820 689





That 820 h.p. for the hemi. I guess that's why no one could beat them in a street drag race.
 
 
Comments
 
Posted by BigAlBre  -  05/09/2008 11:25 AM
Subject: Old big blocks.....



Subject: Interesting info. about the old big block engines.



I thought you guys might be interested in the following info. from when I was watching American Muscle Car.



They took 5 engines from the 1960's and dyno tested them as to their true horsepower compared to the factory rated h.p.

Any work done to the engines had to be to factory specs, using only factory available parts from that era. The only modification allowed was the engines could be bored .060 over stock and they still had to use factory available pistons.



Engine: Factory rated h.p: Tested h.p: Tested torque:



Chevy 409 409 406 430



Pontiac 421 405 488 470



Chevy 427, L88 Rat. 425 527 501



Ford 427 425 637 554



Chrysler Hemi 426 425 ( A joke ) 820 689





That 820 h.p. for the hemi. I guess that's why no one could beat them in a street drag race.
Big Al sittin back in paradise. [ View ] [ Email ] [ Blogs ] [ Car Ads ] St Pete Beach, Florida Charter Member since June 1999
 
Posted by Tony57  -  05/09/2008 01:16 PM
Heres something i found on the net. http://www.earlham.edu/%7ebyersjo/top50.htm
Tony57 [ View ] [ Email ] [ Blogs ] [ Car Ads ] Hillsboro, Missouri
 
Posted by DaveHughes  -  05/09/2008 01:52 PM
thats some cool info- I always heard they were way underated but I had no idea that much.
DaveHughes [ View ] [ Email ] [ Blogs ] [ Car Ads ] seaman, Ohio
 
Posted by koolstuff0099  -  05/10/2008 11:30 AM
Hmmmmmm............that explains why the L-88 crate motor I bought years ago went so gooood! I had to pull the stock cam out a replace it because it was TOO radical.......the good ole days
B-Dog [ View ] [ Email ] [ Blogs ] [ Car Ads ] Newburyport, Massachusetts
 
Posted by tlp1968  -  05/12/2008 12:46 PM
I guess this means I better stay away from my cousin with the 427.
StreetRodding.com Marketing Director [ View ] [ Email ] [ Blogs ] [ Car Ads ] Springfield,, Illinois
 
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