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-   -   How much horsepower for a 402 Chevrolet BB (https://classracer.com/classforum/showthread.php?t=52198)

njk53 03-12-2014 09:51 AM
How much horsepower for a 402 Chevrolet BB
 
Just curious we run a 1971 402 big block Chevrolet in our stocker and was wondering if I can get an opinion from knowlegeable engine guys. How much horsepower do you think is a reasonable number for our engine?
The achilles heel of our engine is the flat intake manifold that looks like the fuel has to run uphill at one point. We have the 820 casting cylinder head. Thanks

Bobby Lundholm 03-12-2014 10:12 AM
Re: How much horsepower for a 402 Chevrolet BB
 
Give Chris Hardy a call. He's very knowledgeable and can help you with your setup.
Plus he's in Michigan as well. 231-740-5862

Jim Hanig 03-12-2014 11:58 AM
Re: How much horsepower for a 402 Chevrolet BB
 
Quote:
Originally Posted by njk53 (Post 424113)
Just curious we run a 1971 402 big block Chevrolet in our stocker and was wondering if I can get an opinion from knowlegeable engine guys. How much horsepower do you think is a reasonable number for our engine?
The achilles heel of our engine is the flat intake manifold that looks like the fuel has to run uphill at one point. We have the 820 casting cylinder head. Thanks
Needs to make around 150 over its rating

HP HUNTER 03-12-2014 09:30 PM
Re: How much horsepower for a 402 Chevrolet BB
 
Quote:
Originally Posted by njk53 (Post 424113)
Just curious we run a 1971 402 big block Chevrolet in our stocker and was wondering if I can get an opinion from knowlegeable engine guys. How much horsepower do you think is a reasonable number for our engine?
The achilles heel of our engine is the flat intake manifold that looks like the fuel has to run uphill at one point. We have the 820 casting cylinder head. Thanks
Just guessing I would say 480. The 70 402 350 HP low rise intake makes right around 500 HP @ 6300 RPM.

countrypuppy4865 03-12-2014 10:43 PM
Re: How much horsepower for a 402 Chevrolet BB
 
470 hp would be around -.70

gtaa 03-13-2014 03:14 AM
Re: How much horsepower for a 402 Chevrolet BB
 
Get in contact with Darrel Wikle he makes all BB chebbis sing.
316-942-9500

M.Lind
D/SA 801


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