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Old August 8th, 2021, 01:34 PM
Prowbar Prowbar is offline
Join Date: Dec 2020
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Default Re: High compression pistons

Originally Posted by BobBray View Post
Yes, industrial GMC V6's and V12's had high compression pistons when set up for gaseous fuels. I believe the pistons were flat-topped compared to the truck pistons that were slightly dished. 'High Compression' in this case was a relative term, I believe they were only about 8.5 to 1. I always wondered if GMC made a higher compression piston for the 637 gas V-8. That piston had the combustion chamber built into it.
Thanks for the reply. Not sure if the 637's came as industrial engines, have not read much about them being used for industrial vehicles or pump use etc.
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