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Old 01-28-2025, 06:17 PM   #6
GUMP
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Join Date: May 2002
Location: Shelby, NC
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Default Re: Latest NHRA Engine HP and Engine Parts updates

Quote:
Originally Posted by Larry Hill View Post
On the 376/ 385 Direct Injection engine the dome was changed from .045? high with a volume of 4.0 cc to a .060? dome height with a volume of 4.1 cc.

I wonder how many times they had to pour to arrive at the .015? taller dome only displacing .1cc more volume.

Maybe NHRA has a portable climate controlled room maintaining a standard temperature.
The dome shape is different on the stock piston when compared to the COPO piston. My factory installed pistons would have failed....

The head is as-cast too.
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Daren Poole-Adams
NHRA Stock/SS 2007
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