Latest NHRA Engine HP and Engine Parts updates

[GUMP]

Originally Posted by Larry Hill

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.