Best piston for power build

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09-20-2014, 09:03 AM

dangerous1965

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Best piston for power build

Looking for opinions on Piston design. Best that will work in an 06 running EFI. Maybe explain the difference between 04 and 04.5 design and spray patterns. THANKS!

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09-21-2014, 11:19 AM

AHolt

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There has been problems with 4.5 threw 06 motors burning pistons
and trashing their motors. Injector spraying outside bowl.
I changed to a 480 QSB marine piston, and had to change injector
tips to 03- 04 spray pattern. I think after 06 they went back to earlier
spray pattern because of the problem.

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