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kreed

02-11-2017 02:40 PM

525 EFI question....

Anyone know what the compression ratio is on a Merc 525EFI ? And how about the combustion chamber volume of the aluminum heads that come on the 525...
thanks....

F-2 Speedy

02-11-2017 03:45 PM

Edelbrock 315cc intake port, 110cc exhaust port, 118cc chamber. MT posted this on another thread

I think its 8.5.1 ??

BUP	02-11-2017 06:35 PM

Comp ratio is 8.75 : 1

Young Performance

02-11-2017 10:23 PM

Yep, 8.75:1. The piston volume in +1cc. The heads actually cc at about 120cc's.
Eddie

kreed

02-13-2017 06:39 AM

Thanks guys...appriciate it.

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