Re: Question on 350 sbc omc 800 build
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Originally Posted by
Priesman64
Rick thank you for the reply. I’ve actually got 2 set of pistons that I can use on this block. The set that was in it was the full dish piston. The ones I have available are flattop with 4 reliefs in them.
Fl
at tops with the 76cc chambers will give you a suitable static compression ratio. Better yet, single valve relief flat tops.
Bring your quench dimension down to approx .038".
Replacement for mercruiser I had bought awhile ago. As for the omc I am well aware of the issues they can bring. Since I’ve posted this I’ve came across some mercruiser heads and will be running those. They are the 624 castings which I know have a bad rap for cracking but the gm part number is different from the mercruiser ones and from what I can tell the castings are different as well so I’m gonna try them. 76cc chambers with 2.02 and 1.6. Should be much better than the 58cc heads.
Yes, the 58cc chambers would bring the static c/r up higher than what would work well for the Marine version 5.7L.
Here is an easy way to determine Light -vs- Heavy castings:
I am leaning a different direction on cams now because I’ve read some horror stories about comp.
Rick ... aka Ricardo..... AQ series Volvo Penta repair
Portland, Oregon
28' SDN F/B w/ twin Volvo Penta 5.7L DP drives
"Intellectual growth should commence at birth and cease only at death." Albert Einstein
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