Article: Building 630 HP out of a Merc 502 - Intake Manifold article

[RiverDave]

You can view the page at http://www.riverdavesplace.com/forums/content.php?360-Building-630-HP-out-of-a-Merc-502-Intake-Manifold-article

 

[28Eliminator]

Are those heads the 088 castings? if so, did you go to a smaller (11/32") valve stem/guide? or retain the stock valve dimensions?

Those are good looking torque numbers.

 

[BDMar]

Yes they are 088 heads and we did bush the guides for 11/32 valves. Also the intake valves are now 2.250

 

[OGShocker]

Great read, Brian!

 

[Tommy Gun Images]

Awesome article Brian! I can attest that Brian doesn't baby these things. I've never been in his boat when all we did was cruise!

 

[sirbob]

How different is the new (current) Merc 502 HO and could the same be done on that motor?

BTW - running though cats.

Or is it apples and oranges?

Thx