mercruiser that is.
mercruiser that is.
once you let us know what heads, pistons, intake, carb, comp ratio, and rpm expectation you want, then maybe you can be assisted..
cam choice is the LAST thing to choose
otherwise your into a catalog masturbation of trial and error, and never getting there
there is nothing out there that will take that setup to 500 hp
sorry
425 hp max and the bottom end will blow..
your engine has weak rods,3/8 to be exact and wont support 500 hp..
isky 396271/281-14 cam
find a set of pre 70's oval port closed chamber heads to raise the compression
3856206 65 396 heads with 97 cc chambers
3909802 67 396 with 101 cc chambers
edelbrock air gap
holly marine hp 750 cfm carb
and scorpion roller rockers
this combo will give you 425 hp with tons of torque but like i said your bottom end is limiting you to get 500 hp with out strokeing the engine to a 489..
i heard the slugs are the weakest link.
sweet cam by the way!
i was running an isky 280 in my olds over 20 years ago.
Last edited by Donzi_Dude; 06-05-2011 at 04:22 PM.
We assume you are talking about small peanut port Hi-torque stock 330 heads ?
They will greatly limit your horspower because of their low flow capacity .
"BENCHSEAT 18" ~~YellowJacket~~ project owner~
1929 Chris~Craft 28' Tripple Cockpit Mahogany Speedboat / A-120-A 845 Cu.In. 375 H.P. Chris~Craft V-8 racing engine.
24' American Skier
Super Eagle 454 HO Skiboat
1991 454 SS Chevy Super Sport Pick-up for towing my "Toys".
There is no such thing as going too fast ~ ~~
OR~ Being too old~ for a new "Toy"!
Brad Hunter
Huntingdon Valley Pa (Just outside Philly)~
Ocean City NJ
silverghost1926@msn.com
215 947 4676 (PA Home)
I gotta ask......
Why would you bother when there're so many 502's and other more "correct" engines around?
George Carter
Central Florida
gcarter763@aol.com
http://kineticocentralfl.com/
“If you have to argue your science by using fraud, your science is not valid"
Professor Ian Plimer, Adilaide and Melbourne Universities
Some of the 330's had 2 bolt mains. worth checking that first.
The MK IV 4 bolt man bearing cap blocks have the words HI PERF PASS cast in large letters on the left side in fr'ont of the oil filter boss ara on the left side of the crankcase.
2 bolt main cap blocks do not have this marking.
"BENCHSEAT 18" ~~YellowJacket~~ project owner~
1929 Chris~Craft 28' Tripple Cockpit Mahogany Speedboat / A-120-A 845 Cu.In. 375 H.P. Chris~Craft V-8 racing engine.
24' American Skier
Super Eagle 454 HO Skiboat
1991 454 SS Chevy Super Sport Pick-up for towing my "Toys".
There is no such thing as going too fast ~ ~~
OR~ Being too old~ for a new "Toy"!
Brad Hunter
Huntingdon Valley Pa (Just outside Philly)~
Ocean City NJ
silverghost1926@msn.com
215 947 4676 (PA Home)
"1978" F-22; Turbo'd & Intercooled.
There are currently 1 users browsing this thread. (0 members and 1 guests)