RGS1260

Stealthrammed 383
58MM 30IB inj Cam 503/510 224/230@ 50 112
700R4 3.73 Stall 2400? Street Tires 3600lB
How far should Igo with port work?
What should I tell the porting guy to do?
Any problem areas?
Mostly street and occasional strip use
Looking for 450-475 HP

tpi_roc

Sportsman II's are EXTREMELY rough cast, extreeeeeemely.


Problem areas would be the whole thing, they're good heads, but for that to be realized you've got to grind out all the cast, smooth the combustion chamber, and make sure to gasket match the sportsmans to the super ram, I'd suggest a Felpro 1205


Good luck

RGS1260

So dont open up the ports anymore that needed just make everything smooth and gasket match to 1205

tpi_roc

You shouldn't need to on the sprotsmans, they're 200cc intake runners, those are plenty good for a 383 if they're cleaned, with some bowl work. As far as the super ramn you can port the runners a tiny bit if you want, i wouldn't pay anybody to do it.


You should be fine, and plenty happy with the engine