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Author Topic:   Porting Double Hump Heads
strstckracer
Dirt Roller

Total posts: 23
posted March 06, 2005 10:13 PM  
How big can you port the intake and axhaust runners on a double hump head? Can they get as big as a Sportman II?

Racer111
Dirt Freak

Total posts: 259
posted March 07, 2005 05:02 PM  
Porting without a flow bench is a waste of time.The best thing to do at home is just smooth the rough edges and match the intake gasket.If you grind in the wrong area you could make the head flow worse or produce Hp and TQ in the wrong RPM range.

strstckracer
Dirt Roller

Total posts: 23
posted March 07, 2005 07:43 PM  
They are already ported. And it looks really really big. I have to run a 350 cfm carb and the Sportsman II are almost to big, so I was wondering the max it could be and if it would be too big for the carb.

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