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05-14-2010, 09:04 AM | #1 |
Senior Member
Join Date: May 2010
Location: Norway
Posts: 298
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Model B intake port porting?
I finally got my block back from machining, what a treat! But i realized that the intake ports on the side of the block is much smaller than the intake i want to use. How much can i open up the Model B (actually a G28T) intakeports without breaking into a waterjacket? Any experiences? is 1 3/4 possible?
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05-14-2010, 11:24 AM | #2 |
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Join Date: May 2010
Location: Connecticut
Posts: 272
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Re: Model B intake port porting?
OHV, Be careful with the B block, the wall thicknesses are sometimes thinner than they were with the A block, and cracks between the valve cavities are notorius. Are you using a cam so hot that the port sizes are the restrictive factor? If the engine can't breathe at the valve openings, increasing the size of the ports is not going to help. Good Luck with your project!
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05-15-2010, 06:13 AM | #3 |
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Join Date: May 2010
Location: Eastern Tennessee
Posts: 11,507
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Re: Model B intake port porting?
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BTW, most of large aluminum manifolds that you find with big ports and no boss for a throttle bellcrank were actually manufactured for an OHV and not a flathead for the very reason you are working on. Last edited by BRENT in 10-uh-C; 02-20-2011 at 05:00 PM. Reason: Updated Bill Stipe link. |
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