Quote:
Originally Posted by Turbo1dr
I'm no expert with highly sensitive electronics or flow machines to confirm that tapering the cylinder helps but I can judge by my common sense that it should flow better when there's no "wall" for incoming air to hit. Small bore Big Block Chevrolets also have this taper from the factory. Yes there is enough material to taper the top of the bore. I don't taper the entire top of the bore just where it's needed where the chambers overhang.
Here's a crude drawing to show what I'm talking about.
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This is some good info.I was wanting to go with a GN1-R Head I thought they where only Tall ports. I see you talking about a .030 over bore. Can this be done
on a .010 or .020 over bore block? I have a Stage 1 block and did not want to have the block bored over .020 because it has never been bored. I do want to
go to a bigger Vavle heads and 14 head heads. Looks like from the pictures I would have to do alot of Tapering work at top of the block on a .020 over block.
Can this be done on a .020 over block has any done this on a .020 block with these GN1-R heads?. I wanted to use my stock ported intake with a set of GN1-R?
How much better do the GN1-R heads flow race ported than the GN1 race ported any flow numbers to compare these two heads?