Originally Posted by robert f thomas

I want to thank epoch, master yodub, jim blake, and shmoo for solid responses. I sent my throttle body and intake chamber out to be bored and matched. I am still working on the plenums. I cannot seem to polish the deep pocket just past the butterflies. I am grinding the 2 outside plenums on the inside wall. I am widening apprx 1 mm. I know I am compromising velocity but I want to try to straighten the flow - even a miniscule straightening is acceptable to me. I will also be going after the domes of the butterfly plenum openings and I am grinding the domes of the tiny runners. The weld/ manufacturing lines have been irradicated.
Has anyone enlarged the dome openings of the long runners? I am thinking of putting "pea shooter" grind in the middle of all 4 domes - through all 3 bodies. I'll match up all three bodies and lay a drill bit across the dome and let it grind the width of the drill bit. It will make a force like when you are in your airline seat and the dam air valve above is broken and the air keeps hitting you in the ear and then when the plane lands you drink scotch whyskey waiting for a ride that ain't commin and then finally she shows up and says she went to the wrong terminal and hands you the keys and says "I'm tired, I need you to drive." 1/2 way home she wakes from a nap and says we need to go meet some of her girls at a bar 10 miles out of the way, into the night you fly.
Then when you nod out at the bar she complains you don't respect her friends.
Righttt.

Now, I'm in South F. L. A. grinding on a B18C1 intake manifold. Good therapy.
Thanks to all.