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Author Topic:   head milling
dirtracer7
Dirt Maniac

Total posts: 106
posted January 21, 2003 07:21 AM
Does anybody know how much I can mill a cast iron windsor jr.for sb Ford before the intake needs work. I have been told about .040.

Monster
Dirt Maniac

Total posts: 135
posted January 21, 2003 04:23 PM
It depends on all the mating parts. Some(most) intakes will not stand .040 without rework. On SBF's, as you (flat) mill the heads, the intake manifold bolt holes move closer to each other, by the total amount that you mill off 1 head(mill both heads .040, centerline of bolt holes is now .040 narrower). Here's how to check if things are ok: On an assembled long block, glue intake manifold gaskets to heads and trim port overhang. Set intake manifold on. Thread several(all) bolts in by hand. You should feel absolutely no resistance caused by the intake manifold. I made up a set of studs that I use just for this job. You can drill holes oversize(easy, but do not go too big!), but in severe cases, you will have to slot holes in intake(not so easy). This is important, cause in SBFs, the intake manifold acts as a big pry bar trying to pry the heads off the block and blow head gaskets. If you have to overtighten an ill-fitting intake to get rid of water or vacuum leaks, you are making a bad situation even worse.

outlawstock17
Dirt Forum Champ
Total posts: 620
posted January 21, 2003 04:36 PM
good stuff monster and right on the money. i might add that if you do mill the heads, toss the cork end seals and use a bead of silicone. the space between the block and the intake manifold will be less with milled heads and the cork end seals will exacerbate the "prybar" effect monster is speaking of.

dirtracer7
Dirt Maniac

Total posts: 106
posted January 21, 2003 06:02 PM
I was wanting to take about .025--.027 off which sounds like might not be a problem,just look it over real good.

superdave
Dirt Forum Racer

Total posts: 89
posted January 21, 2003 08:19 PM
Try this site http://www.hastingsinc.com/service%20tips/how_to_grind_v8_ohv_heads.htm

Good luck,
Superdave

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Superdave
www.salinaspeedway.com

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