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Re: How much to mill Indy's SR's
[Re: drag440]
#196336
01/17/09 10:19 PM
01/17/09 10:19 PM
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Joined: Jan 2003
Posts: 14,479 So. Burlington, Vt.
fast68plymouth
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I Live Here
Joined: Jan 2003
Posts: 14,479
So. Burlington, Vt.
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based on what you gave for specs, i get 10.42cr now, and it would take 14cc's off the heads for 12:1.
you cut Indy heads are roughly .006 per CC, so for a 14cc reduction, you're looking at cutting them .084. better check the V/P clearance before cutting them that much.
cut the intake side .012 for every .010 off the deck. so, if you cut the decks .084, cut the intake side .100.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: How much to mill Indy's SR's
[Re: fast68plymouth]
#196337
01/17/09 10:56 PM
01/17/09 10:56 PM
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Joined: Jan 2003
Posts: 16,917 NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,917
NC
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Quote:
so for a 14cc reduction, you're looking at cutting them .084. better check the V/P clearance before cutting them that much.
cut the intake side .012 for every .010 off the deck. so, if you cut the decks .084, cut the intake side .100.
IMO, that wasn't the best piston if a 12 CR was desired. But many are running those heads around 68cc, so it isn't a big streatch. Watch out for piston to valve clearance. A wide LSA nitrous cam will help somewhat.
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