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Re: heads
[Re: Cab_Burge]
#1616507
05/05/14 05:20 PM
05/05/14 05:20 PM
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Joined: Apr 2005
Posts: 1,106
Quebec, Canada
Diablo
super stock
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super stock
Joined: Apr 2005
Posts: 1,106
Quebec, Canada
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Quote:
Quote:
I'm building a new engine and trying to decide on heads. Whats the deal with B1 heads with the moved centerline? How about the Indy 572-13 heads?
The B1 with the moved centerline heads are for the bigger bore spacing blocks, not the stock blocks, I think  Call Koffels(419-433-4410) and ask them 
I wouldn't say they are for the bigger bore spacing blocks. Just for blocks which have bigger bores. I would saying a bore of 4.5 would be prefect for those heads. But they will fit the stock 4.8 boring spacing Chrysler block.
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Re: heads
[Re: Airwoofer]
#1616509
05/06/14 01:40 AM
05/06/14 01:40 AM
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Joined: Nov 2010
Posts: 1,397
Carson City, Nevada
Biginchmopar
pro stock
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pro stock
Joined: Nov 2010
Posts: 1,397
Carson City, Nevada
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B1 = 2.300" Intake and 1.780" Exhaust B1-MC = 2.400" Intake and 1.780" Exhaust they move the exhaust valve over to fit the bigger intake valve. I believe you need to have a 4.500" bore for the B1-MC 
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Re: heads
[Re: copchaser]
#1616510
05/06/14 09:45 AM
05/06/14 09:45 AM
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Joined: Jan 2003
Posts: 9,982
Frostbitefalls MN (Rocky&Bullw...
gregsdart
master
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master
Joined: Jan 2003
Posts: 9,982
Frostbitefalls MN (Rocky&Bullw...
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Even though I run 440-1 heads, I have seen so many motors with B1 stuff make more power I recommend them on anything 499 and bigger as long as you are willing to rev it past 7,000 rpm. Obviously the rpm drops with bigger motors, and a 572 with B1 heads might peak below 7200? If you go 4.5 bore then consider the B1Mc, but they are not required, just worth more hp.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: heads
[Re: copchaser]
#1616512
05/06/14 02:37 PM
05/06/14 02:37 PM
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Joined: Apr 2005
Posts: 1,106
Quebec, Canada
Diablo
super stock
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super stock
Joined: Apr 2005
Posts: 1,106
Quebec, Canada
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Quote:
Thanks guys. Its going to be a 572, 4.500 bore. I'm leaning torwards the B1MC heads.
If your building a 572, 4.500 bore then the b1-MC are the way to go. Unless you want to move up to the Pred heads. Just depends on the power you want.
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