heads

Posted By: copchaser

heads - 05/05/14 06:33 PM

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?

Posted By: Cab_Burge

Re: heads - 05/05/14 06:37 PM

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

Posted By: copchaser

Re: heads - 05/05/14 06:54 PM

Thanks!

Posted By: Diablo

Re: heads - 05/05/14 09:20 PM

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.

Posted By: Airwoofer

Re: heads - 05/05/14 09:52 PM

I believe my 499 B1 motor has the relocated PSO heads. I can't even get a valve spring checker between the 1.7 T&D rockers and the head gasket rail.

Posted By: Biginchmopar

Re: heads - 05/06/14 05:40 AM

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

Posted By: gregsdart

Re: heads - 05/06/14 01:45 PM

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.

Posted By: copchaser

Re: heads - 05/06/14 04:37 PM

Thanks guys. Its going to be a 572, 4.500 bore. I'm leaning torwards the B1MC heads.

Posted By: Diablo

Re: heads - 05/06/14 06:37 PM

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.