67malibuEFI
Jan 16th, 05, 5:29 PM
I have a 327 .030 over with a 480 lift 228 duration cam {crane 284 H12 }, 1.6 roller tip rockers, 882 heads 1.94 intake 1.50 exhaust, Accel controlled TPI, Hooker headers with 2.25“ dual exhaust, pop up pistons that were advertised at 11.25 to 1, pistons were not my choice. The problem is I have a nice set of 462 heads and a set of AFR 210 heads with 2.08 intake 1.60 exhaust 72cc chambers. This car is the family car. Don’t have no money, the AFR’s are for a project that has been put on hold for just that.
Question is can I bolt on one of the heads and still keep it a family car?
Bob West
Jan 16th, 05, 6:24 PM
11.25-1 and its the family car? good luck, I'm guessing you don't go on any cross country trips.
Pat Kelley
Jan 16th, 05, 7:09 PM
Do you know what cc chambers the pistons were speced at? 64/72/76? If you have 11.25 with the 882 (76cc) heads the others will only raise the CR and cause problems. Going back to 1.5 rockers will reduce the cylinder pressure a bit and might be a good idea.
sschevellefan
Jan 16th, 05, 8:21 PM
I`m guessing the compression is with 64/68cc chambers since I haven`t seen any high compression 327 pistons designed for open chamber heads. Your AFR heads are way too much head for that motor the way it is. I would just leave it the way it is or put some flat top pistons in it with the 462 heads. The high compression with those heads and that cam do not match what your trying to use the motor for.
Wolfplace
Jan 16th, 05, 9:03 PM
Originally posted by 67malibuEFI:
I have a 327 .030 over with a 480 lift 228 duration cam {crane 284 H12 }, 1.6 roller tip rockers, 882 heads 1.94 intake 1.50 exhaust, Accel controlled TPI, Hooker headers with 2.25“ dual exhaust, pop up pistons that were advertised at 11.25 to 1, pistons were not my choice. The problem is I have a nice set of 462 heads and a set of AFR 210 heads with 2.08 intake 1.60 exhaust 72cc chambers. This car is the family car. Don’t have no money, the AFR’s are for a project that has been put on hold for just that.
Question is can I bolt on one of the heads and still keep it a family car? If it is a 327 the advertised number for the piston is going to be with 64cc heads & even with those was probably closer to 11.0 or less in most cases.
The 882's are 76cc heads so,,, you probably have a lot less compression than you think which is a good thing ;)
Probably not the most efficient way to get to where you are but it's about 9.5 to 10.0 max depending on piston height, gasket etc.
Are you sure of the casting number?
There was a 682 if I recall that was a 283/327 head & would have a small chamber.
It would not have holes drilled in the ends though, does yours??
The 210 AFR's are 76cc's unless they have been cut but as stated are pretty big for your deal.
The 64cc heads will have too much compression.
If it's just a driver you are probably better off with what you have until you can change the pistons ;)
If you have to put one of the sets on I would opt for the AFR's even though they are pretty big,, FI seems a lot more forgiving of mismatched parts :D
You will need to be sure the pistons have a notch big enough for the 2.08 valve though.
67malibuEFI
Jan 16th, 05, 10:57 PM
The current heads burn oil, should have probly stated that to begin with, and they are 882. I had the afr's set up at 72 cc's.
I told my brother when he built the 327 the pop-ups were a mistake. :D Now its my problem.
Pat Kelley
Jan 16th, 05, 11:26 PM
If, as Mike and Anthony say, the pistons are speced with 64cc heads. The 76cc heads you now have are giving you about 9.5:1. The AFR with 72cc's yields about 9.96:1. Both of these CR's are fine with the cam you have. The AFR's, however, have ports that are way too big. They are even too big for a 350 or a 383 unless you wind the engine very high.
IMO, the best bet is to rebuild the 882's or find another head with between 67 and 76cc's and a port size of around 150-170cc. For pretty reasonable money you can get a set of 67cc SR Torquers that would fill the bill. 67cc chambers would give you about 10.6:1 which will work very well with the cam you have. In fact, this would be a near perfect match (8.19 ECR). Premium gas required for sure. 64cc pushes the CR too high for pump gas with the cam you have (280/112LSA/108ICL). With the 76cc heads you could probably use regular gas.