Canadian Heads

[glorydime]

Hey these are my heads and I filled the chambers with solvent and then used a syringe to pull the liquid out. Obviously I was unable to get the entire amount of solvent out however both chambers were measured in the same manner and both came back to the same result. So yes 40cc is low because I was unable to get all of the solvent back out. I’m going to run them mismatched. I’ll post back here once I switch heads and let yall know how it runs.

[cadillac512]

I believe the C8BA heads are 70cc and the C8CM are 76cc. That is from the comprehensive list posted in the past.

[glorydime]

Thoughts on running as is till I find another matching head.

[tubman]

It sounds like the chambers are close to equal (if your method of measuring was consistent). If such is the case, there should be no problem running the mismatched heads. Even if they're not, in my opinion, it would still be OK.

Good luck in finding a "match" for either one; as somewhat a connoisseur of Canadian aluminum 8BA components, I can tell you they are quite scarce, and anybody that has them will be loathe to break up a set. I have also found that usable pieces are quite expensive. I have tried to match single 8BA heads twice in my life. The first time I ended up selling the single, and the second is now a "wall-hanger" in a good friends shop. I believe the best thing to do would be to massage both heads to optimize quench and compression and do what you want with the id marks.

[Ron_r1959]

The only head harder to find is the earlier head for the 59AB block, It took me quite awhile to find a set of them. I have seen them on eBay occasionally for the 8BA block but not verry often for sure. Good luck finding one, i would agree with Tubman, match the cc volume to get even squish and move on unless it just has to match aesthetically. If what I have read on here is true, a lot of the time, the piston clearance from one end of the head to the other is rarely the same, so if that is true, the 5 cc if accurate may not matter that much truthfully.

[Ol' Ron]

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THANKS tUBMAN, yES hARRY;S ONE OF MY FAVORIT PEOPLE
gRAMPS
sORRY ABOUTTHE COMPUTER PROBLEM

[Ol' Ron]

Daughter to the rescue "CapLock" Stupidity iz my name, Boy these modern computers hard to figgerout..
Gramps

[tubman]

Don't worry Ron, I'm sure we all got the message.

[cadillac512]

Originally Posted by glorydime

Thoughts on running as is till I find another matching head.

Sure, it'll run mismatched...and probably well enough you won't really notice it. As mentioned, really machining and matching the domes to the pistons to achieve approx .040" clearance between piston tops and head domes is quite beneficial and you WILL notice it then. But to make it run and drive...sure-bolt 'em on and no worry.

[Ron_r1959]

Just ordered me a book, i love the bits of information shared here, your never to young or old to learn from each other!!

[GB SISSON]

'Low' meaning they already have small combustion chambers and therefore would produce high compression? Is there a number that is used to indicate the proper volume?

[glorydime]

Y’all are great thank you for all the replies. I will repost when I fire it back up after paint and head and intake swaps.

[tubman]

If you think about it, you can't see the different markings on both heads at the same time when it's in the car.