10.5:1 273 pistons with 360 heads compression ??

[krazykuda]

You guys need to remember also, just cause you buy "10.5 to 1" pistons, DOES NOT mean the engine will be true 10.5 to 1. Most of those engines were lower in compression than that. Its a blueprint spec...

I did my calculations empirically, the stack ups don't matter. My results were based on bore, stroke, compression, and a known head that I've cc'ed. I left it open for him to apply to his application.

 

[teringer]

before you put the small head gasket on lay it on the 360 head I don't think you will seal the fire ring and it will just hang over with out being crushed.

 

[Alpine White]

The Rebuilder's Choice Domed Pistons from Kanter are taller than the Egges so we'll assume those. I cc'ed those pistons and the dome volume is 11.5cc's. The compression height I measured was 1.769" Assuming your deck height is right on spec at 9.6" and assuming all the numbers you gave above, the static CR calculates to 8.75, which is not as bad as I expected. The smaller thinner head gaskets are helping you quite a bit.

Hi mate,

I realise this thread is old but I’ve been trying to research the 273 Commando pistons, especially the RC pistons you mention here. I recently bought a set of .030 Rebuilders Choice 4bbl Commando pistons and am needing the dome volume. I’ve been reading anywhere from 15cc’s to what you said of 11.5cc, I’ve also heard as high as 16cc. Please see photos attached of my piston/s. Are these definitely the pistons you have cc’d mate? You can private message me if you like man. Thanks in advance.