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40 Deluxe · 07-09-2018, 12:00 PM

Back up the bus a bit! I dug out my burette and 41T head I have and measured a chamber. it came out to 84.5 cc's! So much for that online chart!
I had set these 41T heads aside years ago because I thought the chambers looked awfully deep. They might breathe a little better at high RPM, but compression? Forget about it!

07-09-2018, 12:00 PM	#5
40 Deluxe Senior Member Join Date: May 2010 Location: now Kuna, Idaho Posts: 3,779	Re: 41Theads on a 4"stroke x 3.125 Back up the bus a bit! I dug out my burette and 41T head I have and measured a chamber. it came out to 84.5 cc's! So much for that online chart! I had set these 41T heads aside years ago because I thought the chambers looked awfully deep. They might breathe a little better at high RPM, but compression? Forget about it!