Even though when I bought my CNC Hughes Victors they said their work included milling the heads back to the original chamber size (75 cc is what Edelbrock advertises), they looked "big" to me. So, tonight I measured the two end chambers of one head and came up w/ 82 cc for both (fractionally more for the one chamber that shows more drop-out from the CNC program).

Can anyone give me a reasonable estimate of how much should be milled to reduce the chamber volume per 1 cc? Now that I know they're actually bigger, I think I'll just take 'em down to 78 cc, same as w/ my Stage VIs, and leave the CR at 10.8.

P.S. What got me thinking I needed to measure my heads was noticing that Hughes has recently changed their CNC Victor description to say their program increases the chamber size and for additional $ they'll bring the chamber down to what ever your target volume is.

I wonder at what point they realized that 75 doesn't equal 82?