400/450 stroker....Cheap parts, lotta work.
When we first cc'd the combustion chambers in the 346 heads we got column #1. Then we had the heads milled and we machined the combustion chamber flats to .110" deep and got column #2.
1) cc's........2) cc's
88.4...........87.7
89.0...........88.8
90.1...........89.1
89.6...........88.4
89.0...........88.8
89.6...........88.8
90.2...........89.6
88.8...........87.8
If you've ever tried to equal out the combustion chambers by grinding on them you know what a pain in the pahtoot it is.
Never-the-less we got out the digital programmer (on the left in the photo) and the CNC machine (on the right) and made one pass through the smallest chambers.
And ended up with these results......................
88.8
88.8
89.1
88.6
88.8
88.8
89.6 I'm not willing to spend the time to grind all the chambers out this big!
88.6
The compression ratio will vary from 10.06:1 @ 89.6 cc's to10.15:1 @ 88.6 cc's Good enough for this engine!
When we first cc'd the combustion chambers in the 346 heads we got column #1. Then we had the heads milled and we machined the combustion chamber flats to .110" deep and got column #2.
1) cc's........2) cc's
88.4...........87.7
89.0...........88.8
90.1...........89.1
89.6...........88.4
89.0...........88.8
89.6...........88.8
90.2...........89.6
88.8...........87.8
If you've ever tried to equal out the combustion chambers by grinding on them you know what a pain in the pahtoot it is.
Never-the-less we got out the digital programmer (on the left in the photo) and the CNC machine (on the right) and made one pass through the smallest chambers.
And ended up with these results......................
88.8
88.8
89.1
88.6
88.8
88.8
89.6 I'm not willing to spend the time to grind all the chambers out this big!
88.6
The compression ratio will vary from 10.06:1 @ 89.6 cc's to10.15:1 @ 88.6 cc's Good enough for this engine!