Customer brings me two cleaned, magged cores.
Not much core shift. They’ve been done at least once before.
One head had 3 chambers pretty close with regards to quench area depth....... one .030 lower/deeper.
The other head had the two ends .040 apart, the two in the middle split the difference.
The two deepest ones were .090 and .100 deep.
They’re all about .105-.110 deep now, nominal 67.5cc.
The smallest chamber also had the valve job about .025 closer to the deck.
That whole chamber was just closer to the deck.
Aftermarket closed chamber heads...... zero deck with flat tops....... done.
Better and cheaper.
The target intake flow was 240.
Wasn’t giving that up without trimming the guides and the lump in the roof.
Way more work than 240 out of an X head.
Shooting for 160 from the exhaust.
After new seats installed, vj and a bowl blend, bullet nose the guide boss...... 158.
I’ll clean up the rest of the runner, should get me there.
I converted to 11/32 stem nailhead valves.