CNC Dude, " It is possible that with the 6" H-beam rods that are available for the 250 today,that the LS piston shown could be made to work with a little block decking to adjust the deck height",,
So w/a 6" rod,,it should work,correct?
Thanks.

It is not that hard to sink the valves & open the chambers to get a lower compression ratio.
Maybe in order to use a 292 flat top piston???

IIRC,my big chamber 250 cyl head was 72 cc's. I had sunk the valves, opened & unshroud the chambers to 82-84 range, cc's

I have SBC 307 TRW forged flat top pistons w/4 valve reliefs.

With a milled small chamber head I ran 12 to 1 compression,it had 220 cranking compression,then switched to the 82 cc head & had about 8.5 to 1 & used a Paxton super charger.

It was a good torquey engine w/12 to 1 compression & three DCOE 48 MM Webers. Fun to drive!

Ross forged 250 pistons are $450 for a set of 6 w/rings & pins?
If so, great price!!

MBHD


12 port SDS EFI