Piston recommendation for higher compression
#1
Piston recommendation for higher compression
I'm in the process of rebuilding my '72 350, will be reboring 30 over and wanted to go with a smaller dish piston to boost my compression high enough to run regular octane while increasing performance. Any spec/manuf suggestions?
...also have a XE262H, heads are done (3 angle etc...)
...also have a XE262H, heads are done (3 angle etc...)
#2
I found a cast iron piston from Mondello 11.9cc with 7a heads should be 9:14:1...is this regular octane friendly?
http://www.mondellotwister.com/PisPinRingBrng.htm
http://www.mondellotwister.com/PisPinRingBrng.htm
#3
I found a cast iron piston from Mondello 11.9cc with 7a heads should be 9:14:1...is this regular octane friendly?
http://www.mondellotwister.com/PisPinRingBrng.htm
http://www.mondellotwister.com/PisPinRingBrng.htm
9.14 is pump gas friendly.
#5
Imo you can do better for not a lot more money
http://webcache.googleusercontent.co...istons&ct=clnk
Use a moly ring if possible, not that much more.
Jmo.
Btw 89 octane, maybe, depending on the cam and gear.
#6
I'm looking at a TRW piston set (NOS) with the following specs;
TRW L 2389F .040 OVERSIZE FORGED PISTONS AND ONE SET OF TRW T 8190X OVERSIZE CAST PISTON RINGS
2.932" X .235" DEEP CUP,1.610" COMPRESSION DISTANCE AND A .980" DIAMETER PIN.RINGLANDS ARE FOR 5/64",5/64",3/16" RINGS
Are these slightly higher compression than stock (stock 2.920/0.215 dish and compression distance is 1.595)?
.040 is mentioned is this non standard (.030)?
Thanks for all the advice
TRW L 2389F .040 OVERSIZE FORGED PISTONS AND ONE SET OF TRW T 8190X OVERSIZE CAST PISTON RINGS
2.932" X .235" DEEP CUP,1.610" COMPRESSION DISTANCE AND A .980" DIAMETER PIN.RINGLANDS ARE FOR 5/64",5/64",3/16" RINGS
Are these slightly higher compression than stock (stock 2.920/0.215 dish and compression distance is 1.595)?
.040 is mentioned is this non standard (.030)?
Thanks for all the advice
#8
I'm not sure if the larger compression distance (between wrist center and piston top) would bring it closer to the head giving more compression. It looks to be a pretty low compression piston in any case...
#9
- Eric
Last edited by MDchanic; April 22nd, 2011 at 01:41 PM. Reason: Recalculated for 0.040" additional piston diameter.
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December 27th, 2011 08:34 AM