Inliners International Forums General Discussion Hi Performance Street Performance Piston Chevrolet 250 Group Buy

I'm interested in a possible group buy for a street performance piston for a Chevrolet 250. I called a couple of piston manufacturing companies this past week.

I'm interested in the following:

Normally aspirated street engine, Chevrolet 250
Tighter piston-to-wall clearance, 0.003" or less
Cast or forged, through only forged looks practical
Eutectic or hypereutectic silicon alloys prefered, 4032 alloy or similar acceptable (as used by OEM's forged pistons, Ford, BMW, Mahle)
For 6" connecting rod application (Off the shelf Crower Sportsman or Scat)
Approximate 1.365" compression height
Flat top piston
Use widely available rings, sizes and material to be determined
If single overbore size: either 0.030" or 0.040"
If two overbore sizes: 0.030" and 0.050"
Desire a piston weight under 470 grams

Manufacturers require:
Minimum run for forged pistons: 40 to 80 pistons, dependent on manufacturer
Minimum run for cast piston: 250 pistons, not appealing
Possibly may allow two different overbore sizes during single run
Manufacturing time after receiving 50% payment and signed design drawing: 4 to 6 weeks
Remainder of payment required to ship pistons


Let me know you are interested in joining in a group buy of the above mentioned type of piston in the near future. Either respond or send me a PM. The group buy will drop the price from around $100 each to possibly $50 each. I am flexible on some of the design details, but want to maintain the 6" connecting rod application, use of the tighter clearance forged silicon aluminum alloys, and flat top pistons.