273 302 318 340 build

273 302 318 340 build

Thanks, yeah these were piston choices I had written down so far, Sealed Power 526AP, Sealed Power 285 AP and Silvolite 1266C. I agree with you on the 526AP
I checked out the links, thanks! Campbell is more expensive in this case(526AP30) by about $100??
Here is a link to the Summit site with my question posted about the weights of Silvolite1266C and answered at the bottom. Maybe your right with it being shipping weight LOL

I emailed thru Summit site to get the weights of the SP 526AP 30.
Thanks again!

nm9stheham said
The 1266C has 4 valve reliefs; it is not a flat top. It crosses over to the Sealed Power 285. So you will add 6-8 cc's of valve relief volume in to the equation and go back downwards on CR.

Stick with the 526AP's, IMHO.

Silvolite catalog is here; look at the top of page 22 for the 1226 valve relief pattern:
https://www.uempistons.com/catalogs/silvolite_catalog.pdf

That weight range of 778-805 grams that you were given does not make sense...... Even adding 161 pin weight to 592 gives 753 grams... Typical ring pack weight would be around 58 grams and adding that in does make sense either. Maybe they are including the carton weight? LOL

nm9stheham said
BTW, check with Campbell Enterprises for another option on buying these pistons; their prices are generally a bit lower than Summit. This link will take you to the cast pistons, despite what the title of the link reads:

318 Pistons | Chrysler & Dodge & Mopar | Forged & Stroker Pistons