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What Is A Polyspherical Head?

The Polyspheric or Poly engines were V8 engines produced by Chrysler from 1955 to 1958 as lower-cost alternatives to the Hemi engines. These engines were based on the Hemi engines, using the same blocks and crankshaft parts, but completely different cylinder heads, pushrods, exhaust manifolds and pistons.

SAM 2015 Engine Masters Dyno Pull Chrysler Poly Head

First power pull on the engine 402 A-series Chrysler (Poly) 3.950 bore x 4.100 stroke OEM

Zspheres Vs Polyspheres- What to start with?

In this tutorial we’ll do a short over view of the advantages of the different spheres in Zbrush, when they’re most useful and what …

Myrtle’s 318 Polyspherical engine

2018 video prior to engine overhaul.