Autotec Series forged pistons for 4.233 bore Ford Series based engines are available in flat top, inverted dome, or milled dish designs. Standard ring packs are 1/15 1/16 3/16 widths with D Wall radial dimensions. Wrist pins are .975 or .990 diameter by 2.700 long as indicated in the technical specifications, and wire locks, along with oil rail supports (if required), are included. Broached pin-oilers and gas accumulator grooves are incorporated at no additional cost. Domes and combinations not listed are available as a custom piston.
Autotec flat top pistons are manufactured on forged side relief, 4032 low expansion, high silicon material excellent for street or strip applications, fitting heads with OEM valve locations.
Autotec flat top pistons feature:
CNC precision machined ring grooves for 1.5 1.5 3.0mm low friction rings.
Top ring land gas distribution grooves serve to enhance performance and improve ring seal.
.990 or 1.040 diameter, 2.800 long, 51 series steel wrist pins with pin fit, wire locks, broached pin oilers, and gas accumulator grooves included at no extra charge.
Autotec dish top pistons are manufactured on forged side relief, 4032 low expansion, high silicon material excellent for street or strip applications, fitting heads with OEM valve locations.
Autotec dished top pistons feature:
CNC precision machined ring grooves for 1/16 1/16 3/16 low friction rings.
Top ring land gas distribution grooves serve to enhance performance and improve ring seal.
.990 or 1.040 diameter, 2.800 long, 51 series steel wrist pins with pin fit, wire locks, broached pin oilers, and gas accumulator grooves included at no extra charge.
