Silvolite Piston Set, 1139.020

Silv-O-Lite Piston - Ford 390ci/6.4L (V8)

2.620" diameter recess.075" deep with 4 valve reliefs. Car and truck engine. Floating pin. Head volume +9.5cc.

Sold As: Sold as a set, priced per set

Engine Manufacturer: Ford

Engine Family: Ford Big Block FE

OE Cross Reference: C8TZ6108R, D1AZ6108G

Engine Displacement (Liters): 6.4

Engine Displacement (cubic inches): 390

Piston Head Type: Dish

Crown (cc): +9.5cc

Compression Ratio: 8.2

Top Land: 0.23

Pin Type: Floating

Base Number: 1139

Top Compression Ring Thickness IN: .0781"

Piston Pin Outside Diameter IN: 0.975

Compression Height MM: 42.1

Bore Diameter MM: 102.9

Bore Diameter IN: 4.05

Oil Ring Thickness IN: .1875"

Second Compression Ring Thickness IN: .0938"

Piston Pin Outside Diameter MM: 24.8

Compression Height IN: 1.66

Crown Type: DISH

Year From: 1968

Year Range: 1968-1976

Pin Number: 0975x305A

Lock: 98

Ring Pack: 5/64, 3/32, 3/16

Oversizes: STD, .020, .030, .040, .060

Oversize: .020"

Piston Material: Cast 332 Alloy

Oversized: Yes

Pin Configuration: Offset

Year To: 1976