WebPistons with a higher compression height, say a 455 piston in a 350, will cause the piston to stick out of the top of the block. [ Thanks to Dave Brode, Bob Barry for this information. ] … WebBuy Icon Pistons IC888-040 Fits Pontiac 455 Flat Top 5.5cc Bore 4.190, ... Piston Type: Flat Top: Compression Height: 1.490: Piston Material: 2618 Forged: Piston Ring Size: 1/16 …
Pontiac V-8: Pistons and Rings Performance Guide
WebOct 7, 2024 · The rod nuts contact the oil pan so a 1/4-inch spacer must be installed to drop the pan slightly. The Pontiac rod is 6-5/8-inch, and the 401-425 rod is 6-1/4-inch; therefore custom pistons with the wrist pin moved up are required. Stock rods require very little work because they are forged and very strong. WebPontiac 455 pistons forged flat top piston and ring set standard size 4.150 bore 10.3-1 compression with 87cc chamber 4.210 stroke 6.630 rod 1.490 compression height .980 wrist pin 1/16 1/16 3/16 ring grooves flat top -5.5cc 2618 Alloy weight piston 529 grams wrist pin 149 grams high tide hythe kent today
PONTIAC 7.5L/455 Pistons - 106.426mm Bore (mm) - 1.490 in.
WebSep 23, 2024 · I was about 38 years old when I bought the Formula. After all these years, outwardly, I'm in about as good a shape as the car is. Inside, however, my pistons, rings and other parts are worn just like most other old cars.--Rick Stein . 1973 PONTIAC FIREBIRD FORMULA SD-455. 290 HORSEPOWER @ 4,000 RPM. 395-LB.FT. TORQUE @ 3,600 RPM WebOct 4, 2011 · I've heard of this before. You need to be careful with the Pontiac pistons as I've seen different published numbers for compression height. If you use the Speed Pro forged Pontiac 455 pistons with the 1.497" compression height and the 7.00" 425 rods, you end up with 0.022" taller piston deck height relative to the stock 455 pistons and rods. http://www.wallaceracing.com/cratio0001.htm high tide heysham today