Hey John Walker

[724doorE]

Got to ask....since your an american Iron guy tooooo.

I was looking at the numbers today...comparing 66mm, 70.4mm cranks and rods.

short stroke rods are 130mm c-c and big end of 61 mm and 22mm wrist pin. long stroke (70.4) rods are 127.8mm c-c and 56 big end also 22mm wrist.

It seems to me you could offset grind the 66mm crank to end up with a 68.5mm crank and use the 127.8mm rods. You would even have a fraction of a mm on the dome to remove as desired to improve compression ratio. Do you know of this being done, or is it a case of not worth while compared with just starting off with a bigger engine.

This is typical american iron stuff, no, like in flatheads and other v-8's.

Seems to me one could have an awfully bulletproof midsize engine for a comparably cheap cost using stock pistons.

What do you think?

Dennis H.

72 911E

66mm crank on the brain

[john walker's workshop]

i've heard of it being done, but i haven't done it personally. perhaps a call to Jerry Woods is in order.