Bore limit?

MtDewd

Registered User
What is the farthest you can bore a 91 SC block? I plan on going 30 over, yet I see a lot of people going only 20 over.
 
Last edited:
They're leaving enough room for a second buildup.

By going .20 over they are leaving room for a second .20 rebuild.

I beleive that you can go up to .40 over, anymore than that you start running into having too little room between the bores and the associated webbing flexing/overheating.
 
.40 Over

I agree with Deep6. The last short block I purchased from Ford came .40 over, I beleive that is the max, but you should safely be able to go that far if you have to since the factory does.
Jeff
 
Back
Top