xDiscoGregx

Like the titles says, what is the max bore on stock 5.0 jugs before they are no good?

aode08

.060 is considered to be bad, go no more than .040

xDiscoGregx

ok thanks, would this be the same on a winsor or other blocks or do they all differ?

white93pony

.040 no bigger! on the stock block that is

xDiscoGregx

next question, when you say .040 is that in mm or in?

sorry if it sounds dumb i am into quads and we deal with cubic centimeters not cubic inches so i need to know what i am lookig for when looking to buy a mustang

WhiteWindsor

That would be 40 thousands of an INCH

xDiscoGregx

awsome, thats what i figured but wanted to be 100% sure thanx mang

mjr46

My 66 is .040 and rns cool all day long...I've seen a few at .060.....I don't like to go that far but they are capable of such with an adequate cooling system

WhiteWindsor

Check bottom of my sig. I have no cooling problems at all. Last time i went to the track i ran 15 times, drove 40 miles there and back. On the way back i did not turn on my fans one time and i stayed between 150-165. I have a northern radiator, dual fans and hi flow pump. The cooling system is insane on that car.

PJC Racing

In most cases .060" is fine, but the block should be sonic checked to ensure there is enough material left in cylinder wall.