I understand that the engine would be a 357, but are there any draw backs to having it bored .40 over?

 

thinner cylinder wall?

 

you'd need a new set of pistons but that's sort of a given.

 

Thanks for the response.

 

350's generally have enough bore thickness to accomodate a .060" overbore. Sonic checking is recommended at that overbore for racing to insure the bore has not been compromised through bore shift, etc.. But at .040", there should be no concern at all.

I did hope you meant ".040" and not ".40" which is impossible with what you have to work with.

 

Yes, I meant to type .040. Whats the possibility of getting the short block balanced without taking the internals out?

 

Exactly zero.

Pretty hard to weigh stuff when you can't put it on a scale.

.040" over is kind of an odd size; the piston selection isn't as great as .030" or .060". But, for most typical street type uses, you shouldn't have any trouble finding what you want. Other than that, there's no particular disadvantage.

 

Agreed but there are so many parts for 350 derivatives nowadays that he shouldnt have too many problems finding a piston he likes.

 

Well, .30 over yields 5 Cubic inches, so I guess thats about right...There arent any draw backs that I can think of, besides thinner cylinder wall as said above...This really isnt a problem until you rebuild the motor again...People usually bore on a rebuild, to sort of "clean up."

Hope this helps...

 

To All, thanks for all the help. I am going with a 357 with vortec heads.

 

Cool, sounds like a good project. Your piston options will be decreased with an odd bore size. It's been NO treat finding pistons for a 0.040" over 400

 

Why .040 over? This won't really yield you any better power increases than .030 over. The more material you bore away now, the less you have left to play with in the future. What if you get a score in one of the bores? You want to have as much left to work with as possible down the road.

 

The block needed to bored .04 since the ring on #2 cyl. went bad. Also the block was free. I will be taking some pictures of the up and coming project. Should have the motor ready for installation in 2-3 weeks. Just need to find a cherry picker to use during the installation. I have everything else.

 

Well that explains it then. If you have to go .040 then there is nothing wrong with that.

 

i went with the .060 machine dude said it would be fine with all the forged molly stuff i put in it. a guy at the bodyshop down the road from me has an lt1 bored .090.... if his talk is anything like his body work then i know hes full of Shhh

 

he must be... from what i know, thats not possible.

 

same thing i was thinking man. like i said if his mouth is anything like his bodywork, then hes full of ****