black04

iTrader: (15)

I don't know if its ever been covered before but I am looking for some opinions. I have a 6L here that is torn down and the cylinders are pretty clean. I was initially planning to build a 370 for boost but today i was thinking. Is there really that much of a difference in the 6ci I would get from boring it over? compared to putting forged pistons in the stock block? I could see it worthwhile if one of the cylinders was damaged but i have a clean block. The price for a torque plate bore/hone is about $470. Is it worth the 6ci?

moregrip

iTrader: (8)

why not go 4.005?

Spoolin

iTrader: (8)

It's not worth it IMO. Especially since your dealing with FI.

dlt76028

iTrader: (13)

agreed. if the engine is in good shape, just put in some arp fasteners and turn up the boost.

TurboBerserker

iTrader: (1)

If you are going forged either way, then no, 6ci isn't going to make any difference.

black04

iTrader: (15)

Yes the rods and pistons will be forged either way. I just always see and hear people boring out perfectly good blocks to 370 so I was wondering what advantage there would be?

Is it absolutely necessary to do a hone? it seems to be pretty clean. I think most shops charge the same price for a light hone and boring 0.030 over. But I have never asked about 0.005

KozzyJr

If the cross hatch is still good i wouldnt bother GL with the build ill be keeping an eye this build

moregrip

iTrader: (8)

it's not so much for the the sake of larger pistons as it is for ensuring roundness and good ring seal......but if you check the cylinders and they are within a tolerence you're comfortable with, then go for it

stock48

iTrader: (16)

Thats way too much money. You should be able to get a +.oo5" tq plate hone for 150- 200.00. The problem with the factory bore is it's usually ~4.002" and not exactaly 4". Most manufactures make the pistons with a 4.000" bore in mind and you end up with too much clearence. Why they do this I have yet to figure out. Manley makes a piston that is for a 4.001" bore but I have yet to check it out.

black04

iTrader: (15)

You can see the crosshatching in the cylinders but I know you can take apart a 300k mile motor and still see it so i don't know how much that would tell. But the cylinders are smooth and it is an 07 block. I guess measuring would be the only way to tell.