ddn

The machine shop called today, he said he was about to bore the block, and realized it was already .060 over.

I can just see Bubba the redneck I bought it from "Hey paw, let's get some more cooobic inches outta this bad boy"

I wanted TRW-2465 pistons for it, because of the open chamber heads. They dont make them any larger than .060 oversize.

What can I do?

Doh! I forgot to mention for you guys that haven't followed my buildup, the engine is a 454.


[Modified by ddn, 9:56 AM 1/21/2002]

rainman69

If it's in good condition, just have it checked for cracks/problems and honed to a nice finish. Then install your .060 pistons. That should work if the bores are round and good to begin with. :smash:

Neo Fender

Even if pistons larger than .060" were available, I'd hesitate on punching out a BBC that far. Someone will chime in saying their uncle went .080" over with a 3,000 HP 454 and it went for 700,000 miles.

I'd be afraid of ending up with an 8 cylinder anti-freeze pump. :(


[Modified by Neo Fender, 10:35 AM 1/21/2002]

Smokehouse69

Is this a Small Block? If it is then about the only choice you have is to keep it as it is. I'd hesitate to bore a 327 or 350 more than .060, although I believe that there are bigger pistons available. If you want to keep your original block an expensive alternative would be to a resleeve. It might be cheaper to find a good used block and start over.
If it is a Big Block, then you could probably go to .80 without too much worry. Although there are nearly as many choices of pistons available.

427V8

I'd ask the machine shop for advise, if they don't know, get the block outta there!
Maybe you could get by with .070 over and custom pistons...

MikeC

If worse comes to worse, you could sleeve the cylinders that are bad. You could probably find a cheaper block than sleeving all of the cylinders.

Monty

If the block is anything special, sleeving it may be an option depending on what your machine shop charges for this and what the availablity for replacement blocks are.

ddn

Well I've got a few options now

1) Keith Black Hypos, .070 and .100 there is one KB207 (and 257) that has a .250 dome, 10.2:1@119cc it would be perfect. What's the opinion on KB and Hypo pistons in general. I plan to run a 150shot of nitrous, but that shouldnt be too big of a deal, even on cast pistons.

2) Hone the bores at .060 and install .060 pistons. If the bores are clean, can I do this? Bad idea?

The block is nothing special, so sleeving would be foolish, but I really don't want to have to find and buy another block either.

84ZZ4

I'd have the block sonic checked to determine if it could go safely to .070" over. If it checks out, go ahead and bore it and get the .070 over pistons. If it doesn't clear up at .070 over, I'd be tempted to just junk the block and start over.