AmericanMuscle33

Here's the deal. I supercharged my high mileage bolt-on Lt1, and broke the ringlands on the stock Hyper-crapptic pistons after 3weeks of hard driving. My plan is I just bought another stock Lt1 I can swap into the car just to make it driveable again while I rebuild my original motor into a fully forged 383 on the side (prolly over a period of a year). The thing is, I would like to use my supercharger and current bolt-ons one the new motor while I do the build up of the old. I don't want to repeat myself on the mistake of stock pistons = broken motor in 3weeks.

I was thinking installing Forged pistons (std bore), and all new rod/main bearings (std dia.), along with a rebuild kit of all new gaskets, etc, etc. like the ones offered on Summit...to ensure this new motor will last about a year while I do a full build-up on the old. My question is, is it a good idea, or is it doable, to put std size bearings and pistons back into a motor that has 120,000 miles on it? Or is it worth it to have the block over-bored, and maybe even the stock rods oversized?

Thanks,

AmericanMuscle33

meh...new plan is to get new motor...tear it down and measure everything...see what's in spec in regards to clearances and what's not...then order parts...

1racerdude

A piston swap opens up a big can of worms.
Ya will have to get it rebalanced unless ya can get forged pistons the same weight as the hyper-u-craptic factory pistons.
Std bearings are doable if the crank checks out to size.

evilundisguised

Buy a new motor to measure specs? Those are available elsewhere with much less work/cost involved...

Jameslt1TA

Just run the stock bottom end while you build your other motor. Or else your just wasting your money(which will turn out to be a ton more than you think it will cost). If you dont want to blow it up just take the blower off(i know hard to do after having it) or find a dif pulley to lower the boost.

AmericanMuscle33

By "new motor" i was referring to the engine I just purchased with 120,000 miles on the clock. I said new just to designate it from the "old" original motor that is still in the car (with broken ringlands). Yeah I keep thinking the best move would be to not run the blower, but after having it...that's easier said than done...

sssalah

If the bores are not out of round, tappered or scratched then it can be re-ringed using the stock pistons and having the new rings gapped properly for boost. Lowering the boost to reasanable level is also good.