NalleyKy

I’m looking into building an lm7 soon. Will be a little turbo engine for the street but mostly strip. So I’m wanting to keep the stock bore and stroke if I can. But I do want to put pistons and rods in it. I was interested in the wiseco “junkyard dog” pistons because they use the stock rod length. Problem is I can’t find any 6.098 rods other than summit and K1. I’ve read some mixed reviews on them both. So I thought I’ll get some pistons that are made for a 6.125 rod because there are A LOT of those out there. But I can’t find any pistons that support 6.125 but using the stock bore. Maybe I’m looking at something wrong I’m not sure lol. Any help and advice is much appreciated since I’m new to the game.... This is probably a stupid post but Im trying to learn... lol. Thanks

99 Black Bird T/A

iTrader: (4)

@WS6store.com @tech@WS6store

The WS6 Store has several complete kits for that sort of rebuild. I think the rods were separate. Hopefully, this will help with a rough idea. There are several versions of the kit and they can tailor it to your need etc.

WS6 Store - RPM Speed LS Complete Engine Rebuild Kit

theunderlord

Do you have the engine apart yet? I wouldn't start looking at what sized pistons you think you'll need until you take a look at the cylinder walls. It might make sense to have it honed to a size that is more common and has more piston sizes available.

tech@WS6store

iTrader: (2)

We do have many options available.
There normally isnt a reason to go with forged, especially if youre not going to make sure the bore is straight, but also for even 500 to 600 hp, the stock or stock style pistons seem to work just fine and dont have an issue sorting rods. Just gap the rings for your intended goals and make sure the tune is good.

NalleyKy

no its not apart yet but you're right. after looking around even more i think itll have to be bored anyway to get what i want. obviously wont order anything without tearing it down but im looking at 3.80 bore now

NalleyKy

hoping to push 850+ with the right turbo. but who knows. may run with stock pistons and rods until it blows and THEN build something half way nice

theunderlord

smart play dude.

tech@WS6store

iTrader: (2)

Why stop at 3.800 though. Put in some 3.898 pistons and make way more power with less effort. Iron ls1 is a great platform.

NalleyKy

It’s very possible. Not dead set on anything right now so I’m open to all suggestions and ideas

theunderlord

Take it to your preferred machine shop, have them inspect it, advise, and then have it finished to the biggest bore size that has forged pistons readily available and SEND IT.

omc8

iTrader: (7)

Yes agreed I say this all the time LS1 pistons cost no more than 5.3 Pistons now you may have to pay a double fee to have your block bored to go 120 over but you're going to have at least one fee in it anyway going over standard .

NalleyKy

thats the plan! Should be a fun little project

tech@WS6store

iTrader: (2)

Torque plate bore and hone at our machine shop is the same cost. You cannot (or really should not) hone cast iron .020 over from 3.780 to 3.800 so youre already paying for that service anyway, get it any size you want.

Also, DO NOT BORE THE BLOCK BEFORE YOU HAVE THE PISTONS, but also DO NOT ORDER THE PISTONS BEFORE YOUR MACHINE SHOP CHECKS BLOCK OUT.

We have customers do BOTH this year even though it was recommended against on the phone and they had to wait to swap pistons out. Do the foot work first so you can get it all done at once without issue.