cenTX-LS1

iTrader: (1)

I have an 02 z28 w/ 4k miles. At what mileage will the LS1 achieve max power and mileage?

conan

iTrader: (5)

Here's some reading materal for you http://www.sallee-chevrolet.com/Info..._break-in.html If you have 4,00 miles on it it should be broken in, take it out and give it hell

MNR-0

30,000miles, or 50,000kms

conan

iTrader: (5)

30,000 miles I puled my stock motor out for what I have in my sig with 29,000 on the clock guess it wasen't even broke in yet.

blkZ28spt

They do take a relatively long time to break in.

Racehead

Go run an open road race. When you cross the finish line it'll be broken in

cgworth

iTrader: (11)

thats for an older engine with a distributor

conan

iTrader: (5)

Other than adjusting the distributor and carb, what has gm changed about their break in procedure with the lsx?

XTrooper

And what does the distributor change in regard to break-in? There's nothing special about the LS1 or other GenIII motors when it comes to break-in. They are still internal combustion, ohv, pushrod motors. At 4,000 miles, it's as broken-in as it's ever going to be.