super mario

so I bought ls7 lifter from a guy and I noticed 1 was different...so I have 15 Ls7 lifters and 1 stock one..if I run it like this will it cause a problem? Or should I just go buy a whole new set?

oChristiano

iTrader: (6)

You can buy them individually I believe from GMPP.

GT_EATR

iTrader: (1)

Will the LS7 lifters work fine with the stock pushrod length? Anything else required for LS7 install?

StormesRacing001

iTrader: (5)

The LS7 lifters are taller so you will need shorter PRs. I recommend picking up some LS2 lifter trays as well.

Cold06

iTrader: (9)

I would get a new set seller seams suspect, they sell any where from 115-150 a set.

Ethan[ws6]

iTrader: (13)

LS7 lifters are a direct replacement for the LS1 lifters. I have put them in a couple of cars without changing pushrod length.

GT_EATR

iTrader: (1)

Ok so i have the standard 7.400 pushrod length and they're forged from TSP..so will they work with the LS7 lifters?? or do i need to purchase shorter ones?? if so what length??

MyFirstLS1

iTrader: (8)

i would personally call TSP.

or get a pushrod tool to check length

Ethan[ws6]

iTrader: (13)

If you are running the 7.400's right now and they work for your setup, changing to LS7 lifters will not change anything. They are a direct replacement.

2000ls1tranz

iTrader: (1)

i have ls7 lifter an tsp told me they are a taller lifter so yea it could maybe change pushrod size...mine changed but i also have heads and cam

stangtrader

iTrader: (2)

Here's my input. A very trusted sponsor of the site said stock length is fine.I measured mine just to be safe for my cam and came up with 7.310 and went with .090 preload for my valvetrain to be quite.works just fine. And lastly GM doesn't put different pushrods in when they replace them.so if you have a stock cam you'll be fine but you could measure just to be safe

GT_EATR

iTrader: (1)

Well Im running the MS3 cam but I'm still using the stock rockers and stock lifters.. I was jus worried about pushrod length..

TurboStangJON

iTrader: (27)

I have LS7 lifters and bought them when I bought my heads and cam from TSP. I was told to measure lifter preload and after I ended up with a 7.40 pushrod length. It's been a while since I did my swap but I believe I ended up with .060 lifter preload.