turbonola

If I get ls7. Lifters do I need to do the triunion upgrade?

alexus6798

iTrader: (24)

NO, the trunion upgrade is not a must.

turbonola

Good to know, thanks for the fast response

alexus6798

iTrader: (24)

no problem..

sjsingle1

iTrader: (1)

the comp cams trunnion upgrade? it is a MUST in my book

Codytaylor90

Wouldn't hurt if u can though nice safety measure especially if your pushing high horses

Burken01

iTrader: (88)

I know a lot of people that haven't and they have been good! If you have the cash go for it!

vettenuts

iTrader: (4)

The two are unrelated. LS7 lifters are nothing special, just the standard GM lifter. The trunnion upgrade addresses the issue with dumping bearings and tightens up clearances in the rollers. However, GM did fix the rocker design later so depending on the year of the rockers the trunnion upgrade may not even be necessary.

john563

iTrader: (17)

ls7 lifters here and NO trunion upgrade..been that way for bout seven years H/C/I..not gonna hurt you to upgrade though..at the time when i put the ls7 lifters in no one was doing the trunion upgrade

sjsingle1

iTrader: (1)

i dont know what yr GM changed the bearing design in the rockers......but when i did my upgrade the stock bearings practically FELL out of the rockers......no wonder they had that problem of shedding bearings into the engine

TDCRacing

FWIW,

Be sure to check pushrod length after installing the lifters. The pushrod cup depth (where the pushrod sits) is a different height than a ls1 lifter.

Ls1 lifter - higher cup depth
ls7 lifter - lower cup depth

turbonola

Some good information in here. Thanks guys. I do plan on bouching the motor off the rev limiter. It's going in a 240sx just for drifting.

Mell00

The LS7 lifter has a ceramic check ball in it. The stock LS1 has as a steel check ball.

greenturtle05

iTrader: (6)

So does anyone know what year GM fixed the rocker problem?