NemeSS

iTrader: (127)

muayyadf1

I meant instead of shooting for 1 1/4 turn I ended up getting 1 and half of a quarter.

I was screwed up of being under the car for most of the day having a lot of fun. You know.

zacht

iTrader: (18)

1 1/8????

mknight759

iTrader: (8)

interesting !! how many rpm or hp are the stock open face ls1 lifters rated for mine are new and i was planning on using them do i need to change to the ls7 and new pushrods or will i be ok i will be peaking out about 6200-6400

XtraCajunSS

iTrader: (2)

1 1/8 turns would be fine.

Shane

muayyadf1

Thanks Shane,
Regards

01ssreda4

iTrader: (96)

good thread!!

XtraCajunSS

iTrader: (2)

I have used LS7 lifters WELL past 7200 with spring pressures you would not believe. You will be fine...

Shane

printmanjackson

iTrader: (1)

how long will they last under those conditions?

muayyadf1

I think these lifters are very sensitive to preload. Too much means they will break very soon

Austinma62

Damn! This had me laughing for a good 5 minutes

muayyadf1

Good to know u r good in laughing.

printmanjackson

iTrader: (1)

could this be the reason for some of the LS7 lifter failures here lately?

indyboom

iTrader: (11)

I also laughed. Hooked on U.S. Standard worked for me...

MyFirstLS1

iTrader: (8)

Thanks for that info Shane. Best info I have read on lifters and figuring out pushrod lenth.

XtraCajunSS

iTrader: (2)

Thanks. I have never had a lifter failure in all my years of doing this. The only problems I see with stock type lifters is due to incorrect valvetrain setups leading to instability and lifter guides getting old and failing...

Shane

Gen2-LT4

Im usually not a necro bumper but since this thread is very highly ranked in Google I thought I would dig it up. Ive been doing some research as I detected the LS-7 pushrod cup depth myself when using Comp Cams pushrod checkers. I measured it with a micrometer and got 0.060 shallower. I used a different method that im not the originator of but I feel is far more accurate. It is however not something the LS guys will like due to the fact you have to pull the heads on LS motors, unlike SBC's to get to the lifters. This is why I only use it when building a new/custom motor on an engine stand.

But I wont go into further detail on that unless its warranted and would need to be a fresh post.

The reason for the reply here is Cajun's method is sound for one, "critique". The use of the torque wrench I feel only adds inaccuracy and variation between users. Once the rocker is fully seated/mated to the head, any further rotation of the bolt is only adding stretch to the fastener and not affecting lifter pre-load. I feel the procedure would be much more accurate if people simply hand tightened until fully seated.