spiro27

planning to do a head and cam or a cam. just dont know what the difference is beteween ls1 and ls2 lifter trays and will ls7 lifter work. are they a good upgrade ower stock one foe 500hp.

Lambert695

iTrader: (17)

ls2 trays with the ls7 lifters would be an upgrade for sure

jerflash

ya the ls2 trays and stronger and the lifters are less likely to under power. The LS7 lifters are great pieces. I installed both when i put some new heads on my car. I also for extra insurance in the oiling department drilled 3/8" port holes on the back side of the lifter trays to stop oil buildup at high RPM. with preload set right i have no noise from my valvetrain now.

spiro27

do the ls2 lifter trays bolt into the ls1 exatly the same. the ls7 lifters good for 500 hp.

CRAZZ28

iTrader: (13)

Im not really sure that changing out lifter trays will help you at all. The ls7 lifters are the GM replacement for all ls based motors. Lifters arent really hp rated per say. high RPMs and heavy valvetrain is what you have to watch out for with lifters. As long as you arent putting some super crazy springs on it and revving to 8k rpms the ls7's will be fine

jerflash

well getting new lifter trays are cheap insurance. every time you change your lifters you should get new trays. they are only 7 bucks each at the dealer...dont cheap out

spiro27

so if i plan on putting ing dual bee hive springs the ls7 lifter wont hold up? i thought they were go to 505hp like the z06. withch one should i use for 500rwhp. or shoud the ls7 be fine. with are better. thanks.

jerflash

there are no such thing as dual beehive springs...either dual or beehive springs. i have dual springs good for 650 lift and i run ls7 lifters up above 7000. its all about how you set the preload and matching parts

djfury05

iTrader: (30)

Obviously you've never had an LS1 lifter tray and LS2 lifter tray in your hands at the same tiime. The ls2 trays are much sturdier and stronger than the LS1's. You actually have to use some force to set the lifter in the tray with the LS2's instead of just dropping it in like the LS1's do. The chance of turning out of alignment is greatly reduced with the newer LS2 trays. They are like $35 for 4 of them. This WILL help him, maybe not in the power department but in the insurance department for sure.

rcoers

iTrader: (6)

What vendors sell LS7 lifters and LS2 trays?

jerflash

you could just go to your dealer...they are actually pretty cheap there but most all venders sell them

CRAZZ28

iTrader: (13)

Just wondering if you have ever had a lifter "turn out of alignment" as you say. because i sure havent. If the ls1 trays were a problem im sure GM wouldnt have waited until the release of the ls2 to fix it.

Darkman

iTrader: (2)

ttp://www.ls1tech.com/forums/generation-iii-internal-engine/1285114-damaged-lifter-pics-2.html

CRAZZ28

iTrader: (13)

well the first one was a defective lifter, and the guy with the problem on the second page sounds like it was caused by a rocker arm backing out since he said it was loose and only holding by 2 threads.
Just think about it, there is nothing putting rotational force on the lifter. The trays may well be weak but without another critical engine failure they will do their job 100% effectively.

Darkman

iTrader: (2)

^^^^^^^^
You must be right, GM should have never changed its lifter trays - the LS1 design was already overkill.

1QWIKBIRD

iTrader: (25)

There absolutely are rotational forces being applied to the lifter. Every roller lifter has some sort of mechanism to prevent the lifter from rotating. Link bars of various styles are common for aftermarket lifters and the factory used "crab" style trays on the TPI/L98/LT1 factory roller cam motors. Flat tappet lifters, hydraulic or solid, rotate in the their bores as a result of the lifter face riding on the face of the lobe. A roller lifter would do the same without something to keep the lifter from rotating.