ls2 lifter trays and ls7 lifters
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TECH Apprentice
Joined: Dec 2010
Posts: 325
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From: canada
ls2 lifter trays and ls7 lifters 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.
11 Second Club
Joined: Dec 2002
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From: long island, ny
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.
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
Thread Starter
TECH Apprentice
Joined: Dec 2010
Posts: 325
Likes: 1
From: canada
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.
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11 Second Club
Joined: Dec 2002
Posts: 1,498
Likes: 10
From: long island, ny
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
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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
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.
ttp://www.ls1tech.com/forums/generation-iii-internal-engine/1285114-damaged-lifter-pics-2.html
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.
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.
