GR33N GoblinM6

iTrader: (14)

Turns out i had a lifter failure.. no matter what i did to adjust it, it was never enough.. so i couldnt find any stock LT1 GM lifters and didnt want to risk buying aftermarket, i decided to go with LS7 GM lifters part# 17122490

Here is a comparisson photo of some of the differences

1st thing i noticed that the LT1 lifters at the roller end are bevelled upwards. Possibly to allow clearance for larger cam lobe angles??


New LS7 lifter


side by side comparisson with LS7 on top, LT1 below


Cup comparisson, i didnt measure the depth, but inperson you can clearly see the LS7 cup is shallower and the LT1 cup is deeper.. not by much though



just posting this since no one has posted pics.. at least not that ive seen..

93M6Formula

Interesting. But I don't understand why you say you didn't want aftermarket. Morel or Crower and quite a few other companies make quality lifters.

GR33N GoblinM6

iTrader: (14)

my experience with "some" aftermarket pieces have been subpar. I just wanted something i know would work and fit, and was OEM.. i dont want to have to tear into the engine again, plus i got these for $99.. so if aftermarket is more or the same price..im choosing these.

guppymech

iTrader: (7)

Did you find it necessary to change the PR length to compensate for the higher pr cup in the LS7 lifter? Or is this a non-issue.

WS Sick

I used the LS7 lifter as well and din't find the need for a longer pushrod, the valvetip pattern was well within the fudge range.

RamAir95TA

iTrader: (2)

I personally can't see any measurable difference in the pushrod cup. Can you take some real measurements instead of eyeballing them? Is the stock LT1 lifter "pumped up" (the plunger at the top of its travel)?

I know I went from OEM to LS7s and didn't have to change PR length either.

lt1slowz28

morel quality lifter, with a little bit of seat pressure.

lt1-xjs

Sorry, but it looks like a POS for a so called quality name.

warriorcustoms

iTrader: (10)

LS7 is GMs replacement lifter for the LT1 You can still find stock Delphi lifters for like 90 bucks Prolly get a set of one or the other for my stock LT1 build But the 396 LTx is gettin Comp Endure X or Crower solid lifters That Morel looks a little fxxxked up What wiped it out??? A little trash??

lt1slowz28

thinking a little much seat pressure from the springs, pretty much all of them got like that.

Puck

iTrader: (17)

How much is a "little much"?

They should be good for well over what most street cams would call for. Was it just that lifter or multiple? How did the lobes on the cam look?

Just curious is all...I have the newer style Endure X pressure fed lifters for my SR and they will also be under a "little much" seat pressure and I'm not worried at all .

96RamAirTA

iTrader: (6)

That was all the lifters in my buddies 418 ls3 ta

warriorcustoms

iTrader: (10)

Yeah my solid is gettin triple springs Either gettin the Crower or Endure X but ISKY & Lunati would work too!!! Guess Ive been freeze dried & not in the loop on what all the Kool kids are runnin nowadays How longs Morel been around??? They made in the USA??

guppymech

iTrader: (7)

Up till the auto manufacturers started using roller lifters to reduce friction hot rodders used them because they could follow radical cam profiles with high spring loads that would ruin a flat tappet or mushroom lifter. Roller lifters are less tolerant of valve float though.

gregrob

iTrader: (8)

My Morels are fine.

bufmatmuslepants

iTrader: (3)

Thanks for the pics! Does anyone have an idea of what a typical or good price for each brand of lifter just to add that comparison to this thread? Or I'll just do it when I get to work. Do any of the brands require new pushrods lengths?

bufmatmuslepants

iTrader: (3)

Would be nice if we could put together something like this and put in the valvetrain sticky. I dont know a ton about lifters, but this is what Ive dug up in my searches. If anyone has info to add, please do. Also, please do your own research before making any purchases to verify my information.



Lifter: LS7 stock replacement lifters
Country of origin: USA
Part Number: 17122490
Price: $139
Where to get: Texas Speed or other retailers, GM Parts Direct
Need new pushrod length: No
Pros: Price, used in LS7 7000rpm motor from the factory
Cons:

Lifter: Cadillac Race Lifters
Country of Origin: USA
Part Number: 88958689
Price: $290
Where to get: Texas Speed or other retailers
Need new pushrod length: No
Pros: designed to go 8500 RPM in race cadillac CTS-V
Cons: Horror stories of oil pressure problems

Lifter: Comp Hydraulic Roller
Country of Origin: USA
Part Number: 63-850-16
Price: $210
Where to get: Texas Speed or other retailers
Need new pushrod length: No
Pros: been around for a while, designed as direct factory replacement
Cons:

Lifter: Comp R Hydraulic Roller
Country of Origin: USA
Part Number: 63-875-16
Price: $228
Where to get: Thunder Racing, Summit, etc
Need new pushrod length: No
Pros: designed for higher RPM than standard Comp lifter
Cons:

Lifter: Morel
Country of Origin: USA
Part Number: 5206
Price: $500
Where to get: Thunder Racing and other retailers
Need new pushrod length: Yes, 0.5" shorter
Pros:
Cons: High Price

WS Sick

Those Morel lifters look like the cams surface hardening failed and messed up the rollers.

reservoirdogs12

Would the LS7 lifter be an AC Delco product? I'm planning on replacing a noisy lifter on my lt1, and the only brand I recognize (and trust) on rockauto's website is 'Delco.

Puck

iTrader: (17)

+1, which is why I asked how the cam lobes looked...