SN-LSX

Why all the negativity about 875 lifters? Is this a bad choice over the 850's or?
Is a 295 melling enough for a performance application?

JakeFusion

iTrader: (7)

875 are a lot of work to get right and then you're not really getting much over the 850/LS7s. Try the BTR SLR Lifters or step up to some Morel 5290s...

PREDATOR-Z

The 875s accept light preload which usually require adjustable rockers to get right.

3rdCoastPowerSports

iTrader: (5)

Predator-Z what is the advantage of the light preload???

sorry to sidetrack

LilJayV10

iTrader: (39)

Quoted for truth. My friend ran these in his LT1 and I couldn't figure out what I couldn't get the valves adjusted correctly.

Darkman

iTrader: (2)

The preload for the 875 is not only "light" it is also narrow. The recommended preload is 0.002" to 0.004" with the engine warm according to the Comp Catalog. Hence the need for an adjustable valve train.

LilJayV10

iTrader: (39)

I think it was like a 1/16 turn or something crazy like that, its been several years since i've adjusted them.

blackdak318

iTrader: (3)

Sorry for the bump from years ago but has anyone tried the ZZP LSx lifters? They say they are modeled on the 875 but with more preload for easier use.

I just grabbed a set for Black Friday on sale as they are very legit price wise and have great reviews. https://zzperformance.com/collection...ler-lifters-16

blackdak318

iTrader: (3)

Following up here just in case someone stumbled across this thread using a search function or Google, like I did. The above referenced ZZP lifters are JUNK. I got them, opened the package, and immediately started rolling the wheels. Literally the very first one I rolled was chunky and not smooth at all. 3 out of the first 4 I tested were not smooth at all and I just stopped. I had talked to a buddy of course the day after ordering, who is a big 3800 guy and familiar with ZZP. Right away he said I would not use those, they're likely just parts store generic lifters reboxed. I agree and regardless, I would NOT run these in ANY engine. I ended up ordering the Summit branded Morel 7717's. Every single one of them rolls 100% smooth. In short - do not buy these LSX lifters from ZZP.

G Atsma

Good heads up! Thank you!

blackdak318

iTrader: (3)

Happy to help. I got duped because they have good info on their website about them, and pretty stellar reviews. But after looking into ZZP more, I honestly wouldn't be surprised if they were moderating reviews and deleting any of the negative ones. The price alone tells you there is no way these are some special lifter. It's just impossible considering they are half the price of the Summit morel units. They have to be just bulk generic lifters. ZZP is also known for doing that and slapping their label on it trying to make things out to be more than they are.

91 Z28

iTrader: (3)

Hmm I've got said ZZ lifters in my engine and they all turned smoothly. I also got them years ago too. But then again good lifters fail just as much as the off branded units do. Everybody rolls the dice in one way or another

blackdak318

iTrader: (3)

I agree that "budget" lifters are all a crap shoot. I don't agree "good" lifters fail just as much as the off branded units. Johnsons, and several other name brand link bar lifters all seem very good and I would have near 100% confidence in. But yes if you're talking a $225 and below drop in set it seems like you never know what you're going to get. I do have a little higher confidence in the Morel 7717 units I grabbed but also wouldn't be shocked if they had an issue.

I was very surprised the ZZP lifters I got were not good and 3 out of the 4 I tried would not roll smooth. It was a hard bind too not just oil or wax or something in there. It was like the tolerance for the needle bearings on the roller was too big and they were able to move and bind up against themselves. I had to let off pressure and roll it slightly backwards then attempt to roll again to get it to move. After seeing that it was a HARD pass from me.