Kalehuawehe2646

So I've heard many different things about the compcam 875-16 lifter and need to know if it will work cause I'm about to pull the trigger on my cam upgrade...

I have a 2011 Tahoe with the 325 5.3L... I am going with the 146-456-11 camshaft 219/235 .607/.621 113lsa, 7955-16 pushrods, 26926TS-KIT spring kit... So there are two options for this set up for the lifters: 850-16 and 875-16. What do you all think??? Thanks in advance!!!

Jimbo1367

Kinda big for a 5.3 in a Tahoe isn't it?

1989GTA

LS7 lifter?

Kalehuawehe2646

Is it??? They said it would be good for my heavy car cause it kicks in down low on the band...

Darkman

iTrader: (2)

The cam specs do suggest good low-end, but the valve spring recommendation is the signature of aggressive cam lobes. The 875-16 lifters require a very light pre-load which in turn requires adjustable rockers to get right. With that much open spring pressure (from the 26926 springs) I would Morel 5206 lifters.

Kalehuawehe2646

What about just staying with the stock lifters???

Darkman

iTrader: (2)

If it were mine, I would not run either stock lifters or stock rockers in conjunction with those valve springs on a daily driver. That much open spring pressure (470 pounds) makes for an expensive valve train. It may well be that the cam does not actually require that much open spring pressure, which would allow different valve springs (preferably around 400 pounds of open spring pressure) and stock components. If that is not the case, another cam with milder lobes, and therefore lower open spring pressure requirements could make as much power (and low-end torque) and make use of stock rockers and lifters.

Kalehuawehe2646

Okay... Hmm... These are pretty expensive lifters... Morel 5206 lifters

Tin Indian

My opinion .... Too much cam for that engine. And your stock heads can't support that cam profile.

Also, there is no reason for you to need aftermarket lifters.

Get a cam around 215/220 .575/.575 with an LSA of 115 and an ICL of 113.

Kalehuawehe2646

I'm planning on port and polishing my stock heads... Does that make a difference???

Jimbo1367

tin indian's specs look a lot better to me for your application. I would have Martin Smallwood @ www.TICKPerformance.com spec you a cam. Why guess. Let a proven professional do it.

Darkman

iTrader: (2)

I don't pretend to be a cam guru, but Tin Indian's specs only work with headers, while the OP's chosen specs (in terms of duration and ignoring the cam lobe issue) look more appropriate with stock exhaust manifolds because of the split. I really don't see how anyone can recommend a specific cam here without more information.

Kalehuawehe2646

Okay well hereʻs my mods: LPP LT Headers, Airaid Jr Intake, Borla exhaust, and BB Tune... If that helps...

Sales@Tick

iTrader: (3)

I have a very nice 215/215 112 camshaft that I use in 5.3's run in heavier vehicles.

I would recommend that camshaft, a set of BTR dual valve springs, Morel 5315 drop in lifters and 5/16" .080" diameter push rods.

Jimbo1367

There you go. I'd run that Tick cam.

thanks for chiming in Martin !!