KENS80V

I thought I'd share a few pictures of the Manton style of trunnion upgrade. These are a bushing style of trunnion upgrade. The shafts are tool steel. The bushings have a lip on the outside. A shim is then spaced between the bushing lip and the C clip.

These are almost twice the price of the Straub bushing upgrade ($310). I like the fact they are tool steel and have the lip and shim. The trunnion shaft is also slightly larger with a thinner bushing.

KENS80V

In my opinion they would be the best style for rebuilding in the future due to the tool steel shafts.

CMY SIX

IMHO your better off with roller tipped rockers, love my crane gold race rockers

double06

I suppose these work on the LS7 also which seem to have less of a choice in aftermarket rockers.

Unreal

Great upgrade. I did the smith bros and so far so good.

Would not run any of the commonly available "roller tip" options. Downsides are too great when these work wonderfully and perform better.

realcanuk

Have nothing against stock with upgrades, but roller tips work great if set up properly. Using the same ones for 4 or 5 years through 2 builds with zero issues.

Unreal

They can depending on application, but people around here seem to think they are some magic upgrade, when depending on the setup, can have huge downsides with the increased tip weight.

realcanuk

Agree..... I'm pretty convince most problems come from guys bolting parts on and having now real clue. Stuff has to work together.

double06

If I had the choice and the extra money would go with those TD SS Roller Tipped Rockers they had on the SAM 800 hp build. They appear to be able to take the big spring pressure and they reved the motor to 8,000 + rpm. Expensive I think $1,200 but are a direct bolt in.

Brandon619

Manton makes a quality product. I just purchased a set of their custom pushrods and they superior to my previous aftermarket pushrods.

Unreal

I believe those are the ones you machine the heads for.

double06

I will have to look into that - bolt in or not. I thought I saw a picture with the factory stands but I might be wrong.

CMY SIX

what are the down sides" they run roller tiped on 10,000 hp top fuel cars bad tips are the least of there problems, mine been on 70.000 miles, bet you I have less valve stem guide wear then you do.

Unreal

Tip weight in way heavier than stock, weaker arm prone to fracture, arm flex.

I could give a flying **** about valve guide wear, but when I checked at 22k miles on my current 1200rwhp setup, there was no change or sign of wear. Zero, none, nadda. So if you heavier less reliable more expensive roller rockers that limit RPM and would never make it to 7500rpm have less wear than that, then they are magical and adding material back.

A nascar system and a bolt on cheap roller rocker setup is laughable. Might as well compare a matchbox car to a LaFerrari. Not even in the same ballpark.

xBoostx

I like them any time a possibility of failing parts is eliminated is good for longevity BOT as for me I use light weight all limitations removed parts only as lowest acceptable budget.