What is your guyses experience with actual rocker ratio versus advertised.. I'm hearing with T&D .the ratio can be slightly higher than advertised.. has anyone experience this..

My 1.5 and 1.6 were almost dead on to spec

Nobody makes better rockers. Nobody!

Jesel does

I've seen .030 max lift difference at the retainers with both T&D and Harland Sharp 1.5 and 1.6 ratio single shaft systems
Not the same results with a set of Jesel 1.55 paired shaft system
The new owner at Harland sharp told me that they add some ratio to most of their sets to allow for deflection in the valve trains, which is usually mainly due to the cheaper pushrods is what I have found
I only buy the good ones now for all of my race motors

Most of what I use are the paired style TD
rockers and I have checked them at the retainer
and the paired ones were damn near dead on..
my cam was a little off but that was all.. I
do use a single shaft set also that were a bit
off.. thy showed 1.53

To me... they are equal

I know sometimes geometry and push rod deflection can play into the numbers.. I appreciate the feedback from everybody.. I'm making a rocker arm change and was trying to do some pre-planning

Jesel and T&D rocker arms tend to deliver the advertised ratio when using roller cam springs. Some other vendors don't. I've seen 1.70 rocker arms turn into 1.60 rocker arms when confronted by a roller cam spring.

Whats your plan of attack

Cam has always been ground for a 1.8.. and have been running a 1.6. And I'm now going to step up to a 1.85. This change is going to require different Springs.. but I think I will hold off on the springs until I get the Rockers. When I ordered them they said 3 to 4 weeks., I anticipate having them in a couple weeks

I think the only way they would be off is if the adjuster is hanging way out which is bad for oiling and everything else. If you follow T&D's instructions and buy the correct pushrods they should be dead on.

With heavy valve spring pressure you should always go with a bolt in stand and Paired Shaft Rockers (5/8" shaft).

The single shaft rockers have to much movement with valve spring pressures over 600lbs.

I would recommend anything with a solid roller cams should always run Paired Shaft Rockers (5/8" shaft)

I just bought a set of Jesel 1.85 for my W 9 heads i talked to both T&D and Jesel both were out like 4 5 wks and pricey but you get what you pay for

Mine are very close with actual spring pressure. However my bed plate is raised .060" over the desired 90 degree@50% lift rule.
Doug

I know cheap rockers say 1.5 or 1.6 but they really are 1.4

I've checked a lot of different adjustable rocker arms, stock and after market ductile iron as well as aluminum, some have more ratio and some have less
The stock 426 Hemi rockers where the worst, I saw over .100 variance lift at the retainers
It pays to check all of them

This is funny. It depends if you live on the west coast or east coast.

I have a set of T&D on my Indy EZ heads. Very nice.

If the geometry is not right, it doesn't matter what the max lift at the valve is. It won't be an accurate indicator of the true ratio of the rocker arm. For every degree of crankshaft rotation during the lift cycle, the cam is designed to move the rocker a specific amount. When the geometry is off, it doesn't follow the design of the cam lobe, and accurately relay that info to the valve. So what if it's dead nuts at full lift if it's losing everywhere else.

I have the Barton (T&D's) 1.6 rocker system on my 2ND Gen Hemi & they all seem to be spot on when we checked them all.

I thought Rays where Jesels

T&D all the way!

Customer Service rocks....👍

I remember reading about them when they first came out: the RBRE Gen II Hemi rocker setup was a joint-effort between Barton and T&D.

I still get the itch for T&Ds on my BB Victors now and then...

Yes, Mine are T&D's not Jesel's.

You should have come to Carlsle to see the custom ones I had on display. You would have gotten hives.

Well IMO Jesel and T&D are pretty much equal. The best stuff is WW but doubt anyone here runs them. As for actualy ration a lot of factors there. Deflection IS real to be sure, especially on mopar style shaft systems. The paird or individual rocker stuff tend to be more rigid for sure. Put BIG spring pressure on most all and numbers will change.