A new article with photos on the T/A & AAR rocker arms with a W2 / W5 rocker arm comparison

-
cid:653F2A72-D7C0-491D-A871-051A8DA0171C


Here is one picture. Damn I have to do them one at a time.
 
image.jpeg
image.jpeg
image.jpeg
image.jpeg
image.jpeg
image.jpeg
image.jpeg
image.jpeg


Here are the pictures of the bushed T-A rockers and the part numbers and the part number of the shafts. All these are new. NIB in fact. Let me know what you think.
 
yellow rose said:
View attachment 1715207353 View attachment 1715207354 View attachment 1715207355 View attachment 1715207356 View attachment 1715207357 View attachment 1715207358 View attachment 1715207359 View attachment 1715207360

Here are the pictures of the bushed T-A rockers and the part numbers and the part number of the shafts. All these are new. NIB in fact. Let me know what you think.
Click to expand...
If those are ta they look very much like w2s. But I have never seen a ta rocker.
 
Looks like an aftermarket version of the TA rocker arm for more RPM. They are bushed and have the oil hole for valve stem oiling drilled under the rocker tip pad to put pressurized oil onto the the valve stem versus dribbling out the top like the stock rocker arms. Same oiling configuration as the bushed W2 rockers.
 
Rocket said:
Looks like an aftermarket version of the TA rocker arm for more RPM. They are bushed and have the oil hole for valve stem oiling drilled under the rocker tip pad to put pressurized oil onto the the valve stem versus dribbling out the top like the stock rocker arms. Same oiling configuration as the bushed W2 rockers.
Click to expand...

They measure T/A offset not W-2. I'm stumped by the part numbers on the boxes.
 
is there an oil hole on the pushrod side under the rocker? looks like there is in that top right pic
is it just the pic or is there some rust (or is it cosmoline) on some of the pads?
I'll look at some of my DC catalogs tomorrow if no one else has come up with anything
any dates on the paperwork
cheers
and thanks for persevering on the pics :)
 
The rocker arms in the pictures above are W2 arms...
Here is a reference picture that I took several years ago due to the problem of people mixing up T/A arms and W2 and W5 arms.
The push rod offset on the W2 arms is a 1/4" further to the end of the rocker arm then the T/A arm is.
You need to always look at the push rod side of the arm when checking and not the valve side. That is where the difference is.

rocker arm TA.JPG
 
Last edited:
w2/w5 rockers have a .775 offset
T/A rockers have a .500 offset....

as said 1/4 inch difference.
 
and what are the 273 and stock stamped?
I'll write it down then forget where I wrote it :)
 
694spd said:
The rocker arms in the pictures above are W2 arms...
Here is a reference picture that I took several years ago due to the problem of people mixing up T/A arms and W2 and W5 arms.
The push rod offset on the W2 arms is a 1/4" further to the end of the rocker arm then the T/A arm is.
You need to always look at the push rod side of the arm when checking and not the valve side. That is where the difference is.

View attachment 1715207479
Click to expand...


Well then WTF? I have 2 sets of W-2 rockers and the rockers in the pictures have less offset than the W-2's.

Any one got an idea on what the part numbers are? Also the shafts in the pictures...I guess they could be any shafts but the holes aren't offset.

I'd like to know what the part numbers really are.
 
Possibly W7, W8, W9 head rockers?

Those are definitely not TA rockers.
 
What is strange is that the part numbers on the rocker arm boxes do not come up when searched. The three bushed W2 rocker arm part numbers were P4120200-1-2. So no match there.
This is a mystery to me. The box has a 1993 date on the side. I checked the 1988 DC catalog and a 1997 MP catalog, but came up with nothing.
 
I have versions of W2 bushed rockers that look the same as both pictures above and both have the .775 offset. When they press in the bushing it blocks all the oiling holes. They then pass the drill into the pushrod hole to drill through the presses in bushing. Next they drill a new hole under the nose to send pressurized oil to the valve tip. This replaces the top hole that is designed to dribble oil down the top of the nose. I believed they did this to only have one rocker arm for both the bushes and non bushes rockers to save $$.

Now I am not saying that the picture in the post above is or is not a TA arm. I am saying you cannot say that a W2 bushed race rocker can only be identified by not being drilled on the top for pushrod tip oiling.
 
694spd said:
What is strange is that the part numbers on the rocker arm boxes do not come up when searched. The three bushed W2 rocker arm part numbers were P4120200-1-2. So no match there.
This is a mystery to me. The box has a 1993 date on the side. I checked the 1988 DC catalog and a 1997 MP catalog, but came up with nothing.
Click to expand...


That's what has me stumped. I find nothing on the part numbers.
 
I'd like to sell the rockers but damn, I'm not sure what to sell them as. I don't want to sell them as W-2 and screw someone, or go the other way and sell them as T/A and they don't work on T/A heads either and screw someone that way.
 
$100.00 bucks for the lot plus shipping if no one can figure out what they are via the part numbers?

I do enjoy mysteries.......
 
You must log in or register to reply here.
-

Back
Top