[manbearpig]

Hey, was wondering if anyone has some disassembled rockers laying around that I could get some measurements off of real quick?

I need the diameter of the hole where the bearing presses in, the width of the trunion center, the overall width of the trunion, and the size of the bolt hole.

Thanks in advance.

 

[Lonnie P]

I just did a swap yesterday & it is already on the engine under a set of valve covers.

I had a Comp Cams set on the workbench for the past week.

I can give you the dimensions off of the factory removed bearings & trunnions if that helps you.
I just tossed all the parts in the garbage 2 hrs ago,

 

[manbearpig]

Yes, that would help. Thank you.

 

[Lonnie P]

I'll get you some info tomorrow.

The Comp Cams number on the new bearing is INA SN405, maybe you can track down the specs.

 

[manbearpig]

I haven't had much luck searching online. I was just going to grab a rocker from the junkyard next time I go if I couldn't get the info here.

 

[Lonnie P]

Corrected the part number sorry INA

 

[hit_4_show]

What are you considering? I replaced the stock trunions & bearings in my Trans Am’s LS1 with a Straub bronze kit in 2016 after one of the needle bearings came apart.

 

[manbearpig]

What are you considering? I replaced the stock trunions & bearings in my Trans Am’s LS1 with a Straub bronze kit in 2016 after one of the needle bearings came apart.

I'm trying to figure out of they can fit our be machined to fit into 2.2l rockers. The bolts are both M8x1.25, they appear to be very similar in size. My engine is going to be able to run north of 8k RPM, I'm trying to pick off all of the weak points.

 

[Lonnie P]

The dimensions of the factory removed parts are as follows:

Trunnion width inside the rocker .622"
Outside width of factory trunnion is 1.375"
Outer bore diameter of factory bearing .8125"
Inner factory bearing dia. .6195"

I do not have the outer width of the Comp Cams trunnion, but it is approximately .375" wider to accommodate the snap rings.

 

[manbearpig]

Thanks, appreciate that!

 

[Lonnie P]

A day earlier & I could have given you all the Comp trunnion dimensions.

I just installed this stuff over the past week.

 

[hit_4_show]

....My engine is going to be able to run north of 8k RPM, I'm trying to pick off all of the weak points.

2.2L? Naturally aspirated? Do you have a thread on this engine build?

 

[manbearpig]

2.2L? Naturally aspirated? Do you have a thread on this engine build?

Yeah, NA. Want to keep it simple, just upping the compression, cam, and high revving. I have a build thread for my truck, but it's kind of a mess. I switched to a different truck in the middle of it. Might do a thread in the 2.2l section once it becomes more than a pile of parts.

 

[twws]

A day earlier & I could have given you all the Comp trunnion dimensions.

I just installed this stuff over the past week.

View attachment 370973

i bought a set of those frankenstein heeads .i sent mine back and bought a set of promax 11 degree 245 catherdral port .with ls3 spacing

save 2000

 

[Lonnie P]

Why did you do that?