Question on Comp Cam Rockers 1622-16

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72Dart6pack

72Dart6pack

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I recently bought Comp Cam 1622-16
Pro Magnum rockers. I have 8 rocker arms with a #1 & 8 with the #2 cast in to them as in the photo. Is one number for intake & the other number for exhaust? If so which is which? They came on the shafts in no particular order or reason. Can anyone help me out? Thanks!

20170812_193707.jpg
 
I think so also. But both shafts have 4 of each type. What are the mathematical odds of that happening? Going to send a Email to Comp Cams & ask. Im hoping someone else has noticed this before?
 
72Dart6pack said:
I think so also. But both shafts have 4 of each type. What are the mathematical odds of that happening? Going to send a Email to Comp Cams & ask. Im hoping someone else has noticed this before?
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I bought used the same rockers. No lefts or rights.

Spend the time lining getting the tips perfectly lined to the valve tips with shims and/or shaving sides of the hold down clamps.
 
Mancini has shims. And they are 4 miles from my house. I plan on getting a couple sets. They are not expensive.
 
The confusion will really begin if you look at the stock stamped rockers. There are left and rights of those!

As for the shims, yes they area good idea. If you don't reduce the sloppiness between the rockers, besides being somewhat mis-aligned, they'll be noisy too.
 
I'm happy with my purchase. They are quality parts. Not worried about alignment. More confused why I have 8 of two different casting numbers. I have written Comp Cams this evening already.
 
72Dart6pack said:
I'm happy with my purchase. They are quality parts. Not worried about alignment. More confused why I have 8 of two different casting numbers. I have written Comp Cams this evening already.
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You need to worry about alignment and geometry. They will both need work.
 
Should have said not worried about fixing alignment because I'll be using the shims from Mancini.
 
stumblinhorse said:
Bringing up a old post. Wondered if you heard back and how the 1622-16 are running in your build. I am looking to put these in my 390 stroker with ProMaxx heads.
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I’ve put 20K Miles on mine. I run a solid cam. Never had one go out of adjustment, but I’ve ran the valves half dozen or so times in that 20K Miles.
 
autoxcuda said:
I’ve put 20K Miles on mine. I run a solid cam. Never had one go out of adjustment, but I’ve ran the valves half dozen or so times in that 20K Miles.
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I like the looks of those. Keep us posted.
 
I do not think that OP and YR were on the same page as far as alignmnet
alignment of the tips and the stems
or alignment of the geometry
mancini shims do not do a thing for geometry
and watch the pushrod clearance while shimming sometimes you have to fudge the tips or clearance the pushrod holes
72 dart- did you ever hear back from comp?
 
stumblinhorse said:
How much lift are you running with that Solid?
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Just .502/.511” comp XE274-S

I was willing to sacrifice lightweight for durability.

This is what we did to prep/tweak them for install:

You do not need bananna grooves because the rockers have the large opening area in the center to hold oil. We noticed some of the bronze inserts were barely sticking past the rocker housings. Taking the extra step, we flat sanded the sides so they had more bearing area.

The holddowns are Mopar Performance

We had to fit the holddowns and spacers to get the rocker side to side spacing spec that Comp called for. They did not need shims as the hold downs were plenty wide and had to be narrowed anyways. Started with the center rockers and worked our way outwards.

When finished, each hold down and rocker was number and direction stamped to keep its fitted place. So if it gets taken apart in the future, the order and direction is handled.

1_16_11sm01-jpg.jpg


1_16_11sm02-jpg.jpg


1_20_11sm03-jpg.jpg


1_20_11sm06-jpg.jpg


Hold down fitting for rocker side clearance spec:

1_20_11sm05-jpg.jpg


1_20_11sm04-jpg.jpg


1_20_11sm08-jpg.jpg
 
Last edited:
autoxcuda said:
Just .502/.511” comp XE274-S

I was willing to sacrifice lightweight for durability.

This is what we did to prep/tweak them for install:

You do not need bananna grooves because the rocker have the large open area in the center to hold oil. We noticed some of the bronze inserts were barely sticking past the rocker housings. Taking the extra step, we flat sanded the sides so they had more bearing area.

The holddowns are Mopar Performance

We had to fit the holddowns and spacers to get the rocker side spacing spec that Comp called for. They did not need shims as the hold downs were plenty wide and had to be narrowed anyways. Started with the center rockers and worked our way outwards. When finished, each hold down and rocker was number and direction stamped to keep its fitted place. So if it gets taken apart in the future, the order and direction is handled.

View attachment 1715207613

View attachment 1715207614

View attachment 1715207615

View attachment 1715207616

Hold down fitting for rocker side clearance spec:

View attachment 1715207617

View attachment 1715207618

View attachment 1715207619
Click to expand...

Nice work, sounds like a great plan for getting the correct alignment. These would go on a .535" lift cam for me. So hopefully should be good to go if I get the right geometry.
 
autoxcuda said:
Just .502/.511” comp XE274-S

I was willing to sacrifice lightweight for durability.

This is what we did to prep/tweak them for install:

You do not need bananna grooves because the rockers have the large opening area in the center to hold oil. We noticed some of the bronze inserts were barely sticking past the rocker housings. Taking the extra step, we flat sanded the sides so they had more bearing area.

The holddowns are Mopar Performance

We had to fit the holddowns and spacers to get the rocker side to side spacing spec that Comp called for. They did not need shims as the hold downs were plenty wide and had to be narrowed anyways. Started with the center rockers and worked our way outwards. When finished, each hold down and rocker was number and direction stamped to keep its fitted place. So if it gets taken apart in the future, the order and direction is handled.

View attachment 1715207613

View attachment 1715207614

View attachment 1715207615

View attachment 1715207616

Hold down fitting for rocker side clearance spec:

View attachment 1715207617

View attachment 1715207618

View attachment 1715207619
Click to expand...


I number and direction all my crap too. I even have the number of shims between the rockers, the thickness and even the order I have them in.

Certainly makes it quicker when you have the rockers off the shaft.
 
Motor is done from this first post. 408 Six Pack now. But I'm doing body work. So motor is just in a crate now until I'm ready.

IMG_24941.jpg
 
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