I just bought a set of brodix IK heads assembled the part number is 1021001.

The cam I am going to use looks like it is going to be using the XR294HR grind cam hyd-roller lifter and push-rod kit.

I am unsure of everything I need. I do want self aligning rockers but comp cams says the only one I can use is the 1412-16. why couldn't I use any other brand self aligning rockers.

Also do I need anything else at all other than a thrust button and wear plate? Is a thrust button and thrust bearing the same thing?

Do I need the comp cams distributor gear? or will my distributor gear work on my MSD pro-billet.

 

Comp is recommending 1412-16, they're not saying it's the only thing you can use.

You need a thrust button, a thrust bearing isn't necessary.

The MSD distributor gear should work fine.

 

Thanks for the fast response. When I put my specs into Cam Quest it says Engines with self aligning rocker arms must use part number 1417-16. Im not sure why maybe its an attempt to make more money.

 

Probably some sort of an oversight rather than a money-grab. I'm sure they wouldn't want you to use a $185 set of Magnums when they could sell you a $320 set of Pro Magnums instead.

 

Hmmm. Well in that case I am still unsure of what rockers to get. Id rather not grab the magnums but if I have to I will. Still waiting on a tech response. Thanks

 

Well I just got done speaking with the tech from comp. He said that I can use any brand self aligning rockers, but why use an inferior product. lol?

Also he said as far as the thrust button and wear plate I would have to machine the back of the timing set. I could also get away without a wear plate.

The pro-billet gear will be fine as well

Thanks

 

You'd have to machine the sprocket and/or the block to fit a thrust plate, but you don't need one. That has nothing to do with the thrust button.

 

Right. So the consensus is that I don't really "need" a wear plate? I can get away with just a thrust button and no machining?

 

You don't need a wear plate. A flat tappet cam has a constant rearward thrust pressing the back of the cam sprocket against the front of the block, they run for hundreds of thousands of miles without wear plates, and still you never hear of anyone finding any wear there. A roller cam has even less pressure in that area.

 

Awesome thanks so much for the help Apeiron. Big ups to comp cams for being so easy to deal with. Great customer service.

 

It's because Magnums supposedly fit under the center bolt valve covers with no issues.

 

Let me be the first then.

Years ago when I was building 8 sec BB engines for several teams in the Chicago area, a couple of their blocks were back-walkers. They were all mechanical roller cammed engines. The timing gear would eat the HELL out of the front of the block. Ground in the prettiest circles you'd ever want to see, LOL.

The fix, back then, was to have the face of the block machined for the clearanced needed to fit a 3-piece Torrington bearing. That solved the problem, but, obviously called for an engine tear down. PIA.

Only explanation I ever saw for that was how the lifter bores were machined at the factory. Nowadays it's normal in racing engines to have them checked and corrected as part of the engine build.

Cloyes, and probably others, now make a timing chain set that comes with the cam gear already clearanced for the Torrington bearing, which comes with the set. So it's a direct bolt on.

Just my experience.

Jake

 

Also, I STRONGLY suggest you re-think running self-aligning rocker arms, especially with the cam you've chosen. Plenty of guys are reporting their SA rockers not being able to remain centered over the valve stem at the higher rpms. They're jumping off and causing collateral damage elsewhere.

One of the advantages of visiting other Forums is to get a broader view of what others are experiencing with their engines. When you visit other Forums, as I do, you'll see posts and photos of SA failures. Even CompCams says they're not recommended for performance applications.

Just thought you'd like to know.

Jake