Comp Cams new rocker arm setup is here

[andyf]

Looks great. The stands appear to be cast aluminum rather than billet so they must be planning to sell a bunch of these. Very nice machine work from what I see so far.

[andyf]

Also got a SCAT rotating assembly to build a 482. The SCAT crank and rods are nice but the Mahle pistons are super nice! Metric ring pack, strut design, coated, etc. Killer parts for the price.

[XR7]

Rocker assembly look interesting. What is the diameter of the shaft, and what is the width of the rocker bodies? I like that they have a little offset to the adjusters. The stands look similar to Erson's as far as layout, look stronger though. Are the stands cast iron?

[andyf]

I assumed the stands were aluminum but I checked with a magnet and they are magnetic. So they are either cast iron or cast steel. The finish is very nice so it looks like a high quality casting, maybe investment cast? Here is a closer look at the stand.

I'm not sure on the shaft diameter, I haven't taken a unit apart yet. The rocker width appears to be just a little less than 1.200 inches.

[e philpott]

they sure look nice , it will be interesting to see what BBB ( Brent , Blair and Barry , lol ) say if they have had some to play with yet

[andyf]

Comp said I got the first set shipped out the door so it might be a while before other engine builders start getting them. Summit does show CCA-19046 as a good part number but they don't have a picture available yet and they are not in stock. $1250 from Summit.

[blykins]

Personally haven't seen one, but I probably won't when you can buy both T&D systems for that price. 

On most of my street hydraulic rollers, I've been using new non-adjustable style rocker sets.  On a solid flat tappet I would go to a T&D street and for anything over that, I wouldn't go with anything less than a T&D race set.   Been bit once and that was enough.

BTW, I'm not trying to poo-poo on your nice looking rocker set, but at that price, I would have a hard time trying to explain to a customer why they should pay $100-150 more over a set of T&D's.  The Comp set is still held down by (4) 3/8" studs and that's where the weakness lies on a hipo (read solid roller) FE. 

Are you the same andyf that's on ST with a Mopar build here and there?

[andyf]

True, it is only 4 bolts holding it down but the big steel casting seems rigid enough to handle the load. We'll find out once the engine is together. This 482 inch FE is getting a XR292R Comp street roller cam so we'll be close to 0.700 lift. Not sure how high the engine will spin, maybe 6800 RPM? That should be enough to put some stress on the valvetrain. Not sure where the power will end up, maybe 650 hp. Tunnel wedge intake with Edelbrock carbs.

Yep that is me. I'm mostly a Mopar guy although I was a Ford guy before I got into Mopars. I bought a '56 F-100 when I was 14 and swapped a 351C-4V into it when I was in the 10th grade. Had to do the engine swap by myself since my dad wasn't really into cars. We also had a Torino Cobra with a 428 CJ and 4 speed that we bought off a used car lot for $500. Probably be worth a bit more than that today if we had kept it!

[blykins]

I pulled two  stand  studs out of a pond aluminum head with only 600 pounds of open spring pressure. Once that happened I switched to a more solid rocker arm  with all of my solid rollers.

Depending on how much cylinder head you have you will  probably peak the horse power down around 6000 to 6200 RPM.  My 482 engines with 330 CFM heads and mid to high 240s at .050" duration hydraulic roller will peak  at 6000. You will lose some duration to lash.   In my experiences with a 482 it takes a solid roller cam with duration  in the mid 260's to get the peak up to 6500-6700.

 I have never played with a Mopar engine before but one of these days I will try to get some experience with them.

[fekbmax]

Was that with helicoils or had they been replaced with inserts  ?

[blykins]

Helicoils. 

[andyf]

My 470 inch Mopar engines peak at 6800 rpm with Trick Flow heads and similar cams so I'm just extrapolating but it isn't apples to apples. We'll be using the new Trick Flow FE heads as soon as they ship so the power curve will probably be unknown until we get it on the dyno. Trick Flow might have some dyno time on the heads but I don't think anyone else will at that time.

If the power peaks at 6200 then I doubt we'll hit 650 hp but it should still be a fun engine. Engine is going in a 63 1/2 Galaxie so we can't get too radical with the cam! Need to keep it somewhat street friendly.......

[blykins]

FE head flow and Mopar head flow are not quite the same....

[Barry_R]

Overall appears to be a very well thought out product.  Might be nicer than the T&D street package which I use a lot of - but should be since it costs more and took several years to release.  I had some early design input on these - really more like answering a few questions and provide some ideas.  I have not gotten a production part yet.  I did look at them at PRI and had some comments, which they answered well.

The stands are steel castings.  I questioned the "kerf cuts" in the stands, similar to OE 427 parts, and was told that they were necessary to clamp the shafts since the stand material would not deform under bolt torque to provide the clamp.  The clamp effect is necessary as I discovered on a different build a while ago.  They also provided some FEA data to support the statement that the steel was strong enough to support rocker loads even with the cut in there.

The above noted, I will agree with Brent that the T&D race setup is without question the best way to go on a serious solid roller.  I have pulled the rocker threads off the heads on a couple solid roller deals and repaired them with huge hand made thread inserts.  The T&D deal fixes all the questions and seems to be near bulletproof.

Unless you are modifying the lifters for rules reasons you will want to design a hydraulic roller FE to peak somewhere around 6000 or 6200 in most cases, since that is where the lifters go nuts.

[TomP]

Nice looking setup for sure. I pulled the threads out of the iron Hi Riser head with 600+ roller springs but I've run it since like that with a Helicoil in it. That was with stock iron HR stands.
I think the Comp setup could be trusted for most valvesprings, but maybe not big rollers.