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I've just been extremely busy with parts shortage backlogs. Finally clearing out some of the stuff from late last year, so once everything settles down a bit, I'll try to get a thread started. That's why I've been so scarce around these parts lately.

I guess I really don't understand the general point.

They did address the rocker stands, and they are a lot closer to optimal. But, there is no "right" stand height for every application, so they have just made it a lot closer. More than can be said for all the other manufacturers that simply copy a factory head, which was never designed for a...

Getting rid of the single shaft doesn't fix geometry. It just allows stand adjustability, which can aid in correcting geometry, and that is provided the rocker is designed right. Figure in the machining of the heads, and the lifter bore bushings to pushrod oil, and combine that with the...

I guess it would depend on the engine builder's definition of geometry. I know the stand position on the Indy heads is waaaaay off, so no rocker by itself will correct that. Now, move the shaft where it needs to be, and then a properly designed rocker can be made. Something that no off the shelf...

I have a build in the shop now with a set of 360-1's, lash caps and all. I'm trying to convince him to go with the rockers we have so we can eliminate all the poor geometry nonsense.

You might want to contact me before you make that decision. If you are interested in good geometry on an Indy head, it would be well worth your time. Oh, and I won't insult you, or your mother. P.S. Don't wait until the last minute. Things take more time than usual these days, as I'm sure...

I'll let you know when I'm done with them. I might just start a new thread on what I've found and how it was addressed.

I can't say I disagree with what you have said. Once you get into complex 3D machining, there is a lot of cool stuff you can do. Inverse feed rates, if I'm remembering the terminology correctly, makes my head want to explode. But, it's obvious that is not what is being used for machining the...

Here is an as cast head with the same thing. N o consistency from one head to the next.

I'm not sure. Usually, a ball mill will leave a distinctive machined pattern that I haven't seen on the OEM heads. Maybe the stands were bored through after casting, and then the excess stand milled of to where they decided to finish them. I don't know. Somebody who worked for Chrysler may have...

Either way works, but with the removeable stands, it still isn't a one size fits all approach. They still have to be made for your specific engine's requirements (height and offset), just like the bolt on kits.

How are you positioning the head to do that. If the head is mounted longitudinally in the X axis, the how can you interpolate a radius in the Y axis, using a G02 or G03 interpolation in the Z axis, without at least 20 interpolations per stand? That is figuring on a 1 inch wide stand with a .050"...

I have a set of ProMaxx here now, and they are machined differently. That doesn't mean they can't have some QC concerns as well in other areas.

Not really. It isn't a true radius. It's actually a double radius from the smaller ball mill making two passes with a stepover. Be tough to recreate, especially considering they can be different from head to head. It's easier to just re-machine the stands to the correct radius and be done with it.

I agree, and when I said a single pass, I was referring to no stepover. I have a CNC machining and programming background myself, and a second spring cut would be needed to give a nice consistent finish. Interpolation will work, but they aren't going to make 20 passes on one stand to make the...

The saddles seem to be consistent, in a bad way. In a production machining environment, a pass would be made across the saddles from one end of the head to the other, and then a stepover and a return pass back to the starting point. Why they don't use a 7/8" ball mill and make one single pass...

Maybe he misunderstood when I talked to him about it. Yes, they use something along the line of a 3/4" (19mm) end mill, but they step over and make a second pass to get the width, which is all over the place from head to head. The problem is it makes the radius shallow, and leaves a high spot...

I used to make the kits for the Speedmaster heads until bad things started to happen, and ONLY on the Speedmaster heads. I'm sure I did yours prior to that knowledge and experience. Keep an eye on the bolts that they are staying tight. I have a brand-new set in the shop that looked like they...

No, it's not a "down under" thing. There are a lot of Aussies that are running our kits, and also an Australian Pro Stock team running our custom rockers with the stand corrections. It's strictly a Bewy thing. Bewy likes to reference stuff he reads, and then make it conform to his own ideas...

Minimum sweep, including on the pushrod side. Rocker ratio doesn't go anywhere because it's designed into the rocker. Pushrod angles reduce lobe lift input. Proper geometry increases stability, efficiency, and reduces harmonics, etc. etc.. Seems I've heard this stuff before somewhere, but I...

Looks can be deceiving. Most SB TF corrections do not have offset, even though it looks like it does. It's the way they are machined for fixturing purposes that makes it look like they have offset.

Actually, I said the small blocks were the closest I've seen, but unless you are running .700" lift, and more with a HS rocker, they still need some correction.

The only way to know for sure, is to give me some specs from your motor so I can do the math. Email me requesting the instructions, and I'll send them to you. I'll be on vacation next week, so it may be the following week until I can reply.

With a roller rocker, believe it or not, no. The stand position is copied from the factory on most aftermarket cylinder heads, which is engineered for a stock rocker, stock valve, stock cam, etc. The roller rockers have different geometry, and need to be moved. There is one exception. I had a...

I like a bushed steel rocker for most street or street/strip applications, and use a lot of the PRW rockers because they have multiple ratios vs. Comp. They are far better imo, than the pricey aluminum rockers recommended for these heads. As with any rocker, they need a little adjustment to the...

Not without a lot of work. It's a performance head, designed for a performance rocker, not an aluminum copy of a stock head like many others.

Every kit is custom made to your engine specs, so no, there aren't any in stock. I would have to get some info from you and make the kit, so there is a short manufacturing lead time.

The aluminum rockers with the ball adjusters seem to be worse than the steel rockers with cup adjusters. I haven't been able to check every rocker out there, b UT that seems to be the trend.

It would have to be after Carlisle. I've got a lot to get done in the next few days, but I could get some after I get done with the show.