Eddy rpm heads with arp studs question

nm9stheham said

I think the bottom line is that those who have done this before you have not ever reported any issues. I was concerned over it at first, but computed all the flow areas at the restrictions in the path and this one is no smaller than the others when you put in the stud. There is a restriction between the rocker hold down bolt and the hole in the rocker shaft over that head passage that is just as small or smaller. Again, there is not real 'flow' in this passage it is just 'spurts' over and over. If you are running 7-8k RPM a lot, like in circle track racing, then every restrictions has to be looked at, as the 'spurts' get 'leaner'.

BTW, the roller pattern being centered on the valve stem is not the indicator that you look for, for best geometry. It does not have to be centered, regardless of what the Comp site says LOL. But that is another can o' worms.

Click to expand...

I’m just going off of what the guys at Hughes engines is telling me for rocker roller contact on the valve stem. Hughes website says in a tech article, for best valve train geometry, the roller should be centers on the valve stem. Everything about my motors valve train is Hughes engines. This motor will spend a good amount of time up in the 7k+ rpm range, so I guess I will have to figure something out for the rocker oiling situation. I don’t think it will get enough oil up top. Also, the eddy rpm heads are only temporary, and will be for sale soon. I will be ditching the eddy heads for a set of trickflow power port 190 heads and intake manifold in the near future. When I bought the eddy heads, trickflow hadn’t released there power port heads yet and I thought I’d have this motor in the car and running before trickflow released the power port heads, so I went with the eddys just to get it up and running while I wait for the trickflow’s. I also had my tremec tko 5 speed transmission that this motor will be bolted too, built to handle 6500+ rpm shifts.