FE Power Cylinder Heads

[TomP]

Am I noticing another issue.... the pushrods are blocking the manifold bolt holes!

[mbrunson427]

thought about that to. But since the rocker moves with the pushrod and lifter,,,,,
I dont think it reduce the lift and alter the angle

Thinking......... 

Being that the lifter is locked into a pure up/down movement and the rocker arm is locked into a pure up/down movement, yes that's right, it wont alter lift. What will happen is the lifter/rocker arm will have added stress on it because they are limiting that side-to-side movement that the pushrod would like to move in.

[e philpott]

Am I noticing another issue.... the pushrods are blocking the manifold bolt holes!

I think it might just be an optical illusion of the software

[Dumpling]

What effect does the angled pushrod have on the lifters riding the cam lobes? Roller lifters?

[cjshaker]

The drawback with offset rockers is that it does place some lateral load on the rockers and lifters, but it's been done on FEs lots of times. You just have to keep it in mind and keep an eye on stuff. There's always a trade-off when doing something.

[thatdarncat]

Although we are used to the FE having pushrods running relatively straight up to the rocker arms, and it seems strange to us, there are other engine families that have pushrods that angle up to the rockers. This isn’t a totally new idea, just for FE’s. 

[jayb]

Am I noticing another issue.... the pushrods are blocking the manifold bolt holes!

Tom, that's correct based on that drawing, which is nearly 2 years old.  The problem has been corrected, so that the pushrod no longer blocks the bolt hole on that side of the water jacket passage.

Small block Mopars use an almost unbelievable angle between the lifter bore and the pushrod, if I recall correctly its something like 22 degrees.  So lifter wear is not a consideration.  Pushrod angle is also not a consideration as far as I can see, it will not detract from lift or duration of the cam, and the angle is less than some other engines (Chrysler Hemi comes to mind).  I really do think that the biggest single issue is the sideways force on the intake rocker.  As Doug mentioned, it is present in other FEs with offset intake rockers, but not to the same degree as on my design.  Again, testing will be important.  My backup plan if the spring steel washers don't work is a thrust bearing.  One way or another, I can make this valvetrain work...

[gdaddy01]

I believe in you Jay , keep up the good work .

[Dumpling]

Will the dedicated intakes for these heads be of the adapter/centersection design? Or a single piece intake?

IF (<<<<<big "if") I wanted to, could I do my own tunnelport version through the adapter's ports?  Doesn't seem like a major machining operation. IF I did that, how close would the rocker positions be to some "stock" configuration? ie, would a custom rockerarm setup still be required?

[jayb]

Will the dedicated intakes for these heads be of the adapter/centersection design? Or a single piece intake?

IF (<<<<<big "if") I wanted to, could I do my own tunnelport version through the adapter's ports?  Doesn't seem like a major machining operation. IF I did that, how close would the rocker positions be to some "stock" configuration? ie, would a custom rockerarm setup still be required?

It uses an intake adapter design, see the thread in the Vendor Classifieds for some pictures.

You could put a pushrod tube through the intake, but you'd be on your own for porting the intake adapter, installing the tubes, putting the holes in the heads for the rocker shaft studs, and any rocker shaft stands.  I'm sure it could be done, if that's what you really wanted.  BUT, in all cases the valvetrain has to oil through the pushrods, there are no provisions in the heads for oiling in the standard FE fashion.

[mtburger]

I am sure many of you have seen these previously, but in regard to crazy push rod angles, you are going to need to get way crazier than what Jay has going on here to even get close to the Mickey Thompson solution for his Hemi Headed FE back in the day.

[TomP]

It would look like if someone wanted to tunnel the pushrod through the port they could use another set of those exhaust rockers on the intake side and spacers between the rockers. Then drill a hole in Jay's intake and sleeve it and widen the port in that area.

Not sure it would be worth it if the only issue is rockers wearing the edges and thrust bearings stop that.

[Joe-JDC]

All this speculation will be debunked when Jay's engine makes over 1000 hp on pump gas.  Joe-JDC

[Cyclone03]

All this speculation will be debunked when Jay's engine makes over 1000 hp on pump gas.  Joe-JDC

Joe I’m all ready prepping my jaw for the coming holly @#$& jaw drop that is coming!

[jayb]

All this speculation will be debunked when Jay's engine makes over 1000 hp on pump gas.  Joe-JDC

That's pretty optimistic LOL!  I'd be happy with 900 HP for the unported, raised exhaust heads.  What I'm really interested in is the comparison between my ported Edelbrock heads, my CNC ported Blue Thunder heads, and my unported FE Power heads.  That will be an interesting and telling comparison...