RB Cam Performing Right?

[PRHeads]

Any updates on this one?

 

[Road Grabber]

Well
Funny you should say that. I’ve done a lot of research watching builders such as a David Vizar, Darin Morgan, Brian Salter and more over the winter. Had a brief email conversation with Brian Salter that could result in a cam design. The flow of the head needs a 600 lift to get the overall hp potential which is what I wanted with brake vacuum.
I won’t see the engine builder or engine till at least late spring. I think coil bind caused huge issues with the engine. Enough where I don’t even trust the lifters anymore. Gaterman Lifters said it would take careful inspection to even make sure the lifter rollers weren’t damaged. Either way I am not using needle bearing roller lifters. Instead I plan to use bushed roller lifters.

As far as the cam I am really leaning towards the Trickflow top end kit cam which they say provides enough vacuum for brakes. This choice too because the heads were originally designed for that cam using the valve spring seat, height and coil bind settings which I plan to check anyways and confirm.

I am going to take a plunge as well putting solid roller lifters on the cam which has a more subtle profile with the hydraulic roller cam. I have looked into this quite a bit and it has been tested by many in fact Just Mopar Joe actually built an engine this way on purpose.

The valve springs now aren’t proper for a .530 cam. If I have to get another set to get all three specs right I might as well get a cam that gets me where I want to go using the valve springs on the heads now.

Call me crazy but I feel like I spoke to enough builders, one that has won many NASCAR races, and this design is a legitimate one.

If I can’t get a custom design cam I’m going to get the Trickflow cam and call it a day.

Jumping into these aluminum heads really exposed me to and totally different experience and knowledge base. A lot of lessons that if this works out I can share probably mid summer?

It better cause my car has been on stands years waiting to be driven.

Till then
Thanks for checking in.

 

[PRHeads]

Still going with?
6bbl
Ex manifolds
1.6 rockers

 

[Road Grabber]

Still going with?
6bbl
Ex manifolds
1.6 rockers

Good question cause if I do stay with the exhaust I would think I have to dyno and jet with the manifolds.
I can’t let go of the six pack. I am trying to see if there is a way to improve the six pack manifold. It is typical that a four barrel manifold produces more power but I love the six pack.
I will provide updates.
Thanks for checking in

 

[Dodge Bros]

I assume a trickflow top end cam kit is the same cam we are running in the video below? The TF cam is not an exhaust manifold cam, it needs headers. It for sure is a not great cam for power brakes in a 440.

This video is a 11.3SCR 91 octane pump gas 440 with stock E street heads and (Howard’s) trick flow 243/247 108 LSA cam with solid roller lifters (Comp endurex’s) and 1.6 rockers arms .640/.640 lift. The ICL is 106*, or -2 from how it is ground. The lash is set to zero cold. We drive it all over. We are shifting at 7000 now, video was 6700. It really goes after it hits 6000. TF240s would probably be shifting just over 7000, would be wicked for sure.

 

[Road Grabber]

I assume a trickflow top end cam kit is the same cam we are running in the video below? The TF cam is not an exhaust manifold cam, it needs headers.

This video is a 11.3SCR 91 octane pump gas 440 with stock E street heads and (Howard’s) trick flow 243/247 108 LSA cam with solid roller lifters (Comp endurex’s) and 1.6 rockers arms .640/.640 lift. The ICL is 106*, or -2 from how it is ground. The lash is set to zero cold. We drive it all over. We are shifting at 7000 now, video was 6700. It really goes after it hits 6000. TF240s would probably be shifting just over 7000, would be wicked for sure.

Just to confirm. That is a hydraulic roller with the solid roller lifters?

Yeah
I will compare the numbers. Sounds awesome.

Is that open headers on the track or exhaust pipes? What pipes and mufflers are you using? I’m sure that helps too

 

[Road Grabber]

Those cam numbers are @ .050?
Cause Trickflow ads have 296/300 duration

Interesting cause I called Trickflow and they claim that the cam is meant for street/strip and should produce enough vacuum for power brakes.

What is your manifold vacuum?

 

[Dodge Bros]

We’ve never had a vacuum guage on that engine. I doubt power brakes would work very well with a 440 on pump gas. If it was a bigger stroker it would likely work. For power brakes the LSA needs to be spread out wider with less overlap. We often do custom cams.

It has mechanical roller lifters. There is only one trick flow cam that I know of for a BB, and it is ground by Howard’s, 296/300 duration is at .006” tappet. 243/247 is at .050”

It has 1 7/8” Hooker header with a full 3” exhaust, X pipe with full tailpipes, long bodied dynomax turbo style mufflers. Ported weiand Team G single plane and a worked over 850 Holley. It was in full street trim.

 

[Road Grabber]

We’ve never had a vacuum guage on that engine. I doubt power brakes would work very well with a 440 on pump gas. If it was a bigger stroker it would likely work. For power brakes the LSA needs to be spread out wider with less overlap. We often do custom cams.

It has mechanical roller lifters. There is only one trick flow cam that I know of for a BB, and it is ground by Howard’s, 296/300 duration is at .006” tappet. 243/247 is at .050”

It has 1 7/8” Hooker header with a full 3” exhaust, X pipe with full tailpipes, long bodied dynomax turbo style mufflers. Ported weiand Team G single plane and a worked over 850 Holley. It was in full street trim.

My purple shaft 284/484 had a 108 LSA I believe. Produced 11 vacuum.

Wonder why Trickflow claimed it would create enough vacuum. Thru never hooked up a vacuum gauge either.

 

[1KoolBee]

Andy F did a bunch of tests that liked the wider LCA with manifolds. I believe if you ask Dwayne about pure stocks he will agree.
Doug

Agreed, I think Andy F. also found that the MP .520 solid cam was about the best out there with iron ex manifolds. Overlap is your enemy in that application and going bigger tends to work against you. Dwayne spec’ed me a cam with 113 LSA and about .550 lift for my manifold motor.

 

[Road Grabber]

Agreed, I think Andy F. also found that the MP .520 solid cam was about the best out there with iron ex manifolds. Overlap is your enemy in that application and going bigger tends to work against you. Dwayne spec’ed me a cam with 113 LSA and about .550 lift for my manifold motor.

Thanks for the advice