Camshaft for a street hemi?

[Topcat]

It is the cam it has in it now... and its only making 8-10 hg wacuum ,

everyone says it wont last in a street driven car. The motor has only 3000 miles on it since rebuild, i dont want it destroyed, But wont go low on cam so its a 400 hp hemi....!

I want to swap to solid flat tappet like they had from the factory... bullit cams send me one they would recommend @ 050 duration 250 int 258 exh 
Lift 565/547
112 lobe separation
109 intake lobe center

Its a 4 speed 71 cuda with 3:55 rear gear

First Question:
What are the specs, P/N on your Cam if you know.
Anything more you can tell us on the engine  build?

To the best of my recollection: Anytime you go roller cam with roller rocker system on a 426 Hemi.
The block has to be notched so the the pushrod angles are re-adjusted to make up for the girdle height increase.

I was tempted to go roller rocker on mine.
But when I saw the costs for notching and parts; I bowed out and went solid EDM lifter Cam.
Johnson Lifters were what I used. They're great.  Actually a modified AMC lifter I recollect.

Hydraulic roller cam's could still be a viable option to consider.
On the other hand: Gen II Hemi's really react better with Solid Cams.


I don't know anyone running a roller Hydraulic Cam on a 426 Hemi to tell you any benefits or downfalls or differences.
Hydraulic roller lifter cams don't require the intermediate gear replacement like the solid lifter roller 426 Hemi's must do.

Solid Rollers run a Brass gear I recall. Yours only has 3,000 on it so I bet you've got a long way to be concerned. 
That has a maintenance replacement interval. I'm sure someone here can get that detail to you.

As for Intermediate gears for Solid lifter Hemi's; I would highly advise to stick with the Mopar Performance made units.

The Moroso unit I had initially, was self destructing grinding away and created a Ton of drama/breakdowns for me to find that out.

[Meyer]

It has the spirtsman EDM in it with this cam. Think the previous owner installed a melonized distributor gear

[Meyer]

This cam was a custom grind, the previous owner wanted a solid roller but with a lower lift, than most of them has...


My concern is really the solid edm roller lifters. As ive been told they wont last on the street.

[Topcat]

My concern is really the solid edm roller lifters. As ive been told they wont last on the street.

Whose your source and how did they get those facts?

[Meyer]

 Ray barton said it to me and on enginemasters they say it aswell

[Topcat]

This cam was a custom grind, the previous owner wanted a solid roller but with a lower lift, than most of them has...


My concern is really the solid edm roller lifters. As ive been told they wont last on the street.

I've never heard of a "Solid Roller EDM Lifter" before.

It's either a roller lifter or a EDM solid lifter as far as I know.

[Meyer]

Comp sportsman edm solid roller lifter ... is what it has in it

[Chryco Psycho]

Solid rollers / all rollers can starve for oil on the street where idling to much is a problem , if you have heard of the 3rd gen Hemi tick & cam failures this is the issue , , not enough oil getting to the rollers in the lifters most of the oiling for the roller lifters is splash fed up from  the crank   , EDM rollers should be better as oil is being fed down to the roller through the lifters .
I am sure not babying the engine will help as more oil will reach the cam & lifters .
As stated before People like Barton & FBO build more Hemis than I do & should have a better idea of what will work / last the best as I am sure they have seen the failures .
Rollers seem like the answer as the crap oil that is a available now is no good for flat tappet cams but rollers have their own issues .
The best solution is probably electric solinoid activated valves , the n you can map the duration for different RPM & no valve train is needed at all .

[Topcat]

EDM lifters likely do better with a high Pressure oil pump and not a high volume pump.
That would make common sense and what I have and was advised.

[floorit426]

I saw an interesting episode, of Engine Masters, last night. They dynoed an engine with hydraulic a roller lifter camshaft. They then swapped in solids, but kept the same cam, set at .000 valve lash. The engine made a little more torque and picked up 10 hp.

Their reason for doing this was that a solid roller lifter is prone to more failure, due to the more aggressive ramping of a solid profile cam, and the the valve lash causing the rollers to slow down and speed up. I would not experiment, on a hemi, but it seemed like a viable option. They were using a SBC, much better engine to experiment with, IMO.

[Meyer]

Exactly, thats what i say....


But still no one cam tell me
What to do...

[floorit426]

I'm going through the same decision making process. Me personally, I was over loud exhaust and a lumpy idle, right about the time I grew out of my chrome diff cover. I currently have a long duration, high lift cam, in mine.  It performed well, with 3" exhaust, but not with the recently installed stock exhaust system. I talked to Bob (Mr. Six Pack), the other day. He can provide a stock-type profile, that will outperform many, more ill mannered cams. I think I'm going to go with one of his solid lifter offerings.

Again, I want something a little more docile sounding and comfortable. Most would prefer something else.

[Chryco Psycho]

I tend to disagree , most would want something that makes great power but is drivable / livable unless you are racing !

[Meyer]

But no one can tell me wich cam to choose

[floorit426]

Okay, I reread these posts, and I don't see any that tell us what your goal is. If you want a good general purpose camshaft, that is pretty well mannered, then I can personally vouch for Topcat's selection. His car hauls ass, and is still pretty roadable (is that even a word?). Mike is running a very similar combination, too. Beyond that, you need to be more specific, with your needs.