What springs come on eddy performer RPM heads

[nm9stheham]

Use the mr. G .028 gasket. Nothing wrong with that crane cam. That thing is bad *** in low comp 360s. Doesn't look like it on paper but it flat works. BTDT

FWIW.. with a handful of reports here on the 1121G's sometimes not sealing up as well, I'd be checking the heads and decks for flatness if contemplating them. Probably need each surface to be something in the order of +/-.002" all across to be sure of a good seal. I have used those types of composition gaskets several times on rally engines with no issue, but I've always taken care on flatness of heads and decks. The one composition gasket like that which blew on a turbo rally engine had the head a bit warped when disassembled.

 

[Wyrmrider]

nm
I was quoting Brookshire who said he used the same formula for the Chevy and Dodge voodoos posted above
From what I understood they were evolved from the Comp xt lobes
I do not know that he did any .904 hyd lobes while running Ultradyne
and IDK if Howard's endended up with any hyd profiles out of the several hundred of the latest they aquired
one thing to take away from that previous post is that you have to be very very carefull buying from E-Bay (or anywhere really) we each have to be responsible to get what we think we are getting

 

[Wyrmrider]

remember comp and howard and Lunati advertised is at .006 and crane is .004

I would not go roller tip rockers- add the b3 kit and you loose the bang for the buck factor
now magnum heads and 1.7 is a better value

 

[nm9stheham]

remember comp and howard and Lunati advertised is at .006 and crane is .004

Ah yes, thanks for that. I keep thinking Crane went from .005" back-in-the-day to .006" nowadays, but it's the opposite. Measuring advertised at .004" vs .006" would make that difference between .050 and advertised durations something like 8* larger. Nice to understand that the Cranes are not as slow on the ramps as I thought!

I sure wish we could get other lift/duration data from the mfr's. Howard's told me that I could.... I just have to buy the cam and measure it LOL

Maybe we need to start some sort of 'actual measured cam data-bank'....

 

[scott657]

Okay, its going to be a set of stock bolt on rockers for now unless I can find a 1.6 rocker that doesn't need a correction kit etc. at least for now.
Im not in a big rush, so I am accumulating budget parts. Retiring in one year and this will be my project. Most of you seem to like the Lunati 250 or 256, for this combination. I realize I wont be using the heads to their fullest potential at this time.

 

[scott657]

Still waiting on Lunati, which I like Here are comp cams suggestions
All single pattern

 

[scott657]

Id probably be wasting the potential on the edelbrocks

 

[Wyrmrider]

from the archives
UD Harold wrote
We did dyno-test all hydraulic VooDoos against their equivalent Xtreme Energy counterparts.

At 2500, where the tests were started, all VooDoos made more torque than the Xtreme Energy cams.
One would think that more bottom-end torque meant a shorter duration, WHERE IT COUNTS!!!!."

Dacaman responds

Having said that, a voodoo 268 has been proven to perform better than an XE 268, bottom, middle, and top.

All voodoo cams had to meat this specific requirement before being released.
This is why they took so long to release the voodoo solids

Though the nod does go to the voodoo for me at least, the ones I have used seem to just have more low rpm.
One of the major reasons I choose the voodoo over the xe isnt power related at all for street use and its the noise. Harold has done a fantastic job putting the valve down gently and those lobes make for a quiet valvetrain and that is a real luxury on street driven stuff that sees many mile"

Wyrm's comments
Harold said he was going to retire in 2020, he had some new ideas that never got made,
he thought his "post Voodoo" designs were even better
"4 degrees shorter with a little more at 200 and more lift"
HOward may have them but IDK if solid or roller or what
The dialog above is refering to Chevy cams- The Mopar voodoos trump the Chevy voodoos

 

[Garrett Ellison]

Id probably be wasting the potential on the edelbrocks

The real waste of potential with the elebrocks is not going ahead and putting them on an engine that will yield at least 9.5:1 compression with them installed. Of course, a properly selected cam will make or break a low compression combination. But a set of zero deck flat tops with no valve reliefs and some thick cometic gaskets for piston to valve clearance would just be better all the way around. And regardless of what you do, I highly recommend the B-3 racing engines rocker correction too. You email them and they will give you directions on how to measure your rocker gear and they will make a set shaft spacers that correct your geometry. It may appear to be overkill for your build, but it's money well spent.

 

[furrystump]

I can add just two things be careful of the stock eddy valve springs. They can struggle at the stated max lift with any kind of aggressive ramp and you really can’t go wrong with PRH’s advice.

 

[scott657]

Just a question from someone who is new to this
Why do 2 similar camshafts such as the comp xe268 and Lunati 701 require such different valve spring configurations

 

[Wyrmrider]

What Garrett said
However the new heads (not race heads or manifold)will help any CR build- cam to match
better than rebuilding old LA heads except the roller cam block ones

 

[Wyrmrider]

Scott
The Edelbrocks will help your build no mater the compression or cam
Only other way is the EQ' or reworked late model LA Roller Cam Block heads
the so called "high swirl' ones with the better chamber
Magnum heads also work
good decision on the rockers- use your budget on something else
if you see any iron rockers at bargain prices grab them

 

[PRH]

One thing to keep in mind, my recommendation is based on wanting to use the springs that come on the Ede heads, and stock stamped rockers with no adjustment.

It doesn’t usually take too long for a rate cam to start putting pushrods through Stock rockers with 100k on them.
Especially if you start cranking up the spring load.

As with just about every other aspect of engine building....... you have to give something up to get something back.
With a fast rate hyd cam what you give up is some degree of reliability when using OE rocker gear.

If you’re willing to change out the springs and run some sort upgraded adjustable rocker gear...... then the door is wide open.