[Steve C.]

My point was that the combination may not make its peak power at 5500 rpm. Not the ability to "rev it" to that or a higher rpm.

For information only:
Crower Part Number: 66056X3-16
Hydraulic Lifters CamSaver Pont & Olds V8

Regarding valve springs if it were me I'd look at PAC Racing or K-Motion for a suitable spring for adequate pressure with the Voodoo lobe.


.

[455rebel]

Originally Posted by pastry_chef

Dyno with a 703
http://forums.maxperformanceinc.com/...d.php?t=776169

That looks nice!
If I opted for the 704? Would the off idle tq, still be in the 400s?
Would I gain more than 20 HP @ or below 5500rpm?
It ant too late, I ant ordered it yet!
Also the 704 has lift over .500, would that add extra work to the heads and train?
I'm getting the impression the 704, in most opinion, is still a smallish cam?

Also I've emailed https://www.ionbond.com/about-ionbon...locations/usa/, for a quote on coating? I'll post results?

[67gtospud]

Originally Posted by 455rebel

That looks nice!
If I opted for the 704? Would the off idle tq, still be in the 400s?
Would I gain more than 20 HP @ or below 5500rpm?
It ant too late, I ant ordered it yet!
Also the 704 has lift over .500, would that add extra work to the heads and train?
I'm getting the impression the 704, in most opinion, is still a smallish cam?

Also I've emailed https://www.ionbond.com/about-ionbon...locations/usa/, for a quote on coating? I'll post results?

I cant say what your numbers will be vs the 703 but will say that when I was running the 704 cam in my otherwise stock 400 it pulled very hard off-idle and had excellent street mannors.

[pastry_chef]

Originally Posted by 67gtospud

when I was running the 704 cam in my otherwise stock 400 it pulled very hard off-idle

manual trans or auto with stock converter?

[67gtospud]

Originally Posted by pastry_chef

manual trans or auto with stock converter?

Manual trans

[HWYSTR455]

Honestly, I think it's a waste to coat/treat a HFT type valvetrain, the returns are so minimal it's not worth considering. The prior 'issues' which were experienced during the so-called 'oil' days has been debunked. For that money, you could go to a solid roller setup and pick up power. (Which you really wouldn't see in a coated app)

Manual trans' tend to be more forgiving when it comes to 'bigger' cams, I see where you're going with that P_C...


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[steve25]

If your rebuilding your heads from the ground up so to speak and want to step into the 21ist century in terms of valve train set up, then get Butlers F5066-8 Intake valve set and the Exh valve set F5063-8.

These valves are RA4 lenght valve and will allow you to use Comp Cams 26918 Beehive type springs and super light steel retainers!

No machinging will be needed to make this swap over happen, in fact you will only need to shim the spring a little to get its needed 1.80" installed height and 125 psi on the seat.

At 1.80" installed height these springs are good for .650" before coil bind.

Beehive springs do everything right!

[455rebel]

Originally Posted by steve25

If your rebuilding your heads from the ground up so to speak and want to step into the 21ist century in terms of valve train set up, then get Butlers F5066-8 Intake valve set and the Exh valve set F5063-8.

These valves are RA4 lenght valve and will allow you to use Comp Cams 26918 Beehive type springs and super light steel retainers!

No machinging will be needed to make this swap over happen, in fact you will only need to shim the spring a little to get its needed 1.80" installed height and 125 psi on the seat.

At 1.80" installed height these springs are good for .650" before coil bind.

Beehive springs do everything right!

Mostly curious bout the cost of coating .
I bought new Ferro (spelled wrong), valves when the 400 heads went on.
I've never used bee hive, but will consider once head is off and measured.
I have CC dual springs now, don't remember number the R hi lift J lifter claims to tame the cam a bit at low rpm?
And if the 704 pulled off idle in a 400, it ought to be even tamer in a 455!
I'm reconsidering the 704 now?

[pastry_chef]

Originally Posted by 455rebel

And if the 704 pulled off idle in a 400

I'm going to say everyone is different.. LOL
Members like Tom S will tell you he would hate a Voodoo 704 in a 400 engine with a stick. Yes, the 455 will be much more tolerant to a larger cam than the 400.

[steve25]

P.S, you will need longer push Rods .

[455rebel]

What about the hi lift J, R lifter, do they tick, and do they tame the lower rpm a bit?
And I have budgeted bout 1K, for the valve train, and 3 angle valve job, is this realistic?

[Formulajones]

Talk to Paul, he's dyno'd more voodoo cams and custom versions of them than anyone I know. He would be the guy that could steer you in the right direction and has the most experience with how they act and perform.

Since you're dealing with a 455 I wouldn't look at anything with less than 230 @ .050 so the 703 would be an absolute minimum, and probably too small for my taste. Lunati will also send these cams with a wider LSA if you wish.

[steve25]

You do not want a Chevy type 3 angle valve job on Pontiac D port iron heads unless your changing over to a Intake valve with a 45 degree seat which you should not do anyway for your type of motor build!

If your paying a shop for a 3 angle valve job it needs to be a 30 degree main seat taken out to .010" of the Intake valves OD.
This main seat should be .050" wide which should followed by a 45 degree angle .030" wide and what's left should be a 60 degree to mate up with the factory bowl cut.

[455rebel]

I'm almost convinced the 704 would be a better choice after studying all the post.
The 704s lift gets a tad over.500 , will that create additional head work?
I had a 3 angle done when I changed the 400 heads.
Took for granted the shop knew what to do?
Ive already port matched the heads. Is their any other minor work i can do myself?
And thanks to all for the help, for a guy with a non Pontiac car, you all have treated me like family!

[Formulajones]

I'm just speaking for myself based on my own experiences, but from what I can gather from reading, you're wanting a tame driver. With just a 3.15 gear and I assume no stall converter at all, I may not want a 704 cam in it.

703 should work with a setup like that without much tuning effort, and idle pretty smooth, provided the cam is installed at the right ICL.

To give you an idea, here is a custom voodoo cam on a 112 LSA, with 239/243 @ .050 in a 455. Quite a bit bigger than what you're looking at. It's installed on a 106.25 ICL. Keep in mind the voodoo cams prefer to be installed about 6 degrees advance based on Paul's dyno testing.

Once warmed up it idles with only a very slight lope and actually acts pretty tame in and out of gear and makes 12-13 inches of vacuum up here at 5,000 feet elevation. Engine made 507hp/571tq with ported iron heads, stock intake, stock exhaust manifolds etc... It actually peaked at 5500 rpm but carried that power to 5700 rpm, and made over 500 ft lbs. throughout the pull.

https://youtu.be/AOqwz3QlO5k

[455rebel]

Are you saying don't follow the cam card, advanced beyond card spec 6deg?
I was already thinking if I went with the 704 I might adv 2 deg, but 6 seems like a lot?

[Formulajones]

I don't know what your particular cam card says but according to Paul the voodoo lobe designs like to be about 2 degrees more advanced than what the cam card says.

For instance if it's on a 112 LSA and says 108 ICL, shoot for 106 ICL.

[455rebel]

I had my 702 straight up, it was way mild in a 455, but pulled hard of idle to 4800.
If I don't change my mind(again) I think I'll try the 704 (advanced 2deg).
With the hi lift J, R, lifters.

[Cardo]

6 degrees is what Paul recommended, and that's exactly where i installed my Voodoo 702. The results speak for themselves. https://forums.maxperformanceinc.com...d.php?t=836191

[455rebel]

Those are dang nice numbers for a small engine! I'll get in touch with Paul, and get some recommended specs.