[Tim Corcoran]

Lunati Voodoo Hyd Roller
Specs are 282/290 Adv.
231/239 @.050 LSA 110
.530/.550 lift @ 1.5

Is anyone running this cam? I was wondering what the idle is like in a 400 or 455
Thanks

[Formulajones]

In a 455 it's very smooth when setup properly with maybe a hint of cam. Paul C has dynod that cam more than anyone. Contacting him at koerner racing would give you all the details you'd ever need about it.

[Tim Corcoran]

My combo is a 67 LeMans, 400 with a 4" stroke bored to 442ci, I think it's 4.189 bore, ported 6X heads flow 265 cfm @28 on the intake, 9:1 comp, ps, pb, ac, RA/HO exhaust manifolds, TH-400, 3.08 gears mild converter stalls about 2200. I am currently running the Voodoo hyd roller 219/227 custom ground on a 114 LSA. It idles very stable at 850 RPM and 800 in gear and pulls the 3.08's very nice. I love everything about this combo but I know it would make more power with more duration but don't want to sacrifice idle quality, street manners and don't want to mover the power band up too much for the 3.08 gears. If Paul doesn't chime in on this I will send him an email and get his take on it.

[Steve C.]

Sort of related, see post number 28 here:

https://forums.maxperformanceinc.com...=Voodoo&page=2


.

[Stan Weiss]

Originally Posted by Tim Corcoran

My combo is a 67 LeMans, 400 with a 4" stroke bored to 442ci, I think it's 4.189 bore, ported 6X heads flow 265 cfm @28 on the intake, 9:1 comp, ps, pb, ac, RA/HO exhaust manifolds, TH-400, 3.08 gears mild converter stalls about 2200. I am currently running the Voodoo hyd roller 219/227 custom ground on a 114 LSA. It idles very stable at 850 RPM and 800 in gear and pulls the 3.08's very nice. I love everything about this combo but I know it would make more power with more duration but don't want to sacrifice idle quality, street manners and don't want to mover the power band up too much for the 3.08 gears. If Paul doesn't chime in on this I will send him an email and get his take on it.

What are you seeing for idle vacuum? The Voodoo;s asymmetry makes calculates a little hard, but my rough calculation is 16.7".

Stan

[Steve C.]

Tim,
Paul no longer posts on PY.
Larry has contact information.

Side topic: Also I suspect you have followed Paul Carter's positive comments here regarding the topic of a 110 lobe separation. If not, you might discuss the subject with him.

Before anyone jumps on the anti 110 LSA band wagon, as a reminder he posted valuable information regarding a Voodoo cam with a 110 lobe separation
with very specific information presented on that subject as to why they are much different than other cams, such as the Comp XE lobes.


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[Jay S]

If drivability is one of your primary concerns you could do better than that particular Voodoo cam for how your car is set up. I helped someone with nearly the identical combo, trying to tune it for better street manors. Tons of power, but a pretty rough idle and not great vacuum. IRC…about 12”. To get that cam to idle smooth at 850RPM with 9:1 compression I think it takes either headers and an X pipe, or more compression, all three is best. With the RA manifolds, combined with the 9:1 compression and the 4” stroke the rougher low idle will be pretty noticeable. Stall speed is low on your converter also, it has a lot of mid range power, the 3.08 gears would be fine, but it will not be very speedy up against the converter at first.

[max 93]

I am running that cam in my 400. It’s a fairly rough idle.

[Tim Corcoran]

Originally Posted by Stan Weiss

What are you seeing for idle vacuum? The Voodoo;s asymmetry makes calculates a little hard, but my rough calculation is 16.7".

Stan

Stan
I actually don't remember but I don't think it was that high. My memory is not quite as good as it used to be

[Tim Corcoran]

I am so happy with the way the car runs now I think I will stick with the current cam and put 150 shot in it and call it good. I think the current cam should be pretty N20 friendly. Cranking compression of 145 (cold) the N20 should work fine.

[GOAT8U2]

I have this cam, idled great at 850rpm and makes from 11-12.5" vacuum. I think it's great for us Street guys since the torque curve is huge until 5500rpm.

[Tim Corcoran]

Originally Posted by GOAT8U2

I have this cam, idled great at 850rpm and makes from 11-12.5" vacuum. I think it's great for us Street guys since the torque curve is huge until 5500rpm.

Thanks for responding, would you tell me the cubic inches of the motor, the compression and if you have headers or RA/HO exhaust manifolds and the converter? Thanks

[Cliff R]

You pretty much answered your own questions here.

For every 10 degrees added duration you will need a FULL POINT of compressoin ratio increase to keep idle vacuum, power off idle, and street manners about the same with a cam swap, and that's assuming you aren't going with tighter LSA and adding even more overlap.

Considering right now you have a small cam in it on a 114LSA and are only seeing 145lbs cranking pressure a larger cam on a tighter LSA just isn't in the cards here.....IMHO.......

[Stan Weiss]

Originally Posted by Tim Corcoran

Stan
I actually don't remember but I don't think it was that high. My memory is not quite as good as it used to be

Tim,
Thanks. Yes, if I adjust what I get for the new cam to what people have posted then I would get less for this cam. With you present cam you are seeing 145 psi from a cranking compression test. What is your ICL set at?

Stan

[GOAT8U2]

In my signature are my specs, 462ci, 11.7:1, 10" PTC etc.
I have a thread on the Race section from my engine dyno.

[Tim Corcoran]

I bought a set of bare C&C'd 78cc SM heads on the black Friday special. I think I will run my current cam for now and enjoy it as but will add some n20. Down the road I will install the SM heads, headers and the 231/239 Voodoo. The SM heads will bump my compression up to a little above 11:1

[Tim Corcoran]

Originally Posted by Stan Weiss

Tim,
Thanks. Yes, if I adjust what I get for the new cam to what people have posted then I would get less for this cam. With you present cam you are seeing 145 psi from a cranking compression test. What is your ICL set at?

Stan

I think I might have a record of that but I am currently in France on business so I can't go out and check my vacuum or look up the where I put the ICL. The number 109 seems to stick in my head but I could be wrong.

[HWYSTR455]

Are the ring gaps good for a 150 shot?

.

[Tim Corcoran]

Originally Posted by HWYSTR455

Are the ring gaps good for a 150 shot?

.

I have Ross/Butler pistons and David told me that you can safely go up to a 150 shot with these pistons. Since a 150 shot is rather on the small side I gapped the top ring .002 larger than the naturally aspirated recommended gap. This was half way in between the recommended naturally aspirated gap and the N20 gap recommendation.

[HWYSTR455]

It should be safe, but going to the recommended gap for N2O has no drawback and would still be cautious with any less.

Pistons I figured would be fine, wasn't particularly concerned with that.

Just checking...

.