Thoughts on these cam specs for LS3?

[HellHound]

I'm fairly new here and don't post often, I'm more of a reader and just take the information in.

Anyways for the most part I'm pretty dead set on my cam selection and already have the Cloyes LS2 (3 bolt) timing set up.

Lunati has a few Voodoo grinds that I am interested in, the only catch is the grind that intreges me the most is a LS1/LS2/LS6 cam (3 bolt)

Lunati Voodoo #60512

Hydraulic roller. Serious street/strip cam. Requires computer modifications. Needs upgraded intake manifold, exhaust maximize performance.

• Advertised Duration (Int/Exh): 282/288
• Duration @ .050 (Int/Exh): 232/238
• Gross Valve Lift (Int/Exh): .599"/.601"
• LSA/ICL: 113/109
• Valve Lash (Int/Exh): Hyd/Hyd
• RPM Range: 2400-7000

9* of overlap

My brother has had excellent results out of these grinds in his GTO and carried a great torque curve, although it is cathedral port.

I'm not posting this to get bashed on my possible selection, just looking for some useful info and to see if anyone else has had experience with a LS1 cam in with the L92 setup.

Lunati states the difference from a LS1 grind to a LS3 is no different other than the specs itself, to benefit the exhaust with the larger rectangular intake port.

To be honest I think the large duration splits are a somewhat overrated from speaking with Lunati/Comp techs and seeing some Pat G testing. The 6 degree split this cam offers should be sufficient enough. Similar to the TSP 231/236 that I have seen success with on here. RPM range seems to be right in the ball park, and the lift is what I want for street use. I understand these Voodoo cams have a asymmetrical lobe, which has a fast aggressive opening ramp rate and softer on the closing side to be easier on the valve train.

Obviously I will be using the correct supporting mods, valve-train, 1 7/8 LT's, FAST 102, Ported TB, etc.


Thanks in advance.

[Rhino79]

This cam should be a solid performer, I would say its capable of 460s rwhp on a ls3. The lower lift will leave a little power on the table, but the cam should have a good flat tq curve and good average power in general. It won't be a real peaky cam, but it will be a great daily cam.

[HellHound]

Appreciate the response. That's what I'm going for to be honest. A strong street cam that makes good bottom end with a broad power band maybe the 102 will get me a couple ponys up top.

How much does the LSA and ICL play into the L92 game?

[litle88]

But just edit your post to 9* of overlap bud.

[litle88]

I doubt the FAST will yield any at this level bud. Ls3 is up for the task.

[HellHound]

Originally Posted by litle88

But just edit your post to 9* of overlap bud.

I'm sorry I must be determining a different number.

I see now. I used the advertised number.

Ex Closes- 2 ATDC + Intake Opens- 7 BTDC= 9*

[litle88]

Originally Posted by HellHound

I'm sorry I must be determining a different number.

I see now. I used the advertised number.

Ex Closes- 2 ATDC + Intake Opens- 7 BTDC= 9*

Lol gotcha no biggie.

[Alvin@PCMofNC]

If it was me I would go into the mid 240's on the exhaust with that much intake duration alone. If not pull the intake lobe into the low 220's. There isn't enough split there to really take advantage of what could be there.

[KCS]

Originally Posted by Alvin@PCMofNC

If it was me I would go into the mid 240's on the exhaust with that much intake duration alone. If not pull the intake lobe into the low 220's. There isn't enough split there to really take advantage of what could be there.

I couldn't agree more. We use relatively small intake lobes and pretty normal exhaust lobes on the rectangle port heads compared to something we would spec out for a cathedral port head. Some of our blower grinds have as much as a 20 degree split between the intake and exhaust...

[CGT]

I think that cam will be just fine, using exhaust flowbench cfm as a basis for choosing exhaust duration or a difference or "split" can lead you down the wrong path. That being said, the larger "splits" can work well, just not for the reasons people think they do. It has alot more to do with Exhaust valve opening and overlap positioning than "flow differences".

[Rhino79]

Originally Posted by litle88

But just edit your post to 9* of overlap bud.

Is the industry standard now overlap at .050, because I always went off advertised numbers for overlap...lol. Maybe Im old scool

My new cam is around 27* of overlap. But at advertised specs its 72*....lol.

[JANNETTYRACING]

Originally Posted by HellHound

I'm fairly new here and don't post often, I'm more of a reader and just take the information in.

Anyways for the most part I'm pretty dead set on my cam selection and already have the Cloyes LS2 (3 bolt) timing set up.

Lunati has a few Voodoo grinds that I am interested in, the only catch is the grind that intreges me the most is a LS1/LS2/LS6 cam (3 bolt)

Lunati Voodoo #60512

Hydraulic roller. Serious street/strip cam. Requires computer modifications. Needs upgraded intake manifold, exhaust maximize performance.

• Advertised Duration (Int/Exh): 282/288
• Duration @ .050 (Int/Exh): 232/238
• Gross Valve Lift (Int/Exh): .599"/.601"
• LSA/ICL: 113/109
• Valve Lash (Int/Exh): Hyd/Hyd
• RPM Range: 2400-7000

9* of overlap

My brother has had excellent results out of these grinds in his GTO and carried a great torque curve, although it is cathedral port.

I'm not posting this to get bashed on my possible selection, just looking for some useful info and to see if anyone else has had experience with a LS1 cam in with the L92 setup. I'm sure my PTV would be fine as well?

Lunati states the difference from a LS1 grind to a LS3 is no different other than the specs itself, to benefit the exhaust with the larger rectangular intake port.

To be honest I think the large duration splits are a somewhat overrated from speaking with Lunati/Comp techs, and the 6 degree split this cam offers should be sufficient enough. Similar to the TSP 231/236 that I have seen success with on here. RPM range seems to be right in the ball park, and the lift is what I want for street use. I understand these Voodoo cams have a asymmetrical lobe, which has a fast aggressive opening ramp rate and softer on the closing side to be easier on the valve train.

Obviously I will be using the correct supporting mods, valve-train, 1 7/8 LT's, FAST 102, Ported TB, etc.


Thanks in advance.

This is What we call a Carry over Cam, There was a Lot of money allocated for developing Cams for the LS1 when it hit the streets.

R&D Cost money that must be spread out over many cam sales in the Thousands before it is paid for.

Even the description is a dead ringer for the LS1, They Benefited most from Intake manifold upgrades.

Where the LS3 intake is So Good It doesn't.

Will it work Yes, Is it Optimal for an LS3/L99 NO

We did all of our R&D on the LS3/L99 for our Cam Lobe Profile selections, and Lobe separations.

We studied the Head First to come up with a baseline then proceeded to test our Theories, We had our Failures and our Success which lead to our Cam Shaft offerings in Rough Idle and Smooth Idle.

[litle88]

Originally Posted by Rhino79

Is the industry standard now overlap at .050, because I always went off advertised numbers for overlap...lol. Maybe Im old scool

My new cam is around 27* of overlap. But at advertised specs its 72*....lol.

You had me at 27* rhino! Lol I love it already.

[HellHound]

Thanks for some educated responses guys. All this info factors into my decision. obviously the LS1 to LS3 specs are going to differ as far as duration, lift etc. I was always curious of if, the manufacturer made adjustments in the grind itself, maybe even changing the ramp acceleration in certain areas....or allowing possibly a higher max lift area in general.....

I have always been impressed in the results from the 231/236 that TSP offers, just not fan of the high lift for street use and long commutes, over a period of time and working the valve-train so much. Maybe I'm just trying to find a cam in the brand I am partial to, to mimic the TSP cam, although obviously sacrificing some lift.