Sweet

Has anyone tried this cam?
Part # LUN-60101LK
Product Line: Lunati Voodoo Cam and Lifter Kits
Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: 1,000-5,500
Duration at 050 inch Lift: 213 int./219 exh.
Valve Lift with Factory Rocker Arm Ratio: 0.454 int./0.468 exh. lift
Lobe Separation (degrees): 112
Intake Valve Lash: 0.000 in.
Exhaust Valve Lash: 0.000 in.

I'm putting in a 1970 350/300hp with 10.25 to 1 compression,3.08 posi rear

Scott Marzahl

I assume that this is actual known (measured compression) and not the advertised compression on a shift console. If it's advertised compression, the actual is at least .5 points lower, around 9.75:1

IMHO, I think you need a cam with some more duration at that SCR. The inlet valve closes relatively early at 56 degrees and you have a resultant DCR of 8.6:1. DCR isn't a magic number but provides a guideline and you should shoot for around 7.5 for iron heads if you plan on using pump gas.

I can only assume you picked a low duration cam because you might have an automatic transmission and do not want to change torque converters out. If you want to run high compression and want a highly dependable street cam, the stock L-82 cam is hard to beat. Yeah it has lazier ramp rates than a Voodoo but you won’t wipe out a lobe either. It has a late closing inlet valve (75.5 degrees), and you end up with a DCR of approx 7.45:1 With its 224/224 degrees of duration on a 114 ICL, it will idle great for a stock converter too.

Ratsirt

Scott what are your thoughts on the Part # LUN-60103LK?

Thanks

Sweet

I was using the advertised compression, It's a stock 1970 350/300 and I have a 4 speed with a 3.08 rear. I've been told to stay away from anything with larger duration because of my 3.08 rear. I have no experience in building a motor thats why I'm looking for advice. I want the car to be dependable and a good street performer.

63mako

I'm not Scott but...... Should work ok with the 4 speed.

Scott Marzahl

That seems to be a very popular grind on the car blogs, and with the right SCR and car configuration, it should perform well. I do not have any personal experience with it, however I am not a big fan of these "extreme" cams that try to emulate the ramp rates of a roller. I'd rather give up a few ponies for a more reliable valve train, at least in a street car that is driven fairly regular. If one wants faster ramp rates, go roller but at a much higher cost, its all tradeoffs, just my opinion.

ra.geiser

I use this cam (voodoo 60101)in my `69 350/300 with 4 speed and 3.08 rear end.
Together with edelbrock rpm 64cc heads weiand actio+plus manifold and holley 600dp.
I am very happy with tis set up,god torque or hill climbing!

63mako

Probably fine with aluminum heads. With Iron heads DCR is too high.

Sweet

I hope this is not a stupid question but what dose SCR and DCR stand for?

63mako

Here is the information you seek. Proper cam selection is the hardest and most important part of any engine build.
http://cochise.uia.net/pkelley2/DynamicCR.html