Has anyone ever tried the 20120711 lunati voodoo hyd. roller in a sbc build? its a 219/227 duration @ .050 with a 112 LSA and a 106 ICL. I built a 385 using it earlier this summer and I'm disappointed so far. Running 183 cc Pro-Maxx Maxx series aluminum heads, Wiseco D-Dish pistons (9.4 static compression) running cam 4 degrees advanced. I just don't feel the torque that I had with a comp 218/224 flat tappet and crappy GM 882 iron heads. The motor never really has a punch to it. It acts like its lazy on timing but I have 34 degrees in it all in. It is the thunderbolt IV 22A module which is a lazy curve not all in till 4500 rpm. I can tell the engine would benefit from more timing around 3000-4000 rpm. If anyone has tried this cam, how did you set it up?

112LSA installed at 106ICL is 6* advanced. Just fixing your math.

Be interesting to see the duration differences at .100" lift and .200" lift between the two cams to see if anything there.

Going from flat tappet to roller and more overall lift the ramp rates have to be higher on the voodoo. SB, I have it advanced 4 degrees additional with my timing set. Actually only 2.5 degrees due to machining errors. So in reality its at a 103.5 ICL. I was trying to bring down the power curve further, but I am wondering with the 6 degree built in if I went to far? Comps XM270HR is a similar grind but with a 110 ICL and slightly less lift. I havent put a small enough prop on it to see where it really dies off, but I've had it up to 5300 rpm and doesn't feel like there's much left.

If you have it (your 112* lsa cam)set at 103.5ICL it's in 8.5* advanced. That's a lot !

For comparitive sakes, in a boat a 218/224 Comp Cams HR on a 112lsa installed at 108ICL (that's 4*advanced) in a 383 usually maxes around 5200 or so rpm. 5400 or so rpm in a 350.

The cam was advertised at 5800 rpm upper end so I figured with the additional cubic inches probably 5500 and then knock off another 200 by advancing an additional 4 degrees. So by that it seems to run to where it should right now. It just doesn't feel as strong as its built. Vacuum is good across the range so I feel I have good valve control. Im thinking about going back to straight up with the lag in my timing would put me about 107.5 and maybe drop 1 prop size and try it.

You have to be very careful setting up that type of lobe. Look on the back of the cam card and it explains how to correctly find the center of the intake lobe. I believe most builders into that type of lobe (Harold Brookshire's), will insist upon an infinitely adjustable timing set to properly degree in the cam. When set up right, that cam should pull really hard for its size and have better idle/vacuum when compared to a symmetrical lobe cam of the same duration. Again, with that style of lobe, you need to correctly find the center of the intake lobe, if you just match up the timing marks, if it ran, it would not run very well. I learned this the hard way on an Ultradyne cam years ago and the Voodoo lobes are just evolved versions of that with the setup being even more critical.

I would add don't underestimate the importance of ignition advance between 2200 and 3200 rpm. Just a few degrees of ignition can make a significant difference between a lazy feeling engine and a torquey one.

Going from the 110 to 112 lsa will kill some bottom and mid range torque, how do the flow numbers compare between the heads

I would think widening lobe sep would help bottom end at the expense of top end.

No, typically the opposite. But of course, it's not the only spec, if you will, that effects rpm range of power.

I've used more 104-106LSA cams on small blocks than I can remember. Not on boats though, obviously.