That cam is going to have a good amount of overlap, which bleeds off pressure in lower rpm’s. I’d have to go back to the calculator to check but it’s like +7-11 overlap which isn’t great for a truck but if you have a 3500+ stall it’d do ok.

Even a cam that has -1 overlap still chops like hell and doesn’t bleed off as much pressure.

 

I had the Cam Motion "little chopper" which has a little less duration, same lift but on a tighter 108* degree LSA than the "Hotrod" camshaft you posted. It was a torque'y SOB in my 6.0 and I liked it. Had a nice lope at idle and closes the intake valve early building a nice dynamic compression.

The chopper replaced the Sloppy Stage 2 and to be honest the little bit of bottom end torque it picked up while sacrificing a little more upper RPM power wasn't worth the money and time. Swapping to higher compression heads... I had to swap out the chopper for a cam with less dynamic compression (later intake valve closing).

Unless you're doing a big swing in numbers two similar camshafts are going to perform about the same -Richard Holdener.

To add to Richard's dyno testing... I did three cam swaps and each one ran and idled perfect on the same tune. I did a few small tweaks but not a big swing anywhere in the tune file. On top of all that they all sounded about the same at idle and WOT. The chopper petered out around 6200, SS2 around 6800 and the TSP Torquer v4 around 7000 RPM.

228/230 .585" .585" 112*
222/232 .595" .587" 108*
231/234 .629" .615" 111*

Sloppy Stage 2


Cam Motion "Little Chopper"


Texas Speed TSP Torquer v4

 

Thanks RedXray. I have been slightly worried about my SCR which I calculated to a tad above 10.5:1. I think I’ll go with your suggestion on the SS2, though the little chopper looks interesting. Probably wouldn’t tell much difference in a stock 6.0. With the headers, stall and gears should be a fun ride. Upgrading my injectors also, so should be good to go there. Have you heard if unshrouding the valves in the 706 heads make any noticeable difference. With the smaller valve, I know that I will be at the mercy of airflow, so a super large cam would probably make things worse.

 

I'm at 11.4 static with no pinging on 93 octane with 27* total timing advance. IIRC the minimum CR with the SS2 is 10.5 so you're good. When I had the 317 heads on my LQ9 I was at the OEM 10.2 static CR and the SS2 did well. Can't help with info on the 706 heads but they are better than the large chambered 317's with their CR boost. I've read of some machinists cutting for the larger lightweight sodium valves that helps with flow but I have no firsthand knowledge.

Here is a quick hit with the SS2 and 317's. You can see the cam come in at 1600 and twist to 6500 pretty quick before the shift. By the way the speedo jumped... the back tires probably spun a bit. At the time It had 3.42's and a 3200 stall.

 

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