It might seem a little big but I'd look into the ls2 cheatr cam for A 6.0. I run that cam in my truck and makes power from idle to 6800rpm. I run mine to 6500 but never the less makes awsome torque I noticed a bigger difference from just changing my cam then I did from my 6.0 swap in the first place

 

u would definatly need a serious spring upgrade though

 

That is some hellacious lift, probably sound like an angry midget with a hammer under the hood. What is their reason for so much more exhaust duration? I assume it is because they spec the cam for stock exhaust manifolds, and the duration is to make up for their poor flow? Being I am running headers (although they have small primaries) I wouldn't think a cam with that much exhaust duration would do me any good. That and a ramp rate/lift like that would be a spring killer even with nice aftermarket springs, I am wanting the springs to last 100k w/o ever having to look at them again.

 

There is more to the story regarding the "not much more power above .550 lift" statements above. True, not much more air goes in at the highest lift points, but - those higher lift cams usually have more duration at .200, .300, .400, .500. That added duration in the mid lifts definitely makes a difference. If you peak a cam at .525 or .550, then its duration at .400 and .450 will likely be less than a comparable .600 lift cam. Also, with more aggressive lobes usually having less .006 duration, that makes for a better idle and mileage than a lower lift cam with the same .050 duration numbers.

I built a custom Comp cam a couple of years back for my supercharged Silverado SS. I looked at the GT2-3 cams valve events and used it as a template. I wanted the perfect idle and wide powerband, but also wanted more cam. I ended up with a crazy config of a ford lobe and SB chevy lobe ground onto the LS1 journal. The end result was something around 212/218 .591 .589 115 +0 (used 918 springs). It idled perfectly. Gas mileage went up. And it had a wide powerband. After demodding my truck, you'd never know it was cammed by the sound. It ran great with the stock converter then too.

 

it does have a bit of noise but not anything crazy. And I run long tube headers with no cats and true duels with an x pipe it works good with that setup re says it's made for stock exhaust but will perform better with headers call up tr and talk to the guys there they do custom cams to so I'm sure they will be able to help u.

 

That is a very good point, one that I had not thought of when I said that there is very power/flow to be gained above 0.550" lift. In keeping with your point, I went back and looked at Comp's lobe catalog. For the Xtreme RPM and Xtreme RPM High Lift there is ~4-5* of duration to be gained @0.200" of lift, all without changing the .050" or .006" duration numbers. Looks like I just keep learning every day. Thank you.

Comp Lobe Catalog

 

My engine has alot of valvetrain noise, always has even when it was stock. It got worse after the cam swap though. I swapped out the Comp 915's I had for LS6 springs and it didn't change a thing. I was going to try longer pushrods but never got around to it...

 

Not a problem.

For a good comparison, look at the duration numbers for a 220* cam in XE, XE-high lift, and XER. The 3720 (220 XER) has the same .006 as a 216 XE cam (3766 lobe) making it act like a smaller cam at idle, but has a much larger .200 duration which compares to a 226 XEHL (3716 lobe) for more power.

 

This thread has been really informative!
I have been slowly looking for a very similar cam with similar wants to 1998chevy1500.
Just thought i would throw that out there. now i'll sit back and soak up some more cam knowledge!

 

It wasn't listed on the list of cams you were looking at, but have you thought about this cam?:

Lunati Voodoo Cam

212/218 -.531/.531-113+4

I think this is the perfect cam for what you want. These "voodoo" cams have a neat design on their lobes and in a dyno book on LS1-LS7s I have, it made more power under the curve than the Comp265.