The new DART LS1 heads cleaned up even more than how they come from dart cast.

Lunati cause thats what the speed shop had that was really close to the specs I wanted so I went with it plus I got it for 280 brand new.

 

Those are some interesting lobes you chose.
Lunati 242* lobe compared to a XE-R, Comp lobe w/ 242* @ .05''

.006''-.050''-Lift
301*-242*-.595'' (Lunati)
291*-242*-.610'' (XE-R)

Dyno it, and see what happens. I'll be interested in the results.

 

I like the fact that it has a little bit more up top as far as duration goes for a little more top end. I actually called the speed shop to see if they could add a little more lift in but the cam had already been ground

 

It's a very slow lobe getting off the seat. I'd 'assume' the .200'' duration figures would be substantially less than the XE-Rs.
The XE-R 242 lobe has 163* of duration at .200''.

I like the idea of a lesser value at .006'' & .05'' and more duration at .200''. Usually this results in a higher lift but on the intake side... Your heads usually flow better here anyways. Get the valve to where it needs to be is how I look at it.

I'm looking at an intake lobe for my 5.3L and it specs to 216* of duration @ .05''. But, at .200'' it has as much duration as the TR220 lobe and .040'' more lift.

 

Why not? There are many cam companies in the US. I will never pay the $400 price tag most big companies want for an LSx cam. They are jacking the price up for LSx engines just because they can. You can get a custom ground billit solid roller Gen1 cam for $279 all day long. They can just kiss my ***. Most cam companies can grind anything you want. I personally use anything but Comp, just because how much they like their product.

 

Comps XE-R is a better power making lobe.

 

Show me some dynos back to back of the same spec cam and how much more it produces. Come on 3-4 hp maybe. Hell that is 10psi on my damn nitrous bottle being low. I can stand to give up 3-4 hp when Im going to be making 700+ to wheels and 850tq.

 

The Valve Events make the power, not the Brand of the lobes. Some people have their reasons for using certain companies lobes however.

 

Get on Tech. Search button is your friend!

Comp and Lunati focus more on top end horsepower. While Crane tends to focus on max TQ numbers. While both of these philosophies have their place in racing, Crane's focus on TQ tends to make for somewhat better street manners than a similar performing cam from Comp. Ling also has some very civilized cams, although I've never used any of their products. I've used two COmp cams in my truck, and I've ridden in buddies' cars/trucks that used other Cranes, Comps, Lingenfelters, Thunder, Lunatis etc. The Lunatis felt the lumpiest, and they weren't even the fastest on the specs. Crane and Comp are neck and neck at the drag strip from what I always saw. Cranes tend to be quicker off the line and Comps tend to be a tad quicker through the traps. As I mentioned, Crane's focus on maximum torque instead of max horsepower makes for a somewhat smoother idle and better street manners. Their cams never did make very impressive numbers what I saw them on the dyno. And I never see any cars or trucks that are running Lunatis.

 

I may come off as being a ***** but I could care less about 15 hp for an extra $150-200 in this situation. I would sacrifice for less just out of spite if I had to. Like Sport side said, you can make up your own cam with a custom grind. If you rely totally on Comps r&d and are willing to pay the extra price that is your decision.