devinfbody

iTrader: (4)

I'm getting the same feeling about them.

chevynation

iTrader: (8)

Damn these guys have a lot of lobes out for these motors: xe, xer, xfi, lsl, lsk, and now lsr.. How will I ever decide?

SS DNA

iTrader: (7)

Exactly, Makes it very hard to decide what you want and which ones work best for what you know.

Zero4488

iTrader: (10)

might have to try one of those cams out....

Jessica

Most people can't do that, hell most shops can't do that well!

DrkPhx

iTrader: (15)

According to Comp Cam these are all based on the LSL lobes which would account for the odd number duration specs.

I don't their think intention was to make the next killer set of lobes, but rather to simplify the cam selection process by creating a one-stop source consisting of popular custom grinds used by vendors here and on other boards.

on2

iTrader: (4)

A lot of doubters in here. We won't really know till someone tries them out.

Just cause Comp comes out with new lobes doesn't mean they are just trying to make money off something "new". This is probably an evolution of new cam designs from what they've learned and experienced and gained from feedback from vendors and customers.

As far as the new LSL lobes go, they could be the perfect compromise between LSK and the lower end. Again, we won't know till someone takes a good look at them.

People see high lift numbers and automatically think they are going to be harsh on the valvetrain. It all depends on how you set up your valvetrain. Can't go setting up a high lift cam like it's a low lift cam.

DRIVER456

Anybody know when those cams will be for sale or are they already?................Paul

03_SS_22

iTrader: (5)

do you know if this cam has any advance ground into it?
also power range?
54-459-11 231/239 .617/.624 113LSA

on2

iTrader: (4)

Ditto for this cam

54-460-11 235/243 .621/.624 113LSA

ringram

I think its also called LSR, basically all the older lobes suck according to Billy (the head cam designer) from comp. Well not his exact words, but he basically said that the newer lobe is more stable even with higher lift over some of the older lobes. So these would be the grinds to go with over any of the older comp lobe designs.

405HP_Z06

iTrader: (11)

The LSR cam series uses Xtreme Energy LSL lobes.

BRAAPZ

iTrader: (14)

Here is the actual catalog release for the new Comp Cams line up for the LSx. Please excuse the crudeness of the presentation of these pages. It was quick and easy.

For me, the most exciting part is Comps head-down-charging approach into taking advantage of the VVT option as used on the current LY6, L76, LFA and the 6.2L L92 engines.

Also heard a rumor that the Thumper series cams offer big peak torque figures at the expense of narrower power-band, which according to the rumors should also appeal to the autocross crowd, (more torque coming out of corners).

Courtesy of Comp Cams and my parts supplier.

PowerTalk

I wonder whether the remote mount turbo grinds only suit rear mount or front too?

69_YENKO

iTrader: (16)

can someone please verify if this cam will fit under stock heads & gaskets?

54-459-11 231/239 .617/.624 113LSA

A friend of mine was going to order it for his TA if it would fit under stock heads.

PATG spec'd me one in the high23X/mid24X range with around .620lift on LSL lobes that he said wont fit stock heads but im running TFS so i dont care.

this one has less duration, im not sure how that effects it, my first thought is that it wont clear but since its an off the shelf unit who knows.... just wanting someone smarter then me to chime in with a second opinion.
BTW, we called comp and the tech said "I cant be sure i didn't design the cam" so they R&D this stuff but dont know what it fits?

Chris Gage

iTrader: (18)

From what I was told by Comp, this is the biggest of the LSr series that will fit under a stock head, with a stock piston on the Gen3 motor. He also said "no matter what cam you get, always verify piston-2-valve clearence". I personally do not like this spec myself as far as the LS1 is concerned but then again, I am looking for a street set-up that makes great power from 1800-6800 and not having to spin the motor past 7k. This cam does however look appealing to those who are looking for more of a race set-up and have aftermarket heads that are flowing very well from .200-.500 on the intake and exhaust side.

The rep i spoke with did happen to throw out this comment (not word for word) "I like the 242/248 XE-r cam for max performance on a LS1 with a stock head".... I did not ask abou the performance potential differences between the 231/239 and the T-rex for obvious reasoning, there are just way to many factors. I believe these cams will do exceptionally well when matched to a good head/intake as far as power curves go. Also, these lobes appear to be a bit easier on the valvetrain as well....

chevrolade

iTrader: (21)

I should be getting my thumper cam in this week,lets see how it goes

valiant65

Interested on this also

2001$Tingray

The big difference in my opinion is the A. LSA. B. Duration and finally C. Lift. LSA of 110 or less is a race profile. Lots of THUMP and LSA of 112 and up is a modern engine computer controlled and it does not shake itsself apart. B. The duration is valve timing like how long it's open, when it's open, when and how fast it closes. And finally C. Lift. How much air can you get into a cylinder. It's all about how much air can you get in and out of an Engine in a complete cycle.
BTW, I'm running the Comp 54-459-11 in my LS1 with factory .052 GMPP head gaskets and no clearance issues. I did switch to Howards link bar lifters which have a different seat height so always do a PTV check with a adjustable push rod. You never know how much clearance till you check. Do at least one cylinder unless you rather work on it than drive it. Be safe....

G Atsma

Dude- chevynation hasn't been here for over 10 years, and this thread is over 15 years old. Nobody posted in it is even around anymore.
So- Who are you addressing here???