briancb1

Does anyone here have any experience with the Comp LSR Rectangle Port cams? There are 3 that seem to fit my catagory of "hot street, limited strip" car". I want to be able to hold my own, but not to the point where its kicking and suring bad / being annoying when I'm in the parking lot and similar situations.

As with many, with all the voices and choices its hard to finalize the combo. How do they measure up again the popular XE-R Lobes?

I was looking at these three cams for my car:

Comp LSr Rectangle Cams

269LRR HR13 ADV 269/285* @.050"219/235* .607 .621 113° 1500-6700RPM

277LRR HR13 ADV 277/293* @.050"227/243* .614 .624 113° 1900-7000RPM

281LRR HR13 ADV 281/297* @.050"231/247* .617 .624 113° 2000-7000RPM


This is all for a 2006 GTO 6.0 M6. Cam will go in along with TEA stg1 CNCed LS3 heads, LS3 manifold/LS3 injectors, 1 7/8" LT headers, CAI inc intake, 160* thermostate yada yada....

Thanks guys, I appreciate your opinions

STAR

iTrader: (1)

LS3 heads are very sensitive to cam timing and don't like a lot of overlap. A cam that has shown to work really well with those heads is a 231/235 from comp cams on lsl lobes. You could order it directly from comp or I'm sure one of the vendors to the right---> could help you out.

281/285* @.050" 231/235* .617 .624 114+2

Ask for lobe# 13018 and 13019 on a 114+2

Htownss

I have some experience with all three cams, I have the 269LRR, I was a little apprehensive with the somewhat lower specs based off all the other cams that it would not perform well, boy was I wrong. Small cams have sweet torque curves, this cam is a great street cam drives great at low speeds, has a nice choppy idle, starts torque hard at 2700rpm to 5800rpm makes power to 6500, I have it in a 2010 Camaro with 3.45 gears and at 35-40 mph I can nail it with no clutch action and she breaks the tires loose like crazy, "with 20in wheels, on concrete road", it made 453hp and 447tque.


One of my buddys has the 277Lrr, it made 470ish hp with 430ish torque starting at 4000 to 7000, it had some low speed drivabilty issues as well as in six gear.

My other buddy has the 281Lrr it makes about the same power but has bad drivabilty at low speeds, "I beleave he said under 2000rpm" however its not tuned correctly, I beleave drivabilty and perfromance could improve, it really shines at the track, we were at the track last week and it ran a best of 12.27


It really all depends on how your going to use the car, if you want great torque in the rpm range that you spend most of you time in "on the street" you won't regreat the 269Lrr

If your going to spend a lot of time at the track and in the higher rpm range the other two will work great.

Good luck, hope this helps it was the toughest choice I had to make.

Regards Htown

LS6

Great cam's

the TEA CNC Stg 1 is flowing exremely well especially the exhust side

you should proper select the cam with above mensioned

Please see the attachment

ringram

Ive got the 2nd in your list. Very flat tq in a 440...
Over 500ftlb from start of pull through to redline with a peak over 600ftlb
BHP doesnt drop off it pulls right to redline (6500).. well a very slight decline.
That was running 0.60bsfc (ie) Ultra Rich, so I think there is another 5% in there with a decent tune.
Oh thats also with WCCH CNC LS7 heads..

SweetS10V8

iTrader: (4)

Im running the first one (219/235) and have nothing but good things to say about it. It has great driveability and pulls like a freight train!!!

briancb1

Perfect, I will choose the 269 cam it seems to fit my description the best.

thanks guys!

ringram

Yeah the middle one has 18* overlap at 0.050 so low speed traffic jams at near zero throttle is a bit horrid even in a 440. Im slowly reducing it, but the 219/235 sounds the go in a 6L.

70Novaproject

I just spoke with a comp rep on the phone. He said the 269 was a great street cam. It has power in all the right places if you want to drive the car around town and terrorize the place. After spending a great deal of time giving him all my specs, that's what he came up with. Ill be buying one as well.

WKMCD

iTrader: (2)

FWIW: Those cams would work much better in LS7 heads than L92/LS3 heads. Even though they are both rectangular intake port heads the cam requirements are different for each.

Just my $.02

miami993c297

iTrader: (6)

What does "Comp LSr Rectangle Cams" mean please?

Christian

Brian Tooley Racing

iTrader: (13)

Hot Rod tested four cams on a 6.0 with LS3/L92 heads, I thought it was a good article. Well, except for the last two pages that are missing. At least it has all of the dyno charts!

http://www.hotrod.com/techarticles/e...est/index.html

jegten

iTrader: (22)

you probably have figured it out by now, but, LS3/L92 heads have rectangular shaped intake ports, LS1/LS6 have cathedral shaped intake ports.

yamoda

I never thought for one minute that it referred to the shape of the lobe...........

cam

iTrader: (9)

I see a LOT of happy LS3/L92 cam owners in the 220-4 intake range and the 228-234 exhaust range. LOTS of them. I see lots of other threads with some bigger cams that they brag up are going to make big numbers and then magically they stop posting....

Lobes also seem happy with EPS, LSL, and not so much XER but the odd one here and there



All I can say for certain is am I ever pleased that I ordered a PatG custom grind EPS cam. Its installed now... numbers coming soon

Ragtop 99

iTrader: (7)

That's close to what I've seen for typical street cars. Mid 220s to 230 on the intake and 4* to 8* on the exhaust split. 113 - 115 LSA with 114 being popular.

I'd bet on the second cam, that you could cut the exhaust duration to 235* and only loose a few HP, most of it being above 6500, while gaining better low end drivability.

bo.benson

iTrader: (5)

I've been searching for quite a while and have looked at that article quite a bit along with the "battle of the bumpsticks article" that gmhtp did. I've been back and forth on whether to go spec cam or off the shelf. The one that caught my eye was the 273 LSr, no emissions here and drivablity issues being not such a big deal I favor the 112 lsa for my LS2/L92 build, and had good results on the article and showed pretty well over on ls1gto's cam list. This pretty much had me set on the cam. Then talked to Comp earlier just for recommendation and he said the guy that helped design the LSr lobes had the 281 LSr in his car and absolutely loved it.The lift is a little larger, but he assured me it would clear no problem without flycutting. So now back to decisions...

One thing that intrigued me is the flat torque tables that all the cams Hot Rod did versus all the high rpm spiking tables that gmhtp did?

bo.benson

iTrader: (5)

Here is the whole thing, not sure why the pages are messed up on their actual url.

http://hotrod.automotive.com/115281/...est/index.html