queso

A buddy of mine went with a 224/226 .58x 114LSA cam and 918's from COMP. It went into a 2002 T/A with all the boltons and just MAC mid-length tubes, and is the exact same setup as before except for the new cam, springs and pushrods.

On the same dyno with the same tuner only 4 months apart, the car put down 5% LESS torque down low up to about 4500 RPM. Then the cam wakes up and pulls to 6500 RMP putting out some 20hp more.

The reason he picked that cam was to improve BOTH the low-end torque and get better performance up top. That cam should not be a top-end cam, so why has it lost torque down low?

777

iTrader: (21)

Most any cam that is bigger is going to lose low-end and gain top-end. There is really no way around it. If he he lost 5% torque but gained 20rwhp then I'd say that is a good mid-high cam, which is what I would recommend to someone who wanted good low-end but a real nice top-end. I wouldn't be dissapointed in a 5% decrease in torque for 20rwhp.

pekkaz

20 rwhp over stock above 4500 with that cam is not good. LS6 cam can do that and looses none down low.

Can it be just faulty weather/DA correction ?

777

iTrader: (21)

My bad I read that wrong. I thought you went from that cam listed to a new bigger one. It should make more than 20rwhp more, but I don't know of any cams that will increase your torque linear to the increase in hp. It just doesn't work that way.

queso

That's what I thought. Does COMP chime in here to help out people?

Or should he contact COMP with both his dyno sheets and have then look at them? Maybe they can toss him some ideas of things to try...

When a similar cam went in (MTI C2 224/224 .581/.581 112LSA) my car, it already had a set of FLP headers and just boltons. Holy cow, the car instantly loved it and woke up nice. With the cam/tubes at the track, it put down 12 flat in the 1/4 @117 mph (I'm the world's worst driver) and dynoed 387rwhp.

krexken

Kinda sounds like the cam could stand to be advanced a few degrees but the hp gained does sound a little low to start with. Hmmmm.

Stu'sWS6

iTrader: (3)

I read it as the car had a cam already-and the new cam picked up 20hp??? Did you swap out the stock cam? or another aftermarket? Your post is slightly confusing-please clarify. Was the camshaft degreed during the install? Any chance you have a scan/pic of the dyno sheet?

queso

I'm sorry for the confusion. The car was stock except for the MAC tubes. It was dynoed like that. Some 4 months later he installed a 224/226 cam made my COMP and dynoed at the same dyno and by the same tuner.

The ONLY thing that has changed is the cam, matching pushrods and 918 springs. I think 20 rwhp is not a great gain, and even less so if you're loosing torque all the way to 4500 RPM with the new piece.

A few people we've spoken to, suggest the cam may be wanting a good set of longtubes to breathe better. Any opinions? Anyone from COMP willing to chime in?

TOZ

Hey guys, that is me. Yep the cam swap was form stock to a 222/224 0.569 114LSA. Not 224/226. Low end torque was ridiculos compared to the stock dyno pull. WTF is wrong here. and only 20HP gain passing 4500 RPMs. I have Mac mid lenghts headers with Hi-flow cats, cut out and Flowmasters for a catback.
The reason I went with this Cam set up is because I wanted a low - mid range power and instead of that I LOST torque.

The only thing here was the Cam swap, thats it. Same Dyno machine, same software, same tuner guy, same everything.

Can somebody help me figure this out ?????
I`ll attach the stock and the new dyno sheath tonight so you can se the differece.

oange ss

iTrader: (50)

shoulda went with a 218 ish or 220 ish cam

Stu'sWS6

iTrader: (3)

Regardless of the cam specs -222/224 , 218/220, etc.-the car should be making more power across the board now. If you look at someone's dyno sheet that had a 224 cam and all supporting mods and switched to say a t-rex or f13-the new cam will make more power pretty much throughout the pull.

I think that you have some kind of installation issue-I asked this already, but was the cam degreed? What is your preload? Lifters? Did you do the crankshaft position learn w/ tech2? A dyno graph would help this thread tremendously.

TOZ

DYNOS here.
Please compare them and let me know whats going on here.
The first one is the Stock cam and the second one the Comp Cam.

TOZ

I didn`t do any degree, I matched the 2 dots on the cam gear and the crankshaft, I followed every steps from LS1 how to`s. No lifters were installed. Only cam, springs and pushrods.

TOZ

ttttt

WS6snake-eater

Are the rocker tourqed down properly? You said the same tuner? Does this mean that the car was tuned? It may be a simple tuning issue. Auto or 6 speed? Could you be pushing threw the clutch if M6? Bad 3rd gear if Auto?

Lady Redhawk

iTrader: (6)

When I first read the title to this thread and your post, my thought was the headers! You get more torque with the headers. But, I also think more should have been gained than 20 hp too. More wrong than just the headers, I personally would look at the tune.....

Patrick G

iTrader: (14)

You're only comparing the power gain compared to where the stock cam peaked. At 5500 rpm, you gained 20 rwhp, but your power with the new cam kept climbing another 10 for a total of 365rwhp. Sounds closer to a 30 rwhp gain. Not bad for a cam only swap.

TOZ

The car is a M6, Rocker arms were tighten to 22Lbs. When I ment Tuner, ment the Same LS1 Edit, Same guy doing it and same Dyno machine.
That Cam suppost to be a low / mid HP range cam, and the main reason is that I`m not getting nothing in low/mid range, Stock is getting more. Clutch is good on the car.
I followed every step on how to do it. I just don`t know what is wrong.

Gman2002Z06

Kind of hard to compare the two graphs seeing how the stock graph show rpms across the bottom and the cammed graph shows mph...

Guess we have to a little rpm to gear matching to compare the two curves...

Peace...Gman

TOZ

Here are the numbers for the COMP Cam Dyno.

NEW CAM DYNO RPM NUMBERS
RPM HP TORQUE
3000 178 312
3500 218 328
4000 267 348
5000 334 349
5500 350 334
6000 358 313

No 4500 rpms numbers were given.