KrisR

iTrader: (2)

Just curious what a good cam would be to use for the very-good '01+ Corvette-style exhaust manifolds, stock LS6 heads, LS6 intake.

I know that many prefer a reverse-split for factory-headed/intaked cars with long-tube headers. Maybe something like a 224/228 would work well with factory manifolds/cats? I know the CheaTR cam is popular but I'm not that interested in a stockish idle, I would be more interested in max hp/tq.

I'm prepared for those who say...'just get headers' but I know the factory manifolds are pretty good and if I can make up most of it with a proper cam choice for my needs I would rather do that.

Katech_Jason

iTrader: (19)

The Katech torquer cam 204/218@.050 .551 lift 112LSA

KrisR

iTrader: (2)

I can't see what that would gain my over my factory '02 LS6 cam? It's almost identical, except its on a 112 instead of a 117.5?

Katech_Jason

iTrader: (19)

You're right, it's very close to a stock LS6 cam but with tighter lobe centers. Here's the gains it made on a stock LS6. These are RWHP numbers.

RedLT4Mike

iTrader: (4)

tsp 231-237

black_z

iTrader: (4)

Kris, maybe try calling thunder and see if they can do the cheaTR cam with a lower LSA.

LS1 SPEED

iTrader: (22)

sorry, but with stock manifolds that cam would be a bad choice.

Patrick G

iTrader: (14)

The CheaTR is the ideal cam for your application. If you want it to lope, it's as simple as lowering idle speed. A CheaTR at 700 rpm is mean as ****! 900 rpm idle is stealth. You decide how you want it to sound. Cams with too much overlap will run really crappy with manifolds.

Felix C

Hello Jason,

How does the engine idle? I mean does the 112 LSA result in lope at idle? Also is the centerline for an lS6 or an LS1? I am asking in case different length pushrods are required for an LS1 engine.

Are there any dyno numbers available with a vehicle equipped with headers and high flow cats?

I just noticed on your dyno that the before install values for the CTS-V are 320hp and 310 torque. Is that a little low for a V? Or does it read low due to the Mustang Dyno?

KrisR

iTrader: (2)

Thanks for the suggestions...

Maybe someone from TR can answer this question.....(or anyone else can too if they have experience)....

How much power/tq gain could I expect with a CheaTR cam over my factory LS6 cam in my '02 Z06? I will be getting a professional dyno tune and I will have a Halltech Stinger intake setup and factory exhaust/cats/manifolds.

???

Patrick G

iTrader: (14)

The CheaTR cam gains 30-35 rwhp over an LS1 cam with LS1 heads running manifolds. I would expect the CheaTR would gain 15-20 rwhp over the LS6 cam based off of dozens of dynos. Again, adjusting idle speed will give you the sound you're looking for.

KrisR

iTrader: (2)

Thanks,

Honestly I don't care that much what it sounds like. I guess what I really meant to say in my original post was that if there was a cam similar to the CheaTR in design but was more aggressive and traded off a stock-sounding idle for more hp/tq I would go for the more aggressive cam. I'm under the impression that the CheaTR was designed more for a stockish idle and good performance than max performance (with no regard to idle quality) with stock manifolds.

Hope I'm explaining myself a little better.

Maybe something like a 'CheaTR on Steroids' type of thing....220ish/230ish with .600/.580 on a 115 or something????

On a side note, my basic goal is to make 405rwhp with the car....it says '405' on the fenders so I'd like that to be the rwhp number. Anything more would just be gravy.

With the CheaTR, Halltech Stinger, stock heads/intake/TB/exhaust, a 25% ASP pulley, and a good dyno tune, is it a possibility? My car made 368/361 SAE on a Dynojet bone stock.....so I'm basically looking for a ~40rwhp gain.

Patrick G

iTrader: (14)

The CheaTR was designed to make the most power under the curve while running stock exhaust, hence the late intake valve closing, the early exhaust valve opening, the large I/E duration split and the wider LSA. The stealthy idle was a side benefit of the design, but not the original goal. The original goal of the CheaTR was max power with manifolds, PERIOD.

Once your overlap exceeds a certain point, the log manifolds cannot expel the exhaust properly and the intake charge becomes contaminated. Power drops. That's why you have to pay such close attention to valve events when selecting a cam when running manifolds. It's very different than how you choose a cam with headers. Thunder Racing spent years developing the grind and they now have literally hundreds of customers running the cam with excellent results. If you want a beefier version of the CheaTR, call Geoff at Thunder Racing and let him design you one. But keep in mind, the homework and trial & error has already been done on this so there's no need to be a guinea pig.

Redneck Z

iTrader: (3)

I've considered upgrading to this cam for some more power. What kind of spring life do you see with this cam? How long can you realistically go on a set of springs?

KrisR

iTrader: (2)

Good explaination.....thatks Patrick.

-Kris

UMIRacing

Felix,
I can't speak for Jason, but, knowing a little about this cam, this is a drop in replacement for the LS6. It has identical lobes to an LS6. The difference is in the timing.
The idle on this is not much rougher than stock.
This thing pulls so hard in that V, and when the headers were added, it was like a totally different car. http://www.katechengines.com/street_...%20Headers.pdf
Again, I can't say for sure what everything is, but I think that should answer your question, don't you think Jason???

Felix C

You answered the most important questions-idle and output with headers. The remaining questions are really inconsequential.

I am interested. Will contact off board.

fasteddyss

iTrader: (1)

I have spent quite a bit of time researching cams on this website. Based on this I would have asked Patrick G for input in your situation. He has spent considerable time and effort on this issue in the past. Search for his thread on reaching 400rwhp with stock manifolds.

Good Luck!

Ksett

I don't see your car making 405 to the wheels. Even the stronger cars like yours are making around 400 rwhp with LG headers and at least a 224\224 cam plus UDP, ported throttle body etc... If it does it will be a first.

Felix C

I meant my questions regarding lobe centerline and Mustang dyno numbers were inconsequential. I was not referring to questions and answers by other folks.