JBsC5

Stephen,

I have a 2001 Z06 that I'm thinking of throwing a cam in. Probably pulleys and oil pump mod at the same time.

Would this stealth cam you have be a good choice to hit 400 rwhp with stock ls6 heads?

which springs do you recommend forgetting about cost of the springs and looking for the best reliability? Crane duals? Rev 7716's

Would this cam require LS1edit to avoid getting the P0300 misfire code or will the specs on the cam not require it?

Thanks in advance for your advice.

JB

Bill00Formula

iTrader: (4)

I guess I don't get all these variations in RWHP numbers. I have a '00 formula, 6 spd, all the bolt ons, w/ MTI stage II ls6 heads (5/02, no milling), c1 cam and at the time stock rearend and gears at the time and dynoed 423 RWHP (no cats). The only weak point that I know of is the crappy y-pipe from grottyhann.

I thought that once the cars are heavily modified, alot of the stock variations in rwhp are eliminated other than the computer.

Colonel

Yes, the lift is .581/.581 as mentioned in the original post.

Yes, it has stock exhausts, QTP headers, a cuttout, and yes, the engine does indeed have spark plugs...as mentioned in the original post! :p Just pickin' on ya'll.

MTI's website says $2795 plus exchange for Stage II heads. They sell new LS6 cores for $1200.

I'll see about getting the dyno sheets scanned next week. My scanner is

Colonel

Yes, I think this cam would be a good choice to hit 400 RWHP with bolt-ons and stock LS6 heads with an M6.

I trust MTI's choice of Manley springs as far a single springs go. If cost doesn't matter, have the heads setup to run dual valvesprings. Then run MTI's Femera springs. This is what I have and it is the absolute best choice for reliability.

I don't know much about misfire codes. I've always just deleted them before they happen. I would think that with the idle set properly, you wouldn't have a problem with them (assuming an almost stock idle is an indication) but I don't know for sure. If you are dead set on not deleting the misfire codes, I'd ask Jayson at MTI about this first.

Colonel

There are always variations. You can dyno the car one day at one number, come back 6 months later with no changes and dyno something else. It's just a fact of life.

As far as your car compared to mine, there are several differences...

You have a C1 cam, I have the Stealth II. These cams are much different. The ramp rates are more aggressive with the Stealth, the Stealth II has an LSA of 116 instead of 112 and a lift of .581 instead of .561.

My LS6 heads are shaved to bring compression up 1/2 point.

I have a 3" into 4" Y-pipe with a 3.5" I-pipe and cuttout (no exhaust restrictions here!)

There could by tuning variables.

Drivetrain variables like the driveshaft, gearing, wheel and tire weight and size.

And then you have the normal dyno variances like the correction factor.

JBsC5

Thanks.

I'll give Jayson a call. A lot of guys in crazy emissions states like NJ are looking for a hotter cam that doesn't need ls1edit to meet emissions.

I don't know much about it but there seems to be a concern about putting ls1edit on a car that might be tested using some new test..(plug into pcm for alterations)

I don't know a lot about it..so I'm just sort of trying to find a cam that might not need ls1edit.

Not totally dead set against ls1edit..to cancel misfire codes just thinking it might be a cool alternative.

A buddy of mine who put in a relatively mild comp cam recently put the stock spark plugs back in and got rid of the misfire codes until he turned on the A/c. (was getting codes at idle with the usually suggested aftermarket plugs at first because of the distance the plug went into the head or something) Anyway...

I could be totally wrong about this new emissions testing thing so don't take me to the mat on it.

Lots of Z06 guys are looking for about 400rwhp with headers and a stealth cam and if they can avoid the ls1edit tuning issue as you stated in one of your posts and avoid po300 codes that would be cool.


I wonder would the crane duals be an easier alternative to the duals you mentioned which sound like they have to pull the heads to install properly?

I have heard good things about the manely springs as well. What about the rev 7716's?

Colonel

Yes, the heads have to have work done to them to install the Femera dual springs. They're physically larger than regular springs. I really don't know much about all of the different springs that are available.

I'm glad I live in Alabama! No emissions testing. I hope it stays that way.

JBsC5

Thanks..I'll check out MTI and find out about the p0300 codes without ls1edit. Not a big deal just something I was curious about as I read your post.

With edit it seems 224/224 .57x 114lsa emissions tailpipe testing doesn't seem to be a problem.

Thought maybe the 116lsa was a key.

Thanks and congrats on your cool ride.

Colonel

If 224/224 114 is fine then this cam will be even better. The 116 does help to clean things up over a narrower LSA.

Linear Velocity

iTrader: (1)

Great numbers! Most others probably won't get the same numbers because of the $$$ and minimal gains of the LS6 heads though. Also I think it's important to refelct that you're running a stock 3.23 rear and a carbon fiber d/s, I'm not trying to say it's dyno pimped but that setup will probably not be run by most heads/cam cars and therefore won't get as high numbers. Just my 02.

Colonel

I said this once but it's worth saying again. I think what's really important is not to pay so much attention to the numbers made after the heads/cam installation but rather the gain between before and after it. The 3.23 gears and carbon fiber driveshaft were there before and after. The bottom line is, this packaged PICKED UP 71.6 RWHP no matter which way you slice it or dice it.

Just for argument's sake, I don't think a C/F driveshaft is worth very much over an aluminum one. You're only talking about 3-4 lbs but that weight swings a very tight arc. The weight is close to the center of rotation so it really doesn't make much difference.

DG Gordon

Good numbers, I am considering going to the LS6 heads and was wandering if it would be worth it over the TEA 1.5 heads I have already.
For what its worth mine made 410rwhp with the stock catback and 419 without it.

JBsC5

Sent email to MTI.

Thanks

JB

Kent1

Colonel that is a great setup. It does not surprise me that your car makes this kind of power because of previous successes with your cars. You have the ultimate stealth setup and will catch alot of fellow races off guard. What is the biggest cam that MTI sells. Cheers....

lsx24

iTrader: (45)

I think more specifically, total overlap is the key to passing emissions. This can be accomplished with an infinite number of cam specs.

JBsC5

Ok. Let me put it this way. I thought one of the statements in the beginning of this thread "no tuning necessary meant" the p0300 misfire codes were not set by this MTI Stealth Cam 2.

Lots of guys would jump on this cam if that was the case. Not everyone is ls1edit capable and not everyone has a tuner near them.

Considered the TERM Stealth might mean no codes set by PCM.

Hopefully in the near future we'll hear from Jayson at MTI and we will find out what their research shows.

To be very clear. The beauty and benefit of this cam is not based on the ability to operate without pcm tuning. Thats just something I would like to see.

The excellent power output throughout the rpm range is Key.

Congrats

JB

Colonel

"What is the biggest cam that MTI sells."

The biggest one that they advertise for a 346ci engine is the X1 cam (230/227 .591/571 112 LSA) but they can also do custom cams of any shape and size.

"I thought one of the statements in the beginning of this thread "no tuning necessary meant""

To be clear just incase you're referring to me, I've not said that this cam requires no tuning to be emissions compliant. I simply don't know.

dis3as3d

How do you think this cam would perform in larger ci applications?

lsx24

iTrader: (45)

I don't remember an update, but what is the status of the dyno graph posting? Let me know if you need someone to host it. thanks.

Colonel

A larger engine would make the cam act even smaller than it is. It would idle even smoother than stock and would make peak power at a lower RPM. I would want a bigger cam than this for 400 CI+.

I'll get the sheets scanned tomorrow.