Replace clutch/flywheel, now lots of extra power, was i in limp mode before?

[NDSP]

I feel like a dumbass asking this, but here it goes. I chunked a spring out of my clutch plate autocrossing a few weeks ago and end up replacing the clutch and flywheel with the excedy 500 clutch and light weight flywheel. After I got it installed and the car running again, I noticed it seemed peppier. So I did a few test runs from a stop and it lit up the tires in 1st,2nd, and first part of 3rd. Prior to this my car wouldn't do that at all. I test drove a 2012 a few years back that did this and was pleasantly surprised, but when I got mine it didn't do that. I attributed it to that fact that mine had wider and stickier tires. Both the test drive car any my car have a CAI and axle back and where both Track Pack cars. Anyway, I really don't think a light weight flywheel would make that big of a difference, which leaves me wondering. Has my car been in limp mode ( is there such a thing ) this whole time and got "reset" when I disconnected the battery during the clutch install. It didn't have any codes or anything? So what gives?

 

[stkjock]

there is a limp mode, but when that happens it should throw a CEL/wrench and indicate such.

probably more the fact that the adaptive learning got cleared in the ECU

as far are the difference in the Track pack cars vs. yours, what gears in those vs. yours?

the FW will help some in letting the engine rev

 

[NDSP]

Mine is a track pack also. 3.73's. It just seems so weird that I went from not frying the tires to frying the tires with nothing more that a lighter flywheel and a battery disconnect/reconnect. It is 8 lbs lighter and most of the lightening is on the outer part of the flywheel. I can see freer revving, but it pulls so much harder now. I'm at a loss, but I'm not complaining. Makes me wonder what my lap times could of been, if it hadn't been so down on power.

 

[Wicked GT]

You will notice a little bit in the seat dyno but as Dave mentioned it was most likely the computer... I have noticed my car runs harder for awhile after reloading the tune or disconnecting the battery.

 

[GrabberBlue5.0]

Maybe your new clutch is grabbing better, stock clutch was slipping?

Mine feels like it hits hard sometimes and feels like mush other times with 62k on my stock clutch

 

[Morris]

If you couldn't light up the tires in first with 3.73's then something was wrong with your car.

 

[NDSP]

If you couldn't light up the tires in first with 3.73's then something was wrong with your car.

yeah, I definitely realizing that. But what, no codes, no engine light. It is weird.

 

[AlbertD]

To me it sounds like your clutch was slipping before and now it isn't. Did you buy the car used? Perhaps the previous owner wore the hell out of the clutch.

 

[stkjock]

I gotta believe that he would have noticed the clutch slipping

 

[GrabberBlue5.0]

I gotta believe that he would have noticed the clutch slipping

With my stock mt-82 clutch it's kinda hard to tell. It seems like it slips just enough to prevent the tires from breaking loose but not so much that the rpms climb while the speed stays the same

 

[stkjock]

/\ that sounds more like the computer nannies

 

[AlbertD]

I gotta believe that he would have noticed the clutch slipping

I hear you, but you never know with some people. I am judging solely by reading the facts in the OP's post... Car down on power (or so it seems), change out clutch/disc battery, now car is up on power.

Either the clutch was slipping before and now it isn't resulting in more power transferred to the ground or disc/reconnecting the battery was the fix. I have a hard time believing that a simple battery disconnect resulted in - no tire spin at all -> tire spin in 1,2, and 3.

 

[GrabberBlue5.0]

/\ that sounds more like the computer nannies

Maybe, but at 62000 miles on my stock clutch even with the tc/sc fully off it will still do this

I can easily blast the tires when I want to, but if I slowly roll into the throttle sometimes the tires will begin to break loose and other times this potential "clutch slip" occurs.

 

[Grabber Blue 5.0]

With my stock mt-82 clutch it's kinda hard to tell. It seems like it slips just enough to prevent the tires from breaking loose but not so much that the rpms climb while the speed stays the same

/\ that sounds more like the computer nannies

Sounds like clutch protection kicking in.

 

[BlueDevil]

Sounds like clutch protection kicking in.

Never heard of clutch protection... Is that only on the newer 5.0s?

 

[NDSP]

I've had slipping clutches before, I really don't think it was that. The car does have a CAI and axle back. I don't know if it had a boxed tune or not. One of the things on the list is a custom tune, once suspension is done and long tubes with catted H are added.

it has 34K miles, just for the record. The stock clutch plate lost a spring when I banged the rev limiter in second gear auto crossing.

 

[GrabberBlue5.0]

Sounds like clutch protection kicking in.

Is there some sort of clutch protection built into the engine management parameters?

 

[Grabber Blue 5.0]

Never heard of clutch protection... Is that only on the newer 5.0s?

Yes.

Is there some sort of clutch protection built into the engine management parameters?

Yes but it can be tuned out by some of the better tuners.

 

[NDSP]

That clutch protection sounds like some serious nanny ware, but I guess I can understand it in a warranty protecting kind of way. My clutch that came out aside from the missing spring still looked good as did the flywheel.

 

[sh4rkbayte]

Has anyone figured out how to disable clutch protection with SCT? Or do you have to have the tuner do it? Can I just copy/paste the tune file on a PC and change that one parameter and reload the tune?