Traction Control off means hotter engine profiles?

[Bluemill]

I was getting my annual inspection sticker the other day and was biding my time in line by talking with a mechanic who seemed interested in my 2000 coupe 6 speed. He said he had a 2005 GTO with the LS2 engine and 6 spd. He told me that the traction control off setting puts the engine in much higher performance ignition and fuel injection timing profiles. He also said you would get better fuel economy. I told him my understanding was that if you started to slip on a rear wheel under load that the ABS would kick in and reduce fuel to the engine. It would only do this when you lost traction. Who's right?

Also, I have got a nagging soft rattle in the firewall/driver side dash area that I've put a lot of work into. I thought for sure that it was the HUD projector, but after removing the whole dash, the whole instrument cluster, and the HUD unit, it still does it. Could there possibly be anything in the heater core/evaporator area that could do this? It does it all the time but is most noticable at 30 mph when going over "cracked" or older asphalt.

Thanks for any help you can offer-

GBWBook/Bluemill

 

[MsSchroder]

He said he had a 2005 GTO with the LS2 engine and 6 spd. He told me that the traction control off setting puts the engine in much higher performance ignition and fuel injection timing profiles. He also said you would get better fuel economy.
GBWBook/Bluemill

I don't think I've ever heard that about the TC system on the vette.

 

[terlox]

Although I haven't experimented on my C5 personally I have talked to people who say with TC on their car feels like a dog compared to when it is off. I'd be interested to know how much truth there is to that though.

 

[68Roadster]

Thats very interesting. My wife drives the new one and she babies it all the time so I don't think it could get any better gas mileage.
I think I will give this a shot on my Silverado though. The computer shows me getting about 14.2 mpg and every little bit would help these days.

No idea on your rattle unless it's the door speaker...

 

[crooze]

Although I haven't experimented on my C5 personally I have talked to people who say with TC on their car feels like a dog compared to when it is off. I'd be interested to know how much truth there is to that though.

I was just thinking the other day that it feels like the car pulls harder with the TC off or in Comp Driving mode. Could just be my imagination.

 

[VETTEX2]

complete BS

 

[crooze]

I know at WOT with the TC off my tires will chirp when it shifts. Since the TC is not trying to stop that you would be at a higher RPM after the shift, which could result in it feeling faster. Just my thoughts.... or it could be just "complete BS"

 

[kenc5]

I had an annoying rattle like you describe. It was a nut that is revealed when you open the hood. It is on the drivers side and it tightens up the windshield wiper assembly. Once that was tightened the rattle went away. If I remember correctly, I needed an socket and extension.
Good Luck,
Ken

 

[Bluemill]

The horendous wiper frame rattle!

Dear Ken,

Yeah, I had that one too. It sounded like a balpine hammer rattttlin' around when I hit a stiff bounce or pot hole. I found it after I had taken off the whole damn dash cover- but at least I found it. I was convinced that it was the HUD projector that was loose on that one! The wiper frame bolt did not take a lot of torque before she felt like the threads may be going- so I just stopped.

This is more like a soft rattle, definitely there, but not a killer knock like the one above. It sounds like it's in the same quadrant- I think.

Thanks for the effort.

Bluemill

 

[Remo]

I had an annoying rattle like you describe. It was a nut that is revealed when you open the hood. It is on the drivers side and it tightens up the windshield wiper assembly. Once that was tightened the rattle went away. If I remember correctly, I needed an socket and extension.
Good Luck,
Ken

:confused and how does this relate to "Traction Control off means hotter engine profiles?"

 

[Bluemill]

Check out original post of the topic, second paragraph. Are you a Lawyer?????????

 

[Patrick]

Bluemill,
No, Remo isn't a lawyer. He's just getting antsy at the thought of having to put his Vette away for the winter in a few weeks. Looks like Tammy and I are going to have to start upping Remo's meds earlier than anticipated. :L


-Patrick

 

[Remo]

Also, I have got a nagging soft rattle in the firewall/driver side dash area that I've put a lot of work into. I thought for sure that it was the HUD projector, but after removing the whole dash, the whole instrument cluster, and the HUD unit, it still does it. Could there possibly be anything in the heater core/evaporator area that could do this? It does it all the time but is most noticable at 30 mph when going over "cracked" or older asphalt.

Thanks for any help you can offer-

GBWBook/Bluemill

Bluemill,

I stand corrected - the non conforming subject did appear in your second paragraph as quoted above.

Remo:cool

 

[vett boy]

I think it's B.S also.But with cold wet and snow just ahead i'll check it out on my way to Florida and let you know.HAR HAR

 

[Patrick]

Bluemill,

I stand corrected - the non conforming subject did appear in your second paragraph as quoted above.

Remo:cool

Remo,
Bluemill is right- you are starting to sound like a lawyer.

Stop that!

:L
-Patrick

 

[Bioscache2]

awww Don't digress, I was hoping Hib or C4/C5 would come post an answer. Speaking of hib, where has he been? Haven't seen him around in forever.

 

[vettepilot]

Hotter engine profile... HA that's a good one.

The manner in which the T/C works could lead one to think that, but I don't think so.
When T/C is ON... if the system detects wheel spin or loss of traction, the computer initially retards the ignition advance which reduces the engine torque, thereby reducing the wheel spin. When the T/C is turned off or if the active handling is in the Competative mode, then wheel spin is not checked, but is allowed to continue, being controlled only by the driver.

So, in a nutshell, fuel flow is not reduced, ignition timing is used to reduce power.

So therefore, whether the T/C is ON or OFF, it should make no difference in fuel economy when the vehicle is driven in a normal manner. The key words here are normal manner. I hope that helps on the T/C question.
Perhaps Hib has more detailed/expanded information if he sees this question.

vettepilot