[Z06] "Engine drag control active" what does this mean
Thread Starter
Racer
Joined: Jul 2009
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From: Kingdom of Bahrain
"Engine drag control active" what does this mean
Fitted brand new Nitto Invos 345 x 30 x 19 today and from the moment I hit the street, I get that message "Engine drag Control Active" - under even medium acceleration
Anyone know what it means?
John (Bahrain)
Anyone know what it means?
John (Bahrain)
Melting Slicks
Joined: Oct 2001
Posts: 2,643
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From: SoCal
it means the ECU thinks there is some tire slip in decel and is cracking the throttle to reduce the engine braking effect. very common if you put taller tires on the rear (only).
if you do a search you'll find many threads about it ...
http://forums.corvetteforum.com/c6-z...ol-active.html
if you do a search you'll find many threads about it ...
http://forums.corvetteforum.com/c6-z...ol-active.html
Race Director
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From: Supporting the Corvette Community at Abel Chevrolet in Rio Vista, CA 707-374-6317 Ext.123
St. Jude Donor '08
RICH
Tech Contributor
Joined: Oct 1999
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From: Charlotte, NC (formerly Endicott, NY)
Its not the old days anymore. You just can't go around throwing any size tire on the C5's/C6's. You are not alone. A lot of people have been nailed by not doing their homework on tire diameter.
Bill
Bill
_"SCOTT"_
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From: South Florida
Thread Starter
Racer
Joined: Jul 2009
Posts: 406
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From: Kingdom of Bahrain
It means that you should have changed the fronts to a 295/30/18 at the same time to keep the front to rear tire diameter bias even. The cars have a front to rear split of about 1.1" IIRC, but now you have changed that. It is not hurting anything. The car is warning you that it is sensing the rear wheels trying to lock up and is applying throttle to keep it from doing so. Of course, the rear tires are not really locking up under compression braking, but since you changed the diameter of the rear tires, the car thinks they are spinning slower then the fronts so it does this. Order some 295's for the front and you'll be fine.
RICH
RICHWhat I am doing is balancing lateral grip and as the Cups are superior to the Nittos in this respect and as 285s are not avaiable where I live and as 295s would have needed a change in wheel width - looks like I am stuck with it.
Does anyone know if it results in a power loss?
Thanks
John
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From: San Jose California
Race Director
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From: Supporting the Corvette Community at Abel Chevrolet in Rio Vista, CA 707-374-6317 Ext.123
St. Jude Donor '08
Actually I also changed the FRONTS but to Michelin Cups 265 x 35 x 18 so that mabe made the situation worse
What I am doing is balancing lateral grip and as the Cups are superior to the Nittos in this respect and as 285s are not avaiable where I live and as 295s would have needed a change in wheel width - looks like I am stuck with it.
Does anyone know if it results in a power loss?
Thanks
John
What I am doing is balancing lateral grip and as the Cups are superior to the Nittos in this respect and as 285s are not avaiable where I live and as 295s would have needed a change in wheel width - looks like I am stuck with it.
Does anyone know if it results in a power loss?
Thanks
John
295's do not REQUIRE a wider wheel, it is just suggested to run a wider wheel. I have been running them for 2 years on not only PS2's, but also a full set of Hoosier A6's and a full set of R6's. On the track, Auto-x or street there is no issues and the tires work great.
Like others said, there are no ill effects of the "Engine Drag" warning.
RICH
Race Director
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From: Supporting the Corvette Community at Abel Chevrolet in Rio Vista, CA 707-374-6317 Ext.123
St. Jude Donor '08
Safety Car
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From: Westlake Village, Ca
There are ton of us guys running the 345's nittos...
No biggie , and the homework wasent all that hard either..
As always Rich with great info
Cruising
Joined: Oct 2012
Posts: 14
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From: Kirkland WA
I just got 275/35/18 and 345/30/19 michelins super sports about a month ago, and I get the warning only at high speeds when I down shift from 6th to 4th or so, and even then its only once in a while. It doesn't bother me, but would have looked at 285's or 295's(if available) for the front had I known... oh well. Doesn't hurt anything and I don't physically notice the car doing anything different.
Tech Contributor
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From: Charlotte, NC (formerly Endicott, NY)
I just got 275/35/18 and 345/30/19 michelins super sports about a month ago, and I get the warning only at high speeds when I down shift from 6th to 4th or so, and even then its only once in a while. It doesn't bother me, but would have looked at 285's or 295's(if available) for the front had I known... oh well. Doesn't hurt anything and I don't physically notice the car doing anything different.
Bill
Cruising
Joined: Oct 2012
Posts: 14
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From: Kirkland WA
Yep, and to be honest with you the hand full of times its happened, I can't say that I've noticed the car do anything. It must be such a small amount t of throttle input that under somewhat normal street driving it isn't really enough to notice...
