Active handling ?
Tech Contributor
Joined: Oct 1999
Posts: 41,063
Likes: 9,827
From: Charlotte, NC (formerly Endicott, NY)
What do you mean by the AH turns on? What does the car do? Are the rear brakes being applied or are the front brakes being applied? Is one brake being applied on front or rear? Does the car swerve?
Based on your comment I will assume he is going in a straight line and the car is slowing down and the traction control indicator is turned on and the car is slowing. I suspect that he may be having the Traction Control turn on. This could be due to a tire size problem. What size tires does he have front and rear?
Bill
Based on your comment I will assume he is going in a straight line and the car is slowing down and the traction control indicator is turned on and the car is slowing. I suspect that he may be having the Traction Control turn on. This could be due to a tire size problem. What size tires does he have front and rear?
Bill
Thread Starter
Racer
Joined: May 2004
Posts: 270
Likes: 0
From: NORFOLK VA.
Does the car swerve? Yes
Based on your comment I will assume he is going in a straight line and the car is slowing down and the traction control indicator is turned on and the car is slowing. I suspect that he may be having the Traction Control turn on. This could be due to a tire size problem. What size tires does he have front and rear?
Bill
Based on your comment I will assume he is going in a straight line and the car is slowing down and the traction control indicator is turned on and the car is slowing. I suspect that he may be having the Traction Control turn on. This could be due to a tire size problem. What size tires does he have front and rear?
Bill
Tech Contributor
Joined: Oct 1999
Posts: 41,063
Likes: 9,827
From: Charlotte, NC (formerly Endicott, NY)
What size? 295, 265, 275, 305?? If the rear tire diameter is smaller than the front tire diameter the TC system will be unhappy. Usually it will stay happy if the tire diameters are equal and will definitely be happy if the rear is larger than the front. I run 17 inch 25.3 inch diameter tires all the way around when on the track. This has not upset my AH or ABS even at speeds of 150. The few times I have forgotten to turn off TC I haven't had a problem but I haven't been at that high of a speed with equal size tires with TC turned on. However, at 140 the rear tire rotation speed may be close enough to the front that the system intreprets the tire as slipping. This may be due to a design variation in dead band size as vehicle speed increases thus limiting allowable wheel speed differences as speed increases.
Bill
Last edited by Bill Dearborn; May 2, 2007 at 11:38 PM.
Le Mans Master
Joined: Sep 2004
Posts: 5,707
Likes: 4
From: Los Angeles
Furthermore, when running equal tires all the way around, it is not uncommon to wear down the rears faster than the front creating an ever so slightly smaller diameter in the rear. At high enough speed, this could compound and translate into enough of a mph difference that the computer interprets slippage.
Racer
Joined: Feb 2007
Posts: 431
Likes: 5
From: Chico CA
If front is equal or smaller, system will be HAPPY. I know what you meant but it might have been confusing to him.
Furthermore, when running equal tires all the way around, it is not uncommon to wear down the rears faster than the front creating an ever so slightly smaller diameter in the rear. At high enough speed, this could compound and translate into enough of a mph difference that the computer interprets slippage.
Furthermore, when running equal tires all the way around, it is not uncommon to wear down the rears faster than the front creating an ever so slightly smaller diameter in the rear. At high enough speed, this could compound and translate into enough of a mph difference that the computer interprets slippage.
Advanced
Joined: Nov 2004
Posts: 77
Likes: 0
i have 265-35-18 up front and 295-35-18 in rear and my car swerved at hi speed and tc light came on this doesn't happen all the time. I think i will just t/off tc from now on kind of feels like one rear break could be comming on.
Tech Contributor
Joined: Oct 1999
Posts: 41,063
Likes: 9,827
From: Charlotte, NC (formerly Endicott, NY)
Getting ready for an open track event today I put about 20 miles on my car with 315/35/17s all the way around. Left the AH in full mode with TC active. Speeds peaked at 80 down to 20 and back up (burnishing pads/rotors). No problem with the TC or AH.
Bill
Bill
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
