Surging
Thread Starter
Instructor
Joined: Jan 2010
Posts: 239
Likes: 0
From: Vancouver Island British Columbia
Surging
Hi Guys. I had a A & A charger, ARH, and Corsa exhaust installed and tuned. I have a 2008 Auto coupe. When on the highway cruising at about 75 MPH and I hammer the pedal down, the car down shifts 2 or three gears then grabs but starts to buck like crazy until I let off. I suspect I am probably hitting the rev limiter. Anything a guy can do to elliminate this or any thoughts. Thanks.
Le Mans Master
Joined: Aug 1999
Posts: 8,827
Likes: 10
Yes, give your tuner/installer a call and ask them what the hell is going on!
Seriously, we need more info... If you're on the limiter, then that should be obvious. Also, if at all possible, data log the run!
Seriously, we need more info... If you're on the limiter, then that should be obvious. Also, if at all possible, data log the run!
Thread Starter
Instructor
Joined: Jan 2010
Posts: 239
Likes: 0
From: Vancouver Island British Columbia
It appears when this is happening the "traction control active" display comes on. I am at approx. 5800 RPM and doing about 70 MPH. Is it possible it is detecting tire spin? If so anyway of curing this besides kicking out TC mode?
Drifting
Joined: Sep 2009
Posts: 1,330
Likes: 61
From: Nantucket MA
Turn off the TC and see if it still does it. You should know it you are hitting the rev limiter, keep your eye on the hud and see what the RPM's are. Depending on how much HP you are making it is possible to get wheel spin at that point.
Melting Slicks
Joined: Mar 2007
Posts: 2,391
Likes: 23
From: Santa Barbara CA
I always use competition mode for this reason. You could and most likely are getting some tire spin at these speeds and the traction control is cutting power.
I don't know how much power you are making, but with 543 rwhp and 516 rwtq, the '67 in my avatar (122 magnacharged LS1) would spin the tires hard from a 60 mph roll. I actually got sideways on the freeway once by accident downshifting into 3rd. That was with 335/30/18 Michelin Pilot Sports.
That car obviously didn't have traction control, but it would have been kicking on like crazy at WOT in 1st, 2nd, or 3rd gears.
Andy
I don't know how much power you are making, but with 543 rwhp and 516 rwtq, the '67 in my avatar (122 magnacharged LS1) would spin the tires hard from a 60 mph roll. I actually got sideways on the freeway once by accident downshifting into 3rd. That was with 335/30/18 Michelin Pilot Sports.
That car obviously didn't have traction control, but it would have been kicking on like crazy at WOT in 1st, 2nd, or 3rd gears.
Andy
Thread Starter
Instructor
Joined: Jan 2010
Posts: 239
Likes: 0
From: Vancouver Island British Columbia
Thanks for the replys guys. I will find a wide open spot and play around with turning off the TC and go to competition mode. I want to learn to walk before I run.
Thread Starter
Instructor
Joined: Jan 2010
Posts: 239
Likes: 0
From: Vancouver Island British Columbia
Tried it a few times with the TC off and it seemed to cure the problem. Must of been the traction control pulling out timinmg and fuel. At 70 MPH it almost seemed more dangerous to me for it to kick that stuff out (fuel and timing) then to let the car do its thing. When it surged it threw me around like a rag doll. Good thing I only have a small amount of free space because of my large frame. LOL.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski