Wheel hop
Race Director
Joined: Dec 2013
Posts: 12,502
Likes: 3,631
Something does not sound right, unless your where running in comp or full off mode.
In standard Nannie's full on, the TC should be clipping power when the wheels start to spin to begin with.
Safety Car
Joined: Nov 2006
Posts: 3,667
Likes: 159
I rarely get wheel hop, only remember it happening once on partially wet roads, and once at the drag strip when I was using launch control.
My Grand Sport came with the ZR1 axles (since it was a MN6 with magnetic ride suspension), so I'm totally guessing here but maybe the combination of magnetic suspension and axles help me on reducing wheel hop.....
I had the Goodyear GEN2s originally on the car, and on my 2nd set of Bridgestone Potenza RFs, and neither wheel hop when spinning. In fact, I accidentally lit them up on a hard 2nd gear acceleration pulling out of our parking lot yesterday.
Last edited by Seadawg; Jan 20, 2015 at 09:38 AM.
Pro
Joined: Mar 2006
Posts: 539
Likes: 87
From: SW Ohio
Dano Seadawg,
Thanks for the reply, I don't drive this car much, [have others] Yesterday the nannies were all on below 50 degrees, MN 6 magnetic ride, all stock. I think it's the tires & have never liked these GY F1 tires the front tires skip all the time even pulling out of the drive way.
Thanks for the reply, I don't drive this car much, [have others] Yesterday the nannies were all on below 50 degrees, MN 6 magnetic ride, all stock. I think it's the tires & have never liked these GY F1 tires the front tires skip all the time even pulling out of the drive way.
Race Director
Joined: Dec 2013
Posts: 12,502
Likes: 3,631
Two different system in effect here,
When moving forward, the VSS sensors (the front and back tires sensors) will check the rotation against each other, and with the nannies on, the traction control should clip power to stop the back tires from spinning (rotating much faster than the front tires). You can get a touch of tire slip before the system will kick in to reduce power, but the amount of rear tire spin that will cause wheel hoop should have the have the power clipped well before that happens with all the nannies on.
When the back end steps out from the front, the Yaw sensor in the car (under the radio) working with the steering wheel sensor (on the column) will detect this instead, and it's Active handing control that will clip power to bring the back end in line with the front. Active handling also works with the ABS to help pull the car out of danger if you get it too out of line as well.
So on that note, might want to check with your tuner, since it sounds like he tuned out TC in the Nannie all on mode, and maybe even disabled power hop control.
Last edited by Dano523; Jan 21, 2015 at 05:01 AM.
Safety Car
Joined: Nov 2006
Posts: 3,667
Likes: 159
Thanks for the extra explanation Dano523. I will check with the tuner, because you brought up some good stuff to check.
However, my 2011 has always "spun easily in a straight line" with all of the nannies on, much more easily than my 2008 C6 did. I just figured they got more aggressive from the factory.
The 2008 would scare me, because it would feel like it would almost stall when pulling out semi-hard from a 90 degree turn. I would almost get run over, trying to get up to speed at severely reduced power.
The 2011 has always fishtailed a little, and been very "smooth" on the reduced throttle, almost letting you kinda power slide if you pull out hard at a 90 degree turn. It has always got to 60 mph quickly, which I like.
But either way, I'm gonna learn more about my present tune
and, to keep it on topic with this thread, the 2008 never wheel hopped either, it would just scare me because it spun so easily in the colder DE climate with the Goodyear tires (it was a Z51 optioned LS3, MN6)
However, my 2011 has always "spun easily in a straight line" with all of the nannies on, much more easily than my 2008 C6 did. I just figured they got more aggressive from the factory.
The 2008 would scare me, because it would feel like it would almost stall when pulling out semi-hard from a 90 degree turn. I would almost get run over, trying to get up to speed at severely reduced power.
The 2011 has always fishtailed a little, and been very "smooth" on the reduced throttle, almost letting you kinda power slide if you pull out hard at a 90 degree turn. It has always got to 60 mph quickly, which I like.
But either way, I'm gonna learn more about my present tune
and, to keep it on topic with this thread, the 2008 never wheel hopped either, it would just scare me because it spun so easily in the colder DE climate with the Goodyear tires (it was a Z51 optioned LS3, MN6)
Le Mans Master
Joined: Mar 2001
Posts: 8,476
Likes: 3,975
From: Omaha
2020 Corvette of the Year Finalist (performance mods)
C4 of Year Winner (performance mods) 2019
If I am going in a straight line, like leaving from a red light, mine will easily spin in 1st gear, and will spin as long as I continue to stay straight, with ALL of the nannies turned on. Once I start drifting sideways, the power is reduced, however.
I rarely get wheel hop, only remember it happening once on partially wet roads, and once at the drag strip when I was using launch control.
My Grand Sport came with the ZR1 axles (since it was a MN6 with magnetic ride suspension), so I'm totally guessing here but maybe the combination of magnetic suspension and axles help me on reducing wheel hop.....
I had the Goodyear GEN2s originally on the car, and on my 2nd set of Bridgestone Potenza RFs, and neither wheel hop when spinning. In fact, I accidentally lit them up on a hard 2nd gear acceleration pulling out of our parking lot yesterday.
I rarely get wheel hop, only remember it happening once on partially wet roads, and once at the drag strip when I was using launch control.
My Grand Sport came with the ZR1 axles (since it was a MN6 with magnetic ride suspension), so I'm totally guessing here but maybe the combination of magnetic suspension and axles help me on reducing wheel hop.....
I had the Goodyear GEN2s originally on the car, and on my 2nd set of Bridgestone Potenza RFs, and neither wheel hop when spinning. In fact, I accidentally lit them up on a hard 2nd gear acceleration pulling out of our parking lot yesterday.
I've got magnetic ride and should have the ZR1 axles as well, but do still see wheel hop occasionally (maybe 15-25% of the time). Probably more so when stock on the GY Gen2s, less so with my PS2s and especially after the blower.
Race Director
Joined: Dec 2013
Posts: 12,502
Likes: 3,631
Thanks for the extra explanation Dano523. I will check with the tuner, because you brought up some good stuff to check.
However, my 2011 has always "spun easily in a straight line" with all of the nannies on, much more easily than my 2008 C6 did. I just figured they got more aggressive from the factory.
The 2008 would scare me, because it would feel like it would almost stall when pulling out semi-hard from a 90 degree turn. I would almost get run over, trying to get up to speed at severely reduced power.
The 2011 has always fishtailed a little, and been very "smooth" on the reduced throttle, almost letting you kinda power slide if you pull out hard at a 90 degree turn. It has always got to 60 mph quickly, which I like.
But either way, I'm gonna learn more about my present tune
and, to keep it on topic with this thread, the 2008 never wheel hopped either, it would just scare me because it spun so easily in the colder DE climate with the Goodyear tires (it was a Z51 optioned LS3, MN6)
However, my 2011 has always "spun easily in a straight line" with all of the nannies on, much more easily than my 2008 C6 did. I just figured they got more aggressive from the factory.
The 2008 would scare me, because it would feel like it would almost stall when pulling out semi-hard from a 90 degree turn. I would almost get run over, trying to get up to speed at severely reduced power.
The 2011 has always fishtailed a little, and been very "smooth" on the reduced throttle, almost letting you kinda power slide if you pull out hard at a 90 degree turn. It has always got to 60 mph quickly, which I like.
But either way, I'm gonna learn more about my present tune
and, to keep it on topic with this thread, the 2008 never wheel hopped either, it would just scare me because it spun so easily in the colder DE climate with the Goodyear tires (it was a Z51 optioned LS3, MN6)
Even with the Nannies on, should be able to spin the tires a touch initially, but the nannies should kick in (TC) to stop the spin before it gets out of control. Also to point out, when the TC steps in, should be getting a DIC notice.
So if you can keep the rear tires spinning in standard mode at will (say all the way through a smooth intersection length of time and my favor trick with three gears changes before I get to the other side of the intersection in comp mode), then there is a problem with the TC not activating/kicking in correctly.
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Burning Brakes
Joined: Aug 2011
Posts: 810
Likes: 188
From: andover mn
Talked to Doug Rippie today. HE said he puts a lot of ECS braces on our cars. Will not help much from a lot of dig racing or slipping the clutch off the floor. Just alittle more insurance. So I will be putting one on this spring.
Race Director
Joined: Aug 2005
Posts: 13,592
Likes: 187
From: Hudson WI
NCM Sinkhole Donor
I did it and I hope I never know if it works!
Pro
Joined: Mar 2006
Posts: 539
Likes: 87
From: SW Ohio
Had the car out again tonight 35 degrees. 13 GS MN6 adjustable suspension, turned off the TC and buzzed the tires several times under acceleration no wheel hop.
My question is does the TC on cause the hop?
My question is does the TC on cause the hop?
Race Director
Joined: Dec 2013
Posts: 12,502
Likes: 3,631
No, the TC does not cause the wheel hop, and it and power hop control should stop the wheel spin before it gets to the point that that you get wheel hop.
This is wheel hop at launch, and the driver it quick to get off the gas to prevent drive line damage
Here is a slow motion on wheel hop, and each time the tires goes from spinning to getting a bite, it translates a great deal of torque back through the drive line parts. In a vet, the drive line is not set up to take these amounts of torques from wheel as they hop, and will snap parts.
Melting Slicks
Joined: Nov 2010
Posts: 2,626
Likes: 195
From: On the east coast we drive until we die
I've helped push more broken Vettes off the track than I care to count. Most due to broken axles, diffs, trans from wheel hop. Bottom line, if you begin to feel it lift immediately.
Le Mans Master
Joined: Dec 2007
Posts: 8,375
Likes: 97
From: Somewhere in the Mid 9's TX
I agree with all of what Gary, Dennis and others have said. C5 cars, in my experience are more prone than C6's to suffer from wheel hop. The placement of the diff is about 1" difference.
The best advice I always give guys drag racing to avoid breaking rear end parts with a high hp stick car are two things. Clutch, and sidewall. Tire compound is also important. But start with the clutch and choosing a tire with sidewall.
The best advice I always give guys drag racing to avoid breaking rear end parts with a high hp stick car are two things. Clutch, and sidewall. Tire compound is also important. But start with the clutch and choosing a tire with sidewall.
Le Mans Master
Joined: Nov 2005
Posts: 7,059
Likes: 366
From: Kendall Park NJ
You are just spinning the tires which means that you are just falling farther behind the person that is next to you.
That is a good product but will make your car run much rougher on the street by transmitting more vibration through the drivetrain. Those along with their engine mounts, you will no longer need to worry about breaking them. The OEM engine mount usually gives way.
Burning Brakes
Joined: Jul 2013
Posts: 823
Likes: 7
From: Rosewood Heights IL
GForce1320 identifies wheel hop as the rhythmic twisting and unloading of the axles. During their testing, using different diameter axles stopped the wheel hop.
Things like rubber bushings and parts that "give" all contribute to the vibration worsening.
Things like rubber bushings and parts that "give" all contribute to the vibration worsening.
Instructor
Joined: Apr 2014
Posts: 122
Likes: 3
From: Macomb MI
Did you have "wheel hop" before you installed these mounts?
My 11' with manual trans and magnetic ride control hops like crazy. Sometimes it'd be nice to just be able to do a long burnout without letting off cuz of the dam hop.
My 11' with manual trans and magnetic ride control hops like crazy. Sometimes it'd be nice to just be able to do a long burnout without letting off cuz of the dam hop.