Wheel hop

[Todd15Fastback]

I would think the opposite. No? Colder the pavement = less traction, which should mean less wheel hop.

Not for me...when it is warm outside, I can accelerate with out hop. Just like catching 2nd in warm weather, no hop.

Cold weather, hops like a crazy rabbit. My 03 Cobra behaved the same way with its IRS.

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[foghat]

I feel like this issue is being blown up due to the fact that everyone is getting their car in the dead of winter and half of us are running the PP summer tires. But I do get some wheel hop with my all seasons

But in the case of winter and summer tires, wouldn't one expect wheel hop to be less? Less traction, less hop, no?

I am not understanding the comments implying wheel hop is more prevalent in colder temperatures where traction is less. Someone please explain.

 

[Jotis73]

I have thee PP and I get the hell out of wheel hop. LC is unuseable, I've been praying it's due to cold weather. We shall see.

 

[Todd15Fastback]

But in the case of winter and summer tires, wouldn't one expect wheel hope to be less? Less traction, less hop, no?

I am not understanding the comments implying wheel hop is more prevalent in colder temperatures where traction is less. Someone please explain.

Here is something I borrowed from Fulltile Boogie Racing on the 03-04 Cobras and their IRS.

Cobra owners have been disappointed and also feel let down by Ford regarding the Cobra Independent Rear Suspension assembly. The IRS has also been a downright mystery for some owners. There are numerous reasons why some cars wheel-hop worse than others and there are several cures that can mask wheel hop to varying degrees. Wheel hop can and will cause serious damage to your IRS assembly. Snapped halfshafts, leaking rear covers and cracked or blown rear covers are the most common of failures. The biggest offender is all of the rubber in the differential mounts, control arm bushings and the subframe bushings. These soft compliant rubber bushings were originally installed in the IRS so they could deliver a nice soft ride that was free of Noise Vibration and Harshness, which will simply be known from this point forward as NVH. A secondary reason for wheel hop is rubber compound (durometer) and sidewall stiffness of a hard street tire. The drive tires oscillate between traction and slip when it hops. Additionally, the suspension rubber compresses, then rebounds and repeats. If you remove the "give" found in the OEM suspension rubber or aftermarket poly bushings, it can no longer do that. Some tires, depending on compound and sidewall stiffness, can increase or decrease hop to a certain extent. For instance, a Good-Year Eagle F1 will wheel hop on almost any car especially in cold weather. For the smooth application of power, you need a rigid structure (stiffer chassis and IRS assembly) and tires that have a soft enough compound to grip with a sidewall that will absorb some of the 'shock' of a launch. Chassis flex is also a contributing factor to wheel hop.

 

[foghat]

Here is something I borrowed from Fulltile Boogie Racing on the 03-04 Cobras and their IRS.

Cobra owners have been disappointed and also feel let down by Ford regarding the Cobra Independent Rear Suspension assembly. The IRS has also been a downright mystery for some owners. There are numerous reasons why some cars wheel-hop worse than others and there are several cures that can mask wheel hop to varying degrees. Wheel hop can and will cause serious damage to your IRS assembly. Snapped halfshafts, leaking rear covers and cracked or blown rear covers are the most common of failures. The biggest offender is all of the rubber in the differential mounts, control arm bushings and the subframe bushings. These soft compliant rubber bushings were originally installed in the IRS so they could deliver a nice soft ride that was free of Noise Vibration and Harshness, which will simply be known from this point forward as NVH. A secondary reason for wheel hop is rubber compound (durometer) and sidewall stiffness of a hard street tire. The drive tires oscillate between traction and slip when it hops. Additionally, the suspension rubber compresses, then rebounds and repeats. If you remove the "give" found in the OEM suspension rubber or aftermarket poly bushings, it can no longer do that. Some tires, depending on compound and sidewall stiffness, can increase or decrease hop to a certain extent. For instance, a Good-Year Eagle F1 will wheel hop on almost any car especially in cold weather. For the smooth application of power, you need a rigid structure (stiffer chassis and IRS assembly) and tires that have a soft enough compound to grip with a sidewall that will absorb some of the 'shock' of a launch. Chassis flex is also a contributing factor to wheel hop.

Thanks. Interesting about the sidewall stiffness.

 

[Hack]

But in the case of winter and summer tires, wouldn't one expect wheel hop to be less? Less traction, less hop, no?

I am not understanding the comments implying wheel hop is more prevalent in colder temperatures where traction is less. Someone please explain.

I can tell you that if the wheels don't slip on the pavement at all you will not have wheel hop. So when you have great traction and/or aren't accelerating all-out you will not have the wheel hop.

If you have really good traction and you accelerate hard enough to make the tires slip anyway the wheel hop becomes more violent and more likely to break parts.

 

[BMR Tech]

We are working on our wheel hop development videos right now.

We test one part at a time, then test. Test more, and more. Our PP model has very violent wheel hop. Not only are the under car videos awesome, and show the wheel hop...but they also show weaknesses in other areas.

 

[Merle]

I have thee PP and I get the hell out of wheel hop. LC is unuseable, I've been praying it's due to cold weather. We shall see.

I WILL TAKE THE LOG REAR END EVERYTIME. THE RIDE IS A LITTLE
HARDER BUT MY 71 YEAR OLD ASS CAN TAKE IT. FORD HAD MOSTLY
PERFECTED THE GRIP AND STABILITY BY 2014. I KNOW THE CURVES
ON A CURVY RACE TRACK WILL CHALLENGE THE LOG REAR, BUT NOT
VERY MANY LOG OWNERS WILL EVER BE ON A CURVY ROAD COURSE.
THANK YOU.

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