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420A Correcting Wheel Hop

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BLACK'98DSM

5+ Year Contributor
4,451
1,889
Feb 9, 2019
Alabama
So I swapped over to an LSD recently to fix the traction issues. It helped a ton, but now I have a new issue. When the car loses traction on the front end, I get a very violent "wheel hop". And I do mean violent. The whole car shakes and rattles for a second before it grips. This is rough on everything I'm sure. What do you guys recommend to fix this? Launching at a lower rpm sucks because I have no torque. If I could fix this issue I'd be sitting pretty good.
 
Stiffen up the rear suspension, get softer compound tires up front. What rpm are you launching at?
Rear springs are stiff as hell... I definitely need the new tires put on though. I usually launch at 2500rpm. Anything higher and it won't grip. Anything less and it stumbles off the line.
 
Rear springs are stiff as hell... I definitely need the new tires put on though. I usually launch at 2500rpm. Anything higher and it won't grip. Anything less and it stumbles off the line.
You need adjustable shocks in the rear. Launch higher and slip clutch more. My fwd street car I would launch at 3800 on pretty soft tires and cut 2.0 60’s. Requires a good amt of clutch slip tho
 
You need adjustable shocks in the rear. Launch higher and slip clutch more. My fwd street car I would launch at 3800 on pretty soft tires and cut 2.0 60’s. Requires a good amt of clutch slip tho
The ass end doesn't seem to squat down much. More of the front end instantly getting jumpy. Only started after LSD install, before one of the tires would just roast before I started moving.
The shocks are worth a try though. It'd be a fun experience changing them and seeing the results.
 
Current tires are 215's with treadwear 450. Tires I have waiting in the garage are 225's with treadwear 380.
I hate to say this but neither tire sounds performance oriented. I've bought at least a dozen varieties and aside from dedicated race tires, for my street car I broke down and bought Michelin pilot sport. They've been the best tires I've owned. Others have come close and were definitely high performance. The trade off is tread wear. The stickiest tire I ever had was a Yokohama avs intermediate. Bald in 9000 miles. FUN 9k.
 
So I swapped over to an LSD recently to fix the traction issues. It helped a ton, but now I have a new issue. When the car loses traction on the front end, I get a very violent "wheel hop". And I do mean violent. The whole car shakes and rattles for a second before it grips. This is rough on everything I'm sure. What do you guys recommend to fix this? Launching at a lower rpm sucks because I have no torque. If I could fix this issue I'd be sitting pretty good.
Check out this thread in the Drag Race section... https://www.dsmtuners.com/threads/hitmaster-system-clutch-hit-controller-feedback.535576/

With a clutch hit controller controlling clutch engagement during launch, you will be able to launch with as much rpm as you need to make power, and then get that power to the ground smoothly without bogging . Far less likely to break parts. Teams at the top of the AWD drag racing world are using the Hitmaster during launch.

Grant
 
What engine mounts are you on. Those being stiffer will play a massive role in wheel hop and stop the engine rotating causing this. My daily has wheel hop problems so to solve this i made a torque mount for the gearbox. Similer to our front and rear roll stops! Best way to help our cars
 
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What front suspension is on the car as far as shocks and springs go? How old are they?

Have you replaced any bushings?

Most of wheel hop is poorly damped shocks and overly compliant bushings oscillating in an uncontrolled manner. Wheel hop is very bad for the drivetrain as it loads and unloads everything very quickly (think launching your car 20 times very quickly). It's best to get this sorted or refrain from launching if you care about longevity.
 
Front struts are Koni yellows, only about 2 years old. Springs are Eibach, I think Ground Control? All the front bushings have been replaced at some point, a few are polyurethane.

Nothing on the car in terms of drivetrain or suspension is original. Everything is replaced or upgraded.
 
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My daily had bad wheel hop, i made a stiff engine / gearbox torque mount and its got rid of 90% of it now, So the gearbox/engine twisting is a huge cause of it even though the above says otherwise. Im on the same shocks and springs as before also so i can compare the 2 results and its much much nicer now. The can can accelerate once again without bouncing around LOL.

The 2G dsm will still have some built in due to the compression arm gap as its designed to take the forwards and back movements plus it uses that gap to pivot due to the suspension setup. I think closing it would help but unless its closed fully you will still get wheel hop on the 2G at least.
 
I wonder if you would still get wheel hop if you ran blizzaks on the front.
 
The new tires helped a bit. I still experience wheel hop, but it's not nearly as aggressive as before. Instead of feeling like the whole thing is falling apart I just feel shaking in the steering wheel.

Front struts are Koni yellows, only about 2 years old. Springs are Eibach, I think Ground Control? All the front bushings have been replaced at some point, a few are polyurethane.

Nothing on the car in terms of drivetrain or suspension is original. Everything is replaced or upgraded.
I am fwd. I also run koni yellows with tein springs in front. In the rear, koni yellow with Ebiech springs. My subframe mounts are solid. All suspension is spherical arms with poly bushing all around with the exception of upper control arm and shock bushing. My tires I run are toyo r888 in the front and Falken azenis in the rear. 10psi launch and I barley spin. I had to look at a log to see the spin. I even forgot to lower tire pressure at the track. The toyo r888 are a great tire but wont last long if daily driven. I tried the falkens up front and did not like them at all. They might of done better with lower tire pressure. I also have bridgestone re71r that I have yet to try but upon reading, they get a better review than my toyos. Your front suspension, you could make the rebound slower. That way they can absorb more.

Not sure if this was helpful, but wanted to provide my experience since I been playing with this recently.
 
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