1-2 shift - why wheelhopping?

[AJ]

ok, so after some time behind the wheel of my viper i feel fairly comfortable with its oversteer characteristics (very predictable brakeaway and easily controlled once going); however, i have been having one stupid problem i dont seem to be able to get rid of- a severe 1-2 shift wheel hop. i tried experimenting with different shifting techniques, but what i am finding is that regardless of shifting (as long as it is aggressive), tire temp and tarmac condition i get really bad hop...

how can i remedy this? rear camber adjustment?

thanx in advance

alex
02 gts
few other cars

 

[GTS Dean]

Tire pressure adjustment and you need more rear toe-in.

 

[AJ]

hm.. i thought more camber for some reason...

how much toe-in should i dial for the street? assuming i would like to keep my rears at least 7500 or so miles...

alex
02 gts
few other cars

 

[USAF BAD ASP]

I am having the same problem. I found tire pressure helps me none. I think different tires are the solution. I'm thinking of the new kumho's..

 

[toddt]

To add one more datapoint--I went to new pilot sports at 40psi all around.

Wheelhop has completely disappeared.

I don't expect it to last, however. On my worn pilot sports wheelhop got to be a fact of life.

 

[GONABITE]

Well as far as the Kumhos go they are an awesome tire and at first no wheel hop but it is back again if this is an alingment issue I would like to know it would be great to remedy this problem.

 

[Hoosier Daddy]

I've never experienced wheel hop, maybe you guys might want to check your frames.

 

[MES]

I added HD half shafts and get nearly zero wheel hop now. I guess it's the extra weight on the suspension that has reduced it. Tires & air pressure don't make any difference (at least for mine) had MMX3 then sports now Kumhos and they all did it.

 

[viper spray]

Kuhmo tires stopped my hop problems.

 

[Chuck 98 RT/10]

If anything, get off the gas. As you probably know, wheel hop is very ******* the suspension. Go 3/4 throttle when you shift into 2nd and let the tires hook before mashing the peddle. Takes discipline to keep the foot from going full don't it?

Todd, 40 psi all the way around may have eliminated the hop but it also will hurt 1/4 times.

 

[Kurt 97 GTS]

I had problems with wheelhop on my 94 RT with 12000 miles mxx3's. My 97 has new pilot sports and this is not an issue!!

 

[GTS Dean]

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by AJ:
hm.. i thought more camber for some reason...

<HR></BLOCKQUOTE>

For straight line acceleration, you want the rear tires absolutely perpendicular to the road surface under weight transfer. You would therefore probably want LESS camber - like zero to +0.1 degrees. This will negatively impact your cornering ability.

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>how much toe-in should i dial for the street? assuming i would like to keep my rears at least 7500 or so miles...

<HR></BLOCKQUOTE>

Toe-in affects tire wear much less than camber. More rear toe-in makes the car less twitchy and oversteer prone. I run 5/16" (or more) total.

 

[GaryA]

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Chuck 98 RT/10:
wheel hop is very ******* the suspension.
<HR></BLOCKQUOTE>

Don't you mean wheel hop is ******* the drivetrain (half shafts/driveshaft/transmission)? I wouldn't think the suspension really cares much about wheel hop.

Just as another datapoint on this. I asked Sean Roe about wheel hop and he suggested going with the Delrin bushings (which I plan to do). The idea is that the rubber bushings supplied with the car "bind" and release the energy at once causing the wheel hop. I'm definitely not an expert, but I've been seeking a solution to this same problem for awhile. I'll report back once I get the new bushings installed.

 

[Chuck 98 RT/10]

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by GaryA:
Don't you mean wheel hop is ******* the drivetrain (half shafts/driveshaft/transmission)? I wouldn't think the suspension really cares much about wheel hop.

<HR></BLOCKQUOTE>

Yes

 

[AJ]

very informative.

in the mean time i experimented with tire pressure and found that going softer actually increases hop while going 35 psi+ reduces it somehow. that is inline with the theory that less spongy rearend = less wheel hop. maybe the bushings are the answer- i will install them and report back in this thread.

hd halfshafts should not have so much of an increased weight as to make a difference... somehow i dont think this is related.

when i said "street driving" i mean the overall package- not just straight-line accelleration. i am a fairly aggressive driver and i do corner at higher speeds so handling is important. therefore more camber suits me fairly well- that is why i asked- i was hoping to kill 2 rabbits with one stone

i will experiment with the toe-in too and will report here.

thanx for the answers

alex
02 gts
few other cars