IRS wheel hop
05-25-2006, 11:41 PM
#1
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IRS wheel hop hey guys, im almost positive that this is a re-post so im sorry in advance. I've had my car for almost 3 months and im really sick of the wheel hop. is there some package that eliminates the wheel hop, or just a part or series of parts that will eliminate this problem?
05-26-2006, 01:46 AM
#3
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Auto or 6sp?
Autos for the most part get no wheelhop.
I have yet to get any hop and I have made over 50 dragtrack passes.
six speeds are another story,,they love the ole hip-hop..
You can try stiffer springs from Pedders, the BMR dragbags, the Harrop irs mount, one piece driveshaft and see what happens..
Autos for the most part get no wheelhop.
I have yet to get any hop and I have made over 50 dragtrack passes.
six speeds are another story,,they love the ole hip-hop..
You can try stiffer springs from Pedders, the BMR dragbags, the Harrop irs mount, one piece driveshaft and see what happens..
05-26-2006, 03:39 AM
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There are also, the poly urathane cross member bushings, SLP/Hotchkis sway bar with poly end link bushings. . . Urathane diff. mount bushing (noltech) ?sp
BMR drag bags make the most noticable decrease in wheel hop so far for me! But I already had all other parts in my sig. So it could be a combination effect.
Some say that better tires (Drag radials) help a lot too!
my $.02
BMR drag bags make the most noticable decrease in wheel hop so far for me! But I already had all other parts in my sig. So it could be a combination effect.
Some say that better tires (Drag radials) help a lot too!
my $.02
05-26-2006, 08:16 AM
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The front bushings and drag bags did nothing for me,
I have noticed that you can move the center section of the drive shaft up and down about 2 inches. This is most likely a major part of the wheel hop.
One Piece drive shaft
Pedders Bushing kit,
Pedders Shocks,
Pedders Springs,
Should take care of most of it, (Might want to hold off on the drive shaft though, they are super expensive, and the other things may take care of it for you.)
I have noticed that you can move the center section of the drive shaft up and down about 2 inches. This is most likely a major part of the wheel hop.
One Piece drive shaft
Pedders Bushing kit,
Pedders Shocks,
Pedders Springs,
Should take care of most of it, (Might want to hold off on the drive shaft though, they are super expensive, and the other things may take care of it for you.)
05-26-2006, 01:46 PM
#7
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also if you like high speed racing/driving ALL the one piece driveshafts on the six sppeds vibrate at over 100mph.
Basically if your into drag racing and didnt get the auto your in for an uphill battle.
Basically if your into drag racing and didnt get the auto your in for an uphill battle.
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05-29-2006, 02:43 PM
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i've got a M6. i dont recall if the hotchkis swaybars came with the upgraded bushings or not but i have the sway bars and whatever came with them. where can i find all of this Pedders stuff? so if i got shocks, and the bushing kit (assuming i dont have new bushings with the sway bars), harrop cover, BMR drag bags, and urathane differential mount bushings. do the pedders springs lower the car at all? or are they just stiffening springs? thanks for all the help guys!
05-29-2006, 11:29 PM
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'06 M6 here ...
koni in the rear helped me tremendously ... not gonna have to do anything else until more power or something else changes ... I went that route because I felt running 23# in the rear stock tires was hurting trap speeds ... but @ 23# on stock 17" BFG KDWS I never got hop unless I tried to launch over 2500RPM ...
GL .. Darin
koni in the rear helped me tremendously ... not gonna have to do anything else until more power or something else changes ... I went that route because I felt running 23# in the rear stock tires was hurting trap speeds ... but @ 23# on stock 17" BFG KDWS I never got hop unless I tried to launch over 2500RPM ...
GL .. Darin
06-09-2006, 12:08 PM
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My wheel hop seemed to go away this weekend - after adding the Noltec Differential Insert 3 weeks ago.
Car is an 04/A4 - with major hop problems at ETown - even with X member bushings & rear Koni shocks & street tires set at 30 psi.
Even power braked it a little up to 1200RPMs with no problems (exept for 1st run when the track was still wet - that was interesting)
Car is an 04/A4 - with major hop problems at ETown - even with X member bushings & rear Koni shocks & street tires set at 30 psi.
Even power braked it a little up to 1200RPMs with no problems (exept for 1st run when the track was still wet - that was interesting)
06-21-2006, 10:09 PM
#11
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Originally Posted by GTO Nation
The front bushings and drag bags did nothing for me,
I have noticed that you can move the center section of the drive shaft up and down about 2 inches. This is most likely a major part of the wheel hop.
One Piece drive shaft
Pedders Bushing kit,
Pedders Shocks,
Pedders Springs,
Should take care of most of it, (Might want to hold off on the drive shaft though, they are super expensive, and the other things may take care of it for you.)
I have noticed that you can move the center section of the drive shaft up and down about 2 inches. This is most likely a major part of the wheel hop.
One Piece drive shaft
Pedders Bushing kit,
Pedders Shocks,
Pedders Springs,
Should take care of most of it, (Might want to hold off on the drive shaft though, they are super expensive, and the other things may take care of it for you.)
06-21-2006, 10:31 PM
#12
Irs
Originally Posted by A-man930
Man! Too many conflicting opinions! I guess that's just what happens when you're on a board like this. What exactly is the root cause of IRS wheelhop? What are the inherent weaknesses in the GTOs setup?
Honestly lets take an intelligent approach and figure this **** out. Is it a geometry? or what? Champ cars with 900 hp have IRS and I don't see them hopping there tires as they leave the pits??? What are we missing here, besides a 2 million dollar car :-0
Just a thought
UofMn
06-21-2006, 11:41 PM
#13
All you have to do is stall up an a-4 to see where we get wheelhop. When torque is applied to the suspension, it squats. That brings the tire up. When the tire goes up, traction diminishes, then it spins. When it spins, the suspension unloads, and relieves the squat. The tire makes good contact again, and the suspension sqats again . etc., etc, etc, et all. The only solution with the factory suspension seems to be firming it up, which reduces weight transfer. All of this adds up to a great road car that sucks *** at the drag strip. I have drag bags, koni adjustables, and nittos, and my 60' times still suck. I either hop or spin.
06-23-2006, 01:16 PM
#14
I thought when a car squats it will add traction since you are transfering weight to the back? I understand that there would be some loss of traction before it stops squatting but you would have more traction in the "squatted" position.
UofMn
UofMn
06-23-2006, 09:59 PM
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Originally Posted by UofMN
I thought when a car squats it will add traction since you are transfering weight to the back? I understand that there would be some loss of traction before it stops squatting but you would have more traction in the "squatted" position.
UofMn
UofMn
-K
06-28-2006, 07:34 PM
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Ok, it seems like BMR has quite a handle on the whole wheelhop issue, seeing as they've built-up a solid 9 second '04. The drag bags seem like a band-aid to me, and they're only for stock springs to boot. The Harrop rear cradle bushings look to be good for something. Upgraded shocks (konis in this case) are always helpfull. The Harrop diff cover looks like a solid piece too. The Pedders stuff I wasn't able to pull up, but to the performance-oriented crowd, a little harsher ride from stiffer springs is ok. What about BMR's subframe connectors? Is there any need?
What this all adds up to is good advertising by BMR
What this all adds up to is good advertising by BMR
07-01-2006, 10:21 AM
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Originally Posted by gametech
. I have drag bags, koni adjustables, and nittos, and my 60' times still suck. I either hop or spin.
The car performs well once you learn how to launch and use the right tools.
You can see my best 60 in my sig and I avg low 1.6's and mid 1.5's
I have stock DS, 1/2 shafts, stubs, diff, bushings etc.......I've done nothing other than the above mods for suspension stuff.
07-01-2006, 10:24 AM
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Originally Posted by A-man930
The drag bags seem like a band-aid to me, and they're only for stock springs to boot. T