wheel hop - Chevelle Tech
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post #1 of 32 (permalink) Old Apr 12th, 04, 8:33 AM Thread Starter
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Can someone help me out here. what exactly causes wheel hop. (vs. just spinning and not hopping) I have alot of wheel hop on my 71. Will wider tires help this. I really don't want to get into traction bars, etc. because I want to keep a stock look. I did a search here and really didn't see this issue addressed at length. (which surprised me)

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post #2 of 32 (permalink) Old Apr 12th, 04, 8:46 AM
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if you don't want to get into traction bars and such. put a good set of rear shocks on the car such as monroe sensatrac. then install solid alumiunum bushings in the lower rear control arms, they will have grease zerks for lubing the pivot. this is how my 68 is set up with a 4:10 gearing 12 bolt posi, there may be other suggestions.

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post #3 of 32 (permalink) Old Apr 12th, 04, 9:04 AM
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Quote:
Originally posted by freshayr:
Can someone help me out here. what exactly causes wheel hop.
One of the most common causes for wheel hop is a car with a raised suspension (tall springs in the rear) or sloppy bushings in the rear trailing arms. Any combo of these conditions may start wheel hop. A cure, which is easy to do, can be found in the installation of Lakewood or Edelbrock "No-hop" bars. These are not like the "ladder bars" of years ago. Ladder bars will result in a harsh ride, but do cure the wheel hop. No-Hop bars install on the rear axle housing and re-locate the upper, rear control arm mounting point in a position that is higher & forward from stock. This results in moving your pinion angle upward, changing the instant center of your car. They're easily installed and are not visible unless you're laying on the ground. I installed a set of Edelbrock's on my '72 SS and all wheel hop went away. Traction is another story....

Gregg Haskin
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post #4 of 32 (permalink) Old Apr 12th, 04, 9:21 AM
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We had exactly the same problem as you did with our 71. We ordered AC Delco shocks through Ground Up and all new rear bushings (the stock rubber ones) and new upper control arms (all gotten through Ground Up)and new springs, which corrected the pinion angle (which is a cause of wheel hop) and helped with the weight transfer.

Rigt after that was done, she hooked like she has never hooked before . All wheel hop was gone, and she just squatted and ran.

Hope this helps, and good luck with your ride.
Chris

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post #5 of 32 (permalink) Old Apr 12th, 04, 9:28 AM Thread Starter
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Quote:
Originally posted by RedSS454:
she just squatted and ran.

Oh baby, now you are making the hair on the back of my neck stand up! [img]smile.gif[/img]
What exactly is the pinion angle. I assume that has to do with the angle that the driveshaft comes into the rear?????

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post #6 of 32 (permalink) Old Apr 12th, 04, 10:09 AM
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My 70SS also developed wheel hop. I rebuilt the rearend with polly bushings, stock springs etc. No more wheel hop.
This is a street driven car with standard size tires

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post #7 of 32 (permalink) Old Apr 12th, 04, 10:14 AM
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Do you have air shocks? I've found that if my shocks are too high (too much air in them) I wheel hop like crazy. but... When the car sits level or only a little higher in the rear the wheel hop turns into a nice smooth spin. Also helps traction

Andrew McMullen
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post #8 of 32 (permalink) Old Apr 12th, 04, 10:21 AM Thread Starter
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Quote:
Originally posted by marilynSS396:
Do you have air shocks? I've found that if my shocks are too high (too much air in them) I wheel hop like crazy. but... When the car sits level or only a little higher in the rear the wheel hop turns into a nice smooth spin. Also helps traction
yes I have air shocks.....they are very old and probably could stand to be replaced.

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post #9 of 32 (permalink) Old Apr 12th, 04, 10:32 AM
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I installed Southside Machine bars (Jeg's sells them now) on my 4 speed 70 SS396 and they cured my wheelhop problems.Factory swaybar hooked right up,and they looked very,very stealth.Just an FYI,my car had stock springs,Monroe shocks and newer rubber bushings before the SSM bars,and I had violent wheelhop.
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post #10 of 32 (permalink) Old Apr 12th, 04, 10:45 AM Thread Starter
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Quote:
Originally posted by mr 4 speed:
I installed Southside Machine bars (Jeg's sells them now)
do you have a part number for them??? I tried a Jegs search for SSM bars, etc. and couldn't find them. thanks

71 SS 454 M22,
71 SS 454 M22 project car
68 Barracuda fastback 340 727
Newest addition 68 Coronet R/T Convertible
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post #12 of 32 (permalink) Old Apr 12th, 04, 11:49 AM
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Quote:
Originally posted by freshayr:
</font><blockquote>quote:</font><hr />Originally posted by RedSS454:
she just squatted and ran.

Oh baby, now you are making the hair on the back of my neck stand up! [img]smile.gif[/img]
What exactly is the pinion angle. I assume that has to do with the angle that the driveshaft comes into the rear?????
</font>[/QUOTE]You got it. The pinion angle is the angle in which the driveshaft runs into the rear. If it is too high (as ours was because we had wagon/elco springs from a previous owner )the angle is off, and causes wheel hop. With air shocks, this is usually the case. Does your rear sit higher or lower than a stock chevelle appears? Than this might be your problem. Try and replace them with normal shocks and and stock springs, and you might be able to solve your problem, at the same time giving you a nice smooth ride [img]smile.gif[/img] .
Good Luck [img]graemlins/thumbsup.gif[/img]
Chris

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post #13 of 32 (permalink) Old Apr 12th, 04, 12:07 PM
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My 65 ragtop would hop so bad, I spun the axle shaft an 1/8 of a turn in the housing. I opted to install a set of ladder bars, never looked back. Really nice addition to the 4/11 posi... [img]graemlins/thumbsup.gif[/img]

No, he didn't slam into you, he didn't bump you, he didn't nudge you, he "rubbed" you. And rubbing, son, is racing.
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post #14 of 32 (permalink) Old Apr 12th, 04, 12:09 PM
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My pinion angle is set at -4deg. Which BTW is also a good starting point.No hopping ,just putting the wheels right were they should be

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post #15 of 32 (permalink) Old Apr 12th, 04, 12:20 PM
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Onebad66 (Steve), I like the picture of your '66. I see you have it listed as a 383. If I wanted my wheels in the air too ( ), could I accomplish with about $3,500...or at least build a decent street machine. And would you stick with a stroker?

No, he didn't slam into you, he didn't bump you, he didn't nudge you, he "rubbed" you. And rubbing, son, is racing.
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