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Wheel Hop ???
#1185509
02/24/12 05:09 PM
02/24/12 05:09 PM
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Joined: Jul 2004
Posts: 1,101
Retired now in Tennessee
Chi_Town_Runner
OP
super stock
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OP
super stock
Joined: Jul 2004
Posts: 1,101
Retired now in Tennessee
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I was going to post this on the race section but this is no race car so I thought I would try here first. I have completely rebuilt my suspension to stock specs on my 4-speed ’68 RR. I have replaced all front end bushings(complete with rubber) new torsion bars ( .96), new rear springs (Springs & Things 1” over) new bushings on the rear springs, and new shocks. Whenever I do an occasional hole shot I get wheel hop. I understand the problem but am looking for some direction. I don’t want to go with cal-tracks or traction bars. I believe my option is an adjustable pinion snubber. Here’s my question (finally). This car is not an everyday driver but an occasional driver to car shows so I want to maintain if for the street. How high should I adjust the snubber in order to maintain most of my suspension travel and reduce the wheel hop, or, what other option may I have? Thanks for any direction.  Frank
Remember - 2 wrongs don't make a right - but 3 rights make a left!
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Re: Wheel Hop ???
[Re: Chi_Town_Runner]
#1185511
02/24/12 06:16 PM
02/24/12 06:16 PM
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Joined: Dec 2004
Posts: 10,552
Rittman Ohio
fourgearsavoy
I Live Here
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I Live Here
Joined: Dec 2004
Posts: 10,552
Rittman Ohio
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Stiff rear shocks preferably with adjustable rebound  My car would actually get three wheels off the ground on the hit before I went to a better adjustable shock  My buddy has a picture of my car with both front wheels and the left rear tire about 2 inches off the ground on the rebound  Gus
64 Plymouth Savoy
493 Indy EZ's by Nick at Compu-Flow
5-Speed Richmond faceplate Liberty box
Dana 60
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Re: Wheel Hop ???
[Re: davenc]
#1185513
02/25/12 12:40 AM
02/25/12 12:40 AM
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Joined: Apr 2006
Posts: 3,675
Akron, Ohio U.S.A.
roadhazard
master
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master
Joined: Apr 2006
Posts: 3,675
Akron, Ohio U.S.A.
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I'd suggest clamping all the spring leaves in the front segment to the main leaf. Wheel hop is caused by the front spring segment bending into an "S" shape. When this happens the spring overloads the shock and can not control the spring. Also make sure the pinion snubber isn't touching the floor need at least 1.5" clearance if using one. Quality shocks are always a good idea. All that's on my car is leafs, QA-1 shocks and no snubber and she'll 60' high 1.38's - 1.40's footbraking. 
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Re: Wheel Hop ???
[Re: Locomotion]
#1185516
02/25/12 10:22 AM
02/25/12 10:22 AM
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Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
70Cuda383
Too Many Posts
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Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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I've always heard "just say no to a pinion snubber" they're the bandaid eqivilant to slapper bars and not that great.
good shocks, correct pinion angle, and clamp up the front section of the springs, while removing clamps from the rear is what I've always heard recommended.
I'll be doing that myself here pretty soon, my dakota will wheel hop pretty bad especially if there a tiny bit of moisture out. through first and second gear.
**Photobucket sucks**
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Re: Wheel Hop ???
[Re: 70Cuda383]
#1185517
02/25/12 11:22 AM
02/25/12 11:22 AM
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Joined: Apr 2006
Posts: 3,675
Akron, Ohio U.S.A.
roadhazard
master
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master
Joined: Apr 2006
Posts: 3,675
Akron, Ohio U.S.A.
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Well seeing as you have a decent set of shocks I'd start with the simple, cheap and easy stuff first. 1) Check to see if you have 1.5" of clearance between the pinion snubber and the body. If it's too close the car will tend to porpous. 2) Spring clamps are your friend  Clamp every leaf in the front segment to the main leaf. This makes the front of the leaf spring stiffer. This is the Mopar traction bar 3) If the above doesn't work try removing the pinion snubber and see what happens  4) If all the above fails check into some new shocks. Some adjustable Rancho's or QA-1 Stocker Stars. If 1 & 2 don't get you squared away I'd be suprised
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Re: Wheel Hop ???
[Re: roadhazard]
#1185518
02/25/12 11:25 AM
02/25/12 11:25 AM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
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2) Spring clamps are your friend Clamp every leaf in the front segment to the main leaf. This makes the front of the leaf spring stiffer.
This is the Mopar traction bar
This is what I have done a few times with wore out 318 cars and it eliminated the wheel hop completely without a snubber, worked great for me.
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Re: Wheel Hop ???
[Re: Chi_Town_Runner]
#1185520
02/25/12 03:38 PM
02/25/12 03:38 PM
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Joined: Mar 2007
Posts: 3,277
West Coast, USA
jbc426
master
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master
Joined: Mar 2007
Posts: 3,277
West Coast, USA
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Mopars typically don't wheel hop unless something is amiss. Chevy's are notoriously brutal wheel hoppers unless you run ladder bars or something.
A snubber should be touching the floor on a stick car, which is just too brutal on the ride quality to live with even for a short time.
(Although determining pinion angle is a confusing and contested subject)Check your pinion centerline angle in relation to the engine/transmission centerline angle. Let us know what it is. You can use a cheap magnetic angle finder available at most hardware stores. Remeber you are measuring the angle on the front of the rear end and on the rear of the engine/ trans, so be careful how you compare the angles in relation to each other to determin the pinions angle in relation to the angle of the engine trans/ centerline.
I bet it's off. You can use spring perch wedges to get it corrected up to a point. Then comes relocating your spring perches.
Correcting the pinion angle and clamping the front spring segments, and possibly removing some clamps from the rear segments should be all you need if you have some decent rear shocks.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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Re: Wheel Hop ???
[Re: jbc426]
#1185521
02/25/12 11:28 PM
02/25/12 11:28 PM
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Joined: Mar 2005
Posts: 862
Iowa State fan
kilroy
super stock
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super stock
Joined: Mar 2005
Posts: 862
Iowa State fan
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What are you guys using for spring clamps? Bolts and flat steel? Actual spring clamps? and from where.
1973 Charger, former SE, former auto
I'm not trying to be difficult, it comes naturally....
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Re: Wheel Hop ???
[Re: roadhazard]
#1185524
03/04/12 07:50 PM
03/04/12 07:50 PM
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Joined: Jul 2004
Posts: 1,101
Retired now in Tennessee
Chi_Town_Runner
OP
super stock
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OP
super stock
Joined: Jul 2004
Posts: 1,101
Retired now in Tennessee
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Hurray !!!!!!  I fabed up 4, 1/4" steel plates, two 1.5' wide and the other 2 were 2" wide with 2 - 7/16 bolts for each. These two clamps were used on the front sections of the leaf springs on each side (total of 4 clamps). No more wheel hop. Worked great and no slapper bars. Thanks again to all for the help. Frank
Remember - 2 wrongs don't make a right - but 3 rights make a left!
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Re: Wheel Hop ???
[Re: Chi_Town_Runner]
#1185525
03/04/12 11:10 PM
03/04/12 11:10 PM
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Joined: Jan 2005
Posts: 3,699
Newport, Mi
Evil Spirit
master
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master
Joined: Jan 2005
Posts: 3,699
Newport, Mi
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Glad the spring clamps worked for you - they usually do. Wheel hop is usually caused by the front of the spring wrapping up, or the deflection and rebound of the spring eye bushings. Shock absorbers can dampen the effect, but are not the cause of it. And pinion angle has nothing to do with it - it deals with driveshaft vibration and u-joint life and has nothing to do with wheel hop or traction.
Free advice and worth every penny...
Factory trained Slinky rewinder.........
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Re: Wheel Hop ???
[Re: Rick_Ehrenberg]
#1185527
03/05/12 02:32 AM
03/05/12 02:32 AM
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Joined: Nov 2003
Posts: 4,027
Dearborn Hts, MI
Sledge_57
master
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master
Joined: Nov 2003
Posts: 4,027
Dearborn Hts, MI
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I know he found his answer but I'll throw one more out there to consider. Wheel balance....
When I bought my Coronet the wheel hop was terrible, I tried a snubber etc..
Eventually went to Cal Tracs and when I did I also changed to the steel rear wheels and Drag Radials I now have.
No more wheel hop, I assumed it was the Cal Tracs until I had to put my Torque Thrusts and BFG's back on for a week or so.
Oh look, the wheel hop is back, my wheels were balanced or so I thought.
Took it in had those tires/wheels rebalanced and wheel hop was gone.
Doug
1967 "Pedal Car" 500" low deck , TF 727, 4.30 Locker
Best to Date: 11.67 @ 114.9 1.64 60ft
"Kids in cars cause accidents. Accidents in cars cause kids..."
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Re: Wheel Hop ???
[Re: Chi_Town_Runner]
#1185528
03/05/12 02:53 AM
03/05/12 02:53 AM
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Joined: Jun 2011
Posts: 1,039
ALBERTA CANADA
CUDA8U
super stock
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super stock
Joined: Jun 2011
Posts: 1,039
ALBERTA CANADA
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Quote:
Hurray !!!!!!
I fabed up 4, 1/4" steel plates, two 1.5' wide and the other 2 were 2" wide with 2 - 7/16 bolts for each. These two clamps were used on the front sections of the leaf springs on each side (total of 4 clamps).
No more wheel hop.
Worked great and no slapper bars.
can you post pics?
Thanks again to all for the help.
Frank
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