Bump steer in rwd daytonas
#631809
03/05/10 11:02 PM
03/05/10 11:02 PM
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Joined: Nov 2008
Posts: 35
Brantford On Canada
Rampage16v
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Brantford On Canada
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Hi finding I have alot of toe in change when the front wheels move throughout their travel. The tie rod ends on the dakota rack are about 2 inches longer then the lower control arms. Anyone got any pics of what the did to correct this. I was thinking of getting another set of minivan knuckles and machining off the arm going to the tie rod and making a new one 1.5 to 2 inches closer to the middle of the car to try and make the tie rods the same length as the lower control arms. Maybe bolt it to the lower wheel bearing bolts.
Dean Stillie
82 Rampage
2.4 litre turbo
[Email]10.14@138.02[/Email] mph
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Re: Bump steer in rwd daytonas
[Re: Rampage16v]
#631810
03/05/10 11:56 PM
03/05/10 11:56 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
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Master
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Posts: 52,972
Romeo MI
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Quote:
Hi finding I have alot of toe in change when the front wheels move throughout their travel. The tie rod ends on the dakota rack are about 2 inches longer then the lower control arms. Anyone got any pics of what the did to correct this. I was thinking of getting another set of minivan knuckles and machining off the arm going to the tie rod and making a new one 1.5 to 2 inches closer to the middle of the car to try and make the tie rods the same length as the lower control arms. Maybe bolt it to the lower wheel bearing bolts.
Get a shorter rack
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Re: Bump steer in rwd daytonas
[Re: Rodney]
#631813
03/06/10 11:46 AM
03/06/10 11:46 AM
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Joined: Apr 2006
Posts: 3,675
Akron, Ohio U.S.A.
roadhazard
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master
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Akron, Ohio U.S.A.
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Keep in mind if you use the Mopar Chassis Book for reference all of the data and graphs in there is for a "Rear Steer". If you have the rack out front you must convert the formula's for "Front Steer". Someone correct me if I am wrong 
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Re: Bump steer in rwd daytonas
[Re: roadhazard]
#631814
03/07/10 10:39 AM
03/07/10 10:39 AM
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Joined: Sep 2005
Posts: 2,442
LOWELL IN
QWK_ENUF
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LOWELL IN
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http://www.heidts.com/support_suspension_101.htmlhope this helps EXPLAINING BUMPSTEER Since the tie rod ends attach to the spindle steering arm, the tie rod controls the steering angle of the front wheels. If your car goes over a "bump" the spindle goes up and down in its swing radius, determined by the upper and lower arms . If the tie rod swings in a different radius than the spindle during this suspension travel; it will push or pull on the steering arm of the spindle, changing the direction of the front wheel, "steering" the car. And that is how the term and the monster "BUMP-STEER" were created, where 95% of the problems with incorrect suspension design are found. It is from people not really understanding this most important relationship between the tie rod length (not the overall rack length) and the spindle swing radius.They feel that if they are able somehow with enough modifications to the parts, to "physically assemble all the parts" that it must be OK. Then they pull down the driveway, over that first curb and low and behold: BUMPSTEER. When you drive a car with BUMPSTEER, the car tends to wander or hop around as you drive down the road over bumps and dips. You have to constantly steer the car to keep it in the lane. Not what you would call an enjoyable ride.
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Re: Bump steer in rwd daytonas
[Re: Rampage16v]
#631816
03/08/10 01:13 AM
03/08/10 01:13 AM
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Joined: Jan 2003
Posts: 1,490
smyrna,tn
draginmopars
pro stock
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pro stock
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smyrna,tn
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I used a pinto rack (narrowed) to the same width as the lower control arm pivot.
the inner tie rod makes the same arc as the lower control arm.
Ha-Ha Racin
Havin Fun 101
Howard
68 "Cummins" Satellite
70 W-2 449 "More Door" Dart
70 340 Dart Swinger, 4spd
71 360 Dart Swinger
72 540/ 518 Dart Swinger
73 airwolf 446/a-500 Cuda
73 "Cummins" Crew cab-car hauler
84 446 Dodge Rampage (tube chassis)
92 CTD 11' flat bed
92 CTD club cab
07 Dodge Caliber
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Re: Bump steer in rwd daytonas
[Re: dirt]
#631820
02/25/11 09:56 PM
02/25/11 09:56 PM
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Joined: Aug 2009
Posts: 2,046
Mooresburg, Tn
'72CudaRacer
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Mooresburg, Tn
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Quote:
here is what the tie rod looks like on my daytona. i dont have a MP kit but it is similar. i am using the one that we make so the rack may be located a little different not sure .
looked at some of the pictures you posted of the daytona. that will be pretty wild witha 4 cyl. judging by the rampage i am sure it will fly.
Please, do yourself a favor. You should put a flat washer between the head of the bolt and the rod end to prevent bolt pull through in case of a rod end failure. Thanks,
Brian Dunnigan
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Re: Bump steer in rwd daytonas
[Re: '72CudaRacer]
#631821
02/26/11 12:34 AM
02/26/11 12:34 AM
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Joined: Aug 2006
Posts: 1,349
warfordsburg, PA
dirt
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warfordsburg, PA
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that picture was taken while i was figuing out what i was doing. I have since used a washer there. I also found that the ackerman is much better if the locatian of the tie rod end is moved closer to the wheel. I have made an adapter to do that and also space the rod end down at the same time. i have pretty much eliminated bump steer problems.
you will probably end up with the rod end about 3/4 to 1" sopaced down from the factory mounting arm. I used the mustang bump steer kits on the daytonas and it worked fine. i had something i mocked up in the last picture that amounted to the same thing. drill a 5/8 hole through the spindle arm and use a 5/8 rod end with a sleeve , 5/8 threads on one end and 9/16 on the other , to match the rack tie rods . you will need the sleeve to make it reach the spindle.
it makes the tie rod longer than it should really be but its really not bad, you could probably get a extension if you wanted to get it perfect.
dont move the spindle tierod end mounts closer to the rack to shorten the tie rod your tires will squeel when you make a turn , the ackerman will be all screwed up. The tie rods should be shorter but thats not the major problem. moving the end closer to the wheel will actually make an inprovement, i know because thats what i eventually did on my car.
Last edited by dirt; 02/26/11 12:39 AM.
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Re: Bump steer in rwd daytonas
[Re: dirt]
#631822
08/26/11 07:44 PM
08/26/11 07:44 PM
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Joined: Nov 2008
Posts: 35
Brantford On Canada
Rampage16v
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Brantford On Canada
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Thanks for the reply. This is on the daytona, I have factory tierods underneath so far. I just have to find some rod ends that will thread onto the rack! Quote:
here is what the tie rod looks like on my daytona. i dont have a MP kit but it is similar. i am using the one that we make so the rack may be located a little different not sure .
looked at some of the pictures you posted of the daytona. that will be pretty wild witha 4 cyl. judging by the rampage i am sure it will fly.
Dean Stillie
82 Rampage
2.4 litre turbo
[Email]10.14@138.02[/Email] mph
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