Re: Replaced a Posi with a spool now the car moves around
[Re: Jacob Pitt]
#1926866
10/06/15 09:16 AM
10/06/15 09:16 AM
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Joined: Feb 2005
Posts: 2,528 Mansfield, Tx
Jacob Pitt
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I have a feeling it's in the rear somewhere especially since I rebuilt the whole frontend and it didn't change anything about how the car handled. I will check the front spring bushings because I believe they were rubber when I installed the springs years ago, and will also check to see if the rearend is square. I will also roll the tires and check them. I will keep you guys updated on what I find.
2013 NHRA D4 Stock Champ #4 in the World IHRA Stock 2x IHRA Div.4 Stock Champ 14x Track Champ All using a Ultimate Converter Concepts converter. Call Lenny today 704-892-6837
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Re: Replaced a Posi with a spool now the car moves around
[Re: Jacob Pitt]
#1927043
10/06/15 02:25 PM
10/06/15 02:25 PM
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Joined: Feb 2003
Posts: 12,675 Columbia, CT
moper
I Live Here
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I Live Here
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Assuming the springs, shocks, and bushings are good I vote for bent housing or axle misaligned in the chassis. The 'grip will help smooth out differring amounts of grip. The spool will just ensure the car gets pushed around.
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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Re: Replaced a Posi with a spool now the car moves around
[Re: Jacob Pitt]
#1927257
10/06/15 08:03 PM
10/06/15 08:03 PM
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Joined: Dec 2006
Posts: 2,137 Byron, NY
W.I.N. Racing
top fuel
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top fuel
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Byron, NY
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Does the car feel like its moving by the seat of your pants or steering wheel correction??
'01 P1500, Blown/Inj BAE,/Veney ,Bruno/CS2,Dana 60 '01 Dodge 3500 S Cummins Auto, Fresh air kit, 4" Exhaust, '05 Dodge Magnum R/T - Too Much to list '60 Willys CJ5 '01 International LPX - Project,DT466, Allison '64 Plymouth Valiant, Inj 528 Hemi, 2spd
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Re: Replaced a Posi with a spool now the car moves around
[Re: Jacob Pitt]
#1927581
10/07/15 10:31 AM
10/07/15 10:31 AM
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Joined: Feb 2005
Posts: 2,528 Mansfield, Tx
Jacob Pitt
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No pinion snubber. The car requires steering input all the way down the track. It felt this way when we first bought the car many years ago where it would sway back and fourth requiring a lot of steering input. I was able to eliminate the problem when I put it on a alignment rack and saw it had negative caster in the frontend. It now has a good amount of caster but has started swaying again but is more controllable this time around. My mom is 65 years old and races for the fun of it. The car run 6.80-90's with a pump gas small block in it and she doesn't feel very comfortable in the car with it moving around so much.
2013 NHRA D4 Stock Champ #4 in the World IHRA Stock 2x IHRA Div.4 Stock Champ 14x Track Champ All using a Ultimate Converter Concepts converter. Call Lenny today 704-892-6837
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Re: Replaced a Posi with a spool now the car moves around
[Re: Jacob Pitt]
#1927724
10/07/15 02:12 PM
10/07/15 02:12 PM
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Joined: Feb 2003
Posts: 12,675 Columbia, CT
moper
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I Live Here
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Columbia, CT
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Given the history and steerring input needed I would think it's not the tires. I've driven cars that move around (I call it wallowing) but you shouldn't have to go crazy driving it to keep it going straight even if the sidewalls move around a little.
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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Re: Replaced a Posi with a spool now the car moves around
[Re: Jacob Pitt]
#1927729
10/07/15 02:19 PM
10/07/15 02:19 PM
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Joined: Nov 2004
Posts: 6,890 North Alabama
Monte_Smith
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No pinion snubber. The car requires steering input all the way down the track. It felt this way when we first bought the car many years ago where it would sway back and fourth requiring a lot of steering input. I was able to eliminate the problem when I put it on a alignment rack and saw it had negative caster in the frontend. It now has a good amount of caster but has started swaying again but is more controllable this time around. My mom is 65 years old and races for the fun of it. The car run 6.80-90's with a pump gas small block in it and she doesn't feel very comfortable in the car with it moving around so much. I think this steering input is PART of the problem. Some cars with slicks, especially smaller ones, tend to sashay a bit going down the track. If you are trying to correct every little wiggle with steering input, you are simply compounding the issue and soon the sashay will be bad. I run into this often with guys who are used to drag radials and bolt on bias tires for a race at a bad track. The radials drive SO good, that on slicks they tend to try and control the car TOO much. Once I tell them to just keep the wheel straight and let the car just go down the track...the ill handling usually goes away
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Re: Replaced a Posi with a spool now the car moves around
[Re: Jacob Pitt]
#1927745
10/07/15 02:50 PM
10/07/15 02:50 PM
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Joined: Aug 2003
Posts: 43,744 Bend,OR USA
Cab_Burge
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Bend,OR USA
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My old pump gas Duster had a 8 3/4 that was bending while I raced and drove it, it would wonder on the street with mix type tires, bias in the front with radials in the back and do the same with radials in the front and bias in the back It wouldn't wonder as much on the street with the same type tires front and back but it would go straight at the tracks with either combination, both 1/8 and 1/4 with mixed type of tires I ended up finding a worn idler arm, it had been replaced when I first assemlbed the car and it had less than 3000 miles total on it whe I replaced it the second time, that straighten all the problems out after that
Last edited by Cab_Burge; 10/08/15 10:10 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Replaced a Posi with a spool now the car moves around
[Re: Jacob Pitt]
#1927763
10/07/15 03:21 PM
10/07/15 03:21 PM
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Joined: Feb 2005
Posts: 2,528 Mansfield, Tx
Jacob Pitt
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I actually thought that she might be overdriving the car also until I made a pass in it. I have driven a lot of different cars ranging from all types or tire sizes, suspension setups, and power and some cars will move around and not require any type of steering input. Super Stock cars will get that radial wobble sometimes, but this car has to be corrected going down the track. It swayed with the old alignment with the posi in it and was corrected with the alignment to where it would drive straight down the track in all conditions. Now that the axles are locked together it is highlighting a different issue I need to find. I have two travel races the next two weeks with a LODRS event in Noble,Ok and a National in Dallas so the car is on the back burner since the bracket season is all but over this season.
Last edited by Jacob Pitt; 10/07/15 03:36 PM.
2013 NHRA D4 Stock Champ #4 in the World IHRA Stock 2x IHRA Div.4 Stock Champ 14x Track Champ All using a Ultimate Converter Concepts converter. Call Lenny today 704-892-6837
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Re: Replaced a Posi with a spool now the car moves around
[Re: Jacob Pitt]
#1927934
10/07/15 07:55 PM
10/07/15 07:55 PM
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Joined: Jan 2003
Posts: 20,335 Park Forest, IL
slantzilla
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Just for grins, what size are the slicks/wheels. I had a car that would move around from too narrow of a wheel in the slicks with too little air.
"Everybody funny, now you funny too."
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Re: Replaced a Posi with a spool now the car moves around
[Re: slantzilla]
#1928119
10/08/15 01:05 AM
10/08/15 01:05 AM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
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Posts: 15,439
Val-haul-ass... eventually
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Just for grins, what size are the slicks/wheels. I had a car that would move around from too narrow of a wheel in the slicks with too little air. I experienced that same issue using 28 x 10 slicks on 8-inch rims. I couldn't get a decent footprint unless the air pressure was so low the back end would start to sway back and forth right about the time I'd shift into high gear.
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Re: Replaced a Posi with a spool now the car moves around
[Re: Jacob Pitt]
#1928213
10/08/15 09:20 AM
10/08/15 09:20 AM
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Joined: Feb 2005
Posts: 2,528 Mansfield, Tx
Jacob Pitt
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It's the M/T 28x9" slick with tubes on a 8" rim. We run 13psi in the tires. It is a stock suspension car with just a set of HD leaf springs on it. I plan to check the spring bushings as well as the housing. If I don't find anything I'll recheck the frontend and maybe put it on a alignment rack.
2013 NHRA D4 Stock Champ #4 in the World IHRA Stock 2x IHRA Div.4 Stock Champ 14x Track Champ All using a Ultimate Converter Concepts converter. Call Lenny today 704-892-6837
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Re: Replaced a Posi with a spool now the car moves around
[Re: Jacob Pitt]
#1928268
10/08/15 11:31 AM
10/08/15 11:31 AM
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Joined: Jan 2003
Posts: 7,131 Amarillo, Texas
BBR
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Amarillo, Texas
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Slick rollout sizes the same?
Drag Week 2011 - 77th place - DD Drag Week 2012 - 2nd place SRBB N/A Drag Week 2014 - Kapooya RMRW 2018 RMRW 2020
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Re: Replaced a Posi with a spool now the car moves around
[Re: Jacob Pitt]
#1928460
10/08/15 04:35 PM
10/08/15 04:35 PM
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Joined: Jan 2004
Posts: 8,658 fredericksburg,va
cudaman1969
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What bearing did you use on new axels?
Did you use the green bearings or the taper?
Last edited by cudaman1969; 10/09/15 12:01 PM.
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Re: Replaced a Posi with a spool now the car moves around
[Re: 1980volare]
#1928541
10/08/15 07:20 PM
10/08/15 07:20 PM
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Joined: Oct 2009
Posts: 1,267 North, Alabama
D-50
pro stock
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pro stock
Joined: Oct 2009
Posts: 1,267
North, Alabama
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I agree with 1980volare..........
1.33 60 ft,6.21 at 110.59 in the 1/8, pump gas small block,2950lbs,drag radials,mufflers and driven to track ...
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