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car goes right at launch 4-link #2558767
10/04/18 08:10 AM
10/04/18 08:10 AM
Joined: Jan 2011
Posts: 672
st.louis,mo.
dart games Offline OP
mopar
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st.louis,mo.
attn chassis gurus,my dart goes right at launch on the foot brake,it has a 4-link,but don't do it all the time,has a spool and fresh rubber,it does drive straight down track,i will check to make sure its sqare in chassis,would I have to shorten the right top bar,i know I should do a flat at a time,if any more info on car is needed let me know,will check square today,will like to tnt Friday night

Re: car goes right at launch 4-link [Re: dart games] #2558769
10/04/18 08:19 AM
10/04/18 08:19 AM
Joined: Jan 2011
Posts: 672
st.louis,mo.
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st.louis,mo.
pics of 4-link

0708170907-00 (1).jpg0708170907-01.jpg0708170913-01.jpg
Re: car goes right at launch 4-link [Re: dart games] #2558772
10/04/18 08:54 AM
10/04/18 08:54 AM
Joined: Jan 2005
Posts: 4,243
Charlotte, North Carolina
sgcuda Offline
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I'm guessing it only happens on your lowest 60 ft. times. Besides shortening the bar 1 flat, I would also check weight distribution on all four corners. Might be biased.

Re: car goes right at launch 4-link [Re: dart games] #2558916
10/04/18 02:41 PM
10/04/18 02:41 PM
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Posts: 11,531
Fulton County, PA
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CMcAllister Offline
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Generally speaking, shorten the top right puts weight on the right rear and makes the car want to trend more left. But...one full flat is a bunch. And there are plenty of other things that can influence it - front and rear shocks and springs, etc. I would have it on scales before loosening anything and have it gone over. Looks like homemade stuff to me and if it's not right, it can be a trick making it work.


If the results don't match the theory, change the theory.
Re: car goes right at launch 4-link [Re: CMcAllister] #2558935
10/04/18 03:39 PM
10/04/18 03:39 PM
Joined: Jan 2011
Posts: 672
st.louis,mo.
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st.louis,mo.
hodges built 4-link if that tells you anything and how old it is

Re: car goes right at launch 4-link [Re: dart games] #2558995
10/04/18 06:36 PM
10/04/18 06:36 PM
Joined: Jan 2011
Posts: 672
st.louis,mo.
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last outing,1.45 60 ft,6.35 et,113 mph

Re: car goes right at launch 4-link [Re: dart games] #2559760
10/06/18 08:47 AM
10/06/18 08:47 AM
Joined: Jan 2011
Posts: 672
st.louis,mo.
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after squaring up the rear I found out,i took it out Friday night,drove strainght,best was a 6.39 105 mph,with a 1.39 60.foot brake leaving at 3000,rear tires are 33x14.5,do you think it should 60 ft better,car did not pull the wheels.nose stayed down at launch

Last edited by 70b1dart; 10/06/18 09:22 AM.
Re: car goes right at launch 4-link [Re: dart games] #2559899
10/06/18 02:47 PM
10/06/18 02:47 PM
Joined: Aug 2003
Posts: 43,127
Bend,OR USA
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Cab_Burge Offline
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Bend,OR USA
Do you want it to wheelie? If so make some adjustments to make that happen wrench
One of the Mopar drag engineers made a comment in one of their drag race seminars that I attended years ago about when the front of the car is going up more than a 1/2 inch with the front tires off the ground the car is not going as fast forward as it could work shruggy
In other words big wheelies are a waste of time and motion in their opinion shruggy

Last edited by Cab_Burge; 10/06/18 02:48 PM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: car goes right at launch 4-link [Re: dart games] #2560099
10/06/18 09:42 PM
10/06/18 09:42 PM
Joined: Mar 2006
Posts: 9,827
MI, usa
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Remember 60ft is about traction and power. 1.39 for thar ET isn't bad. The S/S and stock eliminator cars that show killer 60ft have lots of SLR and very good loose conveters. Wheels up is more a function of weight distribution spring rate and shock adjustment.
Doug

Re: car goes right at launch 4-link [Re: dvw] #2560181
10/07/18 12:09 AM
10/07/18 12:09 AM
Joined: Sep 2017
Posts: 340
Red Deer, Alberta
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Greenwood Offline
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Red Deer, Alberta
Now, my heap isn't anybody's version of the quickest, but it works. Here's how I do it:
With the axle on jack stands, I use the uppers to set pinion angle, adjusting both sides at the same time. I do it by hand, so as to feel that the tension is the same on both sides. I lock the jam nuts before moving on.
Next, I do the lowers, making sure the bolts slip in the holes easily on both sides. Before the next step, I check that there is full travel by moving the stands to the frame and letting the housing drop. It should do so as easily as if the bars are not bolted.
Then I add a half turn of pre-load both sides. With me in the seat, the left lower bar is neutral. As is, the car goes slightly left on the launch. I have tweaked this with some slight adjustments to the torsion bar pre-loads, to my satisfaction. I once adjusted the 4-link pre-load in order to get it to leave dead straight. That was a mistake. It got just a hair too interesting in how it wanted to go right when I dropped the nose at 117 mph.
Now, it's worth noting that my 4-link is in conjunction with factory leafs, and I use a home-built set of aluminum bushings as housing floaters. This ensures that the leafs do two things, and only two things- they hold up the car and they locate the housing square in the chassis.
I can cross the stripe, neutral it, and coast all the way to the turn-out with my hands off the wheel. It leaves nicely, runs true in the big end, and tracks straight as a string right from when I drop the nose.

Re: car goes right at launch 4-link [Re: dart games] #2560245
10/07/18 07:55 AM
10/07/18 07:55 AM
Joined: Jan 2011
Posts: 672
st.louis,mo.
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not intrested in big wheelies,i understand its a big waste in et and energy,only intrested as in running the number everytime,not intrested in empressing people by big wheelies,only intrested in going rounds

Re: car goes right at launch 4-link [Re: dart games] #2560438
10/07/18 06:32 PM
10/07/18 06:32 PM
Joined: Jun 2005
Posts: 6,257
gulfport, ms, west mi
rowin4 Offline
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As for wheelies, car moves better on 4 tires than two flat ones


it's ok to butt heads, just don't do it with a butthead
Re: car goes right at launch 4-link [Re: rowin4] #2560455
10/07/18 07:03 PM
10/07/18 07:03 PM
Joined: Sep 2017
Posts: 340
Red Deer, Alberta
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Greenwood Offline
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Red Deer, Alberta
But let's be real, here. Anyone who claims they don't want a pic of their car about half way to scraping the bumper, isn't really being honest. smile

Re: car goes right at launch 4-link [Re: Greenwood] #2560485
10/07/18 07:52 PM
10/07/18 07:52 PM
Joined: Aug 2003
Posts: 43,127
Bend,OR USA
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Originally Posted By Greenwood
But let's be real, here. Anyone who claims they don't want a pic of their car about half way to scraping the bumper, isn't really being honest. smile

Count me in on being that Guy up
The only thing I want to impress my opponents with it seeing my tail lights devil
I have heard more than one of my opponents make comments about my current bracketcar doing wheelie 18 inch confused shruggy
Which means I was out in front of them for them to see it with 1.27 60 ft. times boogie grin

Last edited by Cab_Burge; 10/08/18 04:02 AM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: car goes right at launch 4-link [Re: Cab_Burge] #2560685
10/08/18 03:36 AM
10/08/18 03:36 AM
Joined: Sep 2017
Posts: 340
Red Deer, Alberta
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Greenwood Offline
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Red Deer, Alberta
Ha! I once time-trialed with Darcy Clark's small-block stocker to my left. His car was about a tenth slower than me, but killed me in the 330. His wheelstand out my left window genuinely got my attention. Before I sell the car, I'm putting an 8" converter and a 5.40 gear, so I can get that pic. smile

Re: car goes right at launch 4-link [Re: dart games] #2560695
10/08/18 05:25 AM
10/08/18 05:25 AM
Joined: Jan 2011
Posts: 672
st.louis,mo.
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st.louis,mo.
the car in question did do big wheelies,but went right,did get runner up today in a bracket race in pro in other car that pulls 1 ft wheelies every launch on ft brake,with 1.33 sixtys

Re: car goes right at launch 4-link [Re: dart games] #2560963
10/08/18 04:36 PM
10/08/18 04:36 PM
Joined: Dec 2005
Posts: 11,531
Fulton County, PA
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CMcAllister Offline
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You don't want to drag the bumper, but trying to keep the front tires on the ground in a car that wants to have some pitch rotation to work, usually results in an inconsistent, slow situation. Raise the wheelie bars, let the front end work, until the car slows down.


If the results don't match the theory, change the theory.
Re: car goes right at launch 4-link [Re: dart games] #2560982
10/08/18 05:17 PM
10/08/18 05:17 PM
Joined: Jan 2003
Posts: 20,172
Park Forest, IL
slantzilla Offline
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Posts: 20,172
Park Forest, IL
I had a guy wheelie out past the 60' Saturday and come down in my lane. Fortunately my car is slow so I wasn't anywhere near him.


"Everybody funny, now you funny too."






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