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Wheels up launch, adjustment question #2039823
03/27/16 04:47 PM
03/27/16 04:47 PM
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Sunnyvale, CA
Jeepmon Offline OP
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As you can see in the picture, the left front lifts quite a bit more than the right front and this a ladder bar setup.. What is the best or easiest way to pick them both up equally?

When this pic was taken, the car hit the driverside wheelie bar harder than the passenger side and the passenger side, did touch, but barely, it left a very small chalk mark and the car pulled hard right...

Whats your recommendations?


Last edited by Jeepmon; 03/27/16 04:49 PM.
Re: Wheels up launch, adjustment question [Re: Jeepmon] #2039826
03/27/16 04:49 PM
03/27/16 04:49 PM
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Cotati, CA
Dave Hall Offline
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Try a quarter turn of pre-load, right side Don.

Re: Wheels up launch, adjustment question [Re: Dave Hall] #2039827
03/27/16 04:50 PM
03/27/16 04:50 PM
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Originally Posted By Dave Hall
Try a quarter turn of pre-load, right side Don.


That seems easy enough... Thanks Dave

Re: Wheels up launch, adjustment question [Re: Jeepmon] #2039829
03/27/16 04:52 PM
03/27/16 04:52 PM
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MR_P_BODY Offline
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Put a anti roll bar on it... your system
is flexing
wave

Re: Wheels up launch, adjustment question [Re: Jeepmon] #2039840
03/27/16 05:05 PM
03/27/16 05:05 PM
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Dave Hall Offline
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Good call Mike. Marcus had the same issue Don and his Charger was turning left a little as well. The little pre-load solved it on his ladder bar but the car looked slightly jacked on that side sitting still.

Re: Wheels up launch, adjustment question [Re: MR_P_BODY] #2039855
03/27/16 05:19 PM
03/27/16 05:19 PM
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Jeepmon Offline OP
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Originally Posted By MR_P_BODY
Put a anti roll bar on it... your system
is flexing
wave


I knew an anti-roll bar would solve the problem, but wanted to see if there was another fix... I know if I ask Alguire, he would say "race on the stop... problem solved"... up

Which leads me to yesterday's events at Sonoma.. In Vegas, the best I could muster was 9.0x in their 4500 DA air... Sonoma was awesome air yesterday, which my ET predictor had me dialed in for an 8.6x... I sooo wanted to run it all out just to get that 8.60 time slip... but I promised myself that I need the experience of setting the car up for S/ST racing... So all day was designed to figure out the numbers to put in the box

But it didnt matter as the car broke before I could even get to tech... So yesterday was a scratch

Re: Wheels up launch, adjustment question [Re: Jeepmon] #2039857
03/27/16 05:21 PM
03/27/16 05:21 PM
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Dave Hall Offline
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Dammit! What happened now??? shruggy

Re: Wheels up launch, adjustment question [Re: Jeepmon] #2039858
03/27/16 05:25 PM
03/27/16 05:25 PM
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Romeo MI
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Even with the anti roll it will help plant both
tires better.. better for you in any racing..
you cant have flex and be consistent.... what did
you break
wave

Re: Wheels up launch, adjustment question [Re: Dave Hall] #2039860
03/27/16 05:26 PM
03/27/16 05:26 PM
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Jeepmon Offline OP
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Originally Posted By Dave Hall
Dammit! What happened now??? shruggy


I think my car is teaching me the finer points of patience and tolerance...

Re: Wheels up launch, adjustment question [Re: Jeepmon] #2039863
03/27/16 05:33 PM
03/27/16 05:33 PM
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Dave Hall Offline
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Dude! You must be a patron Saint by now...Sheeesh!

Re: Wheels up launch, adjustment question [Re: Jeepmon] #2039865
03/27/16 05:38 PM
03/27/16 05:38 PM
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WHITEDART Offline
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Looks like a little more air is needed in the rear tires


In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
Re: Wheels up launch, adjustment question [Re: WHITEDART] #2039868
03/27/16 05:44 PM
03/27/16 05:44 PM
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Originally Posted By WHITEDART
Looks like a little more air is needed in the rear tires


He needs to put the anti roll on first then see
about air.. its loading the RR harder due to twisting..
if it applies equal load to both tires it might be fine
wave

Re: Wheels up launch, adjustment question [Re: MR_P_BODY] #2039884
03/27/16 06:05 PM
03/27/16 06:05 PM
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Originally Posted By MR_P_BODY
Originally Posted By WHITEDART
Looks like a little more air is needed in the rear tires


He needs to put the anti roll on first then see
about air.. its loading the RR harder due to twisting..
if it applies equal load to both tires it might be fine
wave


8.5 lbs in both tires

Re: Wheels up launch, adjustment question [Re: Jeepmon] #2039900
03/27/16 06:29 PM
03/27/16 06:29 PM
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Originally Posted By Jeepmon
Originally Posted By MR_P_BODY
Originally Posted By WHITEDART
Looks like a little more air is needed in the rear tires


He needs to put the anti roll on first then see
about air.. its loading the RR harder due to twisting..
if it applies equal load to both tires it might be fine
wave


8.5 lbs in both tires


Depending on the weight and tire size you would
be in the ball park
wave

Re: Wheels up launch, adjustment question [Re: Jeepmon] #2039913
03/27/16 06:49 PM
03/27/16 06:49 PM
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I said more air in tire. because it looks to me like too much. wrinkle ..I run 13+ on my car...these are heavy cars...talking to Al in Vegas he recommended that I try more air

Last edited by WHITEDART; 03/27/16 06:55 PM.

In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
Re: Wheels up launch, adjustment question [Re: WHITEDART] #2039925
03/27/16 06:57 PM
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I run driver side bAR 1in inch higher than passenger


In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
Re: Wheels up launch, adjustment question [Re: WHITEDART] #2039934
03/27/16 07:04 PM
03/27/16 07:04 PM
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Originally Posted By WHITEDART
I run driver side bAR 1in inch higher than passenger


If the car applies the load equally they wouldnt
need 2 different pressures.. they would be working
together.. but you can do what you want to
wave

Re: Wheels up launch, adjustment question [Re: MR_P_BODY] #2039958
03/27/16 07:43 PM
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just things that I would try it wouldn't cost money.no anti roll bar here

Screenshot_2016-03-27-14-39-46-1.png

In the 8s N/A.with Brett miller W8's
5.07 at 133 at 2700lb
Re: Wheels up launch, adjustment question [Re: WHITEDART] #2039963
03/27/16 08:05 PM
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Originally Posted By WHITEDART
just things that I would try it wouldn't cost money.no anti roll bar here


You dont have the flex so the bar isnt needed..
a couple of things are happening on his.. the body
is rolling over to the RR and the axle is trying
to go up into the fender well.. its trying to roll
the axle over on the left rear.. if the body set
level on the launch both tires would work together..
I dont put a 4-link in a car without the anti roll
due to all the heims involved
EDIT
if it was going right before the bar hit.. put
some pre load in it(more down pressure on th RR)
wave

Last edited by MR_P_BODY; 03/27/16 08:49 PM.
Re: Wheels up launch, adjustment question [Re: Dave Hall] #2039973
03/27/16 08:39 PM
03/27/16 08:39 PM
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Originally Posted By Dave Hall
Try a quarter turn of pre-load, right side Don.


First off get a set of scales and scale the car before you touch anything. More than likely you are light on the right rear side of the car causing the slight body roll and driving right.Once the rear is set properly it will leave straight and pick up both wheels evenly. You Dont need an anti rollbar.

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