Wheels up launch, adjustment question
#2039823
03/27/16 04:47 PM
03/27/16 04:47 PM
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Posts: 8,094 Sunnyvale, CA
Jeepmon
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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.
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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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Jeepmon
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Try a quarter turn of pre-load, right side Don. That seems easy enough... Thanks Dave
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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
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Put a anti roll bar on it... your system is flexing 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"... 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
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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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MR_P_BODY
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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
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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
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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
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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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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
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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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Jeepmon
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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 8.5 lbs in both tires
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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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MR_P_BODY
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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 8.5 lbs in both tires Depending on the weight and tire size you would be in the ball park
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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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WHITEDART
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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
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Re: Wheels up launch, adjustment question
[Re: WHITEDART]
#2039925
03/27/16 06:57 PM
03/27/16 06:57 PM
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WHITEDART
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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
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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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MR_P_BODY
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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
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Re: Wheels up launch, adjustment question
[Re: MR_P_BODY]
#2039958
03/27/16 07:43 PM
03/27/16 07:43 PM
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WHITEDART
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just things that I would try it wouldn't cost money.no anti roll bar here
In the 8s N/A.with Brett miller W8's 5.07 at 133 at 2700lb
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Re: Wheels up launch, adjustment question
[Re: WHITEDART]
#2039963
03/27/16 08:05 PM
03/27/16 08:05 PM
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MR_P_BODY
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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)
Last edited by MR_P_BODY; 03/27/16 08:49 PM.
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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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WheelsUp73
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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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