Re: Wheelie Bar questions
[Re: Plumcrazyracing]
#573779
01/05/10 04:42 PM
01/05/10 04:42 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Just built and installed bars (spring loaded) on a 71 Duster. Overal length is 64 inches. Caltracs, split mono leaf, rancho 5 way, transbrake, 3330 race weight, 10 oh to 10.20
I would like to know where to set the wheel height on the bars (at least a general idea). I have been told that i need almost 12" of height. Any truth to this?
Thanks!
I set my about 4" to the C/L of the wheel... but I run a 4-link... your going to get more wind up so I would start about 5" and play with it from there... you need to remember that you also have the spring thats on them... lift the bars all the way up to see where they would be locked up
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Re: Wheelie Bar questions
[Re: Plumcrazyracing]
#573784
01/05/10 10:24 PM
01/05/10 10:24 PM
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Joined: Jan 2004
Posts: 581 Hamiltucky
RBDuster
mopar
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mopar
Joined: Jan 2004
Posts: 581
Hamiltucky
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Quote:
RBDuster: How long are your bars? I assume you run Caltracs? Pics?
Bars are 60" and spring loaded. No Caltracs just ladderbars
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Re: Wheelie Bar questions
[Re: ITSDUSTA416]
#573785
01/05/10 10:26 PM
01/05/10 10:26 PM
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Joined: Jan 2005
Posts: 866 Winnipeg ,Mb. CA.
chryco
super stock
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super stock
Joined: Jan 2005
Posts: 866
Winnipeg ,Mb. CA.
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4 - 6" as per Comp Eng. details .I`m starting there . Chryco
Gas is fer washin' parts ....Alky`s fer drinkin' ...Nitro`s fer Racin'!
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Re: Wheelie Bar questions
[Re: curt jr]
#573786
01/05/10 11:10 PM
01/05/10 11:10 PM
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Joined: Jun 2005
Posts: 1,283 Colorado,U.S.A
4404dart
pro stock
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pro stock
Joined: Jun 2005
Posts: 1,283
Colorado,U.S.A
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Quote:
According to most wheelie bar charts that I've seen at the shop(BGR) and when we set them its usually between 3" to 6" on a ladder bar and 4 link car. On a spring car or Cal-Trac setup we generally set them no more than 8"
I tried 4 to 5 inches, and they hit so hard it unloaded the tires. I will try to get them between 8 and 10 to start this year. I watched a video of a camaro on yellowbullet and you couldn't beleive how much the rear rotates with caltracs and split mono leafs
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Re: Wheelie Bar questions
[Re: 4404dart]
#573787
01/05/10 11:49 PM
01/05/10 11:49 PM
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Joined: Jan 2003
Posts: 20,773 A collage of whims
topside
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 20,773
A collage of whims
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Mine are set at 10"L/10.5"R, measured at the center, car's happy with that. Car likes to hike its LF a bit more than the RF; probably under-caged, but it's a vintage car so I'm not changing that. Modified SS springs, footbrake, 5800stall. No snubber. 13x31s, usually @ 7.5PSI cold. It'll carry the front tires out a good way, as much as 100 feet, on a good track, sits down very politely. Just knocks the shoe polish off about 15% or so of the bar's wheels. Goes straight as a string. 368" SB Duster/904/5.38 Dana, about 3000lbs, my weight about 160. 100lbs ballast. Low 10s with a 750 carb, should go 10.0 with the 1050. (If that info helps.)
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Post deleted by Defbob
[Re: MR_P_BODY]
#573789
01/06/10 12:36 AM
01/06/10 12:36 AM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Re: Wheelie Bar questions
[Re: 9 Sec Phill]
#573792
01/06/10 01:31 AM
01/06/10 01:31 AM
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Joined: Jan 2003
Posts: 19,363 Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,363
Las Vegas
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Well I will be the stick in the mud. BUt as you can see it will depend on the car. There is no magic answer. A caltrac car making 500hp with a SB will need something different thsn the saem car with a 1000hp BB. Pick a hieght and get out and run it, video is an excellent tool when tuning things like wheelie bar height.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Wheelie Bar questions
[Re: Al_Alguire]
#573793
01/06/10 01:55 AM
01/06/10 01:55 AM
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Joined: Apr 2004
Posts: 1,981 SE Michigan
TS3303
top fuel
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top fuel
Joined: Apr 2004
Posts: 1,981
SE Michigan
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Quote:
Well I will be the stick in the mud. BUt as you can see it will depend on the car. There is no magic answer. A caltrac car making 500hp with a SB will need something different thsn the saem car with a 1000hp BB. Pick a hieght and get out and run it, video is an excellent tool when tuning things like wheelie bar height.
I agree with Al, it all depends with how quickly it pitch rotates. Some if there too high the momentum will unload the tires when the bars hit. On 9 sec Phils IMO when he had them low it wasn't allowing the chassis to transfer weight and spinning but not from unloading.
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Re: Wheelie Bar questions
[Re: TS3303]
#573794
01/06/10 02:38 AM
01/06/10 02:38 AM
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Joined: Dec 2008
Posts: 184 Central Coast
Plumcrazyracing
OP
member
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OP
member
Joined: Dec 2008
Posts: 184
Central Coast
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Thank you for the info guys. Forgive me for asking, but could someone explain "pitch rotate". For anyone that is interested, i am posting a link of video of the cars' launch. Any comments are welcome. My car is videoed right at the 16 second mark. Purple 71 duster in the left lane. http://www.youtube.com/watch?v=gnzDm3PHGxY
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