Drag Racing Discussions > Front Engine Dragsters

Wheelie bar mount questions.

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arush:
I am in the process of building a 5' (three bar) wheelie bar.
(1) Are you guys using Heim's or Clevis' for the top mounts ?

(2) How is the best way to find the dead center of my frame, 5' back on the floor?

Measure straight off of the face of each disk, then split the difference ?
Find the middle of the motor plate, then use a square and a string ?
I appreciate all feedback.

dusterdave173:
I have a 200 inch car and went with 48 inch 3 bar  all the builders say use longer but hey this works
Best place to start is with the bar/sideplate/ wheel assembly from Neil & Parks for about $125  and..they have all the CM tabs etc you may need
I used clevis ends on the top bars and tabs on the chassis with push pins
rigid top bar clevis at the chassis and a heim at the lower bar
use a clevis and tab at the chassis on lower bar
This way you can measure and eyeball it and you always have fine tune with heims on ends of top bars--they work well for any left right you need
Always measure from the axle flange or brake rotor
I found out the hard way that adjustment holes in lower bar must be drilled with precision and tight when you slide pushpin in  any slop and the wheel can move ever so slightly and it will effect things
I redrilled mine after car was not the same every pass--it solved my issues---I adjust the heims and get everything close as possible with good tape measure like within a 32nd or maybe 16th  best I can do
It seems to stay even when dragging it around bumping it pretty hard etc

I can't seem to post pix on this site they want zero pixels to load and even on basic etc settings on my camera I just can't do it--so email me dusterdave173@gmail and I will send pix if you want

there have been some nice set ups posted here before but no need to over build them  yea longer is better yadda yadda but my 48 incers work perfect   a smooth pass is all about many things like wheelie bar ht, leave RPM, tire pressure, weight up front--it is the combo of these things that has to be worked out for your car/converter combo
once you get there you wind up adding more power and back to the drawing board LOL!

dusterdave173:
well 48 inch works on my weak car--big power may be another kettle of fish I am sure Roo and Bruce and others here have better advice 

arush:
Dave.
I bought a 5' kit from Dragster Supply and it came with Clevis' for the top mounts.
I didn't know if there were any other advantages to using a Heim beside the ability to adjust the bars from side to side ?
If you have the bars set dead center from the beginning is it really necessary to have that side to side adjustment ?
I will also be using the push pins.
Would the bars be easier to install and remove with a Heim ?
I just want to do it right the first time.    Thanks

 

dusterdave173:
Really easy to install and take off with clevis at all 3 points on car and push pins
the heims at the bottom allow plenty of side to side to center things
clevis and tabs keep slop to a minimum very important--shoot me an email and I will send plenty of pics
also when I take mine off I can store easy in trailer  will send pix of that as well
yea 5 ft is cool mine might have even worked better longer but...

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