Drag Racing Discussions > Front Engine Dragsters
Front engine digger wheelie bars
tcoupekyle:
Thanks!
dusterdave173:
The Neil&Parks site has a great start with a wheel and tube that is perfect start to build your own set I agree that a single is best--two bars up top one lower- thing to remember is when you drill holes for length ( height) adjustment make the PRECISION not sloppy--that little wiggle from sloppy hole is enough to steer car--when centering always measure from axle flange or brake rotor--not the tires about 2 in off the pavement with driver in the car is close--higher and you will just experience wheels up and more violent launch that may upset car
MikenMpls:
I kept it simple with the McKinney adjuster and did the 3 bar, no brace, 72" long bars.
gregm784:
We run a 3 point, with a brace, .058 1.125 bar i believe. It's pretty stout. Typically i'll hit it for 4", then off for a foot, then i ride it for about 3 feet. We run right at 2" under the wheel. It'll float the front end about 2" in the air.
The bar was a little low in the attached picture, or the tire pressure was a little low. When we drop a 1/2#, we have to raise the bar. My kid monitors all that, so i don't know how much. on the flip side, when we go up a 1/2#, it'll fly the front end a little higher because it doesn't wad the tire up so much.
noslin:
im getting ready to do mine. concerning the brace, i can see how stiffening up the bar would help get on the tire sooner versus having soft bars. so, as a discussion point. if tire is wider then wheel creating soft sidewall with lot of wrap during launch then stiff bar might help out a bit with getting up on tire? and visa versa if running something like a wheel wider then tire to stiffen sidewall and stiff sidewall tire a softer bar would help to soften the hit as it would be more apt to get on the tire sooner?
thoughts?
im gonna go .125 wall 1.125 dia @ 5'. whats appropriate? some guys run short bars some guys run long bars. i have read in door-car world with big hp on pm's they will run a long bar. prob to help soften the hit a bit.
then on that note, more hp longer bar? so, say 200 mph or 1200 or so hp an hypothetical length of 5ft lets say and if running like A/F or faster then longer bar as those guys are more apt to use stiffer tire.
i guess point being could your 60's improve with a different bar length even though you have it tuned with the bar you have now. be interesting to see someones logs who has tried different length bars, stiff sidewall with braced bars versus non, and soft sidewall with stiff and soft bars.
anyways, i like this kind of stuff.
dean
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