Wheelie Bar
I'm really surprised that folks are just now figuring out that using light weight wheelbase extentions in the lower 3 gears is effective.
The ruduction of et is for several reasons. First the longer wheelbase will not allow the front to "unload" under acceleration in any gear. Using a "locked" rear suspension can't duplicate the effect. Front suspensions that allow little or no upward motion still can't do it either. The fact is that anytime you're accelerating, the physics simply dictate that you'll transfer weight rearward. So even if the suspensions don't allow "it", you still lose front grip. The wheelie bars allow you to place the point of rotation over 6' rearward of the rear axle centerline. and that provides a lot of leverage.
If you build some non flexing tube affair and bolt it solidly to the rear of the car and measure the amount of "pressure" that it takes to jack the front up 1 foot, then remove it and jack the front up again using the rear axle c/l as the rear pivot, I think that you'll see the metnod to T.O.O.'S madness.
The et reduction is not simply in the first 60' either. Anytime you can reduce the amount of rolling "friction" between the car and the track, it's like free hp. So the car will benefit all the way down, mph included.
.50 sec is a minimal reduction achieved with a car that was set up to handle well. It did have 7" rubber up front, but if the car was to be optimized for quarter miles, the tire could be smaller yet. Don't forget that T.O.O.'S car was no lightweight either.
A set of bars might be a nice thing to take to the track. Pin them on and go.
Thank You
-copied from Endyn Didn't feel like typing
Josh
The ruduction of et is for several reasons. First the longer wheelbase will not allow the front to "unload" under acceleration in any gear. Using a "locked" rear suspension can't duplicate the effect. Front suspensions that allow little or no upward motion still can't do it either. The fact is that anytime you're accelerating, the physics simply dictate that you'll transfer weight rearward. So even if the suspensions don't allow "it", you still lose front grip. The wheelie bars allow you to place the point of rotation over 6' rearward of the rear axle centerline. and that provides a lot of leverage.
If you build some non flexing tube affair and bolt it solidly to the rear of the car and measure the amount of "pressure" that it takes to jack the front up 1 foot, then remove it and jack the front up again using the rear axle c/l as the rear pivot, I think that you'll see the metnod to T.O.O.'S madness.
The et reduction is not simply in the first 60' either. Anytime you can reduce the amount of rolling "friction" between the car and the track, it's like free hp. So the car will benefit all the way down, mph included.
.50 sec is a minimal reduction achieved with a car that was set up to handle well. It did have 7" rubber up front, but if the car was to be optimized for quarter miles, the tire could be smaller yet. Don't forget that T.O.O.'S car was no lightweight either.
A set of bars might be a nice thing to take to the track. Pin them on and go.
Thank You
-copied from Endyn Didn't feel like typing
Josh
someone was in here a while back talking about making them.. Basically people said that there is no real point to an after market one because the stock on is not much worse... If you just replace the rubber bushings with bearings you get basically the same effect.
On the wheelie bars post... yes I can see what you are talking about but... I don't think that there are many people that are pushing that kind of power... plus it would have to be a track only car...
On the wheelie bars post... yes I can see what you are talking about but... I don't think that there are many people that are pushing that kind of power... plus it would have to be a track only car...
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