Well I personally would never build wheelie bars with anything other than round CM tubing, but that is me. The bars Doug has are popular in Stock and a lot of SS cars. they dont really control anything but they do keep them off the bumper which in these moderately HP applications is what they are after. They need the pitch rotation to plant the tire and keep it there, so this style bar is very popular with some of those guys. They are not stiff enough to stop anything or give any control over what is going on but they will keep ya off the bumper in a moderately powered car, hopefully

I'm still a bit confused with the "sprung" and "un-sprung" bars... It looks like the spring is supposed to soften the hit when the bars make contact... which makes sense.. but how hard will it hit if there is no spring and how do I know if I want a soft hit?

The amount of power my new motor makes is still unknown.. We stuck it on a chassis dyno and the numbers we got was not accurate at all.. The graph max'd out at 699RWHP at 6000.. and that was on a part throttle hit as we were trying to roll into the power band because the dyno could not support the torque..

Regardless, I believe the motor has enough power for either a moon shot.. or it will carry the front tires for quite a distance and this is what I'm trying to avoid.. or at least control..

One thing I do like about the spring type(in pic) is
that IF you want to lock the spring you can(make it
solid) with a few washers
EDIT
also with the nut near the wheel you can tighten the
spring to make it beefier(pressure) and get less
movement

A backhalfed or stock suspension car that uses a lot of suspension travel usually can benifit from sprung wheelie bars as to not unload the back tires.A chassis car that has minimal suspension travel usually works better with solid bars and becomes a part of the chassis tune.

Don you want a solid bar..

Keep in mind shock adjustment is critical for launch control also.if your pulling moonshots,try softening up the shocks.

Don - FWIW - on the Demon I have 55" round bar sprung near the wheel.

But Demon dont need em He just likes to look cool

Here's my bars(jbrc c-moly)and stroud chute...Like others have said prolly wish i had gone with the launcher on the chute...

Did not need them with the hemi turd that was in it..Remember when it was a slow 8.80 car way back when

Hey Bill.. when is that bad beast gonna see the track again?

Don't you worry about Bill! You'll have me to contend with at MaTS! Heading for Wyo to pick up the engine for the Duster

....but I'll need at least a 2.5 head start!

Woohooo..Some freindly grudge racing...I get the winner

when you see my 1/8 mile time come up on the board you can leave Al!

What about the single wheel VS the double wheel?????