rear sway bar options

[ty901]

the patient; highly modified '66 (200 HP 1750#)
F torsion bars 19MM R torsion bars 26MM.
F sway bar 19MM through the body.
rear sway bar ??

intended use will be "spirited" (heh, heh ) street & the occassional track / DE event.
I've done some reading & gotten conflicting views. one says "... BF rear bar" another says this increases oversteer and a small (or no) bar is preferred.
not sure if the issues are different because of the SWB. i won't be carrying those lovely cast iron weights in the front bumper

all feedback greatly appreciated.
jerry

[IROC]

Hmmm...short wheelbase, lightweight and decent power, with 26mm rear torsion bars and stock fronts and a 19mm front bar... I would suspect that you don't want a large rear bar. I would think something like a 19mm that is adjustable. It seems you're really only striving to achieve neutrality and a big bar is going to scream oversteer right off the bat.

IMHO. YMMV and all that.

[SRT356/911]

Suggest you leave the rear sway bar off the car and see how you like it. Drove my track car without a rear sway for 7 years and had great control of the car. Easy throttle steering and very sweet in the turns.
If you don't like it, you can always add in a small bar. Definitely reduced oversteer issues. Slight lift and the nose tucks. Back on the throttle and the rear hooks up.

[ty901]

guys, great feedback. thanks! i'm leaning toward the no-bar option to start, but i want to do the upfront stuff now while the access is easy. is there a template for where to mount the perches for the brackets & where the drop links attach to the control arms ?
Speedo covers some of this here;

SWB 911R...the beginning

pages 13 & 35. he covers attachments well enough & i understand all of that. i'm a little hazy on orientation / positioning ... or is that critical?
i'm hoping to use my Weltmeister 22MM bar as a guide for layout, but does that mean that i'm stuck using a WM bar in the future ?
again, a BIG thanks.
jerry

[Chuck Moreland]

On a short wheelbase car, 19mm (it's actually 18.8mm) front and 26mm is already a lot of rear stiffness bias. The car likely would have too much oversteer with a rear sway bar.

You'd be better to bump the front torsions to 21mm, then add an adjustable rear sway.

[ty901]

Chuck;
thanks ... if it doesn't show I'm pretty clueless when it comes to suspension tuning. i had the rear torsion bars laying around & figured anything would be better than stock. i'll hunt for a set of 21MM fronts.
thanks again
jerry

[dagriff]

Originally Posted by SRT356/911

Suggest you leave the rear sway bar off the car and see how you like it. Drove my track car without a rear sway for 7 years and had great control of the car. Easy throttle steering and very sweet in the turns.
If you don't like it, you can always add in a small bar. Definitely reduced oversteer issues. Slight lift and the nose tucks. Back on the throttle and the rear hooks up.

+ 1. I broke the rear mounts, got the new ones from our host. Did a couple of autox with no bar while waiting for them, liked it as it was. New parts are still in the box!