Rear sway bar yes or no?, 22mm hollow RSR Style Tarett sway bar front, rear sway bar needed or not? Options

[CG-914]

Hi 914 suspension wizards,

I do club racing with the POC in CA on the tight handling courses so far (IMG:style_emoticons/default/piratenanner.gif) .

I'm about to install a front Tarett 22mm hollow RSR style sway bar.

Rear sway bar yes or no?

I do still drive the car on the street as well....

The car has Toyo R888, 140lbs springs so far, but it eventually is going to a 6 with 22mm torsion bars in the front and adjustable 300lbs springs in the rear and of course a 5 lug conversion.


Thanks

[CG-914]

So my plan is not to change too much between track days....

This time its going to be sway bar(s), so this time I'm only running 140lbs springs. The question is, if the tight track of Streets of Willow will work with ONLY 22mm bar front and 140lbs Springs rear or am I going to have too much understeer? (4 Cyl Car)

[slivel]

So my plan is not to change too much between track days....

This time its going to be sway bar(s), so this time I'm only running 140lbs springs. The question is, if the tight track of Streets of Willow will work with ONLY 22mm bar front and 140lbs Springs rear or am I going to have too much understeer? (4 Cyl Car)

I believe that you are over thinking this process. As an easy to change item, a rear sway bar is a relatively trivial piece of the total suspension puzzle and can easily be functionally removed from the equation by disconnecting one side drop link. Drive the car on track and see what it does. If you are not satisfied with the handling, make ONE change and reevaluate. If the handling is worse go in the opposite direction. If it is better, you are applying a beneficial correction. If you are not already familiar with the effects of tire pressure and are not routinely taking tire temp measurements at the track to evaluate your alignment settings, then I would suggest getting very familiar with this as a first step in dialing in your car. When I was developing my 914, I used test and tune Fridays at Willow to great benefit. Good luck to you, dialing in a new track toy can be a frustrating but ultimately very satisfying task when you hit the right combination.

[stownsen914]

Another data point ... when I had 300 lb/in front springs and 175 rears on my racecar, I used a 22 mm front sway bar and a 16 rear. When I went to heavier springs at both ends (500, 275 I think), I had to delete the rear bar to get the handling balanced. If I recall correctly 300 lb front springs are similar to 21mm torsions. I'm thinking that with 140 lb rears you are going to want the rear bar, but as suggested it's easy to test. Just keep it in place and remove one drop link to "remove" it for before/after testing.

Scott