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Author Topic:   Q for Z-link/swing arm
Steph
Dirt Full Roller

Total posts: 60
posted July 13, 2001 11:52 AM UIN: 6762482
What angles do you run your trailing arms at and why? What changes do you make to match track conditions?

We run a z-link on birdcages and run our arms pretty straight as that's what we were told worked best for our car dealer. Thinking about angling the left side and wanted to get your opinions. We hear to do this from another z-link driver, and quite a few swing arms.

What differences should we be taking into account when we try swing arm settings on our z-link?

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--Steph--

wfoondirt
Dirt Maniac

Total posts: 142
posted July 17, 2001 09:07 AM
Here is what i run as a basic setup on my z-link. 15" links with the lr lower @ 17 degrees and the upper @ 4 degrees, rr lower @ 15 degrees and the upper level. Torque link @ 18 degrees.

I imagine that with all your links virtually level the car doesn't lift under accel unless you run a very steep torque link angle.

Adding angle to the lower links will make the car lift under power and by having the lr at a different angle than the rr there will be an effect of adding wedge to the car under accel.

Ideally you want to adjust the lower links for different track conditions, but this is hard to do at the track with the springs mounted on the links, not only does it take extra time but its also hard to get the wheel weights back the same. For the sake of ease and time i will usually move the torque link laterally to the right to decrease the amount of wedge that is added under accel , or i also have mounts for longer upper bars (32") but i only use those when its really tacky, and as of late most of the tracks around here are pretty dry, and i have found that adjusting the torque link along with wheel offset and stagger changes have been the only adjustments that i have really needed to do.

The only real issues that you need to be aware of with adding angle to the lower links is that it adds roll/ride steer but on virtually every z-link i have seen its still a pretty minimal amount. Also it makes the handling vary more with roll/ride but again its pretty minimal. My driver still says that this car is the easiest car he has ever driven and is very consistant lap to lap.

Btw, congrats on the win at charleston earlier this year, looks like you've had a pretty good season thus far.

Steph
Dirt Full Roller

Total posts: 60
posted July 18, 2001 01:44 PM UIN: 6762482
Thanks for all that!

We're starting to come around I think. Good a couple weeks, try something new and then have to figure out how to back out of it for a couple weeks. Still experimenting a lot in areas that we don't know much about... but I think we're learning!

Thanks again.

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--Steph--

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