Hi guys, I have a 10lL4. I recently baught a new servo. It is smaller then what I used to use. I naturaly mounted it as low as posible . I think I may have it to low. I have noticed that my car goes crazy on a bumpy serface and sure I am expereancing bump steer. What is the perfect hight for the sevo ?? Is there a way to calculate where the sevo should be mounted for the best link angel and all around steerig performance?

Working with your tie rods to get them parrallel with your upper a arms in the horizontal plane will help with your bump steer problems. You may need to purchase or fabricate a toe corrector for the left front to accomplish this.
It may take some time and effort but it is well worth the effort especially if you run on a bumpy track.

One of these for the left side.
http://www.lefthander-rc.com/catalog/product_info.php?products_id=138

You might want to read this page (http://www.hobbytalk.com/bbs1/showthread.php?p=2106243&highlight=bump+steer#post2106243). Starting with post # 1626.

Thanks, That helps. I would still like to find a formula for figuring akerman also. (sorry if I spelled that wrong).

www.auto-ware.com

here's a link that shows ackerman www.auto-ware.com/setup/ack_rac.htm

Thanks for the info....