I learned on the track in Summerville, and raced the track at "The Grove" in Rock Hill... that track is wicked fast with the right setup and drive line.
For a servo for the steering, I would use something like the airtronics 94357 or a Futaba 9451...you want something that is fast and has some tourque behind it, or what will happen with the oval racing is that the servo will load up with the turning force till it can handle...this will make you think that the car is too tight (pushing) and it won't matter what you do to free the car up, it just won't work. Then when you do get a good servo, you will be chasing your tail.
As for a flat track, the same setup information will work, but the trick is to use foam tires. running the wider tires on the outside and the narrower tires on the inside will be the best bet. Now, I hadn't shared this information yet, but if you are using an adjustable pivot ball suspensioin, to get more ON-Throttle corner speed, draw the Right Rear tire in about a 1mm and extend the LEFT Rear out 1mm... On the 4wd car,this will cause the car to be able to put more weight on the right rear tire, causing it to wear out a little faster, but it will be worth the speed you will pick up. If you do just the same on the front of the car, extend the left front and draw in the right front, you can get a little more turn in by using the wieght transfer of the chassis to force the right front tire into the ground, causing more traction so you can let off the throttle later and still keep the car from pushing. (***I know that this sounds incorrect, but trust me it works!***) But you have to remember that you can only go just a little bit at a time untill the effect of the change has no more advantage. You need to balance the tire wear out equaly.
In running an oval car, if you have a temp gun or guage, take the temps of the tires in 3 places....Inside/Middle/Outside----IMO You want to get the IMO temps equal all the way accross in tire...at that point, you are getting the most grip out of the THAT tire.
Now to get the most out of ALL the tires, you want to balance the temps as much as you can on all 4 tires. This is done by using cross wedge.
....Wedge in this case is the balance between two corners of the car...
LF (left Frong) and RR (right rear)
RF (right frong) AND LR (left rear).
In this case, to get the tires to equal temps, you want to balance the temps out by adjusting the shocks. I know that you might not have the adjustable shocks, but if you do, try to get the temp the same from the LF to RR and RF and LR. This is not as hard as it may seem and it is easy to do after you have already set the temp of the IMO (see above)
If I have lost you, please pm me with a phone number and I will call and explain a little more.
Being fast in Oval is about being consistant...the same line, same speed, time and time again. You should be able to run lap times within .2 seconds of a lap after lap. REMEMBER>>>BE SMOOTH...Pushing the car causes you to be inconsistant, but if you let the car "flow" with the track, you will see your times go down and your speeds go up.....If you think your car is fast, you might be out of control, but if you get to the point that you feel the car is slow, look at the times. Slow is fast and fast is slow.
You will get to a point where you will let off the throttle and tap the brake and turn all at once and you will find yourself picking up a half-second or more per lap when you get it just right.
Am I going back racing?...Hmmm.. Not anytime soon... But soon enough.