I got to the track on saturday and tested my gear diffs. Track is Jackson RC in NJ, Med grip unsealed sprayed asphalt. I had 2 cars running, the "slow" car is 17.5 no timing no boost, duo 1 middle hole 3.5FDR. The other car is 17.5 open, 208, etc.
So I stared with the slow car with a front gear diff and rear ball diff, I had put 50k in the front as it was all that I had. This car was a bit loose with a 13.5 in it, but now with the slower motor and diff it had amazing turn in, but had the expected on power push. I then put the other gear diff in the rear which had 5k in it. This setup was good, but I had a lot of trouble getting around the sweeper. With practice almost done, I put the spool back up front, got the sweeper back, but got a push on the slower speed corners. I went with this setup for the rest of the day. I am going to try the front again with some thicker fluid, I think with the small gears and only 2 spiders its going to be hard to really lock up this diff, there just isn't alot of surface area.
I had put the rear diff in the fast car to start, my car is generally loose at this track in the beginning of the day, and now it was 5x worse. I tried to plant it, and it was good most of the time, but I found myself every once in a while either getting a wheel up on a curb and looping the car, or powering too hard out of a corner and fishtailing, so I just put my ball diff back in for the day. I meant to test it after racing at night where the car was really planted, but I forgot.
I think I will be running it for sure on carpet, and it may end up being something I can run at night outdoors, we'll see, unfortunately its a long trip to the track to test too many variations and setups.
Mike L. Awesomatixusa.com | TQWire.com | Islandraceway.com |JacksonRCracing.com | Horsham RC | Sweepracingusa.com