Thinking about a speed run car

[Metallover]

Well, I made some headway today. I got a Quark 6000kv motor from linc and soldered it up. I think the pinion is around 26t. Once I plugged everything in I lifted it up and tested it with my 9.6v "test pack". It worked fine so I plugged in my flightpower 3s lipo. It worked too. My friend was over, and I decided to show off what a 4s pack would do. I gunned it and parts went flying everywhere! I ended up snapping a drive cup and bending a center shaft into a boomerang.

After that I thought I'd test it with rear wheel drive and the 3s lipo. The car we really slow and made odd noises in the [ball] diff. We took in it and after a few minutes we had the diff out. It seemed a little hot, so we temped it and it was at 160f! I guess the diff was slipping. After trying a few different things and stripping a ball diff screw, we took the balls out of one a took some CA glue to it.

Now I esentially have a spool I plan to put in the front after I get a new center shaft next week. I ordered it today when I picked up my ball diff rebuild kit that had the stipped screw in it.

With the spool in the back it spun out, a LOT. I couldn't get up half speed. it was embarrasing when a cop drove up and asked us how fast it was. I couldn't get it past 20mph! Well, I hope I have better luck with 4wd. I'll probably post up some pics but until then I'll update ya'll when I get some good runs in with 4wd.