I'm working on an engineering project that requires an electric RC car. I have an HPI RS4 Rally. I custom fit some 1/8th scale OFNA buggy wheels on the car for increased ground clearance and reduced rolling resistance over bumps and such. Rigged up some T-Maxx shocks too...
Problem is, the 1/8th wheels/tires are about double the diameter of the stock 1/10th wheels and tires. So my gearing was doubled. I've tried getting the smallest toothed pinion and largest toothed spur (I think I'm something like 12/96 now), but its still way too weak. I have an unknown motor, I think it might be a 16T, and was running a second rate ESC on used NiCads. Yes, I realize just getting good parts to replace these will help a good deal, thats where you guys come in. What size/spec/brand motor should I get (no restrictions, doesn't have to be "legal"), which ESC, and obviously some new 1800mA or more NiMH battery packs will be needed. Here's what I was planning on upgrading to:
1. Lowest turn motor, which is what? 12 Turn?
2. Higher dollar ESC like a Rooster or Super Rooster
3. 1800mA(or +) NiMH batter packs, maybe 7 cell?
Do I need the fancy $100+ ESC or will a $60-70 one with less bells and whistles work? The car will see lots of part throttle, so the ESC's transistors get worked pretty hard. I burned out my cheap-o $25 ESC last year. The car only has to run for about 30 seconds at a time, and only at about 3/4 throttle when using the stock 1/10th wheels/gearing.
Also, here's a shot of my Traxxas Nitro 4Tec, currently in complete disassembly while receiving a 2.5 engine swap and "rally" conversion...