If you go to the Novak website it lists the suggested pinion tooth count for the 5.5, 6.5 or 7.5 motor only. If you click on any of the PDF's for the conversion kits the 4.5 is listed for Top Speed Runs ONLY. So basically for short straight shot runs on a smooth surface. I'd get the 7.5 (3000/kv). But I'm 99.9% sure we'll see a 8.5, 9.5 etc with even lower KV ratings. Something around 2400/kv on 4S is perfect.
Tonys Screws LLC
High Grade Alloy Steel Screws, Screw Kits and Mugen Parts
Last edited by TonysScrews; 05-22-2008 at 08:04 PM.