So i know this thread is a little old but wanted to get some input on the ht/ht 17.5 motor I'm running. I'm running on a small indoor clay track with maby a 70ft straght kinda smooth flowing track. Spec blinky tekin rs. I'm running 28/75 tried 26/75 78/25 78/26 played around with timing but I'm just not getting the results I'm looking For. Some guys running reedys and d4's and I just can't keep up with them. I'm averaging about 9 tenths 9f a second behind. I can run consistent laps back to back with the throttle hammerd. Any ideas on gearing/timing.