Extended wheelbase GTP2 - RC-Monster Forums

simplechamp · 02.16.2013, 04:55 AM

I'm thinking about doing a truggy length chassis for my Jammin X2 GT when the one I have now is worn out. The current buggy length CF chassis is molded and has front kickup (ordered it before I decided to do the GT conversion) which I'd like to get rid of.

Nice job on the extension.

Big House · 02.16.2013, 08:34 PM

I am lengthening my Mayhem also. It has a slight kick up in the front but the new chassis will get ride of that. I am going to keep it a truck..but lowered. Thanks.

Big House · **Motor change -** 05.06.2013, 10:26 AM

I took the extended GTP beast out for a test and tune session, working to dial in the steering and handling at high speeds as well as the aero principles of the XO-1 body and came to realization that I might be over geared for the Castle /Torx 2200. I initially had it geared at 24/51 and after about 10 minutes of running, I got the single red LED on the controller and no further movement. Batteries were warm, motor was less than warm but the fan was running. Re-geared to 20/51 on the same motor and pretty much got the same result after a few more runs, so I decided to swap out the Torx 2200 for the 1717 in the Mayhem 2.0. Still geared at 20/51...I hope to get better runs out of this combo. Here is a pic of the beast with the new motor.

_paralyzed_ · 05.06.2013, 11:36 AM

Hmmm... the 2200 should have no problem spinning those gears.

I would check all the bearings and make sure of a bind free driveline.

Big House · **No more heat.... -** 07.07.2013, 07:46 PM

After encountering heat issues with my GTP I tried several options, from changing the gearing to changing the motor and the gearing. I finally rested on affixing a push fan to blow on the lower part of the ESC and hooked it directly to the battery connectors. I cut out the bottom and connected a fan. I also cut a hole under the the fan through he top plate to increase the air flow. Got around to some test and tune in the heat and finally got through several speed runs with no top fan activation. I made a few modifications to the chassis and loosen up the pinion/spur mesh and put the 24 back in and like a beast it screamed. I am considering putting the 2200 back in but I like the 1520 in there. It gives such a wicked sound on 5s as it streaks by.