View Single Post
Old 11-01-2010, 07:26 AM
Senior Member
Join Date: May 2007
Location: BloemfonteinFree State, SOUTH AFRICA
Posts: 156
My Gallery
My Models
My Feedback
Default My Cen GST Brushless conversion

I just finished my (rather simple) brushless conversion of the Cen GST. Here's what I used and a few close-up pics of how it looks all hooked-up. She runs great, but I needed to dial in a lot of negative expo (-25%) to get her to accellerate smoothly.

1 Motor - Castle Neu 1520 1600kv
2 ESC - Mamba Monster V3. Space beside motor too small and had to mount the ESC to the carry handle.
3 Motor mount - Tekno RC for Castle/Neu motors
4 Pinions - Stock 17/21t clutchbell pinions threaded onto RC-Monster 2-speed Pinion adapter for 5mm shaft
5 Spur/Gearbox - Cen GST 7.7 stock spurs and 3-speed gearbox (no mods)
6 Batt trays - Tekno RC batt trays with 10mm foam tape underneath and fixed to TVP's with velcro Tekno RC batt straps
7 Batts - 2x 5000mah 5S 18,5V 30C lipos in parrallel for 10000mah 5S 18,5V output.
8 Removed 5-cell Rx hump-pack. All servos driven by main batts through Rx.
9 Mechanical braking done by throttle servo via a servo Y-lead. No braking and no reverse programmed into ESC. Because I used a Futaba 3PM system with the Castle ESC, I had to reverse the throttle channel. This resulted in the brake servo applying brakes while holding full throttle. Therefore I had to reverse the servo direction by switching the servo Potentiometer- AND Motor wires and re-soldering them.

This is a quick and simple conversion. If you want to eliminate the gearbox in favour of a single spur/diff set-up, it will become much more complicated. I am too lazy for complicated. This set-up works and she is plenty fast! It also has the added advantage that it can be switched back to nitro quickly and easily.
Attached Thumbnails Click image for larger version

Name:	Sp45242.jpg
Views:	894
Size:	92.1 KB
ID:	1526514   Click image for larger version

Name:	Je11189.jpg
Views:	550
Size:	91.9 KB
ID:	1526515   Click image for larger version

Name:	Sd44625.jpg
Views:	356
Size:	107.2 KB
ID:	1526516   Click image for larger version

Name:	Lb46611.jpg
Views:	375
Size:	77.0 KB
ID:	1526517   Click image for larger version

Name:	Sq17182.jpg
Views:	705
Size:	103.8 KB
ID:	1526518  
lomdel is offline