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  1. GPM

    GPM's DH Comp Build

    In April I finally made some decisions regarding battery packs and charging arrangements, I did some calculations on a spreadsheet to familiarize myself with the setup I decided to go with the 36s2p arrangement and ordered myself 12x ZIPPY Compact 5800mAh 6S 25C Lipo Packs from HK, luckily...
  2. GPM

    GPM's DH Comp Build

    Hi All, Just as promised in my last post, I have finally been able to find time to make the internal fan / centrifugal air flow modifications to my Crystalyte hub motor. Firstly Id like to say thanks to "spinningmagnets" for the inspiration to look into centrifugal air pumps, and...
  3. GPM

    Giant Comp DH bolt on build

    Hi Chalz, I'm pretty sure that the hall and phase connections you need are as follows :- Controller: Motor HALL : Yellow Yellow Green Blue Blue Green PHASE: Yellow Blue Green Green Blue Yellow As...
  4. GPM

    GPM's DH Comp Build

    Last couple of photos - The Swingarm with TA's finished and Painted. Thats all for now but I can tell you that I have my 12 battery packs ordered from HK and Im hoping to do some more work on the motor cooling, i.e fitting some internal fan blades and running another smoke test in the...
  5. GPM

    GPM's DH Comp Build

    While there are quite a few options out there regarding Torque Arms only a couple really stood out to me as options for a high power DH Comp build and I could rule out 1 of the two simply because it altered the axle height leaving me we with "Doctorbass Ultimate Torque Arms V5" as my choice...
  6. GPM

    GPM's DH Comp Build

    A couple of updates today :- One of the things that was puzzling me when I started this project was what to do with the sheer number of extra controls mounted on the handlebars, particularly if your like me and have become used to certain conventions, such as the throttle and front brake on the...
  7. GPM

    GPM's DH Comp Build

    @magicpie3focuspower - I couldn't find I UK supplier of the red Urethane coil varnish/paint that most people seem to be using, I've noticed a lot of the products used are US supplied, and have "ground only" or other special shipping restrictions, for example the Scotchweld DP420 expoy that is...
  8. GPM

    GPM's DH Comp Build

    @litespeed - As to mounting the battery's I've not entirely made up my mind yet, I'm considering either making a vacuum forming mould and making a 2 part box ( Motorcycle Fuel Tank Style ) within the triangle, this would have to be polycarbonate sheet .. my guess would be about 4mm thick as...
  9. GPM

    GPM's DH Comp Build

    @Spicerack :- Many thanks for the heads up on Justin's thread and John in CR's work, so far it is reinforcing my theory that increasing airflow is key to increasing long term cooling and therefore power, rather than relying on the hub-motor's mass to absorb enough thermal energy for short bursts...
  10. GPM

    GPM's DH Comp Build

    Its been a while since I last posted an update so here goes :- After purchasing an 8" 3leg puller I was able to spit the motor and start the process of uprating the phase wires and sensor cable. my first task was to grind out the wire channel in the axle a little and remove the sharp edges...
  11. GPM

    GPM's DH Comp Build

    The Cree's have arrived , and I have spent some mounting the Cycle analyst directly on the handlebar mount as I wasn't happy where it was. Whilst I wait for the FEP coated ribbon cable for the halls sensors and the Turnigy 10AWG for the phase wires to turn up I decided to spend some time...
  12. GPM

    GPM's DH Comp Build

  13. GPM

    GPM's DH Comp Build

    GPM's E-Bike Project Jan 2013 Hello All, Having had several e-bikes, modified a couple using off the shelf parts I was delighted to discover the ES forums in November of last year. After taking inspiration from several of the projects here and having lurked in the background for a few...
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