GCinDC's Giant DH Comp

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Re: GCinDC's Giant DH Comp

Postby knoxie » Fri Apr 13, 2012 10:07 am

Greg going back to the broken side cover disc mount, doesnt Justin sell them on his site?

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Re: GCinDC's Giant DH Comp

Postby GCinDC » Fri Apr 13, 2012 10:47 am

knoxie wrote:broken side cover disc mount

first off, i was able to salvage the disk adapter - no idea where dbaker got it... i'm thinking i will thread on and jb weld to side cover.
disk_threadon_adapter.jpg

i do see justin's got spares of the newer (flat) side cover, but the MC wheel is on an older 9x7 with the rounded sides and the side covers are not interchangeable. i do have (dirty) spare side covers. and rather than redrilling, i'm thinking about sealing the covers on and squirting in snake oil. :lol:
Image
Lenk42602 wrote:JRH had some custom spoke nipples manufactured from Sapim that threaded into 12&13 guage spokes,

thanks, len. i'm sure JRH is tired of hearing from me. :lol: he told me he's got (or will have soon) nipples to fit 6.4mm holes, but these rims have 8mm holes... :?

i'm definitely not crazy about using washers. i never even rode in the rain, and can see some rust starting. what's ironic is that i got the wheel hoping it would be indestructible, but because of dish issue ended up constantly adjusting it and doing more maintenance than a 26 rim!

i wish it weren't so expensive to ship these motors/wheels around because i'd much rather have them built by a pro. might be worth it next time.
Youtube channel, 2013 Highlights vid. Ebike Nerdcast.
Giant DH Comp: 20s lipo (11.6Ah), hs3540, Adaptto Mini-E, 900W BMSBattery charger.
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Re: GCinDC's Giant DH Comp

Postby GrayKard » Fri Apr 13, 2012 11:13 pm

GCinDC wrote:first off, i was able to salvage the disk adapter - no idea where dbaker got it... i'm thinking i will thread on and jb weld to side cover.

Looks the same as the ones Grin Tech sells.

GCinDC wrote:i'm definitely not crazy about using washers. i never even rode in the rain, and can see some rust starting. what's ironic is that i got the wheel hoping it would be indestructible, but because of dish issue ended up constantly adjusting it and doing more maintenance than a 26 rim!

i wish it weren't so expensive to ship these motors/wheels around because i'd much rather have them built by a pro. might be worth it next time.

Maybe you should try a moped wheel setup, might be a better compromise.

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Re: GCinDC's Giant DH Comp

Postby GCinDC » Mon Apr 16, 2012 9:11 am

Received teflon coated 28g wire (probably should have gotten 24g, but so far so good)
Rewired Halls on the hs3540. long (boring) vid of an ebiker's saturday night. :lol:

Swapped old 45A controller for 37.5A sensorless. OMG. :shock: night and day. how did i put up with that sensorless for so long!

i'm back to wheelies and torque at 40mph, easily powering me up to mid 40's. that thing was not pulling 4kw, btw. rshunt setting must be different.. i'll have to test with watt meter inline.

anyway, i'm ready, skippic. :mrgreen:

i cleaned up the cockpit as well
clean.jpg
clean.jpg (109.65 KiB) Viewed 443 times

- chopped an inch off each side of handlebars :twisted: were 27.5", now 25.5" (GT's are 24")
- adjusted handlebars forward
- installed magura throttle
- adjusted brake lever position
- flipped gear shift upside to left side
- removed handlebars to route CA clamp under and through so it's centered
- centered temp sensor below CA (now runs off hall current, and doesn't have enough current to beep as loud. :lol: )
- wrapped and tied loose wires

holding my breath to whip around this stinker:
pollution.jpg
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Youtube channel, 2013 Highlights vid. Ebike Nerdcast.
Giant DH Comp: 20s lipo (11.6Ah), hs3540, Adaptto Mini-E, 900W BMSBattery charger.
GT I-Drive (sold), 20s lipo, 9C, 72V 45A 12FET.
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Re: GCinDC's Giant DH Comp

Postby Skippic » Mon Apr 16, 2012 9:24 am

I might need surgery, so no racing anytime soon.
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Re: GCinDC's Giant DH Comp

Postby knoxie » Mon Apr 16, 2012 5:14 pm

hey nice work greg, loved the video very cool to watch you work at speed :lol: its looking good, lets have some videos :D
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Re: GCinDC's Giant DH Comp

Postby GCinDC » Mon Apr 16, 2012 9:48 pm

cheers, knox. do me a favor and take some good vid of jozzer's ride, ok? :twisted: that thing sounds fun.

coupla quickies, with the requisite jump.. :lol:

Youtube channel, 2013 Highlights vid. Ebike Nerdcast.
Giant DH Comp: 20s lipo (11.6Ah), hs3540, Adaptto Mini-E, 900W BMSBattery charger.
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Re: GCinDC's Giant DH Comp

Postby Hyena » Tue Apr 17, 2012 8:28 am

Cool timelapse Greg. That's the reason I still have 2 H35 motors (one HT one HS) sitting in my workshop with damaged wiring :P
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Re: GCinDC's Giant DH Comp

Postby GCinDC » Tue Apr 17, 2012 3:54 pm

thanks. i put it off for a while... :roll: but sooo glad it's done. i'm like a kid with a new toy again. more precarious driving vids to come.

meanwhile, i just noticed maybe the controller's not well located. see the tire mark? :roll:
20120417_145522.jpg
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Youtube channel, 2013 Highlights vid. Ebike Nerdcast.
Giant DH Comp: 20s lipo (11.6Ah), hs3540, Adaptto Mini-E, 900W BMSBattery charger.
GT I-Drive (sold), 20s lipo, 9C, 72V 45A 12FET.
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Re: GCinDC's Giant DH Comp

Postby rui_fujino » Tue Apr 17, 2012 4:03 pm

good to see your motor is working again. From the last vid I noticed you seem to pedal really fast...whats your gears like?
If you pedal alot, you might wanna get higher chainsets or 11t freewheel?
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Re: GCinDC's Giant DH Comp

Postby GCinDC » Tue Apr 17, 2012 5:04 pm

Youtube channel, 2013 Highlights vid. Ebike Nerdcast.
Giant DH Comp: 20s lipo (11.6Ah), hs3540, Adaptto Mini-E, 900W BMSBattery charger.
GT I-Drive (sold), 20s lipo, 9C, 72V 45A 12FET.
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Re: GCinDC's Giant DH Comp

Postby chroot » Tue Apr 17, 2012 9:15 pm

Greg-

Frickin awesome good progressive rear shocks. Nice video! :lol:
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Re: GCinDC's Giant DH Comp

Postby Sacman » Wed Apr 18, 2012 12:20 am

rui_fujino wrote:From the last vid I noticed you seem to pedal really fast...whats your gears like?
If you pedal alot, you might wanna get higher chainsets or 11t freewheel?


Naw leave it... it gives car drivers (and the cops) the impression that Greg is really woking hard to be passing them all so fast like he does. :mrgreen:
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Re: GCinDC's Giant DH Comp

Postby knoxie » Wed Apr 18, 2012 7:13 am

great video greg, that bike is back to speed mode now and the usual antics ensue :D again this mental bike showing just how effective an ebike is in city traffic.
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Re: GCinDC's Giant DH Comp

Postby GCinDC » Wed Apr 18, 2012 8:04 am

chroot wrote: Frickin awesome good progressive rear shocks.

thanks. i'm amazed how i can roll over nasty bumps and not even feel it. i never would have stayed seated over such crap w/ GT. pain taught me well to stay off that seat. i realize now that i always used to stand on the bike as much to save my ass, as to stop quickly if nec. if only the seat were only more comfortable... and a bit further back. it's going to be raining today for return commute and the GT's beam rack (w/ mudguard) has no tire clearance on this bike (also testifying to it's smaller size).

anyway, it took a long time to get here - you all know - and now that i've got the 8" rear suspension, i'm really enjoying it. i'm still not 100% comfortable on the bike (and the wheels aren't strong enough) for the higher jumps. i'm getting there, but i'm sometimes worried about my wrists getting out of position on landings. but this ought to hold me for a minute til i get the 12" of suspension that i always wanted. :twisted:

rui_fujino wrote:you seem to pedal really fast...whats your gears like?

i generally try not to get my legs in the shot. :P 44T up front, 11T in back, but chain won't sit on that because of dropout adapter, but actually i've not really tried, so it's the second gear in the cluster, 12 or13T? bike came with 32T installed, but he gave me the 44T as well, and i can pedal meaningfully up to 35mph - that's about the speed i was going. if i can pedal meaningfully, i generally will, but over 35mph it's useless, and just messes with balance.

next, i really need to get a front light. too many close calls with cars doing u turns in front, or peds dashing across when it's clear -- oops, it's not clear, cause here comes the angel of death...
Youtube channel, 2013 Highlights vid. Ebike Nerdcast.
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Re: GCinDC's Giant DH Comp

Postby knoxie » Wed Apr 18, 2012 9:12 am

I did begin to wonder when the news said something amazing was flying through DC?? yesterday...I thought thats right Greg has got his bike back on the road? now I get it LOL!


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Re: GCinDC's Giant DH Comp

Postby Sacman » Wed Apr 18, 2012 10:09 am

GCinDC wrote: 44T up front, 11T in back, but chain won't sit on that because of dropout adapter, but actually i've not really tried, so it's the second gear in the cluster, 12 or13T


Can you get away with putting a washer between the frame and the axle's shoulder? It might just be enough to move the rear derailer out far enough from the rear gear cluster so that the chain DOES sit well in the 11T.
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Re: GCinDC's Giant DH Comp

Postby etard » Wed Apr 18, 2012 10:11 am

I did begin to wonder when the news said something amazing was flying through DC?? yesterday...I thought thats right Greg has got his bike back on the road? now I get it LOL!


Haha, awesome!

Greg, have you tried a rear axle mounting on the GoPro? My friend made a little bracket that attaches to the disc brake mount and makes some cool forward facing videos from this angle.
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Re: GCinDC's Giant DH Comp

Postby GCinDC » Wed Apr 18, 2012 10:26 am

Sacman wrote:Can you get away with putting a washer between the frame and the axle's shoulder?

absolutely not. frame is stretched beyond comfort now. in fact, during last install, i must have dinged the disc cause it's friggin warped now... :( and sounds like hell. :x

etard wrote:My friend made a little bracket that attaches to the disc brake mount and makes some cool forward facing videos from this angle.

awesome idea. can he give you a pic? will do asap (and mute sound!).

i worm clamped the gopro mount over front wheel axle this morning, but couldn't get it level. was pretty bouncy too. rear oughto to be good.

knoxie wrote: something amazing was flying through DC??

yeah, the city was abuzz about that. missed it tho. :(
Youtube channel, 2013 Highlights vid. Ebike Nerdcast.
Giant DH Comp: 20s lipo (11.6Ah), hs3540, Adaptto Mini-E, 900W BMSBattery charger.
GT I-Drive (sold), 20s lipo, 9C, 72V 45A 12FET.
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Re: GCinDC's Giant DH Comp

Postby chroot » Wed Apr 18, 2012 12:55 pm

You might want take the recommend, Get this B67 saddle and it's pretty comfortable sitting on the little wide saddle.

The peoples hyped the brooks saddle really best and very comfortable once you break in the leather (hard to soft). I am waiting for my brook saddle B73 saddle still in shipping progress and it's for my Yuba Mundo cargo ebike cuz it doesn't have suspension. Go figure. 8)
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Re: GCinDC's Giant DH Comp

Postby veloman » Wed Apr 18, 2012 5:59 pm

44x12 - ouch that is small. I ride a 44x11 and above 30mph the pedal rpms are too high for casual effort. I would suggest a 53 but you prob want the ground clearance.
The jump from 12 to 11 in back is pretty big too.
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Re: GCinDC's Giant DH Comp

Postby Sacman » Wed Apr 18, 2012 7:25 pm

veloman wrote:44x12 - ouch that is small. I ride a 44x11 and above 30mph the pedal rpms are too high for casual effort. I would suggest a 53 but you prob want the ground clearance.


Or go with an expensive Schlumpf Drive or Hammerschmidt with a 1:1.6 gear ratio crankset. You'll have no clearance or dropped chain problems with one of those.
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Re: GCinDC's Giant DH Comp

Postby GCinDC » Wed Apr 18, 2012 7:28 pm

Youtube channel, 2013 Highlights vid. Ebike Nerdcast.
Giant DH Comp: 20s lipo (11.6Ah), hs3540, Adaptto Mini-E, 900W BMSBattery charger.
GT I-Drive (sold), 20s lipo, 9C, 72V 45A 12FET.
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Re: GCinDC's Giant DH Comp

Postby Hyena » Wed Apr 18, 2012 7:50 pm

Yep get a schlumpf - they're a bit pricey but I can pedal along at 35 mph with a 34t chain ring on the front and a 14 on the back 8)
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Re: GCinDC's Giant DH Comp

Postby Accountant » Thu Apr 19, 2012 3:24 am

Hyena wrote:Yep get a schlumpf - they're a bit pricey but I can pedal along at 35 mph with a 34t chain ring on the front and a 14 on the back 8)



..or check : viewtopic.php?f=2&t=37269&p=566506&hilit=schlumpf#p566506
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