High Voltage Tuned Big Hit BBSHD / ASI BAC855
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- čas přidán 7. 04. 2023
- It's spring, and the Big Hit is finally getting ready to ride. This is an ongoing project from last year with a vintage 2006 big hit frame from specialized. The power train is a bbshd along with a BAC855 with in house high voltage tuning. There areo
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The High Voltage upgrade kit for the BBSHD can be found at highvoltagekits.com/hv-shop/p... please make contact to order via the form on bottom of the page.
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/ @highvoltagekits - Jak na to + styl
This is giving me a lot of ideas right here. Thanks Capt.
You are very welcome!
Awesome bike. Love those long travel downhill bikes. They make great conversions.
They sure do. Cheers!
I had bad chain skip too on the smallest cog ,I had to bring the chain line directly right in line with that smallest cog. I used 5 spacers too on the chain-ring to bring it out.
The chain-line looks way off from a normal chain-line , but it NEVER skips now. The larger rear cogs are big enough they don't slip with the chain being so far off center of them.
Using a wide/small tooth chainring really helped too. I used the lekkie 52t
Cheers Keith it's a single speed setup so the line is good. Some parts are a bit experimental so not 100% sure the cause yet.
The chainring adapter is awesome. I got a different one. But made my build so much better. Chain alignment is big and this makes easy! Great build.
Yes, I wish John would get more made to sell, I have wanted one for quite a while now.🙃
I will chat to the guy who made it shortly.
@@HighVoltageKits tell him thanks! 👊👊💪💪
It looks and sounds good!
Cheers Gerard!
This video made me get the bac855 for my bike which is just like the bike in the video. Hand built Iron horse with dual 52 volt 20ah packs but they only have 40 amp bms. My bike does pull the full 2800 watts until my batteries get to 54 volts. Running a parallel battery manager which makes all the difference in amp draw.
Sounds great. Have you posted some pics on our discord?
Dam thing looks fast. I bought my BAC 855 from you guys almost 2 years ago. I already had the BBSHD from LUNA. I have a cheap Dolomite fat tire frame with a few upgrades but nothing special. Im still using a cheap 52v 20 ah with you 60 - 70A Map and a cheap chinese battery with disabled current limit. I keep it in first gear as I dont go fast and i like power climping when i need it. Battery wont last long if i get into much at all.
I remember it well Bob. Great to hear from you!
That Bike and setup look great - I've been running single gear BBSHD+ASI BAC855 for 4000+ miles - on a single chain - no more worries with it! 28T front 36T rear - 4.4" 26" Fat bike - love it - built for extreme hill climbing!
Awesome 👌 That's roughly the same gear ratio as here.
@@HighVoltageKits If your rear gear is small enough - you can use the "Shimano Alfine CT-S500 Alfine Dual Pulley Chain Tensioner" instead of the derailleur, I did initially use my derailleur as a tensioner bur felt it was unsafe with the sloppy position (some wire wrapped to pull the D to the right position).
What is the top speed you're getting on 28t-36t? Are u 52v or 72v?
@@Jujubees225 72v - no idea on the top speed, I travel on canal paths and untidy cycle routes - so speed is not a thing for me - so I'm usually 15-20mph, but I think I've been 30mph+ on a short test messing with field weakening e.t.c. I think it could hit 40mph no problem at all.
Bravo Maestro...
Cheers Joe
High voltage for BBSHD is 72V. But still it's a beast, can't wait to receive mine kit to install on my Cube Analog
For sure. It's High Voltage cause it's our channel lol. Hope you enjoy the kit! We will try 72 volts once the drive train is sorted out 100%
@@HighVoltageKits I tried to compare this to CYC proton on your video, seemed it struggled a lot on up hills. didn't it?
Local seller had an Intense downhill for sale. I brought my 52v battery with me while looking at it. The Rockshox Boxxers on it still weren’t long enough for front wheel clearance. I’m going another route.
Damn. At least they have good resale value
Hv bbshd, would say, is more like a mini Sur Ron that likes to stay in the bigger cog closest to the size of the chainring (1:1), and the cyc motors like to be shifted to maintain efficiency? A mini Sur Ron with pedals is pretty cool hahaha.
It's pretty good fun and much easier to transport as well.
sounds nearly silent, great smooth gear changes to ,awesome
Its single speed i believe
Correct. But very quiet!
@@HighVoltageKits yes mine is quite as well make a little more noise with 72v from the 52v i was running before
@@HighVoltageKitsSo far judging by random videos and in person original BBSHD trapezoid waveform controller seems to be even more silent producing just a soft whirring sound compared to FOC sine wave which is supposed to be quieter. Hard to confirm but this one have higher pitched noise even when taking off at lower RPM's.
@@sketchysticks1127do these mid drive motors mind single speed?
Hi friend, I am always impressed with the propulsion of your vehicles. This is another prototype. I can never understand, does it depend on the motor or the battery or is it a combination of factors?
Were you pedaling or was it just propulsion?
Impressive brakes.
I absolutely have to solve, even if I carry a trailer of 50 kg, it is not possible that I can only do 30 km even without a trailer. There is something absurd about my engine, my battery.
👍💯❤️
Yeah we need to figure it out.
Thanks a lot for the great content really helpful. Tho each video you release makes it harder to choose motor between photon/pro or bafang
Photon for torque sensor if you wanna ride a bicycle. If you want a throttle style go bafang (from research not experience)
It very much depends on your riding style. There are some new motors coming out end of April as well.
Seems like Specialized made loads of different BigHits around 2005 ish..
Mine is 26" front 24" rear wheels, adjustable rear link + BBS02B 48v 1.2KW
Best possession I own hands down.
They are a brilliant frame design.
You know... You can probably get away with using a gates belt drive on this bike using a mid mount tensioner. Either or epic build.
Not a bad idea. Cheers
That is one sexy fun lookin' bike mate 👌
Cheers mate! Appreciated
That chonky boy needs some heavy off-road action, would love to have a bike with as thick tyres as that and my old fox talas on my old Marin attack aren’t as beefy as those triple crown forks (they really need a service too) and my battery in the back pack doesn’t help with the weight distribution being all over the back end. That bike isn’t meant for the streets it’s meant for the dirt of a rugged old field side track lol and my tsdz2 leaves a lot to be desired power wise, but I do like the torque sensor that your lacking here. Though I haven’t ever tried a non torque sensing bike before tbh
Yeah. We will be going out in the bush for sure. There will some new motor options out shortly in both the tsdz2 and bbshd size and style. We are starting to put some information up on our Discord.
I don't have an HV kit(YET, saving.), but this reminds me of my own bike in a lot of ways even though it is nothing like mine it rides similar to mine but with better acceleration and generally looks at least 25% safer than what I ride. The only thing I like about my bike is it has gears so that would let me put off some maintenance for longer. Really beautiful build to be honest those 24 in tires have just the right thickness to still let you fly left or right as much as you'd like I'd bet! - With everything on it (sans the rider) what's the total weight of this bike? It's impressive!
Thanks for the kind words. Look forward to welcoming you to the HV family. I think about 60lbs with the battery. I need a scale cause I'm always asked this one.
I sure wish there was a clear cut way to purchase a system upgrade like this for my bbshd.
There is. We sell this exact upgrade kit. Its our design. If you email greg@highvoltagekits.com we can set you up. You will also get full build support for both the kit and your bike through our discord server. There is a link to the kit in the description of the video. Its always listed out of stock because each one is custom made to order and we need to ensure it will work for you. There is also a link to join our discord. Cheers
At 24" that thing must be a ripper!
My 29+ 52vHV can be a handful at times. I can only imagine 24*
They are very nice i have 05 bighit on 72v awesome torque with 24" but a little slow 60kph need to test some more settings think i can get it to 65 which would be ok with some more field weakening have it set to 25% and 30A gonna bump it up to 40A and 30%
My little folding carbon bike with a BBS02 running 52V @ 1280 watts went 36mph/57kph on a pure flat road , throttle only. With 20inch/457mm tires/rims.
You should be getting faster then me my simply running an 9-11 tooth rear small cog cassette and a 52t front or bigger.
I've seen 9 teeth cogs as well.
I have to run the chain line directly over the 11 tooth cog on my 7 speed cassette to keep it from slipping. Now none of the cogs slip under full throttle.
@@TheAgentAssassin running that smal rear cog will mess up the motor fast and the acceleration would be terrible sry not for me i want a torquey offroadbike just need 7kph more which i should be able to get by adding more field weakening
Let's just say if I could wheelie worth a damn it would have been very easy to.
@@HighVoltageKits so fun! Yet so scary!
I keep practicing but it still humbles me...
It's great to see an update on the Big Hit. It looks like an 04-05 frame? I have an 06 Big Hit and it's different. My downtube is a square shape as opposed to round and came with a 26" rear end. Along with other frame differences. How many amps are you running this 52v setup at in the video? What gear is in the motor? PEEK? It would be cool to see a vid of this bike thrashing through some offroad singletrack stuff with ups and downs and to know how smooth the on/off power delivery is over tricky terrain.
You are probably right on the frame. It's the Nylon right now as the PEEK is being looked at for replication. Looking forward to offroad once the chain skip is fixed. We need the battery as well.
@@HighVoltageKits yes someone else needs to make the PEEK as they've been unavailable forever now
We should info soon. Luna said two months but that answer is getting old.
Yeah the first gen bighit was a mullet with a 26 front 24 rear. I went with a 24 front to take some rake out of it and drop the front for seated riding.
@@enlashok it's easier to find good quality 26" DH tires than it is 24" these days.
im so new to this whole thing, I dont even know what a BBSHD is - but let me ask you - is it basically a older cheap downhill bike found readily on the used market, and converted to electric? are they generally always mid drive? are hub motors ever used? im doing this. thanks for the awesome channel!
Hey Sean. Its a bike that was owned more than bought but yeah you can get these cheap for sure. The parts need upgrading often but its a good way to have control and get just what you need. You can definitely use a hub motor although they tend to be less effective hill climbing and when fixing say flat tires etc. They are simpler and quieter to operate though so advantages as well. The BBSHD here has been modified to run at this kind of speed and power. They are not normally like this. Glad you like the channel. We also have a good community on Discord which you are welcome to join and post questions as well as learn more about ebikes. The links are in the description. Cheers
@@HighVoltageKits Awesome man thanks. i will join the Discord - I think i have a suitable frame. its a 2003 norco VPS launch. it has a 68mm/113 bottom bracket with english thred. that should work ok ?
Sounds awesome. Post some pics!
What's the watts/ amps ur using here? Looks good n fun!!
About 3000 watts. 100 phase
Awsome kit you sell, although i honestly am struggling to understand why it is over double the price of a phaserunner when it is essentialy almost the same or am i wrong?
Because that's just the cost for the controller. You the need to buy a display..This link is the only one that works with it and is $100+ and is very dated. We use the eggrider. You have to buy a wiring loom. You need to learn how to program it. Ours is a plug and play kit with full support. Once you buy everything from Grin the price is much closer. Once you factor in your time and the support you get from us it starts to look like very good value. I should do a video on this. ebikes.ca/ca3-dps-n-bracket.html
Found it.
I really want to build a bike to do tight single track with big hill climbs here in Australia (where it gets upwards of 35°c regularly). It would appear a bbshd would be the go. I'm not interested in going faster than 50km/hr at the most and would rather have a larger pedal assisted range instead. With this in mind would a 52v or 72v battery be better? Which is better for making torque?
Are you planning on peddling the bike for exercise?
Yep, definitely. Exercise is the plan but I'm pretty time poor and the singles are 15km away on a dirt road so being able to cover that distance at a reasonable 40km/hr.
one more thing what option would you choose between cyc pro and bbshd with asi 855 regarding speed torque hill climbing ? cheers
For me I would take the BBSHD as you can just single gear it. Kind of depends on the riding style you want. There is a much larger rpm range you can hit with the bbshd. If you want to peddle then the cyc has a better sensor and feel.
@@HighVoltageKits thank you for your reply
Wow this looks awesome. How fast was the top speed?
About 60 I think. Need to sort the GPS out.
Dang impressive. Is the 52v battery rated at 70 amps continuous?
Its about 450 amps continuous. Not a typo. The cells are really High discharge lipo. Not practical but a good test battery as I can reconfigure the Voltages easily.
@@HighVoltageKits what is the continuous nominal power and peak watt power on your kit?
Peak it's 4000 watts at 72 volts. You can't pull that all the time. It's a modified kit so it's not been assigned a constant rating. If you hit it hard up hills etc it will heat up but not as fast as you would think. It depends on alot of things like gearing, bike and rider weight. On a 40C day in the summer I have backed off a bit to be safe. We have thermal rollback to help prevent damage.
which one is faster mate BBHD or Photon unrestricted 2000w both with save battery 52 and on same bike ? love your videos and thanx in advance
The Photon will be faster unrestricted in that scenario against a stock BBSHD. You need to modify a bbshd to really get it shifting.
@@HighVoltageKits thanks a lot 🙏 you only one on internal who tested it unrestricted that i could find . I was hoping its a Photon ,coz weight is a big deal plus newer technology
I love it
Hello, what would you say the performance boost would be from a stock bbshd? I'm running a 48v 13ah battery and is already plenty of power and so much fun, but am looking for a bit more power. Would you say its enough power to stay with a bbshd? Or save up for something like a Talaria xXx or Surron? 🙏
You would need at 52 or better yet, a 72-volt battery to get the most from upgrading. At 72 volts, it's got more pep than a stock Sur Ron. The advantage with this is that it's still a bike, and you can restrict it to 750 watts and be legal and look legal. Sur Ron's are tending to get targeted more and more these days. It depends really on what riding you plan on doing. There are lots of videos in the channel videos that will give you an idea of the speeds and acceleration you can expect.
@@HighVoltageKits Ok thanks. Do you happen to know any good "Cheaper" 52v batteries? I don't really want to spend an insane amount of money.
Is the chain skip not because your asking a lot of torque out of it with such a mid range gear with so much power? I feel like it would very quickly wear out (chain stretching primarily but leading to gear wear) I’d be inclined to use the beefiest chain I could fit (not sure what chain your are using tho tbh)
Asking a lot - when it’s pointing up hill from a standstill or just a decent length sharp incline
We have a few theories. It's under heavy load so up hills and less with me cause I'm lighter. It might be the chain is too long. We added links. Might be the b screw. Might also be the chain type not working the the narrow wide. If we are very unlucky it might be the hub is too week and it's the pawls slipping.
@@HighVoltageKits what hub you using? That could very well be it
I'd have to check. Away for Easter here. We will eliminate possibles!
@@HighVoltageKits less pawls normally
Means bigger pawls which means more engagement with larger gears. The louder ones usually, like hope hubs. And, you can also get modified hubs with ‘out of phase’ pawls, so there’s less chance of being between teeth when you try to engage the drive (as one pawl is engaging the pawls not directly opposite (90 degrees for a 4 pawl hub) are between teeth, so the time between engagement points is halved, giving you more reliable engagement)
I have the same setup as motor, battery, and controller. Can I run a 72V battery with the nylon gear?
Yeah. The Nylon will be fine if you gear it right and let the motor spin.
where did you get the rear chain ring adapter
I had it made. Working on having some more done.
@@HighVoltageKits Any notes on getting it fabiracted or is it pretty straight forward
What was the outcome for this bikes battery? What did you settle on?
It’s being built right now. Underframe. Hopefully an update pretty soon
hi mr voltage do you have a link for the split pack bags ? cheers
It was from West Coast electric bikes and was called the Magnum. It's not made anymore, though. If you find a link to another please post it.
@@HighVoltageKits thank you
If its single speed is there any reason why won't just switch to motorbike chains and sprockets? More weight? Probably not that big a deal also its low down so handling shouldn't be affected all that much.
Its less weight and more complexity. You would likely need adapters for the sprockets to go from Bike to Motorbike. Tensioning the chain as well would need a customer solution unless dropouts were horizontal. Doable yes. You would have to be pretty dedicated and willing to put the time in. So for most builds its easier to just use 6 spd chain and beefy stuff.
You reckon this setup won't keep up with the photon?
At 72 volts the Photon won't stand much of a chance but the Photon is an ebike. This is a Stealth dirt bike effectively.
OK awesome build I've got a big hit as well here in Canada and can u please tell me or link me what motor u used and spacer? I'd actually like to know what I can use to build mine and I'll modify the speed and go faster stuff later but want to start with the motor and drive set up first any links to site I need for my bottom bracket is appreciated I'd like to order it asap!wow I'm very impressed with what you have done and these really are sweet bikes! Thank you so much for the inspiration love this !
The motor is the bbshd. I think it's the 68-83mm bb version. The spacers I 3d printed from polycarbonate. You are welcome on our Discord server to get build help.
Do you ever have overheating issues ?
It's something to monitor but geared correctly our thermal rollback should protect the motor. It was about 45C after the climb.
How does it perform single speed with pas?
Its pretty slow with PAS. Its basically a stealth dirt bike. You can use it for gentle cruising about but its not really setup for pedal assist riding.
@@HighVoltageKits when I pas cruise, I’m only going 20-30mph max speed. I’ll probably go with the shimano linkglide 9 or 10 speed. I think it should be fine for that because it’s for a bit of exercise. I can do that now with the stock setup. But it will also be a mini surron when it wants to be. I’m hoping to get in contact with you to purchase a hv upgrade, but I’ll be using a 52v 20ah 60a bms 50s cell battery for the time being. Thank you for taking the time to reply to me.
You are most welcome. Our Discord is the best place to chat. Links are in the description
Nice !!Do anyone know where to buy 52v high power Batterys for the bac 855 electroncycles do not ship to Europe enymore 😢
I think there are many builders in eu i found 3people here in sweden in under 1month dont know if they ship batteries tho
@@sketchysticks1127 Sverige passar bra 😁 har du någon firma du vet av ? Och tack för svaren
Men även boxbike och batbike säljer batterier tror dock boxbike ligger i danmark
@@sketchysticks1127 tusen tack ska kolla in dem
Golden motor ship worldwide.
Will this kit work for Can bus M620 motor?
We are struggling to crack the canbus for the torque sensor. The throttle is no problem
Is there any interest from others in kits for the bafang canbus motors?
I was wondering 🤔 does the pedal assist/torque sensor in the kits you produce work?
The cadence PAS will work but not the torque sensor part as its locked by the CANBUS protocol. We looked at doing a kit for the UART version but its a hard motor to get it reliable for.
So what is the message here? I think the BBSHD is still the king and not one can knock it off the hill. Well, who?
Depends how u look at it, price to performance, pretty clear winner - bbshd. But it has no torque sensing so it’s more ‘moto with pedals’.. if money is no worry, then cyc is clear winner imo (for strap on kits) or m620 frame fitted (see Andy Kirbys bike, forget what he calls it)
@@Sam3532 Perhaps, I couldn't stand listening to the cyc on my 4 hour weekend rides though. That would ruin the serenity out in nature. I'll check out Kirbys but I'm guessing it's too expensive for most.
I think the message is it's still a rock solid option that can do a range of roles from utility bike to touring to a souped up hotrod that you can use like a Stealth dirtbike.
Well done. Only counterpoint is....
I have a couple of BBSHD bikes with stock 30a controller and 52v 20amp-hr batteries with good high discharge cells.
Both with do low 30 mph pretty easily and can hit mid 30's on a sustained stretch.
No field weakening, lower RPM, taller gear ratio and less noise as a result. No they won't climb like your bike.
And if I wanted I could go 60v with stock controller and more speed.
So, my view on this is...unless you want to get into the 40 mph+ speed range aka CYC Pro bandwidth aka 72v or 84v battery, I don't see the point. No my bikes won't climb like yours in this config because you are pushing more watts and higher RPM but also as you know, higher RPM renders pedaling irrelevant.
I would appreciate if you figuratively draw a line in the sand for your viewership....when the HV kit really starts to separate itself from stock BBSHD config with a 52v batttery. For example, maybe you believe, the HV kit really comes into its own with a 72v battery. You have more experience with these bikes than anybody. Perhaps you believe the HV kit is worth it with a 52v battery and the difference, just isn't coming through the video screen. But for the speeds you are riding, a stock BBSHD can pretty much keep up or not too far behind....so it 'seems'.
OMO.
Thanks for all your R&D.
My little folding carbon bike did 36mph on a flat road throttle only with a BBS02 with 52V and 1280 watts.
The gearing for my top speed with 20 inch tires/rims was a 52T front ring (lekkie) and an 11 tooth rear cog.
If I could find a 9 tooth I might get closer to 40mph.
That's with a 20 inch folding bike.
It also climbing hills like a billy goat. I had a 34 rear large cog in the 7 speed cassette.
You miss out on the power band across such a wide rpm range that a FOC controller gives you
Good comment. The main difference at 52 volts is the torque and acceleration. You can absolutely hit 30-35 stock. It just takes a while to get there. The gains are more marginal definitely. I dunno how easy to draw a line in the sand as there are so many different bikes and frames. The ASI controllers are significantly smoother in terms of throttle and overall control. You can hit a higher speed in a lower sprocket. Really it comes down to how you want to ride.
@@HighVoltageKits Thanks again for all you do to raise the bar for those of us that like high power ebikes.
@@TheAgentAssassin John actually obliquely addressed this point. Your little folding ebike as it turns out is pretty efficient in terms of weight and aero profile. It punches a pretty small hole in the wind and one of the reasons its so fast with 1280 watts. As mentioned, I have two BBSHD bikes and one is a drop bar road bike with 28c tires. I in fact use it for training with elite cyclists...no motor in my town who are freakishly fast without a motor. They are my friends. My e-roadbike is faster than my Cannondale 29er with same driveline. It is both more aero, lower weight and thinner tires have less rolling resistance than the 29er which is more upright with me on it as I am tallish. So the frame and tires matter in the equation of power and need for more watts for sure and gearing you reference with the smaller wheels matters for sure as well. An equation of sorts.
Bbshd has got me doubting my m620 purchase.
Not a fair comparison really since bbshd is PAS and m620 is torque sensing, if you like cycling always go torque sensing, my personal preference, as it feels like cycling but with a boost to your legs power output.
If you like moto style (but with pedals nd not pegs.. weird imo, tho I haven’t tried PAS) then go bbshd
I think you will enjoy it. We have an upgrade kit for the M620 in the works still. It's a harder one to get right.
Ahh I see I’m not to sure what field weakening is yet, but it will be paired with an asi855 72v I’m just less than 9 stone so not at all heavy… have you got instagram or a Facebook? Regards Josh
I think you messages the Facebook page. It's easier to communicate on our Discord. I'll load up the messages later. Field weakening allows for a higher top rpm with a DC motor.