hyper 8 conversion
 

i just got a used hyper 8 today, it's very dirty, but i will clean it up. i'm mostly gonna bash no racing for me. well here's the set up that i might use.

car-hyper 8
motor-medusa afterburner 2200kv
esc-mamba max w/ fan
radio system- futaba 2ph fm
batteries-a123 4s 2200mah
body- idk

any suggestions would be appreciated.

i will post pics after i clean it up.

i dunno, maybe a plastic spur (u will need shims to do this) and more voltage OR a higher kv motor... i havent recieved my motor, but i ordered a 2550kv neu. this will give me the ability to add another 2 cells in parallel (and then wire into series) to give me 5s2p... im going to run 4s2p, and with less than 6 or 7s id suggest you do 2p too... its just NOT enough amps... or runtime!! 600g is comarable to those running 8K maxamps packs. its less than 100g more than the typical lipo setup anyway :)


u will also need a mount of some sort, either make your own or buy the hyper mount... have a look at my build and see if you will have the same issues as me. shouldnt do as i think its a direct fit :)

hope this helps...
ryan

I agree with tc3_racer_001, 1p simply will not be enough. 4s2p will be kinda awdward to fit onto the chassis and have clearance from the body, though.

well ill think of something, im probably not going lipo though

pics
 

well im running into troubles, first i can't get the engine mount to budge.
anyways here are the pics.
i need to fix the diff mounts and dremel them off cuz the screws are stripped.
http://i182.photobucket.com/albums/x...Picture067.jpg
http://i182.photobucket.com/albums/x...Picture068.jpg
http://i182.photobucket.com/albums/x...Picture069.jpg

IIRC, my motor mount was difficult to remove too, but nothing a little bit of Kung-Fu grip couldn't solve!

Try some heat, then some wd40 and then use dremel to cut slot in screw and use flat heat screw driver...

Normally the heat from dremeling helps loosen it..

should i use the reinforced bit or the unreinforced?

get a lighter and heat up the screw, this will melt the locktight. then unscrew it quickly. i try to avoid cutting anything as i always screw it up lol... but its pretty clean. and yours doesnt have that pesky mount to deal with!! GRRR.. urs will be finished before mine. in regards to the body. im a good driver and ill never flip :whistle: :lol:

ill just not cut as much off and mount it higher that normal. shouldnt matter if i flip it as they are alloy cells and a small bump wont hurt them will it?? a123 7s would be ok on the MMM but nothing more and you would get away with (albeit short) amp draw requirements)

BTW: do you recon i could steal a hyper 8 diff brace and diff mount? if i could i would avoid all these issues!! hooray!:party:

If you flip your centerdiff by 180° your motor could be placed on the opposite side of your steering servo (front left). This way you would most likely have enough space to place 2 4s1p A123 packs in sidebyside config behind the center diff (giving you a well balanced buggy). With 4s2p A123 a 2200kv motor will rev up to 24000-26000rpm under load. With a somewhat bigger pinion you should be able to gear it for 40mph. A123 cells in 1p config are able of up to 100A but voltage can drop to 2.3V at this load. This gives you 230W peak per cell. With 8 A123 cells you will have around 2000W at your finger tip. Your limitation will be the Mamba max ESC which most likely is able of short peaks around 100-130A: up to 1400Watt (more then enough for a buggy).

Depending on the height of your body you might be able to fit 5s2p (humpback config 3+2 or 4+1) which would give you around 31000rpm under load.

well i got one mount off then my dremel died:no: well off to the charger:lol:

does any one know where to get a medusa afterburner 2200kv the cheapest?

is this motor overkill?
http://www.impaktrc.com/product_info...oducts_id=2683

its only 50mm long. the 2200 is 60mm long if i remember... however, if it were 60mm long it would be great!

people are running these in emaxxes and e savages... with great results (on the hot side) but in a buggy i wouldnt recommend it.

yeah im still goin with the 2200

I run the 60mm 1600kv v2 motor in my hyper8 on 6s lipo. Plenty of power, and it runs cool too. The 2200 should work fine for you.

hey does mike offer free shipping?

no but he only charges postage cost

ok guys, ive found the motor that i need now i need to find the battery. i know i said that i would get a123, but i don't know which set up i should go with. should i go with 2x 6.6 4600 mah, or get lipo. im not comfortable about lipo though. I have tons of EP cells, but thet are too heavy, so you see my delima

well, you share in my delima... ive decided to stack the packs ontop of each other, and put them over to one side. still not decided on mounting them but they will be held down velcro.

My two cents.
 

Don’t you really want to know what total height you have to work with first and then start to subtract from there to know what your starting point is. ??

Example:
my height is 50mm from the bottom of the chassis to the top of the lid.
my battery tray is 5mm
my battery strap is 6.2 mm
my battery wires under the strap is 4mm

I'm now left with a total free height of approx 44mm that I can allocate towards battery / lipo height. What is your total free height? and how tall are the 123 cells stacked up on each other?. I've found that on average a 5000mAH lipo works without shimming the lid. as for a 3s, 4s, 5s, etc, what can your ESC handle?.

Either way it's more money you'll be spending.. :whistle:

Nice build by the way..:yes:

well... i figured, im NOT getting lipo, unless its hardcased... which no 4s exist. dont bother trying to convince me to go with lipos as i just dont want to!!! :)

so, a123 was the next best option. then i needed a 2p setup... and i could have gone with 5s2p, which was my original plan....glad i didnt!!!

i got a great deal ($140 posted) on 2 4600 packs from a123racing... so that was 1/2 the price usually so i jumped on them. imo to go with a 2p setup for a buggy there are a few options. i dont really want to cut them apart and rearange them, and i want to use them in my TC3... which they fit in (well enough anyway!!). so that limits me to keeping the 2 seperate packs.


then another 2 options. one each side (great if i can figure out HOW!!) or 2 on one side, and esc, reciever, moto, bec and servo on the other.

then another 2 options!! either stack them in a brick, or offset them. as i could see no advantage for spreading them out (weight is still the same) and there is no room for putting them end to end...unfortunately.

so the only way (assuming i cannot get the batteries on seperate sides, (if i did, they would be hanging solely off the plastic guards, not sure how long they would survive. to counter this, i thought i could add an alloy (or steel) thin bar/s across the width, supporting the 2 guards... this has not been done before, and the leading edge would have to be bevelled obviously...

any more ideas guys? i will space the body off for sure... but we will see how i actually do this later... at the moment, it can work without a body for testing :P

were on the same page tc3_racer :lol:
anyways
for battery holders im thinking about doing this
http://www.rctech.net/forum/attachme...1&d=1209057144

BTW: thats not my e-revo

interesting.... i hadnt thought of that!! anged alloy with padding... with straps ive already got... and make a lip and replace the plastic skirts... im thinking of getting a mount done (want a NEW hyper mount?) exactly the same as brianG... which will allow EASY peasy battery placement!!! the esc could be placed somewhere, i dont worry about that :lol:

well after mike gets the medusa 36-50-2200kv in stock, im gonna buy the motor mount with it and start to find a battery. probably a 4s lipo or a123's

a123 will last longer (cycle wise) and wont bend and kill themselves if they fall out while showing off your back flipping skillz on the tripple :P

well im very fickle on choosing the right battery rite now, it's either lipo or a123.
first lipo has its advantages by being light and i only need one and for a123s they charge faster, and have longer cycle life. the disadvantages are that lipo can burst and needs more care than a123s, and the disadvantages of a123s is the weight and size.

well looks like im getting a123's if my dad lets me...............

damn, is your dad paying for this! my parents have not put one cent into my hobby.... and if i want to go to the track (20 minute drive) i have to help around the house for ages... o well. wonder what they will say when they get my report card in a few weeks...:whistle:

also, u can charge 2p a123's up to 30A safely, some even up to 50A... u just need an awesome cc/cv capable power supply, and then there is no need for more than one pack, as well as the fact they have awesome resell value... around $400-600 for most though :(

no he's not, he won't even let me buy stuff with my own money! and the only thing i need is batteries, but i have tons of ep's so he's making me use those but the're freakin heavy. he doesn't really get rc, and he's hard to convince, i had to let a guy at the track to talk to him into letting me get a mamba max, but i don't go to the track anymore. he bought me the car, servo, and radio system and everything else to get me into the hobby, but now i have so many things to sell and so much money to spend on the conversion, the money is just sitting in the bank waiting to be spent

well my power supply broke so now i need to get a new one.......
well im half way through the build i just need batteries, a motor mount, and the medusa2200
http://i279.photobucket.com/albums/k.../hyper8001.jpg
http://i279.photobucket.com/albums/k.../hyper8002.jpg
and i thought this was a neat way to mount a switch......
http://i279.photobucket.com/albums/k.../hyper8003.jpg

that esc mount doesnt look very strong at all.... perhaps trying to make one out of acrylic like someones i saw yesterday, or adding another prace or using thicker aluminium.

im in the process of making support beams.

hey guys what pinion should i get? im running the stock hyper 8 spur, i think its the 46t, im thinking about a 16t pinion

You can use BrianG's Speed Calculator to help you estimate it:
http://scriptasylum.com/rc_speed/_top_speed.html
16t pinion would net you about 43mph on 4s Lipo, which should work just fine.

ok guys i havent worked on this car for a while, but is a 36-50-1600 on 6s a123 overkill?
plus im working on a new esc mount and still waiting for mike to get some 2200s or
1600s in stock.

The 2200 will be more potent than the 1600. ImpaktRC has the medusa 36-60-1600 in stock. That should work very well for 6s a123.

alright im almost there, i've made a tougher esc mount, i convinced my dad to let me get some a123's, all i need is to get a medusa 1600, CC BEC, a123, power supply, and make a battery holder

ok guys, im gonna have to stop this conversion since im not gonna have time for it, so its on sale. pm me for prices or make an offer (plus not electronics included)

:( WHY! save it for a rainy da.y if you sell it your going to lose lots of money :whistle: