Baja 5b Conversion "Prep Work"
 

Been thinking about this idea from the very start of my save for a 5b. I should be able to finally purchase it this weekend or next week sometime. Ive seen my friends 27cc grizzly run and its a beast for sure. Only problem is that my neighbors hate the extremely loud setup he has. "Xcan pipe with 27cc engine". Im looking to possibly convert my 5b. I have the Sentileon 100a HV ESC set to order whenever I get around to ordering the 5b and I also have my mind set on The white lipo packs from UH that have are 5s 4800mah 25c-35c. I plan on running two in series. That should be enough for that but Im stuck on a motor.

Heres what I had in mind...
http://i301.photobucket.com/albums/n...CU/motor-2.jpg

Keep in mind that a normal max rpm range for 23cc-28cc 2stroke gas is 10k rpms. The outrunner has 250kv. Take 250kv x 37volt nominal and you get 9250 max rpms. Plus this motor has a 50-70cc 2stroke gas equivalency which should be plenty of power. :yipi:

So the setup will be...

ESC- Sentileon 100a HV
Battery- Two 4800mah 25-35c 5s Lipo's
Motor- HXT 80-85a 250kv Outrunner


What do you guys think.:wink:

i tried to tell you, now you listen
:D


put the order in for my Monster max

Im not 100% sure yet ben. Have you ever driven a 1/5 gas? Its an adrenalin rush for sure.

I doubt I'll do the conversion because I've still got the matrix to finish but this is just an idea if I get fed up with gas which I doubt I will. Ive ran a 1/5 27cc XTM grizzly and its really a cool experience. Can run up to 45mins on a single tank of gas and you never have to wait to run it. I think Im going to do my Matrix TR FRE instead right now. Converting the 5b isnt a need and converting the Matrix is.

Sweet cant wait to see this done. I think that setup will do fine in there. That is one power packing motor

If I can get enough people intersted in this build I may just do it for the hell of it seeing that you guys are interested in it. I am a little more intersted in finishing my Matrix conversion first though. :yes:

I vote for the 5b. Theres enough of everything else. Theres one other BL 5B here I think

http://www.castlespecialprojects.com/csp_90_volts.html

take 200 amp and you goood to go!!:whistle:

I'm thinking to build a E-baja to, but I haven't got enough money yet. Some one here on the forum already has a E-Baja, and someone is building one ( With Mike ).

Look here: http://fastestrc.blogspot.com/search/label/baja
He has a NEU Motor, and also on this forum.

Good luck!

takedown i am really interested in a 5b convert. I would do one myself but lack funds. As soon as i get a god chunk of cash though the gas 5b will at least be purchased then i will convert it when another chunk of cash comes along.

Hmmm... When I buy the 5b either on monday/tuesday or wednesday this week Ill see if I can put an order on the motor and the ESC. That way I will not be able to change my mind on this seeing that Ill try to many times.:wink: I still have to see what Im gojng to use for a motor mount. Im thinking .50in tempered plexiglass 12x12 sheet off ebay for $20. The main think Im worried about is the burst current draw from the giant outrunner. If I gear it just right hopefully it wont try to draw more than 150a cont otherwise my lipos are screwed... If you guys have any suggestions please let me know. :yes:

Ok I think Ive made up my mind on this. I will order the Sentieon 100a HV ESC along with this outrunner... The reason I want this one over the bigger purple one is that its half the cost and has a better quality rating.

http://i301.photobucket.com/albums/n...CU/motor-3.jpg

Its a little less power but in my opinion on 10s it will be plenty for my likings.

is there even such a thing as tempered plexiglass?

why not the 80-100

I've always thought that outrunners aren't as efficient as inrunners, or am I mistaken?

I call it tempered plexiglass because it doesnt shatter as easily as normal plexiglass does meaning it has some flex.

Sleebus- Outrunners in general are more efficient than inrunners.

Having 2nd thoughts again. Winter is basically 6.5months out of the year here. I would love to be able to run it in snow but the conversion would hold me back... We got a record snowfall last year and has atleast 2ft of snow on the ground all winter. The streets were always glazed over with ice if not packed snow... Heres a vid of my evader during one of the many heavy snowfalls of last year- http://www.youtube.com/watch?v=rWne3eqiUZc

i would like to be able to run in this but converting would hold me back...

I think Ill save this project for after winter seeing that I would not like to ruin anything running threw the snow.

Ahh this is really bothering me! I think I should order the motor/esc for the hell of it. Ill have it converted until winter and then its back to gas until spring.

New idea! Ben brought up the idea of using dual ESC's to soak up the enormous shock of the outrunner. I am probably going to run dual 100a HV ESC's from bidproduct that can handle 10s each. I will run the two 5s lipos in series to make 10s lipo and then run them in parrallel to both esc's. The ESC's will be ran in parallel to the giant outrunner. Kind of a complicated setup but I hope this works.

Sounds great. Why not waterproof it and drive in the snow?

Heat issues are what im worried about...

That 200 kv motor says it's only rated for 8s max. Didn't know if you missed that since you said you want to run 10s.

I say keep it gas. Real cars are gas :).

This might have been gone over at some point on this forum. If I recall correctly, this won't work since the two brains boards would need to be synchronized with each other so they fire the correct phase at exactly the same time. But since that's not possible without extensive modifications, there's a good chance they would fry each other.

but wouldnt they switch in time because they are seeing the same EMF?

Do you really think you'll need to worry about temps in the snow?
That would be the least of my concerns.. I'd be worried about shorting something out and ruining it.

Problem is if they don't. You could easily have a short from one controller to the other.

im with supra, i had a 5b when they first came out. after i figured out how to keep the clutch bell attached( defective bolt from factory) it was a blast to drive. then,i realized, im driving around a 3 foot long 25lb weapon with 2 wheel drive. the gas motor with a pipe was motor than enough power. by going electric ur just asking for a disaster. and when it crashes ( cause it does, and hard ) ur not costing urself 500 in bats, 200 in motor, 300? in speedos.

And it's likely they wouldn't. No two pieces of electronic equipment are made exactly the same due to tolerances in manufacturing.

I also had one right when they came out, and my clutch also had a defective bolt. Wonder if this happened to a lot of people.. :whistle:

Do it!!! - If you want to run in the snow then get a set of these!

http://www.davesmotors.com/store/media/tt804ski.jpg

That baja looks wicked...now picture it with no engine airbreather gas tank or pipe...and a 1/5 scale driver sitting in a bucket seat with steering wheel and window nets.

This is one hell of a 5B.... Now, I regret not buying it....on a second thought there is no snow from where I live :lol:

hi

very weired such threads where people change their mind at minute cycle.
a good zenoah is not doing 10'000 rpm but rather around 18-20'000 rpm.
with an electric conversion i would try to target at least this range or a bit higher.

i still doubt that those open outrunners will do well in real offroad conditions for a longer time.

as for the motor i would look at the 30er series lehners, the big neu or the plettenberg bolido.

as for the esc i would go as big as you can.

i drive large scale models for quite some time now. eventhough i am mostly an electric guy i am still reluctant with converting one of the big cars. those gas engines are not much maintenance and you get great runtimes cool sound etc etc. for me personally it seemed much less necessary to convert those large scalers compared to the nitro 8th scale screamers. however i see that i may be fun seeing a large scale electric and the building itself is sure fun too.

bye
rhylsadar

The outrunner conversion has been done and tested before in offroad conditions. As long as you run a dust guard on the back of the outrunner somewere you should be fine for a few runs. Then you'll have to clean it out. And yes I do change my mind quite often. :yes: Im not looking to spend $500 on a motor. I am just looking for a basic setup... Hey guys I just had another idea. You think a KB45 17xl on 8s would do? If I recall its 700kv. So 700kv x 29.6v nominal = 20720 max kv.

But then again Im still having 2nd thoughts... "What if the project doesnt turn out the way I planned?"... Those kind of questions are flying threw my head right now. If I dont convert it then I coulda just stick that money into my matrix.

get the 5b and a loud pipe, the neighbors will live, leave 'er stock and convert the matrix. Oh, and don't own more than one brand of cereal at a time. If you had to choose your breakfast you'd never leave home:lol:

......on the one hand I love raisins, but they're not magically delicious or grrrrreat...............

Someone took their happy pill this morning.:mdr:

I think it's a great idea, my grandpa has a Baja 5b and whenever I drive it it is awesome. You do get an adrenaline rush.

I think Im going to put off the conversion until spring though seeing that old man winter is coming in a hurry...

Man it is still blazin summer here, also I got to skip the first day of school, tomorrow too, and maybe wednesday, because of this tropical storm Fay, lol I live in broward county..right now we have a tornado warning, flood watch, tropical storm force winds warning, tropical storm warning, and hurricane watch..what a nice week its going to be eh?