A bit of info please (savage conversion) - Page 2 - RC-Monster Forums

Nixpus · 05.27.2009, 11:51 AM

A little more $ will always get you a notch up in performance... the only problem is that there seems to be no end to the amount of notches you can go up.

I think I'll have to go the completely other way grab one of those hobbycity motors. Slightly bummed that the 36XL cans only are available as 1100 or 1900 KV... would have liked something in between.

lincpimp · 05.27.2009, 01:54 PM

Quote:

Originally Posted by Nixpus

A little more $ will always get you a notch up in performance... the only problem is that there seems to be no end to the amount of notches you can go up.

I think I'll have to go the completely other way grab one of those hobbycity motors. Slightly bummed that the 36XL cans only are available as 1100 or 1900 KV... would have liked something in between.

The KD36 motors are junk. Waste of time and money. You might as well buy a brushed motor, it will last longer.

Nixpus · 05.27.2009, 02:17 PM

Arg :)

And the fat ones? KB45 08XL should have a nice RPM @ 22,2volt ~ 35-36.000ish... but then Im back at the low CoG issue as it wont fit in between! Merde ;)

nitrostarter · 05.27.2009, 02:43 PM

The KB45 motors aren't bad for the price, and they are little powerhouses. But the KD36 motors are garbage.

Nixpus · 05.27.2009, 03:17 PM

Cheers!

KB it is then! Any opinion on the motor choice? Im thinking the 12L 1400KV will be more than enough... but the 08XL 1600KV is teasing my inner power junkie.

lincpimp · 05.27.2009, 03:19 PM

Go with the 8xl, it will stay cooler due to the longer can and more torque. Either will require good lipos, 25-30c min with 5000mah min. Something like the flightmax zippies would be a good inexpensive option. I ran the L can KB motors in my gtp conversion and they did fine, but I am sure your savage will be heavier and have more wheel/tire weight.

Nixpus · 03:47 PM

Thanks again-again guys :)

Any idea what these alu bulk heads are? And did I read something about shimming somewhere?

EDIT: If I hold the diff by the shafts there are some play when I pull them apart push them in. Is that what I should get rid of?

onetoo3 · 05.28.2009, 06:45 PM

hi just some questions for you
i have the savage21 i want to convert to flm
i got the flux tranny and 52t spur form my 21
going to use mmm 2200kv combo just need help with spur & pinion
thanks
and i must say that my 21 was just in storage. than i found rc-monster.
next i am getting flm parts in the mail........i think we know the rest....
thanks guys

Nixpus · 05.29.2009, 06:57 AM

Just got word that the 4465 will arrive in a new and improved version next monday... Now I have 2 motors en route.

Regarding gearing of a Flux tranny with the mmm 2200 KV combo... look at the flux and get the same gear ratio.

Regarding gearing of the 4465 and KB45-08XL... I take it I cant go totally wrong if I aim at around 45 mph and take it from there.

nitrostarter · 05.29.2009, 10:42 AM

45mph should be fine on those motors. No problems, just watch your temps if you want to gear for more.

Nixpus · **Worn bits :) -** 06.30.2009, 04:49 AM

Mkay... got the 4465 motor and 150a ESC installed. Pictures later when my colleagues have left the lab

For now I only have pictures of the worn parts.

The spur gear wasnt uber tight when I made the 1st test run. 44.000rpm will do that to a spur gear in 1½ minute!

After swapping the gear and tightening the slipper fully... the hex shape of the wheel stopped being hex shaped... its round now... time to play with epoxy!!

Nixpus · **E-Sav v1 -** 07.03.2009, 11:34 AM

Ok... hex hubs epoxyed into the rim.

This guy does standing back flips and wheelies at crazy speeds... Guess HW was right when they claimed the C4 combo to be crazy powerfull

It is currently in a version 1 state... it can drive but the motor mount + bat trays are plastic.

Hope this works.

Nixpus E-Savage v1:

Mortor mount v1:

ESC + motor mount:

Question time...

What is the strongest diff I can put into this guy? The one thats in there is quite tight and favours one of the wheels over the other.

Whats the best wheelie bar out there?

What type of slipper should I put into this guy? The standard either slips all the time (and then the plastic spur gear melts) or I tighten it all the way and it doesnt slip at all (at least I cant tell that it does)

What kind of wheels baloon less? The standard tyres I have atm is double size at top speed. And one of them is about to leave the rim. So even tho Ive used the calculator to gear for 45MPH... its much faster due to balooooooning.

I'll do a serious attempt at mounting the motor below the spur... its gotta be possible!! Will have to remove the motor mount of course. But I can make some other construction to stiffen the TVPs.

Nixpus · 07.05.2009, 03:47 PM

Found a set of XL wheels with 17mm hex and all for 70$ delivered to my doorstep. Hope those guys will be a tad more durable than the old ones.

Nixpus · 07.09.2009, 03:42 AM

Battery trays made out of a stiff plastic box wasn't that sexy... but they got it up and running.

Time for battery tray v2. Found a stick of U shaped aluminium. Made a cut out in each end and bend them. tadaa... battery tray!

Added a strip of velcro to the bottom of the tray and the bat. will have 2 velcro straps around each tray. The straps are from lab top PSU's... they are used in order to manage the cable length.

Made a plastic insert in each tray. This way I can use standard hex screws. The "head" of the screws is sitting slightly lower than the edge of the plastic insert. Battery safe from harm... at least they wont get damaged by the screws ;)

Placed them at the front of the sav... should be ok balanced once motor + ESC is installed in the back.

Nixpus · 07.09.2009, 04:06 AM

Motor mount v2!

Who said you cant place a 44 can under the spur gear in a standard savage?

Found a sheet of 2mm stainless steel. Bend it into a U shape that fit inside the TVPs. Did a few test bends in order to get the right fit. Made a slot in each side. The gear mesh will be adjusted by moving the mount up and down.

Metal bend into shape:

Cut out in order to make maximum room for drive & spur axle:

Here you can see the slot. Placed a washer on each side of the mount - it slides quite neatly. I dont have a ton of adjustability... but I can gear this guy from 40-55ish MPH with a 47t spur (not counting ballooning in).

Photo taken from the top.

I had to grind away a little of the center gear box - The area where the top screw from the disc brakes were inserted. Other than that the opperation was pretty painless... the hardest part was drilling in the titanium TVPS. I increased the screw size at the mount from M3 to M4.