A bit of info please (savage conversion)
 

Hola amigos!

Been bashing with some colleagues during spring. They drive nitro savages and Ive been driving a brushless Tamiya buggy (Baldre). On flat ground Im faster and has better handling... but whos bashing on flat ground? As soon as we hit some rough off-road action Im left in the dust... and often with some broken parts! Ive lost count of the number of times Ive been told that batteries is what they use to start their nitro engines.

Now its time for a change!!

Ive bought a used savage chassis on e-bay & the eZrun 150a ESC + 2000KV motor combo.

I plan to lock the transmission in 1st gear (same as the flux gear ratio). In order to fit the motor in between the TVPs Id like to run with the smallest possible spur... but will the flux heavy duty spur fit the standard savage transmission (Id guess so but dont want to order it if it wont).

If/once the standard transmission break down Im guessing the easy route is to buy the flux transmission from a chop shop on e-bay... or?

Another question for the pros: What tooth count would you pick on the pinion with a 43t spur and a 2 speed tranny locked in 1st? With a 22,2volt setup and a 2000kv motor that is. Im not really looking for crazy top speeds...

Battery tray and motor mount will be home brewn... we have a really nice workshop at work :)

I did consider running this setup with 4 cells... but would I be able to trash the nitro guys (4.6) with the ezrun setup on 4 cells? 6 cells will most likely break gears and flip me on the lid.

some of the nitro savages i've seen that are built for speed runs have the flux spurs. if i were you, i'd just try the stock plastic 47t spur first. it's mod1 and pretty hard to strip.

i'd just go for 6s. 4s will move a savage pretty fast but 6s will blow you away. you can program the esc to have a lot of puch control to help prevent diff and tranny issues.

If you want to convert your tranny to the flux spec just get p/n 100905. It replaces the "spur" gears of the 2 speed with a single steel gear. The flux tranny has the same ratio as a std tranny locked in 1st, and the top and output shafts and gears are the same parts in both trannies. Plus that part number I gave is about 10 bucks, so it is super cheap.

I would go with 5s myself, good motor speed and more power than 4s.

The flux spur will fit, and will give you needed clearance if you plan to mount the motor flux-style below and to the right of the spur. If you plan to make something like the kershaw "high cg" mount then you can use the 47t spur with no issues.

Just did a few savage conversions so if you have any other questions ask away!

James

Thank you for the feedback guys :)

I really dont want to place the motor in the "hight cg" position. So I'll order a 43t flux spur. Do you think the eZrun motor with heatsink/fan can fit the TVP's in flux style? It is a slightly fat lady :mdr:

Good info about p/n 100905 - cheers!

Which ez run motor is it? The 36mm motors, or the big ole 44mm? You can take a cue from the flux and make a tvp for that side that has a "window" in it that will allow the motor to sit slightly outside of the tvp.

I did a savvy a while back (hv savage was the name of the thread, I think) and I managed to put a feigao lx can (36mm diameter motor) on a custom L bracket on the stock nitro engine plate and fit up to 18/47 gearing. That was with the stock tvps. It was a tight fit, but it worked well, I adjusted the mesh by sliding the L braket side to side as you would with the nitro engine.

Oi Kermit :)

Its the big 44... figured that if I should kick Nitro arse I might as well do it right. Guess it would have been viser to get a 36mm motor? :(

Or I could try to fit one of those Losi 8th center diffs... looks like an easy way to do the power transfer.

Ahh well... Im off for a weeks holiday... hope the HW combo has arrived once Im back... then I can see for myself whats possible and whats not :smile:

It does seem like I'll have a hard time fitting the fat HW motor with heatsink + fan in between the stock TVPs. Hmm... any reason why I cant add some spacers on each side of the tranny+front/rear diff housings? If I could move both TVPs 1cm "outwards" I should have enough room to make a tight fit... or?

Anyway... be back in a week with more questions or maybe some pictures of a fat Savage.

I saw someone make a fat savage before, looked ok. I would just make 1 tvp with a clearance window, but that would depend what tools you have at your disposal!

Back from holidays and I get the msg that HW has stopped all sales of the 4465 motor due to some internal error in it... bummer!

KD or KD motors seems to be junk... price/performance is likely ok tho ;)

So whats the cheap solution? Feigao? Or should I just bite the bullet and get a medusa 36-70/80? Kershawdesigns has Feigao, RC-Monster has Feigao...is it an ok motor at 22,2 volt? Thinking XL 8 or 9...

Don't waste your money on a feigao... Get the medusa 70 or 80, 1600kv is good for 6s lipo.

I would definitely skip the Feigao and get a Medusa or Neu. Better quality+ better overall performance...

http://www.impaktrc.com/product_info...oducts_id=2618
They are coming down in price.

If you go with 5s the castle Neu would be a great choice. They can be had for a little as 110 on ebay if you bid well. I see them go for 125-130 all day... You can also get a black one that way! Or get the flux motor, same thing.

There ya go. $110 is even cheaper than the Medusa, and quality and performance will be better!

That is what I paid for my flux motor, new. I have also seen the castle motors go for that too. Considering an xl feigao is 75+ throwing in an extra 30-40 bucks is a no-brainer.

Definitely, and Medusa's are $120-130 new...

Feigao's are just reverse-engineered Hackers that perform ok. But when the option is there to get a Castle/Neu for a little more. I'd definitely go that route.