Savage Flux Gearing - RC-Monster Forums

skellyo · **Savage Flux Gearing -** 02.18.2009, 07:20 PM

Can anyone verify the gearing for me? It looks like this is what it has:

Diffs: 3.307 (43:13)
Tranny: 2.697 (44:18, 32:29)
Pinion/Spur: 20:44

Total Gear Ratio out of the box: 19.628:1

I have the tires at 6.3". Putting all that into the calculator gives me a speed on 4S of 31.09mph. That sounds a bit low, are my values correct?

johnrobholmes · 02.18.2009, 07:31 PM

Sounds low to me too. Probably closer to 15:1 I would bet. I may pick one up here soon, just trying to unload my emaxx first.

MTBikerTim · 07:41 PM

Quote:

Originally Posted by skellyo

Can anyone verify the gearing for me? It looks like this is what it has:

Diffs: 3.307 (43:13)
Tranny: 2.697 (44:18, 32:29)
Pinion/Spur: 20:44

Total Gear Ratio out of the box: 19.628:1

I have the tires at 6.3". Putting all that into the calculator gives me a speed on 4S of 31.09mph. That sounds a bit low, are my values correct?

You may find that that is correct. If it was geared too tall when people put 6s in it they would fry the motor. It the tranny locked in first or second in the flux? Its first isn't it? In the 4s videos I have seen too it hasn't been that quick either.

skellyo · 02.18.2009, 07:41 PM

It does sound low, but I verified the part numbers and tooth counts in two places:

http://s244.photobucket.com/albums/g...urrent=004.jpg

http://e-savage.com/forums/showthread.php?t=4316

fastbaja5b · 02.18.2009, 08:40 PM

On that calculator, assuming you are right, when you go to 6s power and 25t pinion it should be 62mph (claimed top speed) which it isn't (it's 58) so I would suggest something is out.

My Revo BL on 4s is calculated as 33mph right now and it's not even close in speed to a Flux on 4s

lincpimp · 02.18.2009, 08:45 PM

Quote:

Originally Posted by fastbaja5b

On that calculator, assuming you are right, when you go to 6s power and 25t pinion it should be 62mph (claimed top speed) which it isn't (it's 58) so I would suggest something is out.

My Revo BL on 4s is calculated as 33mph right now and it's not even close in speed to a Flux on 4s

Did you account for tire growth... At 58mph those tires must be huge...

Looks like I will be locking my flm savvy in 2nd in order to use the 1521 2y... 2.697 for the tranny is too low for my uses.

Marv829 · 02.21.2009, 10:46 PM

Quote:

Originally Posted by skellyo

Can anyone verify the gearing for me? It looks like this is what it has:

Diffs: 3.307 (43:13)
Tranny: 2.697 (44:18, 32:29)
Pinion/Spur: 20:44

Total Gear Ratio out of the box: 19.628:1

I have the tires at 6.3". Putting all that into the calculator gives me a speed on 4S of 31.09mph. That sounds a bit low, are my values correct?

Hi, I have the following:

Diffs @ 3.307 (43:13)
Trannny @ top drive gear to first idle gear 2.444 (44:18)
Trannny @ second idle gear to output gear 0.906 (29:32)
Spur-Pinion @ 2.200 (44: 20)

For a total ratio of 16.109

With 14.8v, 2200kv and 6.3" tire the math for that combo is ~37.9mph

Where our math differs is the second gearing stage of the tranny.
I see the 32T gear on the idle shaft driving the 29T gear on the output shaft. Which means it would only take the 32T gear 0.906 of a revolution to turn the 29T output gear one full revoultion.

skellyo · 02.22.2009, 12:01 AM

Quote:

Originally Posted by Marv829

Hi, I have the following:

Diffs @ 3.307 (43:13)
Trannny @ top drive gear to first idle gear 2.444 (44:18)
Trannny @ second idle gear to output gear 0.906 (29:32)
Spur-Pinion @ 2.200 (44: 20)

For a total ratio of 16.109

With 14.8v, 2200kv and 6.3" tire the math for that combo is ~37.9mph

Where our math differs is the second gearing stage of the tranny.
I see the 32T gear on the idle shaft driving the 29T gear on the output shaft. Which means it would only take the 32T gear 0.906 of a revolution to turn the 29T output gear one full revoultion.

Yep, you are correct. Unfortunately the information I originally found on another site was incorrect in that it had the 29 and 32T gears in the tranny backwards. Now that I actually have one and can see the manual, I see that the 29T is the output while the 32T is the idler.

fastbaja5b · 02.23.2009, 08:40 PM

Lol got to keep the front tyres down first to get to that speed!

samintrepid · 02.23.2009, 10:21 PM

In the xtreme rc magazine savage flux speed 41.68mph on 4s.

Steve182 · 02.24.2009, 01:44 AM

I just picked up a Flux and was wondering this exact thing. I cant decide id I wanna go for 6s or 4s.

BrianG · 01:47 AM

Compromise and go with 5s! Just run two 5s smaller packs in parallel. ALthough I usually don't recommend this because both pack should be exactly the same voltage prior to hooking together...

BTW, nice avatar. It reminds me that I have the first 14 (IIRC) comics from back in the day. Might see what they're worth on eBay...

Steve182 · 02.24.2009, 02:02 AM

Yeah I really do want to run a 5s, but I cant afford two 5s packs right now. I am thinking 4s... but Im not sure if it will solve my power craving :)

fastbaja5b · 02.24.2009, 02:04 AM

Trust me, it's hard enough keeping it on it's wheels with a 4s set up!!!

skellyo · 02.24.2009, 10:46 AM

4S is actually driveable on a track. Unless you just want high speed passes and straight line running, I wouldn't recommend running anything greater than 4S. Besides, if you want just a little more speed, just change a tooth or two on the pinion.