R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro On-Road

Reply
 
Thread Tools Search this Thread
Old 06-12-2003, 11:19 PM   #5296
Tech Elite
 
Vinyard's Avatar
 
Join Date: Sep 2002
Posts: 2,493
Default Re: Re: Re: Re: Re: Re: front differential

Quote:
Originally posted by RClover
someone in this tread (cant remember who) is running 30k/10k with good results. you may check with 'em
Me! Me! but i like to ask is i mix 30k/10k does it really gives me
20k or somewhere along that line?

Because I am unable to get 20k diff oil..
Vinyard is offline   Reply With Quote
Old 06-12-2003, 11:25 PM   #5297
Tech Master
 
FREAKAH's Avatar
R/C Tech Elite Subscriber
 
Join Date: Jan 2002
Posts: 1,389
Default Re: front differential

Quote:
Originally posted by Pepe
I am building a front differential.
What oil should I use for a small track?

Help appreciated
I use 15,000-20,000 with excellent results. Lots of steering on a tight track with rubber OR foams.

FYI, I have 5,000 in the rear.
__________________
Second-Hand Racing
RACE WORLD HAWAII
Losi Type-R |Tamiya F104 PRO | Tamiya F103 | Mugen MTX-4R | AE FT GT2
FREAKAH is offline   Reply With Quote
Old 06-13-2003, 12:03 AM   #5298
Tech Champion
 
Manticore's Avatar
R/C Tech Charter Subscriber
 
Join Date: Aug 2001
Location: Heaven
Posts: 9,999
Default Re: Re: Re: Re: Re: Re: Re: front differential

Quote:
Originally posted by Vinyard
Me! Me! but i like to ask is i mix 30k/10k does it really gives me
20k or somewhere along that line?

Because I am unable to get 20k diff oil..
Hope so !
Manticore is offline   Reply With Quote
Old 06-13-2003, 01:11 AM   #5299
Tech Elite
 
Racing4Evo's Avatar
 
Join Date: Sep 2002
Location: SoCal
Posts: 2,118
Trader Rating: 2 (100%+)
Send a message via AIM to Racing4Evo
Default

Ahh man, you don't need to do that to the clutch. We are using centax clutches now. That is what the spring and spring keeper(unless you have a better term for this) are for.
Racing4Evo is offline   Reply With Quote
Old 06-13-2003, 02:14 AM   #5300
Tech Elite
 
Corse-R's Avatar
 
Join Date: Aug 2001
Location: Madrid (Spain)
Posts: 2,121
Default

Quote:
Originally posted by eddiethefish
somebody still owes me an explaination for this one. There gotta be a difference somewhere. Notice that 42/21 and 44/22 both yields "2".
On electric cars there's a myth about same ratios with different pinion/spur combos that some people seems to apply with success.

On large tracks where you need lots of high speed, use the larger pinion/spur combination, this yields more inertia to the transmission and allows you to be slightly faster, but hampers slightly the acceleration (when your engine needs to move more weight, needs to apply more torque (and in this case, is rotating weight).

On smaller tracks the same ratio with smaller pinion/spur combo is more related to acceleration (due to their rotating mass).

In our cars you have to choose and see if permits to mesh correctly to the 1st gear, if all two meshes, much probably I'll choose the larger combo on a larger track, but this is going to finetune the car up to a level that probably you need to pass each lap by the same place, braking ever on the same place and accelerating as needed to see any difference (and probably is something like 0.01 or 0.02 secs).

I told the theory behind the same rations on different pinion/spur combos, you need to try for yourself and see if worths to you.
__________________
Cheers,
Corse-R
---
[quote=MugenDrew;2684554]BATTERIES are for FLASH LIGHTS, gasoline is for cleanin parts, alcohol is for me to drink and well NITRO...everybody know thats for racing.[/quote] :D:D:D
Corse-R is offline   Reply With Quote
Old 06-13-2003, 02:37 AM   #5301
Tech Fanatic
 
RClover's Avatar
 
Join Date: Jul 2002
Posts: 869
Default

Quote:
Originally posted by Corse-R
Depending on the tracks where I'm I swap from 16/20, 16/21 or 17/21 on pinions.

Usually to fine-tune I move from 47/43 to 47/44 or 46/43. Only used one time 42T spur, shifting was a little sluggish.

BTW: You don't need to worry about meshing. 17/21 combo has the same diameter as 16/20, only changes a little the profile of the teeth. 17 & 21 pinions mesh perfectly.
assuming the power is constant on my motor, will changing the pinions to 16/21 47/43 better than 16/20 47/42 or vice versa?
i am a little lazy to change the pinion.
RClover is offline   Reply With Quote
Old 06-13-2003, 02:53 AM   #5302
Tech Fanatic
 
RClover's Avatar
 
Join Date: Jul 2002
Posts: 869
Default

ok...used the dino ratio calculator.. here's what i have.

assuming the tyres are 64mm (front/rear) with stock pulleys.

16/47 = 7.4210
20/43 = 5.4315

if change pinion to 21T,
16/47 = 7.4210
21/43 = 5.1729

if change spur to 42T,
16/47 = 7.4210
20/42 = 5.3052

from the above, changing the pinion to 21T will gain better top speed than changing to 42T, rite? but probably at the expense of sluggish when kick into 2nd gear (if 21T pinion is used)?
RClover is offline   Reply With Quote
Old 06-13-2003, 02:56 AM   #5303
Tech Elite
 
Corse-R's Avatar
 
Join Date: Aug 2001
Location: Madrid (Spain)
Posts: 2,121
Default

Quote:
Originally posted by RClover
assuming the power is constant on my motor, will changing the pinions to 16/21 47/43 better than 16/20 47/42 or vice versa?
i am a little lazy to change the pinion.
Depending..... with a 16/21 with 47/43 you have a final ratio of 7.421 on 1st and 5.173 on 2nd gear. With a 16/20 with 47/42 you have 7.421/5.305 so it's shorter.

Moving one teeth on the pinion is much larger than moving a pinion on the spurs as we do usually on electric cars.
__________________
Cheers,
Corse-R
---
[quote=MugenDrew;2684554]BATTERIES are for FLASH LIGHTS, gasoline is for cleanin parts, alcohol is for me to drink and well NITRO...everybody know thats for racing.[/quote] :D:D:D
Corse-R is offline   Reply With Quote
Old 06-13-2003, 02:58 AM   #5304
Tech Elite
 
Corse-R's Avatar
 
Join Date: Aug 2001
Location: Madrid (Spain)
Posts: 2,121
Default

Quote:
Originally posted by RClover
from the above, changing the pinion to 21T will gain better top speed than changing to 42T, rite? but probably at the expense of sluggish when kick into 2nd gear (if 21T pinion is used)?
You have self answered your question.... Usually use the 21 pinion with 43 spurs, only go with 42 spur to cope with the different tyre size trying to keep the rollout at par as tyres get smaller (as many others do).
__________________
Cheers,
Corse-R
---
[quote=MugenDrew;2684554]BATTERIES are for FLASH LIGHTS, gasoline is for cleanin parts, alcohol is for me to drink and well NITRO...everybody know thats for racing.[/quote] :D:D:D
Corse-R is offline   Reply With Quote
Old 06-13-2003, 03:09 AM   #5305
Tech Fanatic
 
RClover's Avatar
 
Join Date: Jul 2002
Posts: 869
Default

Quote:
Originally posted by Corse-R
only go with 42 spur to cope with the different tyre size trying to keep the rollout at par as tyres get smaller (as many others do).
so the new belt conversion will solve the rollout problem without having to use 42T?
RClover is offline   Reply With Quote
Old 06-13-2003, 03:15 AM   #5306
Tech Elite
 
Corse-R's Avatar
 
Join Date: Aug 2001
Location: Madrid (Spain)
Posts: 2,121
Default

Quote:
Originally posted by RClover
so the new belt conversion will solve the rollout problem without having to use 42T?
Not solves completely but alleviates the rear tyre wear problem.
__________________
Cheers,
Corse-R
---
[quote=MugenDrew;2684554]BATTERIES are for FLASH LIGHTS, gasoline is for cleanin parts, alcohol is for me to drink and well NITRO...everybody know thats for racing.[/quote] :D:D:D
Corse-R is offline   Reply With Quote
Old 06-13-2003, 03:18 AM   #5307
Tech Fanatic
 
RClover's Avatar
 
Join Date: Jul 2002
Posts: 869
Default

are you on 40/40 shores? with a 3mm split with 363mm belt now?
RClover is offline   Reply With Quote
Old 06-13-2003, 03:26 AM   #5308
Tech Elite
 
Corse-R's Avatar
 
Join Date: Aug 2001
Location: Madrid (Spain)
Posts: 2,121
Default

Quote:
Originally posted by RClover
are you on 40/40 shores? with a 3mm split with 363mm belt now?
Last day I tested it was running on 42/42 and tyre wear was almost even with a 3.5mm.... Key to this is going with a 3 to 3.5mm tyre split (depends on your driving preferences).

Yesterday did a full 45minute main simulation and tyres ended much better and handling was much better than with no split tyres configuration (last 15 minutes were a real nightmare in handling terms.... too squirrely and too nervous at the rear end).

16/19T conversion will solve the problem of uneven tyre wear, not solves a rollout problem (rollout variation is intrinsic of foam wear and diameter decrease of the tyres).

Running with foams will make you to pay attention to the diameter of your tyres and change gearing accordingly to the diameter of the tyres.
__________________
Cheers,
Corse-R
---
[quote=MugenDrew;2684554]BATTERIES are for FLASH LIGHTS, gasoline is for cleanin parts, alcohol is for me to drink and well NITRO...everybody know thats for racing.[/quote] :D:D:D
Corse-R is offline   Reply With Quote
Old 06-13-2003, 06:01 AM   #5309
Nitro Tech
 
dino.tw's Avatar
 
Join Date: Oct 2002
Location: I can drive!
Posts: 1,459
Wink

Anybody called me?I heard someone called my name....

21.5T ?? It's EASY CASE really!
Use one 22T and half-break one tooth.
dino.tw is offline   Reply With Quote
Old 06-13-2003, 07:02 AM   #5310
Tech Addict
 
mistercrash's Avatar
R/C Tech Charter Subscriber
 
Join Date: Sep 2002
Location: Guelph, Canada eh!
Posts: 721
Trader Rating: 5 (100%+)
Default

Quote:
Originally posted by RClover
here's the tips...again.. but its ok! Welcome on board!
Thank you very much for the quick response. I know it's a pain to repeat the same thing over and over again But these threads are getting so big that it's sometimes difficult to find answers by searching for it. Anyway! I love this thread And I can't wait to get my MTX3. I'm sure I'll have as much fun racing it as I did with my MTX2. Maybe even more.

Thanks again
mistercrash is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
MUGEN MBX5R/MUGEN MBX5T PROSPEC/TRAXXAS RACE REVO Jason Halvorson R/C Items: For Sale/Trade 14 01-12-2008 10:32 AM
Mugen 5T Chassis, Mugen 46 Tooth Pinion, Associated Ride Height Gauge bretzkej R/C Items: For Sale/Trade 1 08-19-2007 06:31 PM
USA's Most Wanted FOR SALE Mugen MBX5R,Losi 8 comp, and Mugen MBX5T Prospec Truggy nobike R/C Items: For Sale/Trade 69 04-28-2007 07:45 PM
Another MTX3 prospec w lots of parts and an optional Mugen X12 w Mugen pipe Scott Fisher R/C Items: For Sale/Trade 11 11-21-2005 05:45 PM
drake xxx nt and mugen mst-1+extras......Looking for a kanai 2 or maybe mugen buggy [email protected] R/C Items: For Sale/Trade 5 06-30-2003 09:31 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 04:42 AM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net