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-   -   Losi Smart Diff (https://www.rc-monster.com/forum/showthread.php?t=19419)

RC-Monster Mike 03.16.2009 02:05 PM

Hmm. Well then, wouldn't the same braking forces prevent the front diff from "unloading" as well? I guess it makes sense - but is only useful if you don't have any front brakes at all(so it sounds smart, but it really doesn't sound like it does a whole lot in reality). Sounds like it isn't as smart as I thought it was. :)

GO-RIDE.com 03.16.2009 03:29 PM

Quote:

Originally Posted by RC-Monster Mike (Post 270447)
Hmm. Well then, wouldn't the same braking forces prevent the front diff from "unloading" as well? I guess it makes sense - but is only useful if you don't have any front brakes at all(so it sounds smart, but it really doesn't sound like it does a whole lot in reality). Sounds like it isn't as smart as I thought it was. :)

It was designed for nitro and definitely does not perform like a one-way. Any time power is applied (fwd/brk/rev) it acts like at least 10,000 wt. However, off power it acts like 1,000. So, although it does not separate the brakes front to rear it does allow the car to turn much better off power. And, it is also much better turning on power. So, ultimately it's not perfection for e-conversions, but is a huge improvement.

After testing my SD in both the center and then the front, I'm really liking it in the front of my e-8ight. I would probably purchase a second SD for the center, but I'm waiting on reviews of the Slipperential.

Jabe 03.17.2009 09:49 AM

Could anyone take some measurements? I want to know, if it will fit Hyper housings.

lucias 03.24.2009 04:10 PM

So if I get the front SD this should help some with my front end ballooning and help with steering through corners vs plowing.. I think it's worth a shot plus they sound like they will handle more abuse..

I think I will order one when I order my 8ight 2.0 (truggy or buggy)..

GO-RIDE.com 03.24.2009 04:33 PM

I don't know if they will take more abuse. The gears are actually smaller in the SD because a lot of the diff housing space is taken up by the ramp mechanism.

Shark413 03.24.2009 05:52 PM

Quote:

Originally Posted by GO-RIDE.com (Post 272820)
I don't know if they will take more abuse. The gears are actually smaller in the SD because a lot of the diff housing space is taken up by the ramp mechanism.

Here is a comparison of the Smart Diff gears and the standard diff gears. You can see there is a big difference in size. At least there made of steel, K-Cars and some Jammins use aluminum gears and brushless power is really hard on them.

http://i142.photobucket.com/albums/r...P1010038-1.jpg

sjcrss 06.11.2009 03:38 PM

Does any one know if the smart diff case is the same size as a hyper 7 or ofna diff case....I would like to know , because I have a idea, but want to make sure before i purchase a smart diff....any help would be appreciated..

stum 06.11.2009 07:29 PM

I tore a set of the smart diffs up in the center of my 8ight-e, they sent me new ones.. but I'm not sure if I even want to bother. I will say a bunch of guys tested these under the clock and the smart diffs actually turned in slower lap times. They tried in both buggy and truggy and ran all the same variables and tons of laps and took averages to keep it fair. Mind you the smart diff didn't loose by much only .5 seconds but a well tuned silicone setup did the job better.

Just figured I'd throw this out there :)

sjcrss 06.11.2009 10:32 PM

I have heard a lot of good things about the smart diff, by any chance stum, do you know if the diff cup is the same size as a hyper 7 diff cup, along with the 4 hole bolt pattern for the ring gear...... I'm still contemplating something, and would like to know these dimensions.before i purchase a SD...thanks to anyone who has this info...

lincpimp 06.11.2009 11:12 PM

If the SD is designed to fit in the eight vehicles it will fit in the hyper 7 but will need shims to take up the slack as the losi diff is shorter overall. If it fits the std spurs for the losi those have the same bolt pattern as the ofna/kyosho.

I would like to try one of these in my Muggy... Wonder if it will handle the 1521 on 6s.

BL_RV0 06.11.2009 11:55 PM

Since you don't race, would it make a noticeable difference?

lincpimp 06.11.2009 11:58 PM

Quote:

Originally Posted by BL_RV0 (Post 294972)
Since you don't race, would it make a noticeable difference?

I would like to see how it does as a center diff. Fully locked (or whatever it can do) on power would limit the front wheels blowing up, and it would still turn well off power.

Unsullied_Spy 06.12.2009 02:26 AM

Quote:

Originally Posted by Jabe (Post 270193)
Could anyone get some measurements?
Im wondering, if it will fit my Hyper... I have heard rumor, that its too big to fit Hyper housings...

Why not just buy an Ofna Torsen front diff? It will drop right in and work as well or better. http://en.wikipedia.org/wiki/Torsen They're good for performance, no doubt about that, but you will have to re-learn how to drive your Buggy.

Will these fit the Muggy? Mine has an aweful time trying to put down the power, especially in corners.

sjcrss 06.12.2009 05:43 AM

thanks guys for the info, I think I'm going to purchase one, and give it a try, stay tuned as i will be starting a thread on this......

Jabe 06.12.2009 09:02 AM

Quote:

Originally Posted by Unsullied_Spy (Post 295007)
Why not just buy an Ofna Torsen front diff? It will drop right in and work as well or better. http://en.wikipedia.org/wiki/Torsen They're good for performance, no doubt about that, but you will have to re-learn how to drive your Buggy.

Will these fit the Muggy? Mine has an aweful time trying to put down the power, especially in corners.

Well i have torsen as my centerdiff. I think there is bit difference with torsen and "smart diff", i mean its not the same.


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