B-Fast Diffs

[rob martin]

For the smoothest diff!~!! Ive been running these for a lil bit of time now but now there available to the public. The B-fast diff kit for the sx10 and sx10T. If you want the smoothest diff out there look no further. This is what u get in the kit.

Also NEW to the B-Fast store are the TQ Racing Direct Upgrade Diff Kits.
The Ring kit #R10 (two B-Fast Diff Rings & shims), Driver’s Kits # DR10 (two diff rings & shims and 12 Carbide Diff balls) and the Pro Driver’s kit # P10 (two diff rings & shims, 12 Carbide Diff balls and the TB26 Thrust Set)

Check out bfastrc.com for more info. If you have any questions feel free to ask away:thumbsup::woot::D

[notme]

Its smooth, but what does it do for performance?

[kedal]

Sounds good Rob, i'll think about it when time will come to change my diff.

[rob martin]

Its smooth, but what does it do for performance?

Smoother diff equals

Better steering
better/more traction

And a whole other slew of things. The diff IMO is one of the most crucial parts on a 1/10 scale car or any scale for that reason. Try one out. I can honestly say and not just cause i run for b-fast but its the smoothest diff out there hands down.

[rob martin]

Sounds good Rob, i'll think about it when time will come to change my diff.

Nice you'll like it.

[notme]

I have the option ceramic balls in mine already. Not sure if the bfast would be much of a performance gain. If I buy the truck I'll try the bfast setup and compare the diffs on the bench.

[ConceptRacing]

Just ordered mine to see how well it works, need to change the diff after running it in the winter, in the rain and snow, now the outdoor season is about to start here, its time it got a total overhaul, I will let everyone know how smooth it is, got to be better than the kit diff.

[rob martin]

Just ordered mine to see how well it works, need to change the diff after running it in the winter, in the rain and snow, now the outdoor season is about to start here, its time it got a total overhaul, I will let everyone know how smooth it is, got to be better than the kit diff.

Nice let me know how u like it.

[Jaune]

Just got my B-fast kit today. I had a gritty diff for the last two races. Can't wait to try those!

[notme]

Curious, how do you set your diff.......as in how much do you back off from tight?

[B-Fast R/C]

Curious, how do you set your diff.......as in how much do you back off from tight?

B-FAST R/C PERFORMANCE
Differential Break-In Procedure

1) Clean all parts and work area

2) Follow owner’s manual for assembly instructions

3) Lightly Coat Diff Balls with B-Fast Pro Diff lube, thoroughly lube Thrust Bearing with
B-Fast Pro Thrust grease. (or equivalent)

4) Snug diff screw just until gear will not turn while outdrives are held.

5) Hold one outdrive from spinning, a hex wrench that fits into the outdrive slot, clamped to your bench or in a vise works good.

6) Use a power drill or Dremel (the cone shaped cotton polishing tip works great) to spin the diff for about 20 seconds (HIGH rpm on drill, LOW on Dremel). Reverse rotation for another 20 seconds.

7) Tighten diff screw about 1/16 of a turn and repeat step 6

8) Repeat step 7 at least two more times.


Follow owner’s manual to set slipper
Slipper should slip BEFORE the diff
Do Not let the Diff Slip at anytime!!

[ConceptRacing]

Mine arrived last Saturday, good turnaround, less than a week, fitting it was really easy, like a normal diff, just be careful when fitting the thrust bearing, not caged bearings but uses 8 balls instead of 6, more is always better, ran the diff in as per instructions, it now feels so smooth, almost like a 12th diff! this can only do good things to the car, all it needs now is testing at Cov this Sunday, I will let you all know how it goes but all I can say at the moment its well worth upgrading the diff on any car, even more so on a 2WD car and this looks like a well worth option to go for, thumbs up from me!!

[ConceptRacing]

Ran the B-Fast diff at Stoke on sunday, well worth the upgrade for the money, the diff ran as expected and didnt let me down, steering increased a lot and had to be turned down, never once did i hear it slip, certainly a major improvement on the original diff!

[kedal]

Thanks for your comment CR, it's good to hear.

Very interesting.

[CODMAN]

I have to agree here! Fred at B-Fast makes a great product at not much more than a new diff set from the manufacturer. You just upgrade to it when your first (stock) diff needs changing. They are very smooth which gives great performance and long lasting if you set it up per the instructions!

Well worth it!:thumbsup:

[kedal]

Hi guys, I soon need to change my diff, and I would like to know, from those who use this B-Fast diff if it works correctly during a long time, more than the stock diff, or the same ?

Thanks :)

[positronic]

prices seem good, think I will order a set in the near future.

[zagonielod]

Hi guys, I soon need to change my diff, and I would like to know, from those who use this B-Fast diff if it works correctly during a long time, more than the stock diff, or the same ?

Thanks :)


I am also interrested in those diffs if they are so good as said. It is so unfortunate, that my diff isn't the best. And I have driven a race B4 with a wonderfull diff, and I cannot compare mine to it. It is another league! It turns approx. 150% better :P

[zagonielod]

I am also interrested in those diffs if they are so good as said. It is so unfortunate, that my diff isn't the best. And I have driven a race B4 with a wonderfull diff, and I cannot compare mine to it. It is another league! It turns approx. 150% better :P

[Battle_axe]

mine is on its way i have been running a very poor diff till now and its holding me back

[rob martin]

If its set correctly you should get a good bit of running out of it. Ive been running my last rebuild for about a month and a half i race every week sometimes twice.:)

[ConceptRacing]

I have a couple of B-Fast diffs in stock for the Mad Rat at the moment, looking to retail them at £35 including postage for a complete diff including diff and thrust grease,
A complete diff comes with diff plates, shims, carbide diff balls, thrust plates and thrust balls and instructions,

for more information click below

http://www.bfastrc.com/tqracing.html

please send PM, not posted up on website yet.

[kedal]

I received my bfast diff kit this morning, build it this afternoon, and wow ! Very smooth !!!

Big test this sunday during a race.

[nicefrog]

Nice, they are definitely the first after market item to have on these cars !:). Let us know if you set your best lap time

[smokes]

Err wouldn't be cheaper to sand the rings down your self? I use 600 wet and dry on a flat surface and a bit of elbow grease and sand the ring by truning them in a large arc, inspect to see where there are unsanded areas those are your low spots. sand until whole ring has and even grained finish. Do both sides the ring are pressed from sheet steel they are not flat. I would then sand them down with 1200 grit wet and dry until you get a mirror like finish. do not polish! the texture surface allow the balls to grip the plates. when you rebuild the diff sand as per the previous procedure the grooves out and rebuild. it take less time to sand the groove out than prep new rings! I do this for all my diffs and use ceramic balls, end up with very smooth diffs that are low maitenace as well, cause they wear is even across the ring it less likely to go notchy, and you don't need to set the diff as tight to eliminate slip. see this link (http://www.teamirsrc.com/techtips.html)

[kedal]

I've done it on my 2 stock diff, but they're now dead, both rings and balls.
You're right, it's cheaper.

But as I don't have anymore good part of the stock diff, I decide to test the B-Fast one.
If the BFast diff is more durable than the stock one, it became cheaper to buy the BFast one, because it is better also.