asw7576

Yes, you need additional Mugen spare parts like rear diff ( gasket, o rings, drive shaft similar to rear diff, screws ).

Read instruction manual for rear diff assembly and compare it to front diff.

Front diff is good for tight track.

afm

You'll have to order all the separate parts. There is no kit with all included.

AFM

Robert I.

Does anybody know if we are having MTX 4 this year?Anybody has picture?

InitialD

http://www.rctech.net/forum/showthre...48#post1331148

gentleman81

iTrader: (2)

over all what is the easiest to drive, the stock pulley set up or the 16/19 conversion. i run 5min qualifiers and 10-20 mains, i dont go thru many tires, i ran the conversion last year, nut not a full season to really see the differences.

Scott Fisher

iTrader: (28)

I just ran a one hour main here in Vegas using the stock pulleys. I started with a 1.5mm split and at the end of an hour I was at about a 1.2mm split. The reason I say about, is because all 4 tires were different sizes at the end. The handling didnt change. The only thing that changed for the bad is that as the tires got smaller, the shift point got earlier. Next time I race, I will put new 2 speed springs on and have 2 sets of shoes. One setup for small qualifying tires and one setup for midsize tires. They will shift a little late at the beginning of the long main and a little early at the end. Something kinda neutral.

I have tried the 16/19 conversion and while I can't tell much difference, I prefer the stock pulleys.

InitialD

So you're saying you started with the front tires 1.5 mm smaller than the rear and at the end of the 1 hour main, you're left with the front tires about 1.2 mm smaller than the rear tires?

What tires and shores were you using?

asw7576

Scott : do you live in Las Vegas ? Can I ask you ? Do you play Gas Powered cars during summer ? Once I measure the temp was 44C and it's very dry. Would micro engines take such extreme temperatures ?

Scott Fisher

iTrader: (28)

Initial D: Yes that is correct. For that main I ran Fast Tires on the Mugen rim. 42 shore front and rear. My best qualifier was on GQ tires 40 shore front and 42 rear. I would have run that combo in the main, but I didn't have anymore 40 shore front GQ.

Asw: I do live in Las Vegas. I run during the summer and have had my cars on the track when the air temp is over 100 deg F. That is a about 38 deg C. You tune a little bit richer and I also have a new O'Donnell cylinder head which is bigger than any of the stock heads available. It definitely helps when it is hot outside.

Seisick

anyone using diffs with same oil, for instance 30k, what´s the effect compared to using a heavier front one? Like to try bur ran out of heavier oil.

asw7576

Heavy oil at front diff : slight understeer

Heavy oil at rear diff : slight oversteer

Advantage of having front & rear diff : braking without spin, more stable cornering, especially when you enter tight corner, the feeling is damn good.

Disadvantage : slower cornering speed and slower exit speed.

daniz24

Not always, especially on buggy cars

asw7576

seisick : you should ask daniz24, he knows better than me about rc cars.

Let me phrase the correct typing ( copied from RC World Mag )

Heavy oil at front diff : you turn harder ( wide turn )

Heavy oil at rear diff : you turn easier ( tight turn )

Ahhh .... I feel better now.

BrainTeased

iTrader: (4)

hi guys how are you all?

i cant do a search on this particualy topic as i will get all sorts of results back to me so hope you guys can do me a quick favor and tell me what the standard factory drivetrain ratio is?
i remember it being 2.5 something?

thanks guys

InitialD

Internal drivetrain ratio is 2.53.