TA03 Chassis Hop-ups...

[njmlondon]

I have a PIAA Porsche 911 on its way to me, and I am keen to hop it up a bit. However, there seem to be so many hop-ups for the gearbox and I do not know if they go together or how many I need.

The hop-ups available are:

53200 4WD One Way Diff Unit

53267 TA03 Ball Differential

53279 TA03 Torque Splitter

53299 TA03R Torque Control Unit

Can somebody educate me please!

I also dont really understand what these hop-up:

53191 4WD/FWD Turnbuckle Tie Rod Set

53192 4WD/FWD Turnbuckle Upper Arm Set

and finally the...

53488 Adjustable Ball Connector for Damper

Can anybody enlighten me!

Thanks

Noel

[WillyChang]

All of those you've listed are "tuning options", not really hopups.

Ball diffs can be installed in front, rear or both. Ball diffs are adjustable for the amount of slip, unlike the kit's gear diffs.

One-way diff and the 2 'torque splitters' basically do the same job - they are a one-way for the axle. Believe the difference between 53279 & 53299 is that the latter comes with different sized pulleys, otherwise they work the same.

TA03s come with fixed suspension links, which you can make adjustable using the turnbuckle sets. However you might find after much trial-n-error that your settings are right back where the stock arms were; Tamiya got the kit settings pretty much correct.

If you want to talk "hopups", consider:-

Universal driveshafts

Metal shocks (although the kit CVAs work well)

full ball bearings

FRP or Carbon plate chassis sets

lightweight lay shafts

low friction drivebelt

fine pitched gears from the TA03PRO

alloy suspension parts & hub carriers

Your 1st option should be a TA03 Bumper Set, in any case. []

[miramar]

Tamiya TA01/TA02 and TA03 ball differentials are NOT adjustable.

[TamiyaRacer]

You can adjust the ball diffs, like Willy says, so that you get some slippage. When we raced the M02 and M04 RWD chassis, and before the good Type A tires were available, you had to back off the diff about a 1/4 turn so you got a bit of slippage when applying the throttle, otherwise the car was quite loose. A spot of liquid thread lock keeps the screw from backing out.

[miramar]

Yes, you CAN adjust the TA01/02 and TA03 ball diffs by not tightening the screw fully as you're supposed to, but are not supposed to be adjusted, and are as such, not adjustable. You will never find a Tamiya manual describing any adjustment of these diffs.

With enough experience and knowledge, it's of course possible to do as you describe, but I know from own experience that very few of the experienced RC-racers (and from 1987 when the Manta Ray balldiff was launched and untill March 2000 my customers) manage to "adjust" the TA01/02 and TA03 diffs in such a way that they're not damaged, even though they are used to normal adjustable balldiffs. Accordingly, for the absolute majority of us, assembling these diffs like their supposed to, is by far the best way.

[hornetdude]

I found a page with some bits of info on ..maybe some help [?]

http://www.direct.ca/xenz/jeff/tips/hop-ups/hop-ups.html

Steve

[WillyChang]

I think what Miramar means is that they're not meant to Slip. Any slippage will flatten the balls and groove the rings.

But they're definitely "adjustable" between 'loose' vs 'tight', whereby loose does not allow slippage. When tight you'll barely be able to turn the 2 wheels against one another eg locked diff.