john holmes 69

iTrader: (14)

Why would you be running a 4.5 in a tc3 on carpet ? They car is not built to withstand that power , grip , and extremes. I would love to see a video of you tapping a board at that speeds. You would lose both front and rear arms plus who knows what.

gigaplex

iTrader: (2)

There's plenty of videos online of Bert bouncing off the walls even in the slower classes.

oreo

......i do believe there's a meme with an amusing sound byte originating from G.T.A.-" Aww ***, here we go again ! "( and this isn't even the Tc-3/4 thread ). Anyways , i'd hope the OP gets some clarity on the gearing.-greg

Airwave

iTrader: (1)

Maybe it is my level of english which is a problem there but I don't understand why, if you know that there is an issue with a 21.5T motor, will you go for a 4.5T, then for 3.5T... What's the point here? Have you every considered that the issue is probably coming from the excessive grip provided by the Black Carpet? Have you tried it in other conditions?

EDWARD2003

iTrader: (8)

I’ll be doing some testing to see how well the ball differential holds up on carpet with a 17.5T Justock setup. Should be fine as long as the differential has been built and broken in correctly.

gigaplex

iTrader: (2)

It's not your level of English. There's no reason to run a 3.5T on carpet, no matter the car.

DirkW

iTrader: (1)

Especially if a 4.5T is already shredding your diff/drivetrain, what could make you think that an even more powerful motor would work better?
But hey, it's Bert...

Dread Pirate

iTrader: (15)

We're a little off the original posts topic, but I still race well with my TC3 on black carpet.
Have used the 17.5T & 21.5T Justock from the Vegas IIC spec and amateur classes. Ball diff holds well for these motors.
Getting the FDR into the 3.4 - 3.8 range for these motors requires 50-56T pinion with a 74-76T spur, and that size pinion requires dremeling out the webbing in the chassis under the pinion. Structurally no harm done.
Setup I use is really close to the stock kit recommendations with less droop in the rear, ~3-3.5 on black carpet.

Fun running the TC3 mid-pack against all those Carbon/Ti beauties.

bertrandsv87

iTrader: (2)

To answer all of you guys here, the ball diff is at a disadvantage against a gear diff(no slip) because of unavoidable slip, no matter the brushless motor used: that inherent slip increases the tc3/tc4 laptimes 0.2sec or more per lap... I want to use a 3.5t motor due to less initial torque eventhough more power is available later in the powerband: less torque around turns when diff slip is high and more power down the straight to make up some time on the gear diff cars...I don't know why associated did not make a gear diff for the tc3/4, but with my 17.5t motors at 3.9fdr to 4.0fdr, I struggled alot to keep up, not realizing that the ball diff had alot to do with it....Anyway, good luck with your tc3, and see you at the track soon....

gigaplex

iTrader: (2)

A 3.5T will have more initial torque. You're better off with a 5.0T and then using ESC settings to reduce the bottom end further.

AE didn't make a gear diff for the TC4 because they'd already moved on to the TC6 before sealed gear diffs became popular.

Timster1973

iTrader: (1)

is your gear 64 pitch or 48?

gigaplex

iTrader: (2)

At those sizes, 64.