my cat does doughnuts!

[autonm]

Apart from the SPUR/idler problems that I have been posting about, when it actually runs - it runs very well.

However when I turn into a corner it grips very well and powers out fine. However if I am a touch overstrong on the cornering the CAT literally does a doughnut!

I do not have to be going fast for this to happen, and even happens if I dont increase the power. Its as if the rear end is trying to swing by the the front wheels

Ive tried 40 and 25 in the rear suspension oil, didnt seem to make much difference. I have set the camber, ride height etc.

Ive even tried the same tyres on my B44 and the B44 does not show this doughnut'ing, so it isnt the tyres.

All screws/nuts/positions for the suspension etc are set to the middle hole.

If I reduce the turn on the transmittor then it loses's the ability to get round hairpins so I would rather fix the problem on the car rather than hiding it with a transmittor fix.

Any other settings I could try and change?

[sfry61]

Whats the setup on the rear end?

Have you tried using a softer spring?
Check the rear diff isnt too loose

[coolcars782]

I would try a softer rear spring as it seems like the rear is not getting enough grip.

Carl

[racingdwarf]

Hmm I'm not a cat man, but it sounds like the front maybe colapsing mid corner thus giving a sudden fist full of front end grip and the weight transfer going to the front, when mid corner, No weight on the back = no grip and the car will just snap out

Im no set up man but maybe heavier front end, oil & spring, poss tigten the front diff a bit maybe the outer row on the front tyres

[autonm]

thanks guys. I wont have a new set of springs before Friday (race night) - but I can try adding some weight to the backend first.

As for the diff setup, its per the manual, tighten right up and then slacken back by 90degree's. So to make it any tighter Ive only got quarter of a screw turn to play with.

[Cruise]

Try also a different ackermann setup.Lengthen the center track rod of the steering to a 13mm gap, this will transform the car completely.

Cruise