XRAY - Model racing cars

First of all, sorry for my english. Sometimes it's difficult for me also the Italian
My friend had the bad idea to tell me to try the rubber tyres on my T3R (just a "bit" modified) so I changed a lot in my car from the foam tyres setup.
Our track is a bit small, tarmac surface with some hairpin curves.
Today I made some modifications using also the T3R Setup Sheet for rubber, but I've just some problems in the closest curves. Before I had some problems with the rear that can't follow the front so quickly I need. Now sometimes the rear has too much traction in the end of the hairpin curves or, sometimes in the middle of chichanes. If somebody has some suggestions...
The first problem is the driver... And I'm working on it...
I know that it's difficult to understand the setup without the car, But I'll try to explane.
- Exotek carbon chassis
- Spec-R front and rear differentials (tomorrow should arrive x-ray's differentials). I can't use the ball bearing (I'ts broken and I'm waiting the parts) in the rear transmission, but I feel more easy to drive with gear one (when I used the foam tyres). In front I had some problem with the solid axle in the hairpins, but with the differential I had no so much problem.
I used 1.000.000 grease in front (before I tried also with 500.000 but hot with all today's modifications) and 1.000 in rear one. I'd like to try the 500 with the x-ray's gear differential (it shouldn't leak like spec-r).
- T3 2011 shocks, with 3 1.1 holes in piston in front and 3 1.2 holes in back pistons. Oil 400, blu springs in front and white in back. At the moment I fixed in the 3rd hole of the shocks' horns.
- Front ride heigh 6, back 6.5 (I was thinking to put it down 1mm for both). Downstop... Boh... I must check it, but If I can remember it should be 6 front and 5 rear
- I have also "H" quick roll centers, used like the set-up sheet.
- All other "parameters" (ackermann, camber, caster, etc) are like in the setup sheet
- Tyres MuchMore 35 complete with the insert.
- MazdaSpeed 6

If you need some other informations...

I think you are describing oversteer (when the back of the car slides out).

Is this at the start of the corner as you brake, or the end of the corner as to apply power?

Skiddins

Yes, but non in all curves, just in hairpins.
By the way, yesterday I received the 2 gear differentials by x-ray, and I must confirm the good quality. I used 1.000.000 oil in front one and 500 in the backone. I replaced also the 50mm axels in rear with 52mm axels. Yesterday I destroyed the tyres, but it was better than the old configuration. I don't know if I must use also softer springs in ammo like told me my friend or simply I must use another curve in the ESC...

Hi Cava,
I'm Italian also and i'm a big big XRAY's fan.
Contact me if you want to: pigiolino@gmail.com
I have a lot of XRAY and in Italy I and other XRAY's fan organize some XRAY meeting for testin the cars out and indoor.
Cheers
Pier

[Little OT]
Pigio!!!! Non so su quanti forum ci siamo già incontrati (modellismo.net, automodelli.it, H8ita, barone, ...)! Io sempre come Cava o Fcava (in quelli che mi hanno "ciulato" il nick)
[end little OT]