XRAY - Model racing cars

hey got my t4'14 , been running indoors on carpet and it has been pretty good , but last night ( friday ) something didn't seem quite right , it seemed to want to push alot onpower , didn't have a great deal of off power steering , but then would try and break loose exiting corners , but the worst thing was , especially in the final , from mid to exit of the corner , it seemed like it was bogging down / rolling to the exstent of it scrubbing all its speed off .. and lots of tyre squeel , which i don't normaly get that !!

the only thing i changed this week ( to try and get a bit more entry steering ) was changed the front shock oil , from 40wt to 37.5wt ..

I wondered if its worth upping my shock oil , or fitting the 3 hole pistons ?

anyway here's my set up ..
spool up front , in up position - 1.3k in rear diff and in high position
: shocks , 4x1.1 pistons with front 37.5wt - rear 35wt
: springs , 2.7f - 2.5-2.8r
: mounted on 2nd hole front , 2nd hole rear , 2mm shims in front , 1mm on rear
: ride height 5.4r - 5.2f
: toe inserts , front - 0.5 out on front (.) rear / rear insers - RF (.) - 0.5 in on RR , 2.5 toe . 0.5 - degree toe on front
: front links 2mm on inner and outer , rear 1mm inside , 4mm outside
: link mounts hole 2 front , hole 1 on rear
: camber 1.5f - 2 degree rear
: anti roll bar 1.4front - 1.2 rear
: droop 6 front , 5 rear
: ackerman .5mm , 1.5mm under steering arm for bump steer
: on sorex jb28's , 1/2 additive on front for 15mins - full rear @ 20mins , no warmers
: running mazda speed6 and tried the mazda 6gx , but didn't like it !!
: and running on low to mid grip .
any suggestions ??

cheers

You should definitely try a heavier rear gear diff fluid. 2-3 or even 4K.

Try to increase your droop settings, 5.6 front and 4.6 rear is a good starting point.

Have you tried a new set of tyres? Your setup looks reasonable so if the car is suddenly that bad either the tyres are shot or there's something bent/tweaked.

Hi.

The weather here has improved which is nice so could be the hall/room you raced in was much warmer than normal? Tyre noise could be down to over heated tyres so this could explain changes in car.

Agree with Alex on thicker diff oil could help. Your springs are pretty hard too so this would also increase tyre noise/overheating. Sorex tyres I used 2.5 springs front and rear.

Oj

If it was pushing on power then would it be an idea to reduce rear camber to 1.5 and increase front to 2? Esp on 28's as the rear might be too planted?