Autostrada,
Try using all 40 wt oil front and rear with the Tamiya springs. Blue front and yellow rear, or all yellow. I'm not sure about the Tamiya carpet tires, but with that spring and oil combination using comparable Sorex 28 or 32 tires, your basic carpet setup should work. I still have a 417v5 that I run on carpet with these settings and can do very well with it. 17.5 powered cars can run softer than the higher power motors as weight transition isn't as abrupt. If you're racing in cooler climates, drop the oil down to 35 or 37.5 weights. My oil references are for Associated silicone oil. You will have to try and see what works for your driving style/ track layout.
Also, look at the other carpet setups. On petit, look at Sean Williams's setup as I run the same track he did his car setup on.
Last edited by greenpea76; 04-08-2015 at 10:12 PM.