We had a carpet race last weekend in the south of Germany.
Great success for ORCA.
Modified 6 out of 10 A-main, 1st and 2nd in style.
RX2 motor (4.5T)
Gearing 9.1 (similar size as IIC)
3:32 (some where using 24 to take down top speed)
6:32 (to smoothen it out, 8 for more responsiveness
Motor timing Zero or 1 line.
The low gearing is important so 9.1 or even 9.3 for IIC is important to get a smooth powerful power band.
Heat is/was no issue at all, no additional fan on the motor needed.
We also took 1:st and 2:nd in the Blinky 13.5T stock class
There where more ORCA products at the event then any other manufacturer and some also changed during the event and I only got many thumbs up on power, drivability and ease of adjustability.
Have fun at the IIC.
If you don't have, get hocked up with ORCA, then you will have fun