i'm really really sure it's a ct20 pete i read it in a toyota turbo review in hpi or zoom i forget...
i also read (sorry not based on expirience) that the ct26 will make more power than the ct20... i think the ct20 is better matched to the 3s for sure but i think it would be out performed by a ball bearing version ct26 with to4 turbine on a 1j...