Hi guys.

What is the best actuator to use on a standard S2 engine?
The specs:
Engine is rebuild to original spec. New original Garret turbocharger.
Larger intercooler, K&N panel filter and 2.5" stainless mongoose exhaust.
Hart/diamond/hash ECU, original, not chipped.

I used an old original actuator on the new turbo charger, but it seems the actuator is a bit tired. Starts to open at 0.2 bar (2.9psi)
I only find -18 or -31 actuators beeing sold. But what do these numbers mean? Which should I choose?

Thanks,