As title,

What is a 20psi Actuator?

Got a brand new one on an Exchange T34 Hybrid and was just wondering what it was in relation to the likes of a -31 or -34

Has a pretty strong spring by the feel of it.

Any info is appreciated as always

Thanks,

 

It's most likely the lift off pressure (i.e. minimum boost it can produce on its own)

Can be tested with a Miti-vac...

 

a -31 opens at 10 psi & a -34 at 14 psi

 

Oops! Missed the comparison bit, IIRc though, -31 is 8psi.

 

cheers guys