-31 Actuator T3
Turbo Mini Forums

Hi, sorry if this is all a stupid bunch of questions but...

is the attached actuator suitable for the metro T3? also does anyone know what psi they are set to? or is it adjustable? also what does the -31 mean?

is this type any good?

http://cgi.ebay.co.uk/Black-Collins-31-Act...5QQcmdZViewItem

cheers.

Edited by MarkGTT on 21st Mar, 2007.

i think -31 is 15psi but not sure. But im sure you can change the springs in those collins ones. If it fits an rs turbo it should in theory fit a mini t3, only problem might be clearance as those ones are quite big iirc.

go for a 8 psi actuator and bleed the signal off for further boost

maestro 2.0 litre turbo actuators are if iam correct are standard set at 8psi and are alot cheaper than the Bling billet ones

Agree with benross, im using a standard rs turbo actuator (if my car ever gets finished) which i think is 8psi and is identical to the standard mini/metro one.

Ok thanks for the sound advice, i have the standard metro actuator at the moment, and an MBC, just wondered if its work going for an uprated item.

Hi,
All actuators are adjustable, you shorten the rod for more boost, until the spring isn't strong enough to hold the wastegate shut.
The -31 has a stronger spring than the standard actuators. My -31 runs at 25 psi, not on an A series though!
Using a bleed valve does reduce midrange torque I believe
Cheers,
Gavin :)

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so for instance it better to have a 12psi / 15psi actuator if thats what i want to run? rather than bleed it off?

well there are swings and roundabouts to this and many ways to plumb things in as most would agree!

in my book i would go for 8 psi actuator as standard kinda for going shopping etc.... and bleed the signal off to higher figures

for chav bashing

place a flow regulator choked down in between the pressure side take off from the turbo to the mbe
you still get the pressure to open the wastgate but..... with NO flow loss

also the benefit of this is you can adjust the mbe in very,.... small increments to increase boost, rather than winding it round and around to gain only a few pounds of boost

on my motor
from the 12 Oclock position to quarterpast its the scale

its 8psi shut, to a compleate blank on the actuator .....eech! at quarterpast

better to have an actuator near what boost you want to run as it will hold boost nicer than say a standard metro one with loads bled off

-31 is inches of some liquid in a tube

Metro turbo weekend driver,Mini turbo in the making again!

I agree with Steve .... go for about 8psi as that is sensible for day to day then use a plunger and spring type mbc as they only open when you get to the setting you want rather than constantly trying to bleed off. This means the boost rises better and gives more mid range.

Never been a fan of the constant bleed type devices.

Every day is a school day ...........

How fast and how expensive ...... the same question...

cheers chaps that clears it up, Steve again very sound advice an 8psi actuator it is. :)

Im running a standard 1275 and I have a metro actuator and a bleed valve to achieve constant 8psi.

If I fit the Maestro 2 litre turbo acuator. It will run 8psi without the bleedvalve and increase torque

If so I think this is a nessasary Upgrade!

-31 actuators will give 8psi with about a 1mm preload. Trust me i did it last week. I also know they will boost 28psi+. The only problem is the springs are so strong it's difficault to hook them over the wast gate (on a mini). I make the rod adjustable.
cheers
Roland

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