Paulo P

I'm looking for a -31 actuator for my 2 wheel drive cosworth and I'm getting confused I keep seeing -34 actuators for sale and I wondered if one of them would be better and if I could use one for a stage 1 conversion

Also what is the difference between 2 wheel drive and 4 wheel drive actuators?

Please help me because I'm confused

Thanks

Mark Barber

its all to do with poundage and how much boost you need -31 is for upto 330 bhp 2wd rods are different length than 4x4 good luck you need -31

Billabong

-31 has base lift off pressure of approx 8psi, -34 is 14 psi (that's minimum boost).

-31 gives a nice progressive delivery of boost, ideal for stage 1.

Paulo P

Thanks guys. I just need to find one now <---- real

I've been looking for a 2nd hand one for weeks but I keep missing them on ebay

pete mcrash

iTrader: (1)

...no...no is it f@*k...im runnin' 420bhp on a -31....

pete mcrash

iTrader: (1)

....u dont want a second hand on.... . phone m.s.d up they're not that dear...and then it's genuine

Mark Barber

it must be at full chat at that it will work better with -34 but its your choice im going off experience thats all at that boost he only wants stage one ???????????

pete mcrash

iTrader: (1)

...no trust me it's not...-31 has a stronger spring than a -34...but a -34 is compressed more so it holds on before it gives (1 bar ish)...a -31 lets boost flo sooner and holds it better....a-34 is for rally cars that have a bang....then tail off

Paulo P

I can't really afford a new one at the minute because I need to buy some other bits too The joys of cossie ownership

Jay,

iTrader: (4)

how does a 31 have a stronger spring when its only rated at 8 psi . The springs are alot weaker than a 34 , a 34 will peak and hold a lot better

paul send me ur addy and ill post u a 31 its used but will be fine for you stage 1 as ive just gone to a 34 actually just thought i have a 2wd 31 and a 34 4x4 spare

Christian and Beccy

iTrader: (14)

-34?? 14psi? PMSL.

I run a 24psi actuator now!!

Jay,

iTrader: (4)

fuckin show off

Christian and Beccy

iTrader: (14)

You should try and pull the rod out of that fucker.

Jay,

iTrader: (4)

yeh i bet mate

pete mcrash

iTrader: (1)

....-31 has something like a 100lb spring...a -34 only has something like a 60lb spring...but the -34 is compressed more so it doesn't let go till higher boost....sorry if im wrong..i better phone Ahmed up and tell him to shut his mouth.....

Adam_BlackRS

I used to use a foot pump on my -34... God knows how hard yours is

BigErn

I have a Forge actuator in the garage which has a white spring in it, supposedly for 23psi. Can I hell pull the rod out on it!!

Gonna put it on mine when I get the chance. Fook knows how Ill adjust it tho!

Fiecos Dan

a -31 is as mention'd a 8 - 10 psi actuator, and a -34 is a 14 -15 psi actuator.




i'm running a 28psi twin port actuator,

Mr S1

iTrader: (2)

If you can't afford to run a Cosworth properly....................then you can't afford a Cosworth mate. Not worth poncing about, buy a new one.

Taz

Paul

You have PM mate.

Graham

GARETH T

i just pump them up,, like i do when fitting any actuator

Fiecos Dan

Yep, mity vac's the way.

JTECH James

iTrader: (13)

so would i benift from fitting a -34 to my saff? i run 33 psi with a -31 at the mo, was a bit sceptical of putting that much tension on it tbh

pete mcrash

iTrader: (1)

...is ur car mapped or chipped??? if it's mapped u'll need to keep a -31 cos the boost will come in different with a -34....all i know is that at grove where i got my car done, they use -31's on much higher power cars than mine(420bhp) and if u read what i've wrote above,that'll explain what Ahmed told me about the two...i had a -34 and changed it .....Pete

JTECH James

iTrader: (13)

stu specced the chip ,so i guess i should run a -31 as thats what he said ,

foreigneRS

don't forget that in between the compressor and the actuator on most cossies is an SEM valve that has a restriction in it to create a pressure drop, so it depends on how that is ported as to what the actuator will do in reality