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what boost will a -31 actuator produce???

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Old 05-11-2009, 04:34 PM
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B13 JUS
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Default what boost will a -31 actuator produce???

can anyone tell me what boost a -31 actuator will produce when you take the pipe from the turbo that controls the boost, so its getting full boost?
Old 05-11-2009, 04:46 PM
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the question doesnt really make sence mate,

if you mean a T4 with a -31, with a hole of preload, and pull the feed pipe off, it should make around 40-50 psi easily.

my own T4 car ran a -31 with a hole of preload, which is the most you should ever run , and had a nice 37psi peak, holding 32 to the limiter with no issues at all mapped on air injectors,
Old 05-11-2009, 04:49 PM
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Originally Posted by James @ M Developments
the question doesnt really make sence mate,

if you mean a T4 with a -31, with a hole of preload, and pull the feed pipe off, it should make around 40-50 psi easily.

my own T4 car ran a -31 with a hole of preload, which is the most you should ever run , and had a nice 37psi peak, holding 32 to the limiter with no issues at all mapped on air injectors,
kriky james thats must of been viscious on when it hit full boost
Old 05-11-2009, 04:58 PM
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Originally Posted by James @ M Developments
the question doesnt really make sence mate,

if you mean a T4 with a -31, with a hole of preload, and pull the feed pipe off, it should make around 40-50 psi easily.

my own T4 car ran a -31 with a hole of preload, which is the most you should ever run , and had a nice 37psi peak, holding 32 to the limiter with no issues at all mapped on air injectors,

why does the question not make sense???
you have answered my question.
you said (a T4 with a -31, with a hole of preload, and pull the feed pipe off, it should make around 40-50 psi easily).

and buy fitting a -34 with a hole of preload would that produce the same???
Old 05-11-2009, 05:14 PM
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if it wont make more than around 30psi with the pipe off on a -31, you have issues,

we map hundreds of T4 spec cars most on -31s and run over 30psi easily,

it would be unwise to even try to get more knowing there is a potential failure waiting to happen,

does your -34 work correctly? because the one we had on your car which you supplied didnt work it seems, as we had no boost control at all with it fitted

if you want us to give you a flat out T4 then fine, lets do it, but dont blame us when it goes bang!
Old 05-11-2009, 05:20 PM
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Originally Posted by creator
kriky james thats must of been viscious on when it hit full boost
hell yeah
Old 05-11-2009, 05:38 PM
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Originally Posted by James @ M Developments
if it wont make more than around 30psi with the pipe off on a -31, you have issues,

we map hundreds of T4 spec cars most on -31s and run over 30psi easily,

it would be unwise to even try to get more knowing there is a potential failure waiting to happen,

does your -34 work correctly? because the one we had on your car which you supplied didnt work it seems, as we had no boost control at all with it fitted

if you want us to give you a flat out T4 then fine, lets do it, but dont blame us when it goes bang!
i did'nt want to discuss my car on here thats why i pm'ed you.

yeah my -34 produces 40 psi
the actuator on my car was a old -31 when it came back down.
i removed the -34 because i was told you could'nt get the boost below 26psi.
now it won't boost more than 30psi, but does when i fit my -34.

all i wanted to know was, should a -31 produce more than 30psi with a hole of preload?

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Old 05-11-2009, 05:42 PM
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yes it deffo should do mate, mine would make in excess of 45 psi if we mapped it flat out on the A/I

i used exactly the same boost control as you have

yours is very fast at 30-31 psi, though!

Last edited by JTECH James; 05-11-2009 at 05:44 PM.
Old 05-11-2009, 05:50 PM
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infact, stu wanted to map mine with a 44psi spike, but i thought my diffs might complain

its alright for you, you have no grip

just seen the pm
Old 05-11-2009, 05:58 PM
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Originally Posted by James @ M Developments
yes it deffo should do mate, mine would make in excess of 45 psi if we mapped it flat out on the A/I

i used exactly the same boost control as you have

yours is very fast at 30-31 psi, though!
yeah it is quick, but need this problem sorting.

i just did'nt want to fork out more money on the turbo if there's nothing wrong with it.
Old 05-11-2009, 06:00 PM
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like we discussed mate, use it for a bit, and see for yourself the oil that appears in the inlet hose, im sure you have an issue developing in there
Old 05-11-2009, 06:01 PM
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Originally Posted by James @ M Developments
like we discussed mate, use it for a bit, and see for yourself the oil that appears in the inlet hose, im sure you have an issue developing in there
i've used it and the oil has'nt returned
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