-31 actuator - Different ratings?
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I am about to purchase a -31 actuator for use on my cossie 4x4 turbo (which didnt have one with it)
I need to know if they made them with different spring ratings. My plan is to have a base setting of 14psi going up to 18psi.
The part number (garrett) that i am about to buy is 430099-0031. i have been told that they did them in 4psi, 7psi, 10 and 1 bar, bit confused to be honest and a search doesnt reveal the specific information i'm looking for.
TIA
Gareth
I need to know if they made them with different spring ratings. My plan is to have a base setting of 14psi going up to 18psi.
The part number (garrett) that i am about to buy is 430099-0031. i have been told that they did them in 4psi, 7psi, 10 and 1 bar, bit confused to be honest and a search doesnt reveal the specific information i'm looking for.
TIA
Gareth
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Not sure about some of what you say, the -31 is approx 7psi on half a hole preload and the -34 is approx. 14psi.....
Im assuming you have a suitable chip to allow the boost over standard?
Ive heard it reported the -34 tends to bring the boost in with more of a punch as the wastegate stays closed longer. Bare this in mind.
Im assuming you have a suitable chip to allow the boost over standard?
Ive heard it reported the -34 tends to bring the boost in with more of a punch as the wastegate stays closed longer. Bare this in mind.
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Direct off of the plenum chamber to actuator. I may be using a GBE boost control valve after setting the actuator to 12 psi.
CosRush, Turbo is going on a Maestro Turbo which has a 1.5 Bar map sensor and no boost cut
You should remember me as you sold me your old T3 4x4 turbo
CosRush, Turbo is going on a Maestro Turbo which has a 1.5 Bar map sensor and no boost cut
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MGTurbo,
My plan is to have a base setting of 14psi going up to 18psi
My plan is to have a base setting of 14psi going up to 18psi
Stu @ M Developments,
The -31 is the part number of the SPRING and they lift around 8psi.
You want a -34 if you want a lift rate of 14 psi.
The -31 is the part number of the SPRING and they lift around 8psi.
You want a -34 if you want a lift rate of 14 psi.
MGTurbo,
Have now purchased said -31 and look forward to the results..
Have now purchased said -31 and look forward to the results..
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Originally Posted by Stu @ M Developments
MGTurbo,
My plan is to have a base setting of 14psi going up to 18psi
My plan is to have a base setting of 14psi going up to 18psi
Stu @ M Developments,
The -31 is the part number of the SPRING and they lift around 8psi.
You want a -34 if you want a lift rate of 14 psi.
The -31 is the part number of the SPRING and they lift around 8psi.
You want a -34 if you want a lift rate of 14 psi.
MGTurbo,
Have now purchased said -31 and look forward to the results..
Have now purchased said -31 and look forward to the results..
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The gearbox is the weak point on my car and anything i can do to smooth out the power delivery is going to help long term. A softer actuator which the -31 appears to be, will give me steady boost (i currently have dropping off problems except in 5th where i get boost creep
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To be honest my current actuator is 15 years old and well past it. I just wanted something thats going to do what i want with some added flexability, say, if i want to run 10psi and increase the boost to 15psi with a Dawes type device.
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MgTurbo,
Yes i do remember, hows things???
Personally i would have followed stu's advice, as the -34 should will allow you to bleed less air off to get your desired boost.
Otherwise with the -31, you'll be wasting 11psi or so bleeding it away....
Why dont you get the -34, and try it....if you dont like it, i would swap my new -31 Garret for it, as i'd prefer a -34 myself.....as im running 24psi held......
Let me know what you think...
Yes i do remember, hows things???
Personally i would have followed stu's advice, as the -34 should will allow you to bleed less air off to get your desired boost.
Otherwise with the -31, you'll be wasting 11psi or so bleeding it away....
Why dont you get the -34, and try it....if you dont like it, i would swap my new -31 Garret for it, as i'd prefer a -34 myself.....as im running 24psi held......
Let me know what you think...
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MGTurbo,
i currently have dropping off problems except in 5th where i get boost creep )
i currently have dropping off problems except in 5th where i get boost creep )
That is EXACTLY why you i said you dont want a -31 for 18psi with no additional boost controller as 14psi requires around 18psi base load and a -31 is no good at all for that. Also, how do you plan to use a Dawes device to make your boost LESS aggressive? Its whole point is to make the boost come in harder with no gate creep.. same as fitting a -34 as its simply a pressure relief valve.
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Originally Posted by Stu @ M Developments
MGTurbo,
i currently have dropping off problems except in 5th where i get boost creep )
i currently have dropping off problems except in 5th where i get boost creep )
That is EXACTLY why you i said you dont want a -31 for 18psi with no additional boost controller as 14psi requires around 18psi base load and a -31 is no good at all for that. Also, how do you plan to use a Dawes device to make your boost LESS aggressive? Its whole point is to make the boost come in harder with no gate creep.. same as fitting a -34 as its simply a pressure relief valve.
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I wasnt saying the Dawes device would make the boost less aggressive, i have had experience of a few before and found very little if at all detectable difference in the way boost comes in. I suspect the boost still wont be quite as aggressive as a -34 outright though?
I guess the use of a bleed valve would eliminate this problem, however i have no way of fitting one without also bleeding off the air going to the fuel pressure regulator so thats a no no. Last thing i want is higher boost and LESS fuel
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Not trying to hijack this post but how would an electronic boost controller figure into this? I used (Greddy Profec B) them in the past with very good results but never on a Cosworth. What is the advantage/disadvantage to using an electronic controller rather than an uprated actuator?
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