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Greddy Profec B Spec 2 Ebc Help...pls

L!sa

By L!sa,
in South Australia

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L!sa Apprentice

L!sa

Posted
Posted

i just brought a r34 gtt :) everything all stock but its have a Greddy Profec B Spec II, the old owner set on 14 psi with power fc but he took the power fc with him :P so now just run stock computer, can anyone help me to set it to 12 psi pls (now im broke by brought this car dnt have cash to go dyno yet :P i knw its sound stupid but...)

now my setting are

Gain 15%

Set Gain 0.85

Warning 1.30

Warning L.20

_______ 3.06

Peak OFF

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https://www.sau.com.au/forums/topic/259919-greddy-profec-b-spec-2-ebc-helppls/
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Race__24 Experienced

Race__24

Posted
Posted (edited)

I'm not familiar with that particular model but reducing the gain will reduce your boost. Take 5% of and see how that goes. I'd recomend only running a max of 11psi for stock turbo and computer, 10psi if it's your daily.

For more information on the unit do a search, there will be plenty of threads on here about it

EDIT- I think it's the set gain that you want to adjust, just lower that and see what happens. From what I just read the %gain is to do with how fast the actuator opens and the set gain controls your overall boost

Edited by Race__24
and3_3 Proficient

and3_3

Posted
Posted

without pushing any buttons just turn the knob anti clockwise a little bit that will reduce the overall pressure, the gain is about the consistency.

You can download the manual for it too, that will help you understand it.

Krishy Grand Master

Krishy

Posted
Posted

or the best thing is turn the boost controller off

it will revert to stock boost once its turned off (stock or whatever the wastegate/actuator is preset to)

but to get the boost down

i would be turning the Gain and set gain down a bit

there is a few threads on how to adjust the profec B's

good luck with it all

Krishy Grand Master

Krishy

Posted
Posted

you can change it from kPa to PSI

once it goes into psi it doesnt say 10 psi

it will say 100 and thats it

so its whatever psi multiply by 10 and thats what you see on the display

really the only way to do it is to have someone in the passengers side to keep and eye on things

and you just drive hard in 2nd or 3rd gear on a private property

FLN75S Mentor

FLN75S

Posted
Posted

Have you tried turning the knob on the right side of the boost controller and if so what percentage does it read as this is needed to be turned down also to reduce the boost. Also if it is the standard computer and turbo the max you would want to run is 10psi mainly because you are likely to hit boost cut if you try running anything higher.

Also have you been able to change the settings so it reads PSI? if so what does it say your running on hard acceleration?

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