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R34 Gtr Greddy Profec B Ii Boost Controller Settings Need Help!

baicai

By baicai,
in Engines & Forced Induction

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baicai Community Regular

baicai

Posted
Posted (edited)

Hi guys, so my battery died today and once I jumped the car found the boost controller settings was reset. All I remember was that it was set on Hi setting with dyno sheet showin 19psi that was set by the tuner. Now I've searched the forums and google but couldn't find anything close to my setup. I have stock motor with cam gears, exhaust, haltech platinum pro ecu, -5 turbos. Was making about 290kw at the wheels.

Can any one with a similar setup help me with the settings? I've taken a wild guess below, are they close?

Set: 30%

gain: 10%

set gain: 100kpa(14.5psi)

warning: 150kpa (22psi)

limiter: 10%

last highest boost reading was 158kpa(23psi)

Any help would be much appreciated, as I don't want loose performance or blow up the motor, please help!

Edited by baicai
GTSBoy Grand Master

GTSBoy

Posted
Posted

You won't need to tune the engine, just need to get the boost controller set up again.

FWIW, the settings you listed above will probably get you most of the way there. Just make the Set value give you the max boost you want and adjust the gain value up or down to deal with boost rise or drop off in the top end. Adjust Set Gain to give you how aggressively it comes on.

Just make small adjustments and drive it around until you're happy with it.

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baicai Community Regular

baicai

Posted
  • Author
Posted

Thanks guys, gonna drive around with the basic settings then and ring the tuner on monday. Hopefully they have the settings stored on their computer. Just surprised the boost controller doesn't store settings with battery disconnected.

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

It does store the settings with power/no power, etc. I've had the same boost controller.

The control unit only has 2x wires for power, GND and IGN - there's no constant power.

You could easily figure out how to set it yourself, the lower the GAIN the "lazier" it comes onto boost, the higher the GAIN the "harder" it comes onto boost but will have the tendency to spike.

SET just determines how much boost you want to run, please note SET the scaling does not equate to any boost figure.

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baicai Community Regular

baicai

Posted
  • Author
Posted

Hi guys, so I spoke to the tuner and they were happy to help, we went for a quick drive and he adjusted the value within 5 mins and no charge as well. Seems my initial guess was close, set was bumped up to 37%, gain 20%, and limiter 5% so boost don't drop too much when it hits peak. I've recorded the values for future references.

Thanks to you guys for all the help!!

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