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How To Tune Greddy Profec B Ii?

Luke_GTS-T

By Luke_GTS-T,
in Engines & Forced Induction

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ashr32 Rising Star

ashr32

Posted
Posted
Hi guys,

I'm running a stock turbo in my gts-t r33. I wanted to set my hi setting to 11psi.

How can i tune my profec B II for 11psi???

Help greatly appreciated.

hey mate i hooked one of these up on a r33 last week. basically just turn the knob to increase the boost thats the set gain. its in % so stock is 7psi on a r33, at 0%. 10% should give you 7.7psi 20% 8.4psi and so on.

adjust the gain if your boost trails off at high rpm by default its 5% i think. i only needed to have 7% of gain

honestly just play with it a couple of % at a time with a mate in the car and find a nice open piece of road

REMEMBER: DONT BREAK THE LAW

SDEWY5 Community Regular

SDEWY5

Posted
Posted

your boost settiing is reliant on the percentage that you dial in, this will adjust your solenoid to open at a particular boost level. for 11psi you will need about 22-25% on a standard turbo. all you do is when its on turn the chrome knob to select the % thing. when u do this you will also have to change your overboost, hit select til it comes up red with either a Bar reading or number, ie:100. 100 represents 10PSI as it wont have the decimal place value. so 112 means 11.2psi. now this setting will probably want to be set around 120 or 0.85bar, watever values you have being displayed (ie:Psi or Bar). What this does is cuts your boost by a percentage that you have elected in the other settings. 10% will be fine for the overboost cut value. finally your gain is to help the response of your turbo spooling. it goes between 5% and 25%, the higher you make this the faster its meant to make your turbo spool, the lower the slower but positive aspect is it will help stop your car from overboosting.

JonnoHR31 Grand Master

JonnoHR31

Posted
Posted
hey mate i hooked one of these up on a r33 last week. basically just turn the knob to increase the boost thats the set gain. its in % so stock is 7psi on a r33, at 0%. 10% should give you 7.7psi 20% 8.4psi and so on.

its a percentage of the turbo or wastegates limit. 0% being stock boost and 100% is freeboosting

gain adjusts how aggressive the solenoid is. low gain will make it ease onto boost and drop off in the top end, too much gain will cause it to spike. takes a fair bit of playing around but once you understand whats going on you should be able to figure out what you want for this

start boost or set gain sets the boost at which the solenoid starts to open and feed pressure to the actuator, set this 1-2psi below the boost you want to run, setting it too high will cause it to spike

Luke_GTS-T Experienced

Luke_GTS-T

Posted
  • Author
Posted

Hey just had a look at my current settings, havnt been out to play wif em yet.

Hi:

Set: 34%

Set Gain: 65kpa

Warning: 90kpa

L.20%

Cars boosting to 73- 76kpa with this setting. Might lower the gain though, boost comes on to quick.

Just wondering whats the L.20% refer to?

Jaysiin Enthusiast

Jaysiin

Posted
Posted (edited)

my settings are.... (note: set to psi, not kpa)

low

gain 14%

set gain 75

warning 106

limiter 4%

set 36%

high

the same except,

set 39%

sometimes need to adjust slighty due to temps from night to day.

if someone has better settings for me, plz msg me

my mods are on my lil sig block.

Edited by Jaysiin
SDEWY5 Community Regular

SDEWY5

Posted
Posted
Hey just had a look at my current settings, havnt been out to play wif em yet.

Hi:

Set: 34%

Set Gain: 65kpa

Warning: 90kpa

L.20%

Cars boosting to 73- 76kpa with this setting. Might lower the gain though, boost comes on to quick.

Just wondering whats the L.20% refer to?

L20% means if your boost exceeds the set warning level it will drop 20% of your overall boost level ie: if warning is set to 10 and it exceeds this it will immediately drop 20% of the boost pressure (back to 8psi). Problem being if its not correctly set up it will continually jump up and down.

mine is set on 16psi (50%) 15% gain, overboost warning is 17.5psi and the boost cut is set at 7% (L7%). On my application this is perfect.

ashr32 Rising Star

ashr32

Posted
Posted
for everyone running a profec, wat are your settings?

well ill have to check when my engine is back together but the 3 values are 35% 35% and 10psi for the wastgate to open. this gave me a solid 12.5psi in forth gear.

its not an exact science ya just have to play around with it. temp plays a big part in it morning/afternoon so i have the hi/low switch set for the different conditions.

some people have the hi low switch set for different gears also.

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