Tuning Greddy Profec B Spec 2

[IMR2T]

Who knows how to tune a Greddy Profec B Spec 2.

Would like to pick someone's brains as I turned mine down and its boosting higher, ha?!!

Cheers

[C35Rob]

What are your settings?

The manual is available on the greddy website btw, with thorough instructions how to set it up.

[IMR2T]

What are your settings?

The manual is available on the greddy website btw, with thorough instructions how to set it up.

Didn't know Greddy had instructions online. Will get a look.


Settings on Low are PSI

Vacuum - -97
Gain - 5%
Set Gain - 75(no idea what this is)
Warning - 95(no idea what this is)
Warning - L. 2%(or this
Peak 245

If I acclarate hard I'll easily hit 14,15 PSI. If I hold a positive boost after a few seconds the waste gate dumps it which I find confusing.

I just want it to peak at 10 and hold it.

[jimGTS]

warning 95 is likely to mean 9.5psi....

so whenever you hit 9.5psi the ebc will reduce boost by 2% (your other setting).

if you want to run 10psi, you need the warning at least around 12psi. and i would set the other warning to 5-10%

that peak is worrying, as that kinda indicated youve seen 24.5psi!

[IMR2T]

Big thanks for the settings

But if I floor it the thing holds boost to 15+ psi??

It only opens the wastegate if I hold the accelerator at part throttle?

Id have thought Id hit 10-12psi then the wastgate would open or is that not how it works?

[jimGTS]

standard the wastegate is set to open around 7psi.

the stock boost controller, or your one is used to fool this by bleeding off some air so its requires more boost to open it.


i would put every setting to 0.
or better yet even turn it off and see what boost your getting in 3rd gear from 2k-7k rpm.

are the same settings inputted on high and low setting??

with it turned off;
if it hits 7psi and slowly creeps to 14/15psi as the revs increase, then its simply boost creep and there pretty much nothing you can do about it (caused by a free flow exhaust setup). so 14/15psi will be the minimum you can run.

if it only creeps to 10-12psi, or even just stays at 7psi to redline, then thats ball park where you can start from and start messing with the controller.

"set" is a percentage, not psi/bar, start off small increments.
"set gain" this is in psi/bar, and is essentially when the controller starts to take over, used to bring boost in quicker. you generally want this 3psi below your target boost level.
"warning", this is in psi/bar, you want this about 2-3psi above where you want to run
the other "warning setting", in a percentage, so if boost gets to this 2-3psi above what you want to run, the controller cuts 5-10% of the controller to bring boost back down.

so first of all you need to see what is happening with the controller turned to the off setting (but still where you can read boost) to know where you need to start.

[C35Rob]

jim speaks the truth, however (no offence intended) it sounds like you're not sure of how it works or what the changes you're making are doing.

I'd A) turn it off completely, read the manual, use google to find out how it works, what the settings do and how it will effect the car then set everything to zero and set it up IAW the manual or B) take it to someone who can set it up properly on the road, or a dyno

[IMR2T]

standard the wastegate is set to open around 7psi.

the stock boost controller, or your one is used to fool this by bleeding off some air so its requires more boost to open it.


i would put every setting to 0.
or better yet even turn it off and see what boost your getting in 3rd gear from 2k-7k rpm.

are the same settings inputted on high and low setting??

with it turned off;
if it hits 7psi and slowly creeps to 14/15psi as the revs increase, then its simply boost creep and there pretty much nothing you can do about it (caused by a free flow exhaust setup). so 14/15psi will be the minimum you can run.

if it only creeps to 10-12psi, or even just stays at 7psi to redline, then thats ball park where you can start from and start messing with the controller.

"set" is a percentage, not psi/bar, start off small increments.
"set gain" this is in psi/bar, and is essentially when the controller starts to take over, used to bring boost in quicker. you generally want this 3psi below your target boost level.
"warning", this is in psi/bar, you want this about 2-3psi above where you want to run
the other "warning setting", in a percentage, so if boost gets to this 2-3psi above what you want to run, the controller cuts 5-10% of the controller to bring boost back down.

so first of all you need to see what is happening with the controller turned to the off setting (but still where you can read boost) to know where you need to start.

Jim this is phenomenal mate

I read the instruction manual but the experience insights youve offered here make all the difference. Thank you again!

[IMR2T]

jim speaks the truth, however (no offence intended) it sounds like you're not sure of how it works or what the changes you're making are doing.

I'd A) turn it off completely, read the manual, use google to find out how it works, what the settings do and how it will effect the car then set everything to zero and set it up IAW the manual or B) take it to someone who can set it up properly on the road, or a dyno

Hey Rob, no offence taken.

I dont know how it works exactly but Im keen to learn and with the info Jims presented Ill nail it.

Appreciate your concern big chap, thanks for your help also.

[Nails]

You can try these setting. These give me 0.9 bar on my greddy profec b spec 2 ebc. Might be close enough or at least ballpark figures to start with. This is on a rev 3 with a radtec charge cooler, berk decat, fjusibo legalis r and ARC box.

gain 15%
Set gain 0.75
I have warning at 1.20
L4

for 1.05 bar its
Gain 15%
Set gain 0.9
Warning and l are the same

[jimGTS]

Bare in mind nails has his profec setup for a bar reading, not psi.
Good thing about the profec is you can choose what measurement you want to run.

(14.7psi = 1bar)