Ok, if my PFC was tuned at 12.5 and 14.7 PSI in say 80/90 degree weather, would it be understandable for my turbos to creep just a little bit in say 30 degree weather due to the denser air, I have been noticing a little bit of creep since it has gotten colder here. Thank you very much for any help

 

Yep. You'll have to adjust the duty cycles a little bit. BTW, you aren't experiencing "creep", you are just experiencing elevated boost. "Creep" is when your wastegate is being overwhelmed and it's not possible to lower your boost any further.

 

I did not tune the car, it was tuned by don marvel and I would not know what to change the cycles too, could you explain a bit further on this for me

 

cloud,

on the power fc in the boost menu there are 2 settings. When you access that menu, one of those settings will be highlighted. That is the current active setting. look at the numbers to the left, those are the duty cycles. You will need to lower them. For example, when its cold out I set mine to 50 or 60. When its hot out I set it to 70 or 80. The numbers on the right are the actual boost BAR setting. Your PFC may looks something like this on those settings.

69 85
74 85

In that case change the 69 to 59 and the 74 to 64 and see if that helps. Keep adjusting till you get the boost you desire. Dont touch the boost setting.

Hope that helps, but im sure its confusion.

 

right now this is what the PFC reads in the boost setting

Pr. 0.80 kg/cm2 52%
Sc. 0.80 kg/cm2 50%

that is under the number 1 pre setting, but I have seen creep up to .87 with this, any advice on what to change it too, should I change the 52% to 42% and the 50% to 40%??? is this what you are talking about? thank you

 

am I completely misunderstanding this?

 

if you have 52 pct in your duty cycle and you are boosting to .87 and that upsets you, I would change my PR and SR to .75 and change the duty cycles to .55 and .49.

when it gets warm you will need to adjust again.

 

well am I even at any risk with the way it is tuned now? or am I just being parnoid

 

ok my settings on the PFC under boost are still these....

Pr. 0.80 kg/cm2 52%
Sc. 0.80 kg/cm2 50%

I am seeing boost spikes up to 1.01 bar when it is supose to be holding at .8, I mean I know SOME creep should be expected at times but that seems a little much too me, are there any other suggestions besides changing the setting to control the boost, anybody think any hoses for the waistgate could be loose?

 

where is it spiking? transition? Higher rpms?

to take some of the fear or trepidation out of driving the car, know that your PFC has map areas in the area that you are "spiking." It's still not good, but if it does hit that area, the PFC will add fuel and decrease timing better than the stock or rechipped ecu, decreasing the chance of doing damage to the engine.

Tim

 

it spikes at the higher rpms, and yes I know that the PFC adds fuel for these situations (thank god for that haha) but I would still like to know what I can do to reduce my boost spike, going from .8 to 1.01 on a spike sounds like a huge difference to me, someone please let me know what can be done thanks
-Nic

 

If you are getting spikes in the high rpm's then try turning the secondary duty cycle down. Kind of like this.

Pr. 0.80 kg/cm2 52%
Sc. 0.80 kg/cm2 45%