Power FC Boost settings? Changing duty cycle? - GT-R Register - Official Nissan Skyline and GTR Owners Club forum

brett21 · 4th August 2008, 05:35 PM

I have noticed that my settings have changed in the boost settings, When Abbey mapped it it only had 2 settings, one at 1.15 & two 1.20, now there are two more appeared & the duty cycle has changed, i have done a search, i cant find enough info to understand it clearly,,

Here is a pic of my FC, From what im understanding it self learns to be more smoother the more you drive, what does it do if you change the cycle settings?

[IMG]

[/IMG]

frostmotorsport · 5th August 2008, 03:26 AM

dunno - but I would assume changing the duty cycle settings will change the way it builds boost and the max boost it allows - but I will let other more expert people comment on that.

what I have read on here is that after a while, the PFC boost goes "soft" and resetting your duty cycle settings will sort it out and return your boost to its original glory!

kismetcapitan · 5th August 2008, 04:20 AM

that's self learning - smoother is one way to put it. I personally feel that the boost builds less aggressively, so I routinely reset it. If you wanted to, you could change the "26" to "28", and then back to "26" - you'd have the same exact boost setting, but the self-learning would be erased. The boost solenoid would then be more aggressive until it learns to hit the preset boost level more smoothly.

Wow, your duty cycles...mine are set around 80!!

UKPAISLEY · 5th August 2008, 09:27 PM

Duty cycle is the frequency in short bursts that the sol has to perform, think of it as walking up a a set of stairs, one at a time and it takes a long time to get to the level you want. Larger cycle take 3 steps at a time, you get there faster, but you might over shoot and then you have jump back again. Too smaller steps and you never get to the level, too bug and youre boost will occilate and not level out.

markM3 · 5th August 2008, 09:48 PM

Everything you need to know here -see 'How to configure optional boost control kit'

http://paulr33.skylinesaustralia.com...owerfc-faq.htm

the end fig starts at 255 and is self learn. fig before that is the solenoid duty cycle and the higher the figure the higher the boost - yours is all topsy turvy!!

Cheers,

brett21 · 7th August 2008, 06:48 AM

Thanks guys, that has been lots of help, I had a play the other night, i can now set it up just how i like it,

topsy turvy! I havent heard that saying for a while,

4th August 2008, 05:35 PM	#1 (permalink)
brett21 GTROC Member Join Date: Apr 2005 Location: Surrey Posts: 351	Power FC Boost settings? Changing duty cycle? I have noticed that my settings have changed in the boost settings, When Abbey mapped it it only had 2 settings, one at 1.15 & two 1.20, now there are two more appeared & the duty cycle has changed, i have done a search, i cant find enough info to understand it clearly,, Here is a pic of my FC, From what im understanding it self learns to be more smoother the more you drive, what does it do if you change the cycle settings? [IMG][/IMG]

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5th August 2008, 03:26 AM	#2 (permalink)
frostmotorsport GTR Register Member Join Date: Aug 2007 Location: Wellington, NZ Posts: 767	dunno - but I would assume changing the duty cycle settings will change the way it builds boost and the max boost it allows - but I will let other more expert people comment on that. what I have read on here is that after a while, the PFC boost goes "soft" and resetting your duty cycle settings will sort it out and return your boost to its original glory!

5th August 2008, 04:20 AM	#3 (permalink)
kismetcapitan GTR Register Member Join Date: Nov 2005 Location: Seoul Korea Posts: 6,401	that's self learning - smoother is one way to put it. I personally feel that the boost builds less aggressively, so I routinely reset it. If you wanted to, you could change the "26" to "28", and then back to "26" - you'd have the same exact boost setting, but the self-learning would be erased. The boost solenoid would then be more aggressive until it learns to hit the preset boost level more smoothly. Wow, your duty cycles...mine are set around 80!!

5th August 2008, 09:27 PM	#4 (permalink)
UKPAISLEY GTR Register Member Join Date: Jan 2003 Location: NORTH EAST Posts: 292	Duty cycle is the frequency in short bursts that the sol has to perform, think of it as walking up a a set of stairs, one at a time and it takes a long time to get to the level you want. Larger cycle take 3 steps at a time, you get there faster, but you might over shoot and then you have jump back again. Too smaller steps and you never get to the level, too bug and youre boost will occilate and not level out.

5th August 2008, 09:48 PM	#5 (permalink)
markM3 GTROC Member Join Date: Jan 2008 Posts: 199	Everything you need to know here -see 'How to configure optional boost control kit' http://paulr33.skylinesaustralia.com...owerfc-faq.htm the end fig starts at 255 and is self learn. fig before that is the solenoid duty cycle and the higher the figure the higher the boost - yours is all topsy turvy!! Cheers,

7th August 2008, 06:48 AM	#6 (permalink)
brett21 GTROC Member Join Date: Apr 2005 Location: Surrey Posts: 351	Thanks guys, that has been lots of help, I had a play the other night, i can now set it up just how i like it, topsy turvy! I havent heard that saying for a while,