No Device: How does PE Mode work
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Road Warrior
Joined: Mar 2013
Posts: 1,923
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From: Alorton, Illinois
How does PE Mode work
In regard to the OP and having a PV - PE is disabled during Auto tune by it setting the minimum rpm threshold to 12K ...so it ain't ever gone happen 
Mind you, I don't see the point of PE anyway ...doesn't kick in until 4800 rpm and 95% tps anyway ...and then it sets AFR to 12.1 for the first 16 seconds, and I have 12.1 in my AFR table up there anyway ...maybe useful for a race engine nailed to full throttle full revs for longer periods??
There are already acceleration/deceleration enrichment/enleanment tables that would be doing the accelerator pump bit
Mind you, I don't see the point of PE anyway ...doesn't kick in until 4800 rpm and 95% tps anyway ...and then it sets AFR to 12.1 for the first 16 seconds, and I have 12.1 in my AFR table up there anyway ...maybe useful for a race engine nailed to full throttle full revs for longer periods??
There are already acceleration/deceleration enrichment/enleanment tables that would be doing the accelerator pump bit
They aren't all set up that way, and there is conditions that need to be hit to get out of PE mode. So, if you are throttle jockeying and doing something like hitting it hard on the highway splitting cars and such. You will be running on PE fuel most of the time. This is were you want power and this table helps to enrich to achieve that power. Look at how the factory AFR tables are set up. Not the aftermarket. Just another table that adds flexibility to the one single calibration that is running the bike, and another example of how there is no such thing as a power calibration vs a fuel economy calibration.
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Road Warrior
Joined: Mar 2013
Posts: 1,923
Likes: 587
From: Alorton, Illinois
Not really even though it does enriches the mixture. Accelerator is there to add fuel to compensate for a quick throttle change. This could be 10% to 20% that might move kpa from 50-80kpa. It will work through out the entire AFR table. PE is more for the extreme right side of the table.
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Road Warrior
Joined: Mar 2013
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From: Alorton, Illinois
IME when reading these forums. It seem like tables that aren't understood are always explained as not needed. Cam tune, EGR, closed throttle spark........ even closed loop. Good news is. The more knowledge that is exposed over these tables. The more people understand them. The more they adjust and the better the tunes become.
Road Warrior
Joined: Jun 2015
Posts: 1,325
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From: Edinburgh UK
I wasn't trying to summarily dismiss it just because I didn't know what it was, just I couldn't see the point, because I didn't know what it did ...and neither did WOC so what chance do the rest of us have 
Now that I've read up I realise that I've not seen a proper simple explanation...
PE is NOT about enrichment " TO GET MORE POWER" again its rather poorly labelled, its extra enrichment and spark adjustment intended to help cool the engine "DURING SUSTAINED HIGH LOAD PERIODS"
Wherever you have it configured it overrides the AFR table rather than being a fuel addition, like the Accel Enr table.
Stock 2014 map it only kicks in above 4800 & 95% throttle and only adds fuel without changing any timing.
Knowing what these things do or are for, in words we understand are hugely useful ...which was the point of Steve's thread.
Sorry to the OP for the hijack, not really sure how we ended up on PE ...my fault.
Maybe Mr Wizard could cut these last few posts and pop em in the HD/Delphi thread if more appropriate
Now that I've read up I realise that I've not seen a proper simple explanation...
PE is NOT about enrichment " TO GET MORE POWER" again its rather poorly labelled, its extra enrichment and spark adjustment intended to help cool the engine "DURING SUSTAINED HIGH LOAD PERIODS"
Wherever you have it configured it overrides the AFR table rather than being a fuel addition, like the Accel Enr table.
Stock 2014 map it only kicks in above 4800 & 95% throttle and only adds fuel without changing any timing.
Knowing what these things do or are for, in words we understand are hugely useful ...which was the point of Steve's thread.
Sorry to the OP for the hijack, not really sure how we ended up on PE ...my fault
.Maybe Mr Wizard could cut these last few posts and pop em in the HD/Delphi thread if more appropriate
Road Warrior
Joined: Jun 2015
Posts: 1,325
Likes: 140
From: Edinburgh UK
Maybe 16 onwards? ...I don't remember seeing or finding much about PE so wondered if a new thread on How does PE work and when would you use it might be interesting if anyone wants to discuss further, otherwise just leave it, a bit of off topic never hurt anyone
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Road Warrior
Joined: Mar 2013
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From: Alorton, Illinois
Something to keep in mind about PE mode, and what it can do for us. I picked CAA009 from TTS file for example. I just picked one.
W/ PE mode not activated:
Riding your fully loaded bagger w/ rider on back. You're cruising 85mph down the highway. You open WOT to climb a hill. At first you will go up to 100kpa and you will be in the target area of 856/ 12.7:1. But as RPM's go up. KPA is going to drop. If it drops back to 85kpa @ 4500rpm. Now you are going to be in the target area of 899/13.2. Target AFR is by KPA and not throttle position.
W/ PE mode activated:
Same scenario but now with PE mode activated it is going to stay at the target in the PE table. So, KPA drops. It isn't going to lean out.
Power Enrichment as it is labeled.
W/ PE mode not activated:
Riding your fully loaded bagger w/ rider on back. You're cruising 85mph down the highway. You open WOT to climb a hill. At first you will go up to 100kpa and you will be in the target area of 856/ 12.7:1. But as RPM's go up. KPA is going to drop. If it drops back to 85kpa @ 4500rpm. Now you are going to be in the target area of 899/13.2. Target AFR is by KPA and not throttle position.
W/ PE mode activated:
Same scenario but now with PE mode activated it is going to stay at the target in the PE table. So, KPA drops. It isn't going to lean out.
Power Enrichment as it is labeled.
Last edited by hrdtail78; Aug 19, 2016 at 05:35 PM.
