How are most disabling PE mode in HPTuner (when SD tuning) ???

Setting the MAP entry point to 100 for PE enable???

 

i personally dont...i tune in open loop SD...pe is open loop so in my eyes its all the same...in the end your tuning the ve for a specific # whether that # is 13.0:1 or 14.7:1 the computer shouldnt care.

 

Ah... that is true... did not think of it that way...

Thanks,

 

Just set all your PE cells to 1.0

 

Why would I set them to 1? As long as I am logging the commanded AFR (I use high res) PID and my WB, the scanner will report the AFR % error between the two... I don't really care what the PE modifier is as long as the AFR commanded and WB agree...

 

lol hey but you asked how to do it...thats how...i just told you WHY I dont lol

 

Thanks foff667, I didn't know how to respond nicely.

 

 

I was not asking you foff667 I was asking dynocar, sorry for the mixup. I still did not get an answer from him/her but maybe that is because the situation changed behind the question.

Given we (I) do VE/SD tuning in OL and PE is OL why would I want adjust my PE modifier to 1? As I stated above, "As long as I am logging the commanded AFR (I use high res) PID and my WB, the scanner will report the AFR % error between the two... I don't really care what the PE modifier is as long as the AFR commanded and WB agree..." Correct???

 

can you take it now dc I'm now not sure how to respond nicely

 

Then don't say it nicely... Why would I set my PE to 1, given the above example? So much for the forum being a place for the open exchange of information... They are just questions guys calm down....

 

when you say it like this it can come off a bit harsh...i knew you werent asking me but your origonal question was how to turn off pe...he gave you the answer. Then you asked him a question that I would be asking rather then you.

 

To awnser you question about why to set pe all to 1. It because it will no longer do any thing because its a multiplier and if you multiply or divide some thing buy 1 you get the origanl number there for turning it off.

 

LOL... one more time...

As long as I am logging the commanded AFR PID and my WB, the scanner will report the AFR % error between the two... I don't really care what the PE modifier is as long as the AFR commanded and WB agree...

I know what the modifier does. I just don't see the reason to reduce the PE to 1, when the scanner knows what the commanded AFR is (modifier OR not) and what the WB AFR is, and compares the two error an %....

 

I think having a consistent afr is probably a little more accurate as the WB and the engine wont always transition the cells at exactly the same time, when in a constant state sure, but with wide throttle variations or stop start traffic maybe not.
Thats why you should filter out TPS changes etc. But if you want super accurate, then I think running a single AFR over the whole map might be better.

 

Ringram hit the nail on the head IMO. The reason why people would choose to disable PE is because you aren't always gonna be transitioning into it at exactly the same conditions every time.

The reason why I leave PE enabled on my car is because the PCM does some backcalculating of some sort based on the commanded AFR. To give you an example...tune your entire VE table to 13.0:1. Then command stoich (but leave it open loop). It won't quite get there (although it should).

If PE bothers you, just filter it out by making a filter that only displays values for cells where the commanded AFR is above 14.6 or something. I just feel safer with it there to throw in fuel as needed should my foot get heavy.