How low do you other folks have your PE engaging vs TPS?

I have been steadily dropping mine and liking the results thus far.

Just trying to get a feel and see where everyone else is running theres at

later
Jeremy

 

On the GN I have it down into the 20% range. It spools and starts making serious power at such small throttle openings it's needed.

On the truck I think I'm at 40% or so.
I had it lower in the truck but going into a serious wind with the car and trailer I was in PE for like 300 miles, and that hurt the mileage, some.........

As you get more and more familiar with the WB it'll get more and more clear about where you are with PE, and AE. This is where the bargraph pays off big time, IMO. Trying to replay dat logs are OK if you can really remember all the details of the log. Some stuff just takes practice to get Correct.

 

FWIW, the late stuff OBDII doesn't use any AE from what I can tell, just a low PE enable.

They must be handing some other stuff differently, but interesting.

 

Another aspect of this is to run open loop and no PE. By running open loop the AFR can be ramped in as the MAP increases. Works out nice. Best part I like is that it is a smooth application of power, not a sudden switch as the AFR changes into PE mode.

RBob.

 

It is interesting. I removed all AE from my bin while testing things a few weeks back. Car actually ran better, but the transition from normal driving to PE was too harsh, which would cause inconsistant results.

I hadn't thought of lowering the PE tps threshold. Guess I'm stupid.

my tps threshold is 70%.

-- Joe

 

I set PE to engage the smoothest. In the upper rpms, lower tps settings are better because there is "less slack in the pedal". THe other thing I do is to make sure PE threshhold is high enough to not engage under normal driving. I don't think AE matters much for my car. THe 3500stall seems to eat up that initial AE. To me, AE is for off idle or cruise situations...

 

Just looked at the truck .bin, it's 45%.

Drives well. Makes towing a breeze...........

 

Like many of you mentioned I just have that on/off sensation and some knocking under areas that I believe could be covered dropping the PE vs TPS a bit.. medium to hard medium pulling without really getting into the WOT area... especially as the rpms climb into the upper 2k and into 3k range...

Have yet to have time to datalog/scan and romulate with the wideband to see what helps/worsens which

VE tables in the area are amazingly well very near the 14.7 range, thought about changing that as well........

Rbob, the open loop issue is one which i hope to have time to explore again very soon :-) (get me an inverter) But i want to be able to dedicate at least a pure day to play and see what i can end up with...

later and thanks
Jeremy

 

Open loop is nice. I didn't set out to run open loop, it just happened. To do the final tweaking of the VE tables I forced open loop (increased closed loop coolant enable threshold). And used the WB reported AFR vs. commanded AFR to finalize the VE table and AE. Once it was there the engine ran so well I just left it in open loop.

Someone else just this weekend posted that they too are staying with open loop. NB O2 sensors are a funny thing and don't always work out.

{edit} novass and here is the thread:

https://www.thirdgen.org/techbb2/sho...hreadid=246704

RBob.

 

Yup..
Really like the results of open loop and how it's running!

 

I have mine at
400 60%
1200 60%
2000 55%
3200 36%
4800 26%

But something isnt right..... under acceleration today Datamaster showed
100% TPS and 3.7 Volt TPS (shouldnt 100% be near 5volts??) at 2500 rpm and NO PE!?. This I know becaurse I had more Spark retard than I have in MAX Pe spark retad in the PROM......

 

i looked at my PE/RPM enable yesterday. i changed it from 85% where it was(stock?) for 400-3200 rpms to 75%. i will interpret SOP effect and drop again and again till about 50%. i dont think i changed the 4800 as it was already at 45% or so if i recall. WB still not installed/ bung in however.