tuning higher rpm range

[9c1vs]

I downloaded the BAYA bin. Is it the $5D XDF that is required to view it?

[Dylan]

Nah $DB

[9c1vs]

Had a bit of a look, the vn group a tune certainly has a lot more timing in it as expected. The ve table also looks quite interesting, it peaks higher than I thought it would. Quite clearly being 5ltr rather than 5.8 and the twin throttle body manifold makes quite a difference. I might use this as a bit of a guide for when I put the torque power manifold on as it has shorter and wider runners like the group a manifold when compared to the std one I have now.

[9c1vs]

I think I am getting there with this tune. The main cruising areas of the table are starting to come together, most places are around 14-14.7:1. I have been trying to get them round 14:1 at least, knowing that closed loop operation will trim fuel as necessary. There are a couple of cells that must still be a tad lean as I see the wide band dip into the 15s on occasions.

Also, I had a play with AE as I noticed the AFR was dipping to 10-11:1 most times I accelerated. I dropped the mulitplier and took some out of the AE gain v delta manifold fuel.

Its still a bit rich in areas of acceleration, ranging from 11:1 to 12.5:1 and going as low as 10:1, but that might just be the AE.

I tried putting some more timing in but noticed some knock counts appear so I backed it off and will continue to try and refine the ve table.

One thing I did notice was that the BLM count is always 100. I thought this was a bit strange as I know the map is not perfect so I was thinking there would probably be some values show up. I turned the closed loop back on and ticked narrow band ve learn, but are there other parameters I need to check for BLM?

[Dylan]

You want the wideband to go rich when you first accelerate for a second. And given the stock intake manifold it woud be best to adjust the rpm multiplier table before the manifold fuel.

[9c1vs]

cool no worries, its still going rich which is good. I think it was going too rich initially as the wide band went all the way to 10:1 and I could feel it stumble if I hit the gas too hard.

As for the BLM, should I be seeing numbers? It seems odd that the ecu would not be implementing any LTFT, considering I am sure it is not perfect.

[Dylan]

Maybe you have forced open loop? Or you have no narrow band connected?

[9c1vs]

i did have open loop forced for when I was tuning the main map using the ve calculator. I have since turned it back on and it goes into closed loop on the dash board. The narrow band is connected and working as I see the voltage changes. The STFT is working as I can see when it is operational on the dash board. But for some reason it is not doing any long term fuel trim?

[antus]

Be carefull with ve learn, do download and recheck your maps. Depending on how your driving it can make more of a mess than do good. It sounds like your tune is close enough that I would avoid it.

[9c1vs]

Thanks antus, yes I experimented with ve learn and indeed it made a bit of a mess. I made a few changes around where it idles that were counter productive and the ecu made BLM changes, so it does work, I must just have the tune pretty close. I have subsequently reversed the changes around the idle area of the map!