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What I meant is that scanning without the laptop is useless because I can't see the wideband. The whole package isn't useless. In any case, after nearly two years, the issue isn't resolved, and...

I'm also curious about this. I have one of the scanners that isn't able to scan without a laptop, so I have to use the beta software, and then I can't use it for EIO which makes it useless. So,...

Thank you very much for your help. What you're saying makes sense and lines up with what others have said. Everyone tells me that my fuel system should be more than sufficient for what I need. If...

Thank you for the help. I'll give that a shot as soon as I can... probably won't be soon because of the stupid weather (rain). I did log the narrowbands next to the wideband when I installed it,...

Can you give me some pointers on what's wrong with it? I've been logging AFR error while forcing open loop mode with no LTFTs and just making adjustments based on that. I'm usually in the 0-(-4)%...

With the cooler air, I've had to adjust the tune. I made a pull earlier today with some of the timing taken out of the top end. The injector duty cycle got up to freakin 180+%. The car didn't lean...

Thanks for the replies. I'll go back to the tune and run some logs at my next track visit. I'll report back. :)

Hey everyone,

I am running a Procharged LS1 that is putting somewhere around 650 to the ground on 16psi. The fuel system consists of the following:

- dual Walbro 255L/h pumps
- -8AN feed line...

I am... that explains it. Thank you.

Hey all,

I have tried using the MPVI Pro device to do standalone logging, and it works, but it does not log the wideband or fuel pressure which are connected to the EIO. I loaded my...

Hey all,

I put together this spreadsheet to help me speed up the process of SD tuning. Basically, I set up the scanner to disable closed loop mode, drive around, and then I copy the % AFR Error...

Thanks for the help everyone. I have been fooling around with the tune, and it's slowly getting better, but it doesn't seem to be consistent. At times it seems rich in a cell, others it's lean. It...

Thanks for all the help, guys. I'm not sure how to tell if I can dial it in real-time, but it sounds easy enough either way. I will use the AFR Err % histogram to log my data.

Robby said to...

Thanks Robby.

If I turn off the LTFTs and STFTs and start tuning in open loop, then what should I be monitoring in the scanner? Is there another histogram that I should be paying attention to so...

Okay, so I failed the MAF (and physically unplugged it) tonight and started a log driving the car around (which seemed to drive pretty well, btw). I found that the LTFTs in the ranges I was driving...

I'll have to post the 3-bar when I get home.. it's definitely not here at work like the original tune is. Thanks for the suggestions on the timing. I have not yet read the sticky on teh 3-bar...

I've read about that, but what I'm wanting to know is what to do with the timing for the purposes of tuning safely. Can you give me some guidance on that?

I guess it's been too long since I looked at the tune. The commanded AFR, to my recollection, was 10.86 at every RPM in PE mode both in the logs and in my review of the tune. I guess my memory is...

Attached.

I'll have to post it up this weekend. I don't have it with me atm... However, I thought I would point out that I made some changes to the VE table in the 5500-6500 range and saw corresponding...

It's actually steady... my VE table jumps substantially as the RPMs increase on the 90kPa row and higher. Why bother changing this if it's based soley on the MAF over 4000RPM?

Hey all,

When I procharged my LS1 a couple years ago, I stuck with a 1-bar MAF tune at the suggestion of my tuner (after he found out I'd broken my 2-bar MAP the night before). So, I have that...

I'm sure the VE needs a ton of work. No doubts there. I just don't know at this point what to do with the spark table to keep things safe while I work on VE. Suggestions?

Thanks for the response. I guess I am not clear on OL/CL, then. I was under the impression that in CL, the computer used the MAF to measure airflow and that it only used the MAP and VE table to...

Hey guys,

I'm a total newb to tuning, but I think I am getting a general understanding of how it works. I have a Procharged LS1 pushing about 14psi, and it was (until yesterday) running on a...