ctuinstra
Goblin Guru
Sorry, that's not yours. That's a downloaded file.
Remote tuning
- Thread starter Ross
- Start date
Ross
Goblin Guru
Good to know. Thanks Chad.
I notice that a lot of tunes just blank out (or set to 1x) the whole table. Defeats the whole purpose of the table!
Yes you can still get it to run by adjusting the VE and MAF tables, but when something changes the engine won't be able to compensate.
If your whole flow rate vs KPA table is 62.5 lb/hr, and you tuned the engine on a low pressure day, the engine can't compensate for a high pressure day.
If my whole "Flow rate multiplier vs Volts" table is set to 1.56x, then the engine can't compensate for different voltages.
Anyhow, I was hoping to tune my "Flow rate vs KPA" table, by starting with a properly tuned stock engine, then changing only the injectors, and modifying the "Flow rate vs KPA" table with any wideband O2 errors that I logged.
ctuinstra
Goblin Guru
The stock Flow Rate Mult vs Volts is set to 1.0 in all cells. So it's not really being used in stock form. Typically it's only going to run on the last two cells, 12 and 13V. You could adjust those below it some if you really wanted.
That table is adjusting for the flow rates at different manifold pressures, not necessarily ambient baro pressures. As ambient baro pressures change, so will the manifold pressure which is what the fuel pressure regulator is referencing and adjusting the fuel pressure. So the boost pressure regulator basically negates the reason for having a table (range) and could get by with just a static value.
Ah! If only all of this were that easy it would take all the fun out out it! The Flow rate vs KPA would be best to determine using calibrated flow equipment. But for some reason trying to get that information is next to impossible. The info I got for my injectors didn't fit my tables and rendered it useless. The tuner I was using seemed to be in the know about a lot of the injector companies and he was telling me how Injector Connections basically just stole the information from other injector companies and didn't do their own flow testing. Which I would believe after trying to engage in a technical conversation with them.
SACTX
Well-Known Member
I ended up getting HP Tuners because of the work I was going to be doing and worked on Jason's car (transferring a tune). I just changed plans and will be adding a HTV1320 once I'm running and stable. I have been looking through posts on HPT forums and looking at tuning videos. You can be sure I'll be following this thread as well and it's comforting to know we have a few gurus in the group...
95Blitz
Well-Known Member
Not yet maybe in a few weeks.
ctuinstra
Goblin Guru
I’m looking into that.
Ross
Goblin Guru
This might not be the minimum list, and it is for my 2006, but here is the PIDs that I log:
Karter2026
Goblin Guru
Ross,
I will email you over the PID's that zzp zent me with the lay out they sent. It has some different stuff in it. The forum will not let me post them here.
Ross
Goblin Guru
Ron, The PIDs you sent me were for your 2009 2.2 LT? Do you have a log file? This forum supports *.hpl (log files) and *.hpt (tune files).
Your car has a lot of PIDs that aren't available on my 2006. Would be nice to have oil pressure, oil temp, etc. All the grayed out ones aren't available to me, and even some black ones (like Engine Oil Pressure) don't work on my LSJ, as the 06 engine only has an oil switch, which turn on the idiot light below a preset oil pressure (25 PSI?).
Anyhow, I am including 3 screen shots of the PIDs, as it is a good example of things to log.
I zipped up the files you sent me, and added an .hpl extensions (to trick the forum) so I could post them here, and people can download your PID settings for VCM Scanner.
Your car has a lot of PIDs that aren't available on my 2006. Would be nice to have oil pressure, oil temp, etc. All the grayed out ones aren't available to me, and even some black ones (like Engine Oil Pressure) don't work on my LSJ, as the 06 engine only has an oil switch, which turn on the idiot light below a preset oil pressure (25 PSI?).
Anyhow, I am including 3 screen shots of the PIDs, as it is a good example of things to log.
I zipped up the files you sent me, and added an .hpl extensions (to trick the forum) so I could post them here, and people can download your PID settings for VCM Scanner.
ctuinstra
Goblin Guru
A standard basic list is a good idea. The first one Ross posted is a great start and as he mentioned, different cars have different PIDs available to log. After connecting to the MPVI2 the first time, you can scan for the PIDs that are available. As much as one would like to just scan everything, you can't have your cake and eat it too. The more PIDs, the more data that has to be captured. The more data that has to be captured, there is a delay and limit to the amount of data. In best practice, scan all that you need but not everything
ctuinstra
Goblin Guru
Just downstream of the existing O2. Sorry I don’t have a photo yet. Look under the DF exhaust and you see it on the driver side of the inlet pipe.
Ross
Goblin Guru
Here is some pics with the parts off my car. The 2 bungs are only 6 inches apart, and you could put them in either spot,
but I left the stock O2 sensor in the stock location.
The exhaust manifold (or header) gets the stock chevy narrow band O2 sensor.
The muffler gets my wideband. (Right side of pic)
Or the arrow in this picture, as viewed from under the muffler.
but I left the stock O2 sensor in the stock location.
The exhaust manifold (or header) gets the stock chevy narrow band O2 sensor.
The muffler gets my wideband. (Right side of pic)
Or the arrow in this picture, as viewed from under the muffler.
Anks329
Well-Known Member
Weird... there’s no spot for a sensor in the manifold. I’ve got a spot in the DF exhaust where I have the narrowband stock sensor in place. Looked at the donor pictures as I was taking it apart, and the exhaust itself had two sensors, one before and one after the cat converter. I guess the LS model is different than the the other models?
Ross
Goblin Guru
My SS had two stock O2 sensors as well, but since we don't use the cat converter, there is no purpose in having a sensor after it.
The stock engine would add fuel if the post cat O2 sensor was detecting fumes, as this allowed the cat to get hotter, and work correctly.
I have disabled this in HP Tuners.
The stock engine would add fuel if the post cat O2 sensor was detecting fumes, as this allowed the cat to get hotter, and work correctly.
I have disabled this in HP Tuners.
k.rollin
Goblin Guru
The base models did not have a bung in the exhaust manifold. See attached.
