dr_sharp Posted January 9, 2011 Share Posted January 9, 2011 I did a brief search and came up mostly empty handed. How does one go about properly scaling an intake? Also, if I swap intakes and properly adjust the scaling, will a re-tune still be necessary? lol Link to comment Share on other sites More sharing options...
dr_sharp Posted January 10, 2011 Author Share Posted January 10, 2011 Or is adjusting the scaling considered re-tuning? I'm new at this... baby steps. lol Link to comment Share on other sites More sharing options...
Spec B Posted January 10, 2011 Share Posted January 10, 2011 Read this..it has all the basics. http://forums.nasioc.com/forums/showthread.php?t=1626520 Link to comment Share on other sites More sharing options...
dr_sharp Posted January 11, 2011 Author Share Posted January 11, 2011 Awesome thank you! Why isn't that in any of the stickies??? lol Link to comment Share on other sites More sharing options...
m sprank Posted January 11, 2011 Share Posted January 11, 2011 I have a pdf doc that explains it using RomRaider. Too big to post. Link to comment Share on other sites More sharing options...
rtbrjason Posted January 11, 2011 Share Posted January 11, 2011 Here are a couple of other methods. http://forums.nasioc.com/forums/showthread.php?t=1427448 http://www.romraider.com/forum/viewtopic.php?f=33&t=5404 This is the sheet that I use to filter all my driving data and keep track of maf, mrp, knock and af. http://www.romraider.com/forum/viewtopic.php?f=32&t=6313&p=60882 Link to comment Share on other sites More sharing options...
NSFW Posted January 12, 2011 Share Posted January 12, 2011 I think it's simpler to disable closed-loop fueling while scaling a new intake. That's what I'll be doing when my KSTech gets here. Set all the 14.7 cells in your fuel table to 14.6, and set the "minimum active primary open loop enrichment" to 14.65. This disables AF Learning and AF Correction, which makes it much easier to collect AFR data for MAF scaling. The only drawback is that you can't use RomRaider's MAF scaling tab with this trick. You just have to log AFR (preferably from a wideband or a stock O2 sensor that's been relocated to the downpipe) and Final Fueling Base, and MAF. Then you can make a scatter plot with MAF on the X-Axis and "AFR Error" (actual AFR divided by target AFR) on the Y-axis, and that plot will show you where to adjust your MAF scaling. That will get you most of the way there. Just make corrections that are half as much as you think you need to make, to avoid overshooting. It's sometimes also helpful to look at AFR Error over RPM as well. I had a set of fuel injectors that did weird things at certain RPM/Load combinations. Link to comment Share on other sites More sharing options...
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