mastacox
03-25-2008, 04:12 PM
http://www.innovatemotorsports.com/xcart/product_image.php?imageid=179
So Innovate Motorports, the guys who make my wideband oxygen Sensor setup, have finally come out with their OBD-II scanner that can be intergrated with their other products! The OT-1 (http://www.innovatemotorsports.com/resources/OpenTune.pdf) can read any OBD-II information going through your computer, and measure them at about 12 samples per second.
Why is this cool? Well, those of you with a supercharger and URD kit know that tuning can be a bit of a black art, espacially when it comes to fuel trims in the ECU (which we have no control over) versus trims in your piggyback control unit. Tuning your values usually involves setting some arbitrary numbers to start with, driving around, and watching your computer screen with both the OBD reader interface open and the tuning software open. Based on what you remember seeing, you try to adjust your map up of down depending. Refresh rate is about once a second, so it's a fairly inexact science, takes some serious patience, and a second person. The "adjustment map" if you will, is in your head.
But, with this device you can actually log a spreadsheet of data- RPM vs. MAP vs. OBD-II Fuel Trim. This graph, once measured, would essentially be a percentage map of how much your fuel trim map needs to be adjusted. My plan is to do exactly this using the OT-1; for closed loop tuning I'll start start logging data and come up with a map that tells me how much I need to adjust my map up or down, and where exactly that adjustment has to take place. This will handle closed-loop tuning (which is a PITA), and then for open-loop tuning I'll just log RPM vs. MAP vs. AFR (because I already have a wideband oxygen sensor system). This way, ALL of my tuning will be based on data acquisition and exact numeric adjustment, rather than the touch-feely adjustments I have to do right now.
Additionally, my wideband system diplays on an XD-16 display, which can be programmed to display any data in the system. So once I get the OT-1 and another digitzer to handle MAP and , I'll be able to display any OBD-II metric through the gauge. Eventually, I'm going to replace my boost gauge with a second XD-16 (ironically, a boost gauge is one of the least useful gauges taking up space in my cabin right now), and then I will be able to display any measurments I have digitized in the system; for example, AFR, EGT, RPM, MAP, MPG, etc. :smokin:
So Innovate Motorports, the guys who make my wideband oxygen Sensor setup, have finally come out with their OBD-II scanner that can be intergrated with their other products! The OT-1 (http://www.innovatemotorsports.com/resources/OpenTune.pdf) can read any OBD-II information going through your computer, and measure them at about 12 samples per second.
Why is this cool? Well, those of you with a supercharger and URD kit know that tuning can be a bit of a black art, espacially when it comes to fuel trims in the ECU (which we have no control over) versus trims in your piggyback control unit. Tuning your values usually involves setting some arbitrary numbers to start with, driving around, and watching your computer screen with both the OBD reader interface open and the tuning software open. Based on what you remember seeing, you try to adjust your map up of down depending. Refresh rate is about once a second, so it's a fairly inexact science, takes some serious patience, and a second person. The "adjustment map" if you will, is in your head.
But, with this device you can actually log a spreadsheet of data- RPM vs. MAP vs. OBD-II Fuel Trim. This graph, once measured, would essentially be a percentage map of how much your fuel trim map needs to be adjusted. My plan is to do exactly this using the OT-1; for closed loop tuning I'll start start logging data and come up with a map that tells me how much I need to adjust my map up or down, and where exactly that adjustment has to take place. This will handle closed-loop tuning (which is a PITA), and then for open-loop tuning I'll just log RPM vs. MAP vs. AFR (because I already have a wideband oxygen sensor system). This way, ALL of my tuning will be based on data acquisition and exact numeric adjustment, rather than the touch-feely adjustments I have to do right now.
Additionally, my wideband system diplays on an XD-16 display, which can be programmed to display any data in the system. So once I get the OT-1 and another digitzer to handle MAP and , I'll be able to display any OBD-II metric through the gauge. Eventually, I'm going to replace my boost gauge with a second XD-16 (ironically, a boost gauge is one of the least useful gauges taking up space in my cabin right now), and then I will be able to display any measurments I have digitized in the system; for example, AFR, EGT, RPM, MAP, MPG, etc. :smokin: