Practical Reflash Tuning: Step 5-D: Adjusting All Maps Simultaneously
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Step 5-D: Adjusting All Maps Simultaneously
04.17
| 00:00 | - The final technique that we're going to look at in our worked example is how we can make wholesale changes across all of our fuel or ignition tables simultaneously. |
| 00:10 | And we're going to achieve this by using the edit all tables tick box. |
| 00:14 | Now this does need to be used with a little bit of caution and a little bit of understanding around what the results will be. |
| 00:22 | Obviously we are here going to be making changes to every table at the same time. |
| 00:27 | So all six of our cam timing tables will be affected when we make a change, with our edit all tables tick box ticked. |
| 00:35 | This is useful in some instances though. |
| 00:39 | So for example if we have tuned our wide open throttle fuelling to achieve a lambda of let's say 0.90 and we want to try bracketing that air fuel ratio and see if the engine perhaps responds better by being a little bit richer or a little bit leaner. |
| 00:56 | Rather than going through and adjusting each of our individual fuel tables right through the rev range, what we can do is tick the edit all tables button, and then we can make that change to one table it'll be applied to all of them. |
| 01:09 | Let's have a quick look at how we can do that. |
| 01:11 | So we're going to come down and we're going to start obviously by ticking the edit all tables box, now that will be in effect, now all of the tables will be adjusted. |
| 01:22 | So we're on our zero degree fuel table here for our low speed cam. |
| 01:27 | And as we've seen, our wide open throttle operating area, we're going to be functioning in columns eight, nine and 10. |
| 01:34 | So let's say for example we want to try richening our air fuel ratio up 2%. |
| 01:39 | So what we can do here is highlight that entire wide open throttle operating area, control J, and we'll simply add 2% to that region. |
| 01:48 | We'll also obviously need to replicate that change on our high speed cam map so we'll do that as well. |
| 01:55 | Now we can run our engine, our fuelling will be increased by 2%. |
| 01:59 | So instead of 0.90 we're going to be expecting to see somewhere around about 0.88 At the same time we could've easily gone the other way and removed 2%. |
| 02:09 | So it just allows us to see the result of those changes once we've already got our fuelling really nicely dialled in on the individual tables, and it means we don't need to go back and change those individual tables. |
| 02:21 | Obviously a much more time consuming process. |
| 02:23 | So it does rely on us already having a well developed tune. |
| 02:28 | This isn't a bandaid for doing our job properly in the first place. |
| 02:32 | Now another way that I will use the edit all tables function, is if I've got an area where I've got a little bit of knock, perhaps at low RPM and high load. |
| 02:42 | Now of course we could zero in on the exact cam angle where that knock's occurring but to add a little bit of safety around this, quite often I will highlight that area using the edit all tables function, and we'll remove timing from all of the cam angles, remove ignition timing I should say, from all of the cam angles simultaneously. |
| 03:02 | When we're making changes using the edit all tables function, we also need to be a little bit mindful of how we make those or apply those changes. |
| 03:12 | On the fuel tables for example, I'd recommend that you use the percentage change, and this means that regardless of the actual numbers in the specific fuel table, we're gong to be applying the same percentage change to all of them. |
| 03:25 | This will keep a nice smooth transition between all of our fuel tables for the various cam angles. |
| 03:31 | Likewise when we're making changes to the ignition table I'd recommend that you do this by adding or subtracting to the ignition values. |
| 03:38 | This means again we're keeping a nice consistent trend across all of our cam angle tables for our ignition values. |
| 03:46 | So at this point in our worked example, our calibration should be complete. |
| 03:50 | We should have our fuel and our ignition timing dialled in across all of our cam timing tables, we should have our VTEC point optimised, and we should have our cam target tables optimised too. |
| 04:02 | The next step will be to take our car off the dyno, out into the real world, on the racetrack, and gather some data to make sure that everything we see out on the racetrack, matches what we're seeing here on the dyno. |
