Practical Standalone Tuning: Step 10 : Confirming the Tune on the Road/Track ( Touchscreen )

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Step 10 : Confirming the Tune on the Road/Track ( Touchscreen )

09.22

00:00	Alright, we're back out on the road with our touchscreen this time and the process is going to be pretty similar but of course this time we really don't have the ability to make any adjustments using the touchscreen to our specific fuelling or ignition points.
00:13	So, it's really going to be a case of repeating what we did on the dyno but now of course we are under real world conditions.
00:19	Specifically what I'm going to do here is use the monitor screen that we can see at the moment where we've got everything related to our air fuel ratio being displayed.
00:28	We can see at the moment we're sitting at idle and we're sitting right on our target air fuel ratio, our closed loop compensation is sitting around about zero, maybe around a little bit and our current learn value is sitting at minus 10.
00:40	We are in closed loop and we are also learning.
00:43	So, the process here is going to be just to drive the car under our normal cruise conditions, using as much of the cruise area of the map as we can and I'm going to be varying the throttle position, the RPM and the load using a little bit of left foot braking.
00:56	Reality is here because it is self learning, it would be a case of just simply driving the car for maybe a couple of hundred miles just to get everything dialled in and really we know that it's going to be dialled in just like it was on the dyno when our closed loop comp's sitting close to zero and everything has been then transferred to the learn table.
01:15	So, as part of this, just like with the laptop, I'm going to be focusing on any drivability concerns so any areas that the engine isn't running smoothly, we'll also be checking some of the tip in performance as well, making sure that the car's accelerating smoothly.
01:29	Now, while I am focusing here on fuelling and I did so also with the laptop software, it goes without saying that we would be also checking for any knock or detonation occurring with our audio knock gear as part of this as well to be complete in terms of checking out the quality of our tune.
01:47	So, let's get out on the road, we'll go for a drive and what we're looking for again is just those closed loop compensation values, making sure that they are sitting nice and close to zero.
01:56	So, on a gear change there we saw our closed loop jump up to I think it was about positive four value but for the most part we're seeing nothing more than 1% or 2 % trim so everything's looking really really good here.
02:08	You can see at the moment, minus 2% on our closed loop and we were about minus 14% at that point on our learn value but everything does always move around depending on exactly which cell we're accessing at the time.
02:20	But this is the process we're going to go through here, just basically varying our throttle position, our RPM and allowing the self learning to do its thing.
02:29	So, let's keep going and see what our results look like.
03:33	Alright, let's pull over and we'll talk about what we've seen there.
03:36	OK so for the most part everything I saw while we were doing that little drive stacked up pretty well, most of the areas were within plus or minus 2% to 3%, we did see a few outliers there with I think 5% or 6% was about the most I saw.
03:50	Now, some of this can come down to the variations that we see from what happened on the dyno to what we actually see in the real world which is why we complete this step.
04:00	The process here of course with that touchscreen, there's nothing we can really do to speed up that process or manually make these changes so it really is a case of just getting in some miles on the vehicle and allowing that self tune to transfer all of those closed loop values across into the learn table.
04:18	Since it's just a case of repeating what you've seen here, I'm not going to do any more of this, I'm really happy with how the car's driving, it's nice and smooth, it responds nicely to throttle tip in so everything's checking out really nicely.
04:30	We do have the wide open throttle acceleration run to go though so we're going to do that next.
04:36	Now, it is worth mentioning here that we can datalog onto the SD card using the LCD touchscreen and the reason I'm not using that for the road tuning part of this particular worked example or this particular step is that I don't believe that anyone using this touchscreen is then going to use a laptop to analyse their datalogs because otherwise, most likely you would also do your tuning with the laptop.
05:02	So, I don't think that's a reasonable case study, however if you do want to do that, of course using the datalog is no different to what we saw in the previous step using the laptop software, we can just load our datalogs up in exactly the same way and analyse them.
05:17	What we're going to do with that information though does get a little tricky without also using the laptop to make the tuning changes so that's why I'm not covering that.
05:25	Let's get back out on the road and we'll do our full power acceleration run and again we're going to be monitoring our short term or closed loop trims and our learn values while we're doing that.
05:35	Alright, we're back up and running, we're ready to do our full power acceleration run.
05:39	Now, generally we're going to be watching our closed loop trims here so it's generally advised that you have a friend or helper watch these so you can concentrate on the road.
05:48	Alright, let's get our run underway.
06:06	Alright, so everything was looking pretty good there, our closed loop trims were generally pretty close to zero, a few areas where they aren't but again just like with our cruise tuning, this is just going to take several more attempts to iron those out, transfer all of those closed loop values across into the learn table.
06:25	Let's head back to the workshop and we'll finish up this particular step.
06:29	Alright, we're back at the workshop and the reality of this is that I would recommend that you just drive the vehicle for a good few hundred miles just to basically let that self tune complete as much of the table as it can and transfer all of those closed loop numbers across into the learn table but I also wouldn't suggest leaving things like this because as we already know, we've got a huge amount of control authority in both the closed loop as well as the learn table and once we've got the fueling pretty close to the mark, pretty well dialled in, we really don't want to give the system that much authority or it could create some problems for us so let's see how we can do this.
07:08	So, what we're going to do is jump into our tuning and we're going to go into advanced and we're going to go into our closed loop for a start.
07:17	So, here we can see our closed loop limit is currently at 100% and let's cancel that, we could enter it numerically or we can use our little slider here so I might like to bring this down to maybe somewhere in the region of 20-30%, that's probably going to be more than sufficient if everything else is dialled in quite nicely so we'll save that and we'll go back.
07:41	Now, we'll come into our advanced learn function and again we've got a huge amount of authority here, 100% and just in the same way, once we've got everything dialled in, I'd probably like to bring this down to, let's see, around about 20 -30 % as well.
07:59	So, we're still giving it a lot of control there but just removing the ability to go plus or minus essentially 200%.
08:05	Again, the actual numbers that you settle on are going to be personal preference.
08:09	Unlike the laptop where we can choose the authority available at idle versus cruise versus wide open throttle, we can't do that here so 30%, possibly a little bit more than we need to give it, again personal preference.
08:22	Alright, we're going to go back here and we're going to go to our transfer table.
08:26	So, I only recommend we do this once everything's really pretty dialled in, we've got a lot of learning done and this is going to ask us if we want to smooth the fuel table with the learned values and this is essentially going to transfer our learned values through into the fuel table, so basically zero everything out and with this done, it should bring our closed loop trim back to where we've just seen it, close to zero but it should also bring our learned values back down to zero.
08:53	Obviously, we can do this multiple times but again I would recommend doing this after you've got a few hundred miles on the vehicle and you're comfortable that everything is operating nicely and we're seeing those closed loop numbers that consistently are very close to zero.
09:08	So, that concludes our Holley Sniper 2 worked example and if you do have further questions on anything as part of this example, please ask those in the forum and I'll be happy to answer them there.