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Practical Standalone Tuning: Step 5: Initial Startup

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Step 5: Initial Startup

04.29

00:00 - We're finally at a point where we can start our engine up for the very first time.
00:05 And at this point we've got our base table set up.
00:08 Because we've used the VE generator function, we should be in a position where the numbers in that table will allow the engine to start up and run.
00:16 However regardless of this, we're going to show you that it is incredibly easy to make coarse adjustments at this point in order to get the engine running quickly and show that we don't have to have the absolute perfect numbers in this table.
00:29 At this point we're only going to be concentrating on our fuel delivery.
00:33 You'll remember that we have set our ignition table at the moment to an across the board 15 degrees, we've gone through and we've adjusted our base ignition timing so we've got that correct, so we can for the moment completely forget abour our ignition timing and just focus solely on our fuelling.
00:51 Now I'll just show you the page that I am working on here which shows me the information that I need.
00:58 So we are at the moment on our dyno, tuning and dyno views page.
01:02 So the relevant information at the moment we've got here, we've got our lambda or air/fuel ratio being displayed.
01:09 We have our VE table being displayed out to the right both graphically and numerically, we've got our graphical representation of course down below.
01:20 The other aspects that we will want to keep an eye on, we've got our coolant temperature and our manifold air temperature being displayed on this page.
01:29 And we can see if there are any corrections being added.
01:34 So right now, we can start by highlighting the area of this table that we're expecting to be running in.
01:42 For the moment I'm just going to be quite coarse with this, I'm going to highlight from 100 kPa all the way down to 15 kPa and 600 down to 1800 RPM.
01:50 There are a variety of ways we can make adjustments to the numbers in this table.
01:56 What I'm going to be doing is using the comma and full stop keys on the keyboard.
02:01 So if we use the comma key, we can see that we remove 0.1% fuel.
02:06 The full stop key, we're going to add 0.1%.
02:10 Now that's a fairly fine adjustment, we're going to definitely want to be making larger adjustments if our fuelling is off.
02:15 So if we hold down the control key you can see that as we use the up key, we're adding half a percent and as we use the down key or comma key, we're removing half a percent.
02:27 So that's all we're going to do at the moment, we're just going to have that block of cells highlighted, we're going to make coarse adjustments, watching our lambda and making sure that that's going to settle in around about our target.
02:38 Remembering of course that the engine is cold and will be warming up.
02:41 So we can just monitor this as we go.
02:44 Now at this point as well, because our idle settings haven't been adjusted, we're likely to find that the engine isn't going to want to idle on its own so we may actually need to use a little bit of throttle manually to keep the engine operating, we want to keep it perhaps in the 1000 to 1200 RPM vicinity.
03:00 So let's crank our engine and we'll see if we can get it to start.
03:06 So straight away we can see that our engine starts up really quickly and easily, I'm just using a little bit of throttle here and we can see that straight away our lambda's actually sitting pretty close to our target.
03:17 Remembering that our target at idle was around about 0.95 lambda.
03:21 So as we warm up we can see we are moving a little bit lean here, nothing too crazy but we'll just hold down the control key and we'll use the up key to just add a little bit of fuel to our table, add to our VE table and that will have the effect of increasing our fuelling.
03:38 You can see that that's exactly what's happened.
03:40 We're sitting at around about 0.97 lambda so nothing to worry about there.
03:44 At the same time we can see that our idle speed is sitting at about 1300, I'm just using a very small amount of throttle to control that.
03:53 And as we can see, our coolant temperature is sitting at 29 degrees at the moment.
03:58 30 degrees, just starting to warm up so we can monitor this as our engine comes up to temperature.
04:05 Again, not trying to make fine changes to the numbers in this table.
04:08 We're simply going to be making coarse adjustments to that entire block of cells, making sure that we keep on top of our air/fuel ratio as the engine warms up.