Summary

Dimitri has asked, what's the best way to tune throttle response. OK so throttle response really requires us to get our transient or acceleration enrichment tuning spot on. And this is an area that a lot of tuners really struggle with. It's not actually that difficult if we understand what we're doing here. 

00:00 - Dimitri has asked, what's the best way to tune throttle response.
00:03 OK so throttle response really requires us to get our transient or acceleration enrichment tuning spot on.
00:11 And this is an area that a lot of tuners really struggle with.
00:14 It's not actually that difficult if we understand what we're doing here.
00:18 First of all, getting our throttle or acceleration enrichment tuning correct, relies on starting out with a properly tuned fuel table.
00:26 The acceleration enrichment tables in the majority of ECUs, work as modifiers or multipliers on top of the numbers in our main fuel table.
00:34 So if the numbers in our main fuel table aren't right for a start, there's not way we're gonna get good acceleration response.
00:41 So that's our first job.
00:42 Once we go through there, what we're going to do is find that when we move our throttle very quickly, we'll have some tables that allow us to add additional fuel.
00:50 And what we generally find is that as our engine RPM increases and also as our load increases, in both situations we need a little bit less transient enrichment as we go through.
01:02 So there will generally be a few tables that we can adjust in order to get that working how we need.
01:07 And then what we're doing is adjusting those until we get really crisp response from the engine.
01:13 Now we can look at the air fuel ratio plot, the logging of our air fuel ratio to help with this.
01:19 And this can actually be a little bit misguiding.
01:21 While I do use the air fuel ratio data to help tune my transient enrichment, I'm much more interested in focusing on how the engine actually feels, that's the much more important job.
01:32 So it's quite common that we'll see that once the engine has been tuned correctly and it's operating really nicely the throttle response is really crisp, we'll probably still see a slight lean spike followed potentially by a bit of a rich spike when we do use, add a really sharp amount of throttle input.
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