Summary

00:00 - Antonio's asked, how would you know when your injectors are maxed out? OK so in most instances we're going to have the ability to simply monitor our injector duty cycle, so that's obviously the quickest way of telling what's going on there.
00:13 Ideally I don't like to run much above about 85% to maybe 90% injector duty cycle at the absolute most.
00:22 Once we get above this we really need larger injectors.
00:25 And if we're consistently running at or above about 95% to 100% injector duty cycle, that means the injectors are wide open and we're going to get no more flow.
00:35 So if our air fuel ratio is starting to move lean under these conditions then that generally means that either our injectors or our fuel pump are too small.
00:43 And it's important to mention that it could be either of these things, that's why it's really valuable to also monitor our fuel pressure because if our fuel pressure is dropping away, that means that the fuel pump can't supply enough fuel to the injectors and we can mask this by increasing our injector duty cycle.
01:01 So really important to have a good understanding of both aspects there, otherwise we can go and fit a larger set of injectors and find that because the fuel pump can't keep up, we're still going to be running lean at high RPM.
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