Injector duty-what should I see?
05 May 2008, 05:01 PM
#1
Injector duty-what should I see?
Decided to set the AVC-R to show injector duty and at the same time switched to setting B which limits boost to 1.3 bar. After a drive I had a look at the maximum values and the injector duty showed 100%! Max. boost used was only 1.1bar There was no way the injectors (650cc) could be maxing out? How do I interpret this reading?
JohnD
JohnD
05 May 2008, 08:40 PM
#3
MD321H, Hyperflow induction, ported headers, Full Miltek 3"system with cat. all installed and mapped by ZEN.
It's the first time I've used the injector duty readout and the low boost setting. The duty at idle was 49% and didn't seem to change as I blipped the throttle and I admit that I didn't keep an eye on it as I drove. My PSi3 was showing perfect air/fuel at 14.7 (lambda 1) off boost. I'll check the injector duration on the PSi3 tomorrow.
I believe the duty can be calculated from the revs and duration?
JohnD
It's the first time I've used the injector duty readout and the low boost setting. The duty at idle was 49% and didn't seem to change as I blipped the throttle and I admit that I didn't keep an eye on it as I drove. My PSi3 was showing perfect air/fuel at 14.7 (lambda 1) off boost. I'll check the injector duration on the PSi3 tomorrow.
I believe the duty can be calculated from the revs and duration?
JohnD
06 May 2008, 09:23 AM
#4
Checked the injector duration on the PSi3 and at idle it's 1.78ms Increases as the throttle is opened (enrichment) and settles at 1.78ms again at 3,000rpm with no load. According to my calculations (for 3k) this equates to a mere 4.45% injector duty! The AVC-R is obviously wrong or maybe it's not actually wired for this readout and the figures I'm seeing are default or base figures? Maybe need to check with Paul at Zen.
JohnD
JohnD
06 May 2008, 10:23 AM
#6
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I suspect your AVCR is wired up to the RPM signal rather than the Injector duty signal. - It's an option you have when wiring in, and setting up the boost controller.
If you have used the RPM signal, it allows you to set the AVCR for RPM based boost levels.
Hence the reason why Inj. Duty is showing spurious values on the boost controller, as it is probably not being used.
Have a look at the AVCR manual - All will be revealed
If you have used the RPM signal, it allows you to set the AVCR for RPM based boost levels.
Hence the reason why Inj. Duty is showing spurious values on the boost controller, as it is probably not being used.
Have a look at the AVCR manual - All will be revealed
Last edited by FB Tuning; 06 May 2008 at 10:42 AM.
06 May 2008, 11:01 AM
#7
I suspect your AVCR is wired up to the RPM signal rather than the Injector duty signal. - It's an option you have when wiring in, and setting up the boost controller.
If you have used the RPM signal, it allows you to set the AVCR for RPM based boost levels.
Hence the reason why Inj. Duty is showing spurious values on the boost controller, as it is probably not being used.
Have a look at the AVCR manual - All will be revealed
If you have used the RPM signal, it allows you to set the AVCR for RPM based boost levels.
Hence the reason why Inj. Duty is showing spurious values on the boost controller, as it is probably not being used.
Have a look at the AVCR manual - All will be revealed
I saw a comment in the manual regarding the "purple" wire and thought there was some correlation to what I was seeing!
JohnD
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