Aeroforce Pro Gauge not data logging Injector duty cycle - SRT Forums

tfoster405 · 01-02-2007, 07:00 AM

I ordered and installed a pro version about 3 weeks ago. Everything seems to be OK with the gauge.

I have logged most variables using the aeroforce pro gauge.

For some reason, when I try to log injector duty cycle and play it back, bad data is shown on the gauge. I know that it is bad since I just got done doing a 3rd gear blast and I watched realtime the duty cycle increase up to over 100.

Lastly, what is the meaning of injector duty cycle going over 100? I thought the value for injector duty cycle is in percent. How can it be over 100%?

thanks,

Tim

forcefedjunkie · 01-03-2007, 07:03 PM

Hmmm, have to look into the record issue.

We could cap the actual value at 100%, but decided to let it keep rising just to indicate how "badly" the injectors are undersized.

Todd

tfoster405 · 01-04-2007, 05:38 AM

thanks for the reply.

As for the injector duty cycle going over 100, that's no big deal, I actually think like you, that it is good to see how badly the injectors are being overworked.

But, the real question is what exactly is the meaning of injector duty cycle?

Secondly, Please try to log injector duty cycle on a new gauge and see if you have the same problem that I am having.

Thanks,

Tim

turbonewb · 01-04-2007, 06:57 AM

I have the same issue. My injector duty cycle reading goes over 100% eventhough I have 650cc injectors from Deatsch and RRFPR set at 43.5 psi.

tfoster405 · 01-04-2007, 07:41 AM

turbonewb,

Have you tried to data log injector duty cycle yet?

turbonewb · 01-04-2007, 08:18 AM

Quote: Originally Posted by tfoster405

turbonewb,

Have you tried to data log injector duty cycle yet?

Not yet but I was looking at injector duty cycle during 3rd gear pull.

forcefedjunkie · 01-04-2007, 02:45 PM

Quote: Originally Posted by turbonewb

I have the same issue. My injector duty cycle reading goes over 100% eventhough I have 650cc injectors from Deatsch and RRFPR set at 43.5 psi.

Don't you have something like a SAFC to control those injectors? If the PCM is not in full control then ingore this number. The gauge displays what the PCM is broadcasting, anything that happens afterwards cannot be displayed.

Todd

turbonewb · 01-05-2007, 01:27 PM

Quote: Originally Posted by forcefedjunkie

Quote: Originally Posted by turbonewb

I have the same issue. My injector duty cycle reading goes over 100% eventhough I have 650cc injectors from Deatsch and RRFPR set at 43.5 psi.

Don't you have something like a SAFC to control those injectors? If the PCM is not in full control then ingore this number. The gauge displays what the PCM is broadcasting, anything that happens afterwards cannot be displayed.

Todd

Thank you for your information. Yes I actually use SAFC II to control fuel.

cali · 04-03-2007, 12:18 PM

BUMP!
Todd, I have the same issue. I was trying to log RPM and DC. I watched in realtime my injectors hit 90%. When I play back the log, its usually 0 for the DC with a few bursts of 1-5. The RPM is there....at 5K rpm 0 dc...

I have s3r, and my PCM is in full control.

Scan rate is 1

iridefast · 04-16-2007, 02:58 PM

I am a bit confused. I also watched my duty cycle. It went well over 100% as soon as I hit full boost before 4k. I am using rc750's with a static pressure of 50psi, on 22psi of boost (big turbo). It is not enough pressure, I know, but I have plenty of fuel at that RPM. Enough to be in the 9's afr. I am using a safc II as well, but I thought that fooled the pcm by showing less air, and the pcm still controlled the injectors. Which if this is the case, then the IDC should be accurate. Also........Can the pro gauge datalog without any additional software? If so, I had no idea.

forcefedjunkie · 04-16-2007, 04:01 PM

Quote: Originally Posted by iridefast

I am a bit confused. I also watched my duty cycle. It went well over 100% as soon as I hit full boost before 4k. I am using rc750's with a static pressure of 50psi, on 22psi of boost (big turbo). It is not enough pressure, I know, but I have plenty of fuel at that RPM. Enough to be in the 9's afr. I am using a safc II as well, but I thought that fooled the pcm by showing less air, and the pcm still controlled the injectors. Which if this is the case, then the IDC should be accurate. Also........Can the pro gauge datalog without any additional software? If so, I had no idea.

Can't answer your tuning question but yes, the gauge will log if you go to the menu and choose "record". You'll go back to the normal san screen except you'll notice 2 squares in the top left of each data field. Once throttle exceeds 50% the displays colors will invert and you will record whatever is being displayed for about 1 min. The screen will invert once again when complete. Go back to the menu and select "play" to replay what you recorded. Push the right button to go forward, the left to go back. Press and hold either to quickly scroll through all of the data.

Todd

iridefast · 04-16-2007, 07:02 PM

Hey, thx Todd. I had already figured out how to do it early after reading this post. What I did not know was what the parameter were to start it, and how long it recorded. Thx for the info. I love this gauge more and more every day.

iridefast · 04-16-2007, 08:17 PM

Sorry guys, back on topic. I went out and did the data log on the rpm and IDC. Mine worked just fine. Recorded all as it should have. Hope this helps

evo77 · 04-17-2007, 11:28 AM

Quote: Originally Posted by iridefast

Sorry guys, back on topic. I went out and did the data log on the rpm and IDC. Mine worked just fine. Recorded all as it should have. Hope this helps

So was your DC still showing 100%?

iridefast · 04-17-2007, 08:53 PM

Quote: Originally Posted by evo77

So was your DC still showing 100%?

Yeh, It looked good until 4k rpm's then climbed from 89% to 116% by 5.6k. I made that run with the rc 750's at 55psi, and at 5.6k I hit a 11.98 AFR. Higher than I wanted, but not terrible. I added another 2 psi of fuel, I will see how this treats her. Its hard to believe they are working that hard. Without using the SAFC to pull a ton of fuel, those injectors actually drown my engine in fuel, imm talking in AFR's below 9.0