[urq] EFI + MAC-14 maxing ataround 5k RPM

Ben Swann benswann at verizon.net
Tue Oct 23 19:27:49 PDT 2007


OK check out the logs I sent you.  If I recall, I was seeing some high percentages on
pulse width.  I just don't understand why with these injectors, unless I'm overfueling
and perhaps with injectors at around 100% any semblance of measured fuel output goea out
the window.

Ben

-----Original Message-----
From: Cody Forbes [mailto:cody at 5000tq.com] 
Sent: Tuesday, October 23, 2007 10:14 PM
To: Ben Swann; quattro at audifans.com
Subject: Re: [urq] EFI + MAC-14 maxing ataround 5k RPM

Ben Swann wrote:
> So if my max pw is 11.9 but if a rev. happens in only 11 ms then the
> injector pw > rev,
> so injector is open 100%.


On the main screen there is a PW gauge and duty cycle gauge. You can watch 
the duty cycle gauge to see if it hits 100%, and you can watch the PW gauge 
to see if it bounces wildly when the engine starts cutting out.

Unless you changed something you are still using my setup with a re-tuned 
map. I rev my car to 8,000rpm no problem both when I had 42lb injectors and 
now on the 75's, so it's unlikely that your issue is there. Verify you are 
on 1 injection per revolution on the 'constants' screen.

How about taking a quick log and sending it to me? All you'd need to do is 
fire it up, let it warm up, and slowly increase revs until the cut-out - 
that should be enough for me to find any evidence if there is any to find. 
Send your settings file too. We'll get this licked if I have to drive my ass 
back out there! I want to visit the Udvar Hazy Air&Space Museum annex 
anyways!

-Cody 



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