Results from preliminary testing of stage 3- with MBC only.....
06-18-2005, 10:39 PM
#1
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Results from preliminary testing of stage 3- with MBC only.....
~17.5 PSI spike with slight taper to redline:
<img src="http://img.photobucket.com/albums/v654/DocSlow/Stage3-withMBConly55F4pt45FATS.gif" alt="Image hosted by Photobucket.com">
Both primary sensors were reading the exact same voltage so you can only see 1 line:
<img src="http://img.photobucket.com/albums/v654/DocSlow/02voltageforStage3-withMBCOnly55F4pt45FATS.gif" alt="Image hosted by Photobucket.com">
Coming soon-->testing with more boost and/or less fuel pulled back.
<img src="http://img.photobucket.com/albums/v654/DocSlow/Stage3-withMBConly55F4pt45FATS.gif" alt="Image hosted by Photobucket.com">
Both primary sensors were reading the exact same voltage so you can only see 1 line:
<img src="http://img.photobucket.com/albums/v654/DocSlow/02voltageforStage3-withMBCOnly55F4pt45FATS.gif" alt="Image hosted by Photobucket.com">
Coming soon-->testing with more boost and/or less fuel pulled back.
06-19-2005, 12:12 AM
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Nice timing, Whats with the g/s dropoff? How about an X axis on the O2 graph with RPM ;)
<center><img src="http://pictureposter.audiworld.com/38083/preliminarydata.jpg"></center><p>Interesting MAF dropoff at 6300ish. That shouldn't be with MBC only... g/s should increase at a slower rate or level out with RPM to redline with a slight (.5#?) taper from 17.5#.
My K16 had a pretty pronounced taper from 24-21.5# at redline and my g/s always increased to 6600 where they tapered off a bit when they ran out of breath. At your # you shouldn't even be close to this. Turbine inlet pressure fairy giving you a visit?
Speaking of which: You should log to the throttle cut every time, there's no danger in it... the damned car cuts the throttle off just like you do with your foot
This will give you some more useful data once you turn up the wick.
My K16 had a pretty pronounced taper from 24-21.5# at redline and my g/s always increased to 6600 where they tapered off a bit when they ran out of breath. At your # you shouldn't even be close to this. Turbine inlet pressure fairy giving you a visit?
Speaking of which: You should log to the throttle cut every time, there's no danger in it... the damned car cuts the throttle off just like you do with your foot
This will give you some more useful data once you turn up the wick.
06-19-2005, 07:19 AM
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When I said slight, I meant less taper than before. It still tapers enough for g/s to drop off.
As for RPM on 02 voltage log, pretty much the same as the RPM on the 003 graph as they were taken at the same time.
Not sure what you're talking about here:
"Speaking of which: You should log to the throttle cut every time, there's no danger in it... the damned car cuts the throttle off just like you do with your foot This will give you some more useful data once you turn up the wick."
If you mean take it to redline for more data, I did this but stupid VAG-Com has horrible sample rate when logging 2 blocks. I'll get some solo 003 logs soon.
Not sure what you're talking about here:
"Speaking of which: You should log to the throttle cut every time, there's no danger in it... the damned car cuts the throttle off just like you do with your foot
This will give you some more useful data once you turn up the wick."If you mean take it to redline for more data, I did this but stupid VAG-Com has horrible sample rate when logging 2 blocks. I'll get some solo 003 logs soon.
06-19-2005, 07:20 AM
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Didn't log EGTs, not the least bit worried about needing more gas...
It's different for you guys on 91 craptane that need to keep things cool to reduce detonation. Either way, I will play around with adding fuel at some point.
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06-19-2005, 08:08 AM
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Nice data... have you logged injector duty cycles at all?
Even with fuel 'pulled' I wonder if the injectors are still maxing out up top (since the X chip can run so far above 100% duty cycle as a theoretical number, it might still be close to or above 100% with fuel pulled). So when you "add" fuel back in later, you won't actually be adding any fuel (at least up top). Just something to check!
06-19-2005, 08:49 AM
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I definitely see a difference in WOT 02 voltages between -8% fuel and default settings.
Without any fuel pulled back, I run .88-.89+ 02 voltages.
No, I have not logged injector duty cycle.
No, I have not logged injector duty cycle.