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Old 10-31-2010, 01:34 PM   #16
NOTORIOUS VR
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It's quite obvious the dyno was done in europe.

You didn't answer the other questions. Why are the plots almost identical but just shifted?

Why is the AFR plot just shifted up to be leaner, but follows the same curve? You just changed the injector constant? maybe, but that dyno/AFR plot is not a good thing to show your tuning skills IMO.

Hell I bet adding fuel @ 4000 would have picked up TQ and flattened it out instead you just left the tables alone and so @ 4000rpm you're running almost 15:1 AFR.

I've also reported your post BTW. If an admin/owner of the site gave you permission then maybe they should make you an official sponsor for a certain time. It's not fair to paying sponsors for you to try and sell you seemingly shoddy work for free.
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Old 10-31-2010, 01:52 PM   #17
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Quote:
Originally Posted by NOTORIOUS VR View Post
It's quite obvious the dyno was done in europe.

You didn't answer the other questions. Why are the plots almost identical but just shifted?

Why is the AFR plot just shifted up to be leaner, but follows the same curve? You just changed the injector constant? maybe, but that dyno/AFR plot is not a good thing to show your tuning skills IMO.

Hell I bet adding fuel @ 4000 would have picked up TQ and flattened it out instead you just left the tables alone and so @ 4000rpm you're running almost 15:1 AFR.

I've also reported your post BTW. If an admin/owner of the site gave you permission then maybe they should make you an official sponsor for a certain time. It's not fair to paying sponsors for you to try and sell you seemingly shoddy work for free.
They are shifted because we made two different runs using slight changes in spark and fuel
Also the dyno plot was from a e36 M42 motronic 1.7.2... most tuners wont even touch this system due to the fact that it doesn't use the traditional 1x16 wot fuel map
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Old 10-31-2010, 02:01 PM   #18
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Originally Posted by bmwconnect View Post
They are shifted because we made two different runs using slight changes in spark and fuel
Also the dyno plot was from a e36 M42 motronic 1.7.2... most tuners wont even touch this system due to the fact that it doesn't use the traditional 1x16 wot fuel map
Lots of DME's don't have 1x16 WOT fuel maps. The 413 DME doesn't, and I develeped a chip for that over 10 years ago.

I'm not sure why you are running the motor so lean at WOT, it should be 13.0:1 or richer at 5K, not 14.8

Last edited by MarkD; 10-31-2010 at 02:04 PM.
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Old 10-31-2010, 02:14 PM   #19
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A good majority of the early motronic use 1x16 ( 1x32 is fun too) but you are correct not all use that structure... I know you have good stuff mark and I'm never negative towards your work and I have no reason to be, but at the end of the day business is business

At least we both make a lot of people happy and I'm good with that!!
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Old 10-31-2010, 02:20 PM   #20
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I'm not sure why you are running the motor so lean at WOT, it should be 13.0:1 or richer at 5K, not 14.8
The afrs readings in that plot are not correct anyway.. just been told to ignore them

Last edited by bmwconnect; 10-31-2010 at 02:24 PM.
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Old 10-31-2010, 02:54 PM   #21
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The afrs readings in that plot are not correct anyway.. just been told to ignore them
They might not be 100% correct (post cat sniffer?), but the TQ clearly follows the AFR's and it's quite obvious that it's too lean in certain spots.
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Old 10-31-2010, 03:05 PM   #22
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AFR was measured with lambda probe at the end of the muffler with cat installed, so AFR is indeed not correct
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Old 11-01-2010, 01:58 PM   #23
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The afrs readings in that plot are not correct anyway.. just been told to ignore them
So then,on what base did you make the adjustments? Just by reading the RPM??
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Old 11-01-2010, 02:06 PM   #24
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AFR was measured with lambda probe at the end of the muffler with cat installed, so AFR is indeed not correct
Even if they sniffed AFR at the exhaust, it still appears too lean to account for just that.
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Old 11-01-2010, 02:17 PM   #25
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It is too lean... a cat will change the readings slightly.. but even then you still have the TQ to go off of. The TQ dip is directly in relation to being too lean.
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Old 11-01-2010, 02:22 PM   #26
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clearly the probe was not calibrated or working incorrectly otherwise the power would not be there
here is my final edit for WOT
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Old 11-01-2010, 03:05 PM   #27
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clearly the probe was not calibrated or working incorrectly otherwise the power would not be there
here is my final edit for WOT
so if the probe was not working correctly, why should we assume that the dyno IS working correctly?
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Old 11-01-2010, 03:08 PM   #28
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How can one assume any dyno is working correctly? there is like 10 major manufactures and they will all give various results
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Old 11-01-2010, 03:13 PM   #29
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1x16 is for SPARK and is ofcourse used in this ecu
1X16 WOT fuel map is not used in motronic 1.7.2
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Old 11-01-2010, 03:15 PM   #30
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1x16 is for SPARK and is ofcourse used in this ecu
1X16 WOT fuel map is not used in motronic 1.7.2
I just erased my post and then saw your answer. I'm busy here with something else and just dropped in and read it quickly. A bit too quickly.
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