Need AFR help with LC-1 and BEGI FMU - Miata Turbo Forum - Boost cars, acquire cats.

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Old 06-01-2007, 06:22 PM   #1
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Default Need AFR help with LC-1 and BEGI FMU

I am going to the dragstrip in a few hours with a bunch of other faster cars that I still need to try and beat. I have been running so rich lately that I pop when I shift, so I backed out the adjuster on the FMU a few times and did logs. I really want you guys to look at my afrs but how do I post the .log files?
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Old 06-01-2007, 06:56 PM   #2
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popping when you shift is because you are running an AFM and a BOV that dumps to atmo. It's because you dump out a lot of metered air so you're a bit rich while decelerating.

It doesn't mean that you're running too rich while in boost.

Take a screenshot of the run, save it as a png or bmp and upload it to a hosting site like imageshack. then use the insert image button on here.
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Old 06-01-2007, 07:07 PM   #3
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Name:  afrlog.jpg
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Size:  39.0 KB
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Old 06-01-2007, 07:12 PM   #4
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zoom in and show just one run per image

you may need to upload multiple images
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Old 06-01-2007, 07:23 PM   #5
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Old 06-01-2007, 07:33 PM   #6
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keep the laptop ready to record...get in third gear...hit 2500rpms...hit record...floor it...stop recording.
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Old 06-01-2007, 07:39 PM   #7
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yeah those aren't full gear pulls. but it looks like you're 11.75:1 going to 12.0:1.

I'd like to see a whole pull...
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Old 06-01-2007, 07:43 PM   #8
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Quote:
Originally Posted by Braineack View Post
keep the laptop ready to record...get in third gear...hit 2500rpms...hit record...floor it...stop recording.
I knew I should have done that.

Wish me luck tonight anyways. Although I am more excited about the ferrari 360 race! I won't be redlining in third, anyways, cause its just the eighth.
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Old 06-05-2007, 05:44 PM   #9
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Drag racing went well. Raced a friend of a friend who said his 97 eclipse could run 8s, it can't. Also smoked a magnum truck and a beefed up montecarlo. Even though my eighth was only 9.8, it was pretty fast for the track/weather. The only cars faster were the seriously modded awds and v8s with slicks. 10psi will be ready for the next one, hopefully. I am curious to see the absolute max limit of the stock clutch. I'll turn the boost back down until I buy the ACT. Thanks for looking at my AFRs, heres the 3rd gear run today...

Name:  3rdgear.jpg
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Old 06-07-2007, 07:43 PM   #10
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Am I about right or should I tweak this at all?
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Old 06-07-2007, 08:02 PM   #11
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Lean it out abit past 6K rpm and you should pick up a little power try for 12.4-1 past there.
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Old 06-07-2007, 08:41 PM   #12
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Thanks man! I will shoot for that when we go 10psi, also.
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Old 06-07-2007, 10:59 PM   #13
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there is no way to lean it out after a certain rpm. the ecu goes nuts at 5500 rpm, and injector duty cycle shoots towards 90%. it's going to be rich up top. you'll still make power. when/if you go standalone, you can get your flat a/f curve.
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