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Old 09-22-2013, 07:30 AM   #1
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Default New engine is installed, time to start tuning. Please review my AFR targets

My full forged engine is built and installed. I fired it up, and now have it idling good. It's time to take it out and start tuning it. Per recommendations in my previous thread, the wastegate is wired open, and I will be tuning it line by line. Here are the AFR targets that I plan on using:



I adjusted the required fuel based on installing the 725cc ID injectors to be 5.3 based on what it calculated with me using 12.7 as a target AFR (wanted to start off pretty rich). Here are the settings:



Please let me know if I should make any changes to the targets that I am using.

Thanks,

Jason
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New engine is installed, time to start tuning.  Please review my AFR targets-db63a73f-3c7a-4ed1-b4e9-43e6b3c23f92-19181-000005c8da777b64_zps16d5ee69.jpg   New engine is installed, time to start tuning.  Please review my AFR targets-4cd60013-d3bd-423c-a3e3-238a34e6c50d-19181-000005c8e73bf61f_zpsd4eed240.jpg  
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Old 09-23-2013, 02:29 AM   #2
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is this ms3? I'm going to assume that it is.

step1 - plug in the correct req fuel. make sure its 100% accurate and never touch it again. don't use any silly theory that you have to "start rich" or anything. plug in the number and be done.
step2 - enable "include afr" in the general window since your fuel map is still untuned. make sure your timing table below 100kpa is finalized of course. this is a really cool feature in all the ms2+ units that you will learn to love later.
step3 - do 14.7 target accross the board below about 70kpa..like 14 above, and like 13.5 at 90-100kpa. get the fuel map autotuned to a really really solid and consistent and smooth condition. this will take time and you hand-correcting things and smoothing them over.
step4 - after the car is hitting targets like a boss, then adjust targets back to how you have em now or (in my opinion) something a bit better. There's no need to be targeting 12afr at 100kpa, that's just throwing away fuel. If you're on open wastegate it shouldn't go into boost so no need to be overly conservative and run it pig rich.

also I'd spend more time on your timing map and all the trims/enrichments than spending a ton of time focusing on afr target map. just my .02
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Old 09-23-2013, 07:52 AM   #3
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I'd leave your fueling where it is mostly except change your 101kpa line to 12.7 instead of 12.0 all the way across.

The cruise cells are good for fuel economy as they are.

The 230kpa line is probably just fine but I like to see it closer to 11.2 myself, but I'm probably talking overkill.
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Old 09-23-2013, 08:23 AM   #4
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18, I'm running mspnp v1, so those features are not available to me.

Six, thanks for the feedback.

Jason
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Old 09-23-2013, 12:16 PM   #5
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you have a 94+?
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Old 09-23-2013, 09:56 PM   #6
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Yes, 96 car with 99 engine.

Jason
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Old 09-25-2013, 12:30 PM   #7
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As 18psi said
Set up the required fuel for 14.7 if you're using pump gas (regardless of which ms unit you're using) and don't modify this again unless you change fuel or injector size
So...1839 for engine size (be sure to set for CC's and not CID), 725cc/min injectors, 4 injectors, and 14.7 for the stoichmetric air/fuel ratio.
Most of the sub 100kpa bins look good for fuel economy, although I would tune them to ~14.2 first to allow the car to be easier to drive through throttle transitions without too much acceleration enrichment.
Now for 100kpa and up MTB tends to be (according to Greg Banish) between 12.2-12.8 AfR so if you want to err on the rich side 12.2 is where I'd start and pull back from there, but most people have good luck as lean as 13.1 at 100kpa with good tuning but work there from the rich side first.
Hope this helps some
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Old 09-25-2013, 06:10 PM   #8
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Thanks, I'll reset my req fuel to 14.7 based on my displacement.

Jason
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