1990 1.6L G28 Turbo Tune Help - Miata Turbo Forum - Boost cars, acquire cats.

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Old 09-25-2016, 06:36 PM   #1
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Default 1990 1.6L G28 Turbo Tune Help

So long time lurker first time poster. been doing a ton of reading and searching on tune settings and getting a good map built. Just got the turbo kit and need to get it running. it had a na tune my friend did but i accidently lost it when i updated the firmware. Im still learning tuner studio to which isnt helping me much. I think it is the cranking and priming pulses are too high. i can smell fuel when it cranks too.
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File Type: msq CurrentTune.msq (243.3 KB, 17 views)
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Old 09-25-2016, 07:12 PM   #2
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Old 09-25-2016, 07:35 PM   #3
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Seattle wa
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Old 09-25-2016, 07:35 PM   #4
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Old 09-26-2016, 11:04 AM   #5
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Can you post a data log of the problems you're having?
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Old 09-26-2016, 02:49 PM   #6
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Can you post a data log of the problems you're having?
I will as soon as I get home. Does the map look about right and I'm just struggling?
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Old 09-27-2016, 01:00 AM   #7
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So did these logs tonight. i can smell fuel so i know its not an issue. But when i turn the key and send the prime pulse 2 or 3 times ill get a backfire like its trying to start
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File Type: msl 2016-09-26_21.43.17.msl (95.3 KB, 8 views)
File Type: msl 2016-09-26_21.49.24.msl (83.1 KB, 9 views)
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Old 09-27-2016, 10:15 AM   #8
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Are you running stock injectors and stock fuel pressure?
It seems to be having sync issues with the CAS.Can you get a composite log of the CAS signal?
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Old 09-28-2016, 01:54 AM   #9
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Stock fuel injectors and fuel pressure. It might be a spark issue my timing light only goes off every once in a while but on cyl 3 goes off more frequently does that seem like a setting in the tune or a bad coil? Dont know if this log is what you want. also from what i read today about batch fire vs sequential pretty sure i have to be setup for batch fire since i dont have a trigger wheel thats obvious on the crank pully.
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Old 09-28-2016, 09:19 AM   #10
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I'm having trouble opening that composite log. Has it been edited?
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Old 09-28-2016, 09:25 AM   #11
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I'm having trouble opening that composite log. Has it been edited?
has not been edited I'll redo it when I get home today. As far as setting the ignition up and it not having spark often on the timing light could that be an ecu setting or a fried coil?
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Old 09-29-2016, 01:16 AM   #12
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Hopefully this log should work. got it to start for the first time today. Under the ingnition settings i had it set to falling curve instead of rising curve and it started right up. Ill set timing when i get off work tomorrow. How should i proceed on tuning from here
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Old 09-29-2016, 07:19 AM   #13
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Stock injectors on a g28? I'd be extra carfull...

Here is how to avoid your first problem, once you get it running ok again. Save the tune file in a seperate folder, in you documents or something. Call it, A tune that runs ok. Something like that so you know it's only a good ground zero, in case of emergency.

Are you using the base map from Diy? Sounds like it would b a pretty solid place for you to start the tune from.

Also, be absolutely sure you have turned on boost afr protection. This will help you to avoid total meltdown. Turn the first cut off at like 1 second. It will be annoying, but will help Zero it into a sage place quick.

Go read the last couple pages on "my 1st watercooled turbo" you will find two different ways to tune in boost.
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Old 09-29-2016, 09:24 AM   #14
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Try reversing the Ignition Input Capture setting.
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Old 09-30-2016, 01:55 AM   #15
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Quote:
Originally Posted by ryansmoneypit View Post
Stock injectors on a g28? I'd be extra carfull...

Here is how to avoid your first problem, once you get it running ok again. Save the tune file in a seperate folder, in you documents or something. Call it, A tune that runs ok. Something like that so you know it's only a good ground zero, in case of emergency.

Are you using the base map from Diy? Sounds like it would b a pretty solid place for you to start the tune from.

Also, be absolutely sure you have turned on boost afr protection. This will help you to avoid total meltdown. Turn the first cut off at like 1 second. It will be annoying, but will help Zero it into a sage place quick.

Go read the last couple pages on "my 1st watercooled turbo" you will find two different ways to tune in boost.
Ordering up the flowforce ev 14 640 cc injectors tonight to cover fuel just going to get a good base going then drop those in.

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Originally Posted by Matt Cramer View Post
Try reversing the Ignition Input Capture setting.
got it going and set the timing just now please review logs and let me know what you think. at idle my AFR is 18.5 which seems lean to me for idle then when i rev slightly it bog then wakes up a bit i know its a fuel thing there.

But it starts so im pretty stoked! Really appreciate all the help on this forum! THANK YOU !!!
Attached Files
File Type: msl 2016-09-29_22.42.56.msl (342.1 KB, 8 views)
File Type: csv 2016-09-29_22.40.37.csv (212.2 KB, 9 views)
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Old 09-30-2016, 09:09 AM   #16
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Afr on stock injectors will need to be around 14, maybe less. The ff injectors will idle fine at 14.7
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Old 10-03-2016, 01:09 AM   #17
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Got the flow force injectors today all flow matched around 670cc and took the car for its maiden voyage around the neighbor hood. it idles good when cold and hot and cruised alright so far. between 2500 and 3500 rpm and 170ish kpa it falls on its face. ill start to do a small pull and it will hit this point and loses all power. fuel looks like its in the ballpark with the rest of the area around those cells. looking at my spark table it retards quite a bit in the same area. What would you guys do?
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1990 1.6L G28 Turbo Tune Help-fuel-ve-table.jpg   1990 1.6L G28 Turbo Tune Help-ignition-table.jpg   1990 1.6L G28 Turbo Tune Help-afr-table.jpg  
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Old 10-03-2016, 04:15 AM   #18
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Check your boost cut off. Maybe fuel cutting.
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Old 10-03-2016, 06:37 AM   #19
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Post the tune. Not screen shots of it.
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Old 10-03-2016, 03:17 PM   #20
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this is the current tune. going to try changing the ignition table after work
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