DIY: ProjectLambda Stock ECU Reflash Tuning (Master Reference Thread) - Page 21 - Subaru Impreza GC8 & RS Forum & Community: RS25.com
 
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DIY: ProjectLambda Stock ECU Reflash Tuning (Master Reference Thread)
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Old 04-22-2018, 06:48 PM   #201
ImprezaRSC
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I scale my injector timing later as the revs rise, FYI.
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Old 07-15-2018, 06:17 AM   #202
danscomp
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Hey guys, having a bit of an issue with my IAT calibration.

I had the plastic IAT separate from the MAP on my car (04 RS).

Since then I got the Delphi GM fast response IAT (spec sheet eBay

And I followed the calibration data from here Updated calibration for AEM and GM IAT Sensor - NASIOC

Granted I did a little thing in excel to help interpolate to the numbers we have set.

My problem is that when I put the key in after the car has been sitting for a while (3+ days), my coolant temp will read ~22C while my IAT is at 14C. Considering my garage is definitely above 14C....I'm not sure what the issue is.

Anyone else running the GM IAT?

Last edited by danscomp; 07-15-2018 at 06:22 AM..
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Old 07-17-2018, 05:03 AM   #203
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With some awesome input from Hatecrewdeathroll, I was able to get a working table and have it sync up (or at least close enough) to my other sensors.
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Old 08-02-2018, 08:35 AM   #204
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We spent a few hours on the rollers last night with the software and my 99 RS and it was eye opening. We didn't make a single change that resulted in any power unfortunately.

Most of the night consisted of trying to figure out what table fed what table and resulted in what change. Having two COBB ProTuners trying to un-learn everything we know about that software and trying to extrapolate that knowledge to this software took most of our time.

We finally learned that it would appear Power Mode is 180 degrees off what we thought it was doing but by then it was too late to make anymore pulls. After zeroing out every table we could find we were able to achieve the opposite desired result of the AFRs from 2k to 4,600 going crazy lean as we were trying to get that range to fatten up.

So far the software seems to work amazing, flashing isn't terribly slow (faster than COBB on the VA for sure!), and once we learn what is feeding what tuning should be a breeze, certainly an improvement from the SAFC the vehicle is using now.
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Old 08-02-2018, 02:52 PM   #205
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Trying to figure out what does what in the software is what I've been trying to do since I bought it! My fuel trims are like -20% for LTFT and -3-5% for the STFT, but i havent spent enough time figuring out where to fix that (ie. using the target fuel ratio table, VE table, injector settings?).

If Project Lambda want to write a little book on how their software works theres a big chance I'll be the first to buy it haha.

Whats the specs of your motor Crawlerado? Mine is an ej251 with delta 1500 cams. Was very lean above 4500rpm, managed to get that to a stable 12:1 right up to 6200+rpm and its runing the 3bar maps sensor nively. Haven't touched timing yet as it rarely seems to make sense.. The timing figure doesn't equate to the base plus/minus any corrections and the IAM figure.
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Old 08-03-2018, 09:10 AM   #206
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Quote:
Originally Posted by crjohnson View Post
Trying to figure out what does what in the software is what I've been trying to do since I bought it! My fuel trims are like -20% for LTFT and -3-5% for the STFT, but i havent spent enough time figuring out where to fix that (ie. using the target fuel ratio table, VE table, injector settings?).

If Project Lambda want to write a little book on how their software works theres a big chance I'll be the first to buy it haha.

Whats the specs of your motor Crawlerado? Mine is an ej251 with delta 1500 cams. Was very lean above 4500rpm, managed to get that to a stable 12:1 right up to 6200+rpm and its runing the 3bar maps sensor nively. Haven't touched timing yet as it rarely seems to make sense.. The timing figure doesn't equate to the base plus/minus any corrections and the IAM figure.
Second that! I was hoping for a write up somewhere but at least we have this thread and the notes inside the software.

The engine is 100% stock per the rules of my class. We're allowed bolt ons before the t-body and after the heads as well as a piggyback. Before this came out the only tuning solution was an SAFC and ITC (both still installed and functioning for now).

My current tune is opposite yours. The car is lean from 2000 to very lean at 4500 then something crosses over at 4600 and it goes back to a nice 12:1. Sounds like I could slam some cams in and it would be close?!



Run 4 - previous max on my SAFC tune (as close as I could get it)
Run 6 - OEM tune, no SAFC (super lean until the 4600 crossover)
Run 7 - Lamda - last pull with the 'mistake' (ULTRA LEAN!)
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Old 08-03-2018, 04:41 PM   #207
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I tried to sign up to the premium access to read the "Prior RS25.com Thread" but still can't access it (have access to the RS club). Anyone know if it still exists??
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Old 08-03-2018, 06:00 PM   #208
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I feel like either the thread was deleted or the way RS25 names it's sections has changed. You can see the link has 'f5' where as now the forums are designated in the URL by not only an f# but also the name of the forum.

I've tried every combination I could figure out in case it was a URL error with no luck. I think the thread has either been locked or deleted. There was an issue some time back where a LOT of threads went the way of the Dodo.
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Old 08-05-2018, 09:12 AM   #209
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I don't have a lean condtion. Work on tip-in fueling, lower the power mode switchover points, and richen up the open loop. It was pretty straight forward. I'm also using the kpa enrichment framework.

The difficulty is that this will always be a street car ECU first. The best I could do for "race" tuning was to get it into open loop rather quickly and tune from there.



Power mode table menus:

Initial fuel ratio and final fuel ratio are very close. I've got both tables just .005 apart for their numbers for gas and e85 tunes both. Keep the tables close and AFRs won't swing quite like an angry chimp in the rafters.

Blend delay is 2. Enable delay is 1.

Throttle enable I've got set to 10% throttle all the way through the table. I cruise everywhere on the street under 10% throttle because it's just that damn responsive on twins.

Load enable I've got set to 55kpa-65kpa, basically right after tip-in.

Now, the tip-in fueling table for me has been drastically altered because I have all this air available at once, coupled to 440cc injectors. I spent a month noodling with that table and getting it right.

Injector timing is more of a leading factor than you might think. Spraying fuel at a closed valve is great for cruising, but not for power. I went up to 40deg later at higher rpms. I think you can get away with it at lower rpm on a 2.5sohc because it's inhaling so much better at low-mid rpm.

My .02. Good luck. I still like the software, but can't wait to go to real engine management. Again, this will always be a street car's ECU first. It's ruthlessly obedient to FHI first, not us.
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Old 08-05-2018, 06:53 PM   #210
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Thanks for the write up Impreza! One thing that's playing on my mind is a what a/f ratio the ecu targets when in closed loop? 14.7? Ive seen it hover around the 14.5ish mark on the wide band sensor when cruising around. But can I adjust this target af anywhere? My closed loop minimum throttle is set to like 60% up to around 4000rpms (not in front of my laptop at the moment), where as every other ej251 map I look at, its much less than that. The car still drives good, except for some hesitation down low which I think is lean. When I reload a map and reset the trims it drives great, then trims pull fuel out and it's starts to jerk a bit down low again.

Last edited by crjohnson; 08-05-2018 at 07:02 PM..
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