mikey_audiogeek

Good work Eric!
My car is 1991 ex-Japan so has the region coding plug. I changed from setting 2 to 1 (pulled the plug) and it seemed to help stop the cat from clogging up so much (seat of the pants dyno).
The workshop manual suggests that the settings were eliminated from 1990 onwards. I believe this is when the ROW cars went to cat.

However it would be interesting to see whether they left the different maps in the ECU and just "deleted" the reference to coding plugs. I suspect this is the case.

Rogue_Ant

All the DMEs I've looked at, the ROW used different maps then USA...

Rogue_Ant

Ok, S2 people... I had a chance to flow a couple 16V AFMs.

The sensor does max out at ~4.6volts. But the actual airflow vs volt curve is pretty sharp. At 4.6volts the sensor is flowing ~450CFM. This should be enough to meter close to 300hp!

So you supercharged S2 types, your AFM is good for quite a bit of power, and with a piggyback you can take advantage of the range above the AFMs limit, the 4.6-5.0 volt range.


-Rogue

Eric_Oz_S2

Do you have a graph of airflow vs voltage you could post?

If using the AFM, I presume you could only run in draw through (upstream of sc) arrangement. This would then produce some inherent lag in the system I would imagine.

Rogue_Ant

Give me a few minutes and I'll post CFM vs volt graph...
The AFM was designed to be draw-through, and even being upstream of an SC, I doubt you experience much lag.

DHC6

whatchu talkinbout Willis?

So though this tuning guide I can get close to 300hp from my 3.0L? That is very impressive. I am not fully confident with playing with settings, (still learning about tuning in this manner, have no problem with a wrench, but still learning how to tune with a laptop). So forgive my ignorance, but is it possible up load your profile/map to my DME chip? Or would I have to change all the settings as you have done?

Rogue_Ant

Well it means that the stock 16v AFM will meter that much air... The 3.0 will not pull that much air without some serious mods, like a supercharger.
The tune I run is for the 951, and will not work with the S2. I released a DIY tuning for the S2, and the files are posted earlier in the thread. This way you can tune the car yourself. And to get you started, I provided a base-map.

Rogue_Ant

Here is the 16v AFM flowchart:



If you want a larger version - shoot me an email/PM with your email, and I'll send it to you.


-Rogue

DHC6

ah, ok I understand a bit better now. Thanks answering my less then informative questions (didn't catch that you were talking about the turbo engine and not the 3.0L S2. I think I will get the eprom reader you suggested at the beginning of the thread and give this tuning a try my self! Thanks again, and great thread.

Rogue_Ant

Ah, no. The AFM flow data I posted is for the 3.0L S2 (& 2.5L S).
I'm just saying that there is quite a bit of flow headroom left in the stock AFM.

mikey_audiogeek

Brilliant - thanks Rogue!

Mike

CorsePerVita

Anyone considered saying goodbye to the original ECU and doing something like megasquirt on a 944? I've seen a few setups (not 944 specific) and have a buddy who recently completed an engine swap + ms run on a VW Jetta engine, running straight map and was impressed. I like seeing tuning threads and what people are doing to improve on and tune up these cars. I know there's been a lot of 924 megasquirt conversions but have not once seen one on a 944. Seems to me it would actually be easier since you already would have an injection system, locations, and most the work done to do it already. Been toying with the idea on my N/A. I'm actually doing a conversion on my 924 that is in process and now that I'm working on it am going "Hmmmmm it's tempting" on the 944 LOL.

blown 944

There have been a few that have converted to ms. I think it is not in the spirit of this thread though as it is expounding on the dme and the tuning capabilities therein. Not to mention that it is something many are not comfortable with.

I think there are a couple ms users on pelican

With all that said I applaud Josh once again for adding so much to this community and hopefully he is as appreciated by all as his efforts have been for me.

GTSilver944

^ Sid, I have a PM for you but your inbox is full.

Rogue_Ant

Thanks Sid

Max, are you back in town...? I have something really cool for the 944NA guys up my sleeve, and I need an NA to test/tune.