16v MAF Conversion
07-06-2023, 10:08 AM
#2
Three Wheelin'
Join Date: Oct 2021
Location: Southern WI - 89S2 Megasquirt PNP
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I looked into this and decided it was better to just go to Megasquirt using the DIYAutotune PNP kit. This will allow you to go to speed density which doesnt require any air metering at all (uses a MAP + IAT sensor) thereby removing the AFM restriction to free up more power. An added bonus is you can fully tune your car's ignition timing, and fuel maps, you are able to achieve full OBD2 diagnostic capabilities (able to log and see every sensor signal directly), and add other cool features such as launch control and flat shift.
There is a fairly steep learning curve, so may not be for everyone. For me, I am overall very pleased and after some work getting the car tweaked and setup, actually runs better than with the old Motronic system. An added bonus was that I learned an incredible amount about tuning cars overall as part of the "learning by doing" process. More info can be found here: https://www.diyautotune.com/product/...sche-944-s-s2/
At one point I did reach out to Vitesse and I believe they said they could do a 16V MAF conversion - but that was a while ago. I found them most responsive on Facebook messenger. Might be worth reaching out.
There is a fairly steep learning curve, so may not be for everyone. For me, I am overall very pleased and after some work getting the car tweaked and setup, actually runs better than with the old Motronic system. An added bonus was that I learned an incredible amount about tuning cars overall as part of the "learning by doing" process. More info can be found here: https://www.diyautotune.com/product/...sche-944-s-s2/
At one point I did reach out to Vitesse and I believe they said they could do a 16V MAF conversion - but that was a while ago. I found them most responsive on Facebook messenger. Might be worth reaching out.
Last edited by walfreyydo; 07-06-2023 at 10:12 AM.
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FeedMyAddiction (07-10-2023)
07-10-2023, 04:40 PM
#3
4th Gear
Thread Starter
I looked into this and decided it was better to just go to Megasquirt using the DIYAutotune PNP kit. This will allow you to go to speed density which doesnt require any air metering at all (uses a MAP + IAT sensor) thereby removing the AFM restriction to free up more power. An added bonus is you can fully tune your car's ignition timing, and fuel maps, you are able to achieve full OBD2 diagnostic capabilities (able to log and see every sensor signal directly), and add other cool features such as launch control and flat shift.
There is a fairly steep learning curve, so may not be for everyone. For me, I am overall very pleased and after some work getting the car tweaked and setup, actually runs better than with the old Motronic system. An added bonus was that I learned an incredible amount about tuning cars overall as part of the "learning by doing" process. More info can be found here: https://www.diyautotune.com/product/...sche-944-s-s2/
At one point I did reach out to Vitesse and I believe they said they could do a 16V MAF conversion - but that was a while ago. I found them most responsive on Facebook messenger. Might be worth reaching out.
There is a fairly steep learning curve, so may not be for everyone. For me, I am overall very pleased and after some work getting the car tweaked and setup, actually runs better than with the old Motronic system. An added bonus was that I learned an incredible amount about tuning cars overall as part of the "learning by doing" process. More info can be found here: https://www.diyautotune.com/product/...sche-944-s-s2/
At one point I did reach out to Vitesse and I believe they said they could do a 16V MAF conversion - but that was a while ago. I found them most responsive on Facebook messenger. Might be worth reaching out.
07-10-2023, 06:54 PM
#4
Three Wheelin'
Join Date: Oct 2021
Location: Southern WI - 89S2 Megasquirt PNP
Posts: 1,261
Received 280 Likes
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No MAF needed, all you need is the IAT sensor. DIY autotune sells a kit for it and youll need a pipe with a bung welded to it (there are some on ebay already welded). The IAT sensor wires directly into the OEM AFM harness wires (5 wires, 3 are for potentiometer, 2 are for IAT).
You will also need a wideband O2 and variable TPS (944 NA's and S/S2 are binary unlike the turbo). Ive read that the 944's use the same binary TPS and the M20/M30 BMW's and you can use this conversion kit to run a BMW M50 variable TPS. I have not tried this personally though, as I installed a 968 manifold and TB, and the 968 already uses a variable TPS.
Since youll be converting to speed density, using the MS PNP kit all you need is the integrated MAP sensor (part of the megasquirt PNP kit) and IAT sensor to get the car running. However, it is highly highly recommended to have a wideband O2 (for tuning) and variable TPS (for TPSdot accel enrichment).
You will also need a wideband O2 and variable TPS (944 NA's and S/S2 are binary unlike the turbo). Ive read that the 944's use the same binary TPS and the M20/M30 BMW's and you can use this conversion kit to run a BMW M50 variable TPS. I have not tried this personally though, as I installed a 968 manifold and TB, and the 968 already uses a variable TPS.
Since youll be converting to speed density, using the MS PNP kit all you need is the integrated MAP sensor (part of the megasquirt PNP kit) and IAT sensor to get the car running. However, it is highly highly recommended to have a wideband O2 (for tuning) and variable TPS (for TPSdot accel enrichment).
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bobinnova (02-27-2024)
