CSL MAP Sensor Solutions

[NZ_M3]

for the spacing, I’d just shave 1.5+ mm off the sensor nose. You don’t need to be precise.

This is what I do and works perfect 👍 you don’t actually need to shave that much off we are talking a fraction really. Takes a whole minute to do.

[duracellttu]

This is what I do and works perfect 👍 you don’t actually need to shave that much off we are talking a fraction really. Takes a whole minute to do.

Do you have the specs on the OEM MAP sensor o-ring? If the new Bosch sensor needs a thicker o-ring to seal correctly in the OEM air rail, where can we source these?

[BMWahba]

This is what I do and works perfect 👍 you don’t actually need to shave that much off we are talking a fraction really. Takes a whole minute to do.

This is if you have an OE CSL air rail only? I want to do that method but it seems those are not readily available. I should have bought one months ago when they were in stock.

[ATB88]

Just a thought: why didn't BMW just have the MAP sensor mount to the airbox itself? Like the IAT? Seems like that should have been the best solution. Then no need to design and produce a new air rail? Is there a reason why this would have given worse or less accurate readings?

[terra]

Just a thought: why didn't BMW just have the MAP sensor mount to the airbox itself? Like the IAT? Seems like that should have been the best solution. Then no need to design and produce a new air rail? Is there a reason why this would have given worse or less accurate readings?

The airbox isn't under vacuum. You need to measure the pressure between the throttle bodies and the cylinder head. They decided taking the stock air rail and brazing on a map flange is the way to go.

[gaatiyeh]

This link will also shed some light on the subject.. check out the video description for the parts used.

https://www.youtube.com/watch?v=1VWGQ71_gQk

[simplem3]

Bringing life back to this thread to get some clarity, advice and input from others that went with the CSL air line route.

My current parts list specific to the MAP sensor conversion/installation includes:

- OEM CSL air rail 13417833597
- Bosch MAP sensor 0261230101
- OEM harness pigtail adapter 83300413582
- Viton 8mm ID x3mm O-ring

I'm curious what ECU programming route other have taken for the MAP sensor. Kassel Performance appears to be a popular and solid choice.

I was also hoping to get some suggestions on the cleanest and simplest option to wire the MAP sensor to the DME. From what I got out of the information posted by NZ_M3 in the cslresgister forum, with the CSL air line and Bosch sensor, the cleanest and simplest way to do it is use the BMW plug harness pigtail connector, part# 83300413582, and run that from the senor to the DME. Is that correct? Are there any other parts or modifications required? I haven't found any other posts where that's been discussed or performed which makes me reluctant to attempt it. It appears to be an OEM plug-n-play solution which screams 'no-brainer' to me, but maybe I'm missing something.
Lastly, for the installation location of the IAT sensor in this scenario, is heat-soaking something that needs will still need to be addressed? My current plan is to install it in the designated slot on the airbox. I'll be using the OEM sensor, part# 13621739510.

I chose not to include the snorkel as part of my setup because I don't have the CSL bumper so I didn't see the value in it.
Looking forward to some good responses that will help me and others with their pending projects. Feel free to provide other relevant tips and tricks gained through your experiences. Thanks

[beyondm3]

Bringing life back to this thread to get some clarity, advice and input from others that went with the CSL air line route.

My current parts list specific to the MAP sensor conversion/installation includes:

- OEM CSL air rail 13417833597
- Bosch MAP sensor 0261230101
- OEM harness pigtail adapter 83300413582
- Viton 8mm ID x3mm O-ring

I'm curious what ECU programming route other have taken for the MAP sensor. Kassel Performance appears to be a popular and solid choice.

I was also hoping to get some suggestions on the cleanest and simplest option to wire the MAP sensor to the DME. From what I got out of the information posted by NZ_M3 in the cslresgister forum, with the CSL air line and Bosch sensor, the cleanest and simplest way to do it is use the BMW plug harness pigtail connector, part# 83300413582, and run that from the senor to the DME. Is that correct? Are there any other parts or modifications required? I haven't found any other posts where that's been discussed or performed which makes me reluctant to attempt it. It appears to be an OEM plug-n-play solution which screams 'no-brainer' to me, but maybe I'm missing something.
Lastly, for the installation location of the IAT sensor in this scenario, is heat-soaking something that needs will still need to be addressed? My current plan is to install it in the designated slot on the airbox. I'll be using the OEM sensor, part# 13621739510.

I chose not to include the snorkel as part of my setup because I don't have the CSL bumper so I didn't see the value in it.
Looking forward to some good responses that will help me and others with their pending projects. Feel free to provide other relevant tips and tricks gained through your experiences. Thanks

I'm on the cusp of doing this and would like to give it a good bump.

Is the Kassel a solid solution or is OEM the best way to go?

[duckfoo]

Was planning on getting COVID-19's MAP Sensor, but unfortunately I can't post on it. Has anyone done this with Velocity Stacks?

[karter16]

I'm on the cusp of doing this and would like to give it a good bump.

Is the Kassel a solid solution or is OEM the best way to go?

FYI if you're going the CSL air rail route I've designed a 3D printed adapter to help the Bosch '101 sensor fit better. On mobile at the moment but if you check out the CAD parts sticky you'll find it.


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[RazorM]

What is the consensus about map location after some time? Is there any real functional advantage of using CSL air rail opposed to an Kassel style map location?

[m3_tristan]

What is the consensus about map location after some time? Is there any real functional advantage of using CSL air rail opposed to an Kassel style map location?

I ordered this. IMO it’s the best solution and it is all plug and play.

https://auto3design.co.uk/online-shop/ols/products/e46-m3-intake-air-temp-iat-csl-map-conversion-kit

[D-O]

I have only had my CSL intake installed for a short while. I went with the COVID-19 setup because it is simple, inexpensive, and easy to install. So far the car runs perfectly.

[karter16]

What is the consensus about map location after some time? Is there any real functional advantage of using CSL air rail opposed to an Kassel style map location?

I doubt it makes too much difference (edit: this is not the case for the Kassel location, see Heinz's post below). Theoretically there's a small amount of propagation time to the brake booster location but not sure how much it would matter in practice.

That said, if you have M3 cams and aren't running the Mullet Tune your MAP integrator is probably spending a lot of its time bouncing off its limits anyway, which is a much bigger impact. For those on the Mullet tune it would be interesting to get some comparative logging to compare the brake booster line location with the CSL rail and see if there's any detectable differences.

Even better would be for someone to install both at once and log raw data off both to compare. That would give us the real answer.


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[heinzboehmer]

I doubt it makes too much difference. Theoretically there's a small amount of propagation time to the brake booster location but not sure how much it would matter in practice.

That said, if you have M3 cams and aren't running the Mullet Tune your MAP integrator is probably spending a lot of its time bouncing off its limits anyway, which is a much bigger impact. For those on the Mullet tune it would be interesting to get some comparative logging to compare the brake booster line location with the CSL rail and see if there's any detectable differences.

Even better would be for someone to install both at once and log raw data off both to compare. That would give us the real answer.


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IMO, the real benefit comes from the sensor reading a smoothed pressure wave with the OE CSL or brake booster solutions (thanks to how far away the sensor sits from each individual cylinder), instead of a series of pulses with it right next to the throttle body on the Kassel solution.

I'm running the OE CSL rail and Bryson has the brake booster kit. Our readings are pretty much bang on. I should have bought an extra sensor and left the Kassel kit installed to do some AB testing, but I can for sure say that readings looked like pulses instead of a smooth wave with it.

+1000 to your tune comment.