2023 Recommended Tune Options

[Halftim3]

First you said your car is running extremely rich then say you're currently experiencing how lean its running?

[Acarv_426]

Scheduled a session for an HTE canned tune this upcoming Saturday 4/29. I don't have a wideband or access to a dyno right now. Running a Kassel canned tune and my car is running extremely rich. I plan on eventually getting it on a dyno and dialing things in after I get my subframe reinforced and VANOS bulletproofed, which I'm getting done Monday 5/1. Hassan seems like a great guy and hopefully his canned tune will help alleviate the issues I'm currently experiencing with how rich my car is running. He assured me he would take care of it. We'll see how it goes,

[Tbonem3]

I kinda figured it would something like engine go boom boom.

That's how you get the best dyno plots (right before boom, make sure to turn off knock det).

[simon_c]

Pop

I kinda figured it would something like engine go boom boom.

[Slideways]

Interesting. I guess my question is what does the MAP sensor do in terms of function and effect on drivability?

Not much, but it is nice to have on a street car in case of TPS failure as the limp mode is better with it than without it.

https://nam3forum.com/forums/forum/special-interests/coding-tuning/8780-csl-map-sensor-function

[EthanolTurbo]

The MAP sensor is not measuring elevation change under normal driving. That sensor is in the ECU and is working even on a MAF setup.

Interesting. I guess my question is what does the MAP sensor do in terms of function and effect on drivability?

[Tbonem3]

Crazy. What's the short story?

Pop

[tnord]

from my casual tracking of the issue, a handful of motors started popping (from running too lean?). I definitely remember him being the bees knees for a year or two. I think one unfortunate soul even built a brand new badass motor, put a frank smith tune on it and it blew pretty quickly.

[simon_c]

Got found out as a hack.

Crazy. What's the short story?

[Slideways]

It says it's emergency mode in case of a fault, which means it's probably not used in normal driving is my guess and also the reason a dedicated MAP setup drives much better as elevation changes.

The MAP sensor is not measuring elevation change under normal driving. That sensor is in the ECU and is working even on a MAF setup.

[EthanolTurbo]

The atmospheric pressure sensor is in the ECU itself. CSL tech doc states: "In order to ensure that the engine can run in emergency mode without an air mass flow meter function if a fault such as failure of the throttle-valve potentiometer occurs, the M3 CSL has an additional pressure sensor on the idle-air rail so that the pressure on the engine-side of the throttle valves can be analyzed."

It says it's emergency mode in case of a fault, which means it's probably not used in normal driving is my guess and also the reason a dedicated MAP setup drives much better as elevation changes.

[Slideways]

I would say MAP is pretty critical if you plan to drive the car at different altitudes, otherwise it's probably going to drive like shit as it tries to adjust.

The atmospheric pressure sensor is in the ECU itself. CSL tech doc states: "In order to ensure that the engine can run in emergency mode without an air mass flow meter function if a fault such as failure of the throttle-valve potentiometer occurs, the M3 CSL has an additional pressure sensor on the idle-air rail so that the pressure on the engine-side of the throttle valves can be analyzed."

[Tbonem3]

Got found out as a hack.

[simon_c]

Whatever happened to Frank Smith? He was a super hot tuner a couple of years back. Just curious to know what happened. I've been on the boards long enough that every couple of years that there is always a new tuner. I do remember Hassan being an active member on the old m3f boards.

[EthanolTurbo]

Not really, the two or three mentioned above have a good amount of experience tuning the airbox setup with various cam and exhaust configurations. There is no MAF option and in case you meant MAP, it is not critical as the CSL is basically running Alpha-N. The only necessary upgrade is having the MSS54HP ECU or converting a MSS54 to HP. There should be no issues with low end drivability.

I would say MAP is pretty critical if you plan to drive the car at different altitudes, otherwise it's probably going to drive like shit as it tries to adjust.