BMW M50 NV Tuneing. Also MAP vs TPS for load.
Posted: Wed Apr 04, 2012 12:50 am
Ok guys, I have a BMW M50 non vanos engine and am running a S80 pro.
I have the engine running and driving but I want to confirm a few things before I continue tuning..
Firstly, sensor position. I worked mine out to be 88 degrees, but I wasnt sure where to start counting from the missing teeth. It seems to be close with the timing light, but does anyone know for sure what the sensor position is for the BMW M50 non vanos engine?
Load axis... TPS or MAP? MAP makes more sense to me, and thats what I have been using and feel most comfortable with. When using MAP as load, are the MAP compensation tables active? (Actually just checked and seems these can be disabled). Am I correct in thinking that I should disable this table when using MAP as load.
My engine appears to idle best at around 12.5:1 AFR, this seems far too rich to me for idle, if i bring it up to around 13:1 i start to get misses or pops out the exhaust. I am using a Innovate MTX-L wideband and what reads on the wideband gauge is accurate with what the DTA is seeing (so seems to be no voltage offsets). I wonder if the wideband is reading incorrectly, or maybe timing can or will affect what an engine likes for idle (comes back to is my sensor position is correct?)
I think this is all for now, and I feel I need to clear these questions up before I should continue tuneing and further.
I have the engine running and driving but I want to confirm a few things before I continue tuning..
Firstly, sensor position. I worked mine out to be 88 degrees, but I wasnt sure where to start counting from the missing teeth. It seems to be close with the timing light, but does anyone know for sure what the sensor position is for the BMW M50 non vanos engine?
Load axis... TPS or MAP? MAP makes more sense to me, and thats what I have been using and feel most comfortable with. When using MAP as load, are the MAP compensation tables active? (Actually just checked and seems these can be disabled). Am I correct in thinking that I should disable this table when using MAP as load.
My engine appears to idle best at around 12.5:1 AFR, this seems far too rich to me for idle, if i bring it up to around 13:1 i start to get misses or pops out the exhaust. I am using a Innovate MTX-L wideband and what reads on the wideband gauge is accurate with what the DTA is seeing (so seems to be no voltage offsets). I wonder if the wideband is reading incorrectly, or maybe timing can or will affect what an engine likes for idle (comes back to is my sensor position is correct?)
I think this is all for now, and I feel I need to clear these questions up before I should continue tuneing and further.