DIY tuners and mappers unite
Discussion
Pink_Floyd said:
Are you running MS with a wideband lambda, if so what happens when the lambda is cold and warming up, do you use some default in the tables untill the lambda starts giving sensible results.
I have a Techedge but its not connected to MS at the moment. Cant think why not. Its something i need to do i think. At least for datalogging
Pink_Floyd said:
Are you running MS with a wideband lambda, if so what happens when the lambda is cold and warming up, do you use some default in the tables untill the lambda starts giving sensible results.
MS uses another table for this condition WUE (WARM UP ENRICHMENT) and you can stop/edit the Lambda probe from going closed loop till a certain coolant temp is met for example 75 degrees if you want and providing your using CL feedback, if your not then your just using the WUE table during warm up, as mentioned already there is an auto-tune function for the WUE currently in Beta form and under testing in the latest paid for TunerStudio update 
set your AFR targets for warm up and your off ........ hopefully 
although I don't think its necessary IMO 
Edited by Sardonicus on Thursday 11th April 11:12
SILICONEKID350HP said:
The spark table needs more work .It could be worked on higher up the rev range..
I`m very frustrated not knowing how to tune the engine ! I want to use the auto tune but i`m clueless.
Should the current tune come straight on the screen once it`s plugged in ?
Who is tuning Alpha N TPS or Map ?
When does it go from open to closed loop ? and how would I know if the lambdas are cslibrated without comparing them to a rolling road .
How can the megasquirt be tuned for closed loop ? so many questions ..I want to go to Megasquirt school ..
I use a combination of Autotune, VE analyser in Megalog Viewer and some manual smoothing in Excel. I`m very frustrated not knowing how to tune the engine ! I want to use the auto tune but i`m clueless.
Should the current tune come straight on the screen once it`s plugged in ?
Who is tuning Alpha N TPS or Map ?
When does it go from open to closed loop ? and how would I know if the lambdas are cslibrated without comparing them to a rolling road .
How can the megasquirt be tuned for closed loop ? so many questions ..I want to go to Megasquirt school ..
Autotune is handy if you are out in the car and want to make changes on the fly. Here’s a few pointers although I’ve only worked this out from trial and error.
- Don’t use the ‘auto update controller’ as this will make any of your logs useless for any further tuning using the VE analyser function in megalogviewer as you won’t have a base tune for comparison.
- Set the filters so that autotune does not adjust the map when warm up enrichment is on. Otherwise the software will lean out the MAP to compensate.
- Start logging within tuner studio and then start auto tune.
- Go for a drive and see what changes autotune recommends to the MAP. If you are happy with them, Click to burn the changes to the ECU. Before doing this its good idea to stop data logging and save the current tune so that you can use the log with Magalogviewr later. I usually save the logs and tune files with similar names, i.e. run1, run2 etc.
- Repeat above until you are happy.
When you connect your laptop, tunerstudio will compare the setting on the ECU with those in tunerstudio. If there are any changes you will get the option to either select the tunerstudio settings (if you have made changes) of the ECU settings.
I’m using Alpha-N pretty sure you are too if Phil set it up.
I Haven’t used EGO control yet and have the controller authority set to Zero. I think it only really works well during cruising and won’t have time to react during acceleration, deceleration or high loads, so you still need to get the VE table correct first.
Calibration of the Lambda’s is usually done free to air before installation. Mine has a calibration button on the controller for this.
Edited by angus99 on Thursday 11th April 11:15
Pink_Floyd said:
Are you running MS with a wideband lambda, if so what happens when the lambda is cold and warming up, do you use some default in the tables untill the lambda starts giving sensible results.
Closed loop isn’t used during start-up so the warm up time for the Lambda isn’t an issue. Initially the fuel is controlled by the cranking settings (cranking pulse width) until the engine speed exceeds the cranking RPM (default setting is ~300rpm) Above this RPM the VE table is used to Control the fuelling with additional After Start Enrichment (ASE) and Warmup Enrichment (WUE).
db418BHP said:
I just got back home after a 331 mile drive in just over 4 and a half hours. The first 200 miles was done in under 3 hours and i tanked up with just 31.5 litres that equals 28.8 mpg. I must have done something right with the recent mapping. Happy as
Everyday a school day Derek nice one 
db418BHP said:
I am going to modify my spark table like this and go check the fuelling in the same areas tonight
it does amaze me everytime i see a car set up on the rollers with aftermarket ecu's, they never seem to do anything with the ignition map like your original one, and once you map the fuel and then change the ignition the fuel map is then useless so start all over again!.Just out of interest dont be shy to run lots of advance on part throttle, a stock rover dizzy runs 50deg on cruise.
And derek get rid of that 34deg at the topend bud, just flatline it at 28, no more power is gained but a very risk of detonation or melting something.
v8 racing said:
it does amaze me everytime i see a car set up on the rollers with aftermarket ecu's, they never seem to do anything with the ignition map like your original one, and once you map the fuel and then change the ignition the fuel map is then useless so start all over again!.
Just out of interest dont be shy to run lots of advance on part throttle, a stock rover dizzy runs 50deg on cruise.
And derek get rid of that 34deg at the topend bud, just flatline it at 28, no more power is gained but a very risk of detonation or melting something.
Cheers Rob, these are the sort of no nonsense comments i need. I will make some changes and retune on the fly and report back.Just out of interest dont be shy to run lots of advance on part throttle, a stock rover dizzy runs 50deg on cruise.
And derek get rid of that 34deg at the topend bud, just flatline it at 28, no more power is gained but a very risk of detonation or melting something.
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