Originally Posted by
phil_focus
i was just going by what you said, "most ignition possible without det"
ON A KNOCK LIMITED ENGINE ONLY
So for my cossie engine, I want as much ignition as possible when on full boost as its knock that limits the power, so every extra degree you put in increases torque, so the minimum amount of best torque, is the most ignition without det.
On my clio, if I put more ignition in at MBT then it will plateu and then start to fall.
thinking on from that, during a live map as you cant measure the actual torque figure you would have to map to MBT by just reaching the point of det, retard till you get no det and then retard some more based on whether or not the car feels less torquey and if you retard too much then advance it a little again.
Total guesswork IMHO, you can feel 5lbft difference when you are mapping a car on the road, thats why for an N/A car (ie one that isnt knock limited) you need rollers
Please note, although im talking about N/A and turbo here, its not quite that clear cut, thats only a 99% fit, some very high comp N/A engines are knock limited at points in the rev range and a low boost low comp turbo car wont be knock limited, im just generalising as its not possible to talk about every single possiblity all in one go, so people need to be aware there are exceptions to what I am saying.
would i be right in saying this?
hell, i'll come work for you (after my knee op) and learn all i can 8)
If you come and work for me, you can have the ENTIRE mapping fee that I charge on any engine me and you map together, sound fair?