Mark@Abbey m/s Posted January 21, 2013 Share Posted January 21, 2013 1 of the things we notice when we tune the 350Z is how far the actual AFR’s are away from what the ECU require. So when we remap the stock ECU using the UPREV software we adjust the compensation map to hit the actual required AFR maps within the calibration loaded into the stock ECU. This is what we say even fitting performance enhancing mods the cars don’t give anymore bhp/torque until we re-tune the stock ECU YELLOW bank 2 AFR DARK BLUE Bank 1 AFR LIGHT BLUE required AFR STOCK MAP TUNED MAP on Abbey Dynapck Dyno Mark 1 Quote Link to comment Share on other sites More sharing options...
wizard Posted January 21, 2013 Share Posted January 21, 2013 Interesting... Why is the stock map so off-target? Is it because Nissan pre-load a 'one size fits all' to each car before it leaves the factory and it sometimes won't be an exact fit to each motor? How is the target AFR determined? Quote Link to comment Share on other sites More sharing options...
Mark@Abbey m/s Posted January 21, 2013 Author Share Posted January 21, 2013 Target AFR is in the stock calibration more to do with part throttle closed loop AFR Target MAP is below this uses the compensation map to get the injector end final figure i.e injector duty Stock compensation map below when you compare the stock compensation map to the Abbey tuned map to get the AFR in the target maps you see that's why the cars need tuning to be the proper gains from when mods are added; Abbey tuned compensation map we also tweak the AFR target maps but you get the jist of what I am saying. I am saying every car is different so that's why we say to get the best from the car it requires dyno work but we know the car's real well we can give a fairly good base map but the final works to make 100% spot on needs dyno time; when the car is in closed loop lower load area's the compensation map numbers if they are a far from the ideal position it takes time for the car to hit the AFR target so again we tweak the compensation numbers to make the car hit the AFR targets quicker. Stock map is computer generated with cold start hot start tweaks , when we tune it is done live so any changes in the car we tune for. hope this helps. Quote Link to comment Share on other sites More sharing options...
HaydnH Posted January 22, 2013 Share Posted January 22, 2013 You can tell I've been promoted to management, all I understand from the above is that the pretty colours on the graph look more organsied. Quote Link to comment Share on other sites More sharing options...
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