- Sun Jun 30, 2019 2:15 am
#36015
@69 Spitfire G10 - that's all great, but does not state why you need two tunes. Just that his system apparently did not allow extended table capability that Speeduino (and most modern ECMs) have. I think you feel there is a problem that doesn't actually exist for this system. The question is not if more boost needs more fuel, or less timing; that is obvious. Not to be too blunt, but it is irrelevant why his system could not, as Speeduino can. His older system and Speeduino do not work the same. Again, until you understand or use a system like Speeduino, it may be confusing to how it operates differently to other and older systems and what it is capable of.
Your "crazy Latvian guy" tells how he changed fueling and timing, without saying why he needed that capability beyond they typical capabilities of modern systems. Again, if you could outline the reason(s) why this is not possible on Speeduino in standard form, then we could analyze why and how it could be resolved.
It needs more fuel and less timing at 150kPa? No problem. Even more and less for 200 or 600 kPa? Again, no problem, assuming you have the right parts. Or, much leaner and far more timing at 50 kPa for economy? Well, you know the answer, all in one tune. Again (again), if you have a special issue or consideration as already mentioned, tell us exactly what that is. Else, this system should work fine for controlling your turbocharged G10 for maximum performance, both in power and in economy, in 'standard' form. Comparing how his system and this system work is a poor use of time and effort. Learn this system and go do it. Or, use his system and do it his way. No problem. Your choice.
David
69 Spitfire G10 wrote: ↑Sat Jun 29, 2019 11:24 pmOn the fly really isnt that important but id love to hear the official view of it.No official view here, because 1) it's only my opinion based on knowing how various types of systems are tuned and function, and 2) there cannot be an official (or any other) position on a possible problem that has not been described.
69 Spitfire G10 wrote: ↑Sat Jun 29, 2019 11:24 pm"The differences between tuning files are less aggressive ignition mapping and reduced injection mapping combined with lower boost pressure.Absolutely correct on the goal, and seamlessly handled by Speeduino tables. As already mentioned, with Speeduino you do this with your throttle, placing the engine operation into specific areas of the tables, providing different fueling, ignition timing, AFR targets, etc.
Your "crazy Latvian guy" tells how he changed fueling and timing, without saying why he needed that capability beyond they typical capabilities of modern systems. Again, if you could outline the reason(s) why this is not possible on Speeduino in standard form, then we could analyze why and how it could be resolved.
69 Spitfire G10 wrote: ↑Sat Jun 29, 2019 11:24 pmThis is his explanation of why he needed dual tune.Again, he does not say why, but only how he had to do it with a different older system. Speeduino does not have the limitations of EEPROM chips nor require an EEPROM extender, nor require switching them, nor using an emulator to tune. As shown in the Wiki, a Speeduino table will respond to any tuned conditions with the proper timing and fuel with software-configured tables. Extend or shrink them as you like and is appropriate for the engine setup from idle to nearly unlimited boost - configure it, tune it, and it will do what you tell it to do.
So it sounds like I was about right that he had needed different fuel map targets and timing.
It needs more fuel and less timing at 150kPa? No problem. Even more and less for 200 or 600 kPa? Again, no problem, assuming you have the right parts. Or, much leaner and far more timing at 50 kPa for economy? Well, you know the answer, all in one tune. Again (again), if you have a special issue or consideration as already mentioned, tell us exactly what that is. Else, this system should work fine for controlling your turbocharged G10 for maximum performance, both in power and in economy, in 'standard' form. Comparing how his system and this system work is a poor use of time and effort. Learn this system and go do it. Or, use his system and do it his way. No problem. Your choice.
David
-= If it was easy, everyone would do it =-