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lance wrote:
Finally, for boosted engines, you subtract 0.3° of advance for every kPa above 100 (it's not a coincidence that this is the same factor as for the 'vacuum' adjustments). Because 101.3kPa=~14.7psi, this works out to ~2° per pound of boost. It is often the case that you want to limit the retard under boost as well, typically so that it takes out no more than about ½ of the maximum advance at 100 kPa.
Lance.
Leistung Elektronik wrote:lance wrote:
Finally, for boosted engines, you subtract 0.3° of advance for every kPa above 100 (it's not a coincidence that this is the same factor as for the 'vacuum' adjustments). Because 101.3kPa=~14.7psi, this works out to ~2° per pound of boost. It is often the case that you want to limit the retard under boost as well, typically so that it takes out no more than about ½ of the maximum advance at 100 kPa.
Lance.
Hi Lance,
I don´t understand because you substract to much advance degrees when the engine ist under boost. We run a 1.6 L Fiat engine under 30 PSI of boost with 22° final and no detonation. What ist wrong?? Have you considered any CR (9:1 ; 10:1 ; etc) ?
I apreciate your help, because i´m trying to find a simple metod for make a start advance table for boosted engines.
Thanks
burgo90 wrote:yes i downloaded that but its only a viewer so i cant put my own values in to create my own table
When I paste the results in a MS2 vex it's actual.Ferret wrote:Is this formula good for all Megasquirt versions (MSnS, EDIS, Extra...) or just for some of them?
QldRobbo wrote:I must be missing something....
I'm assuming that 20kpa at 800rpm would be able idle, using the formulas above I get 31 degrees of advance at idle.... shouldn't this be more like 10 degrees?
QldRobbo wrote:I must be missing something....
I'm assuming that 20kpa at 800rpm would be able idle, using the formulas above I get 31 degrees of advance at idle.... shouldn't this be more like 10 degrees?
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