- Sun Mar 07, 2021 6:53 pm
#48818
There are various ways to manipulate the numbers, as they are all multipliers in the PW calculation. First you should consider that you told it you had 6 cylinders and 6 injectors on 750cc and 4S, so it's calculating for that, but only using half the fuel flow (injectors) on half the displacement, but every stroke. You can change injector size, displacement, or manually enter a new Req_fuel value, for examples. I find R_f almost always needs manual manipulation, as it is only a calc based on estimates, and rarely spot-on.
For that example, I run the engine to fully warmed, and run different low-load table areas which should be 14.7 everywhere by the calculator. It won't be. I find the trend of Lambda (generally rich or lean overall), and adjust R_f to bring the table generally towards the calculated target, without changing VE values. Now the table more approximates the intended AFR/Lambda the calculator produced. Begin VE tuning, which should be much closer than it started with.
Likewise (or in addition), I may change the R_f in order to increase low-PW resolution and control, and other purposes. So don't let it bother you if you want to try almost any manipulation in order to find suitable ways to correct for estimates and errors or to work-around other issues. You can always go back with a click.
David
For that example, I run the engine to fully warmed, and run different low-load table areas which should be 14.7 everywhere by the calculator. It won't be. I find the trend of Lambda (generally rich or lean overall), and adjust R_f to bring the table generally towards the calculated target, without changing VE values. Now the table more approximates the intended AFR/Lambda the calculator produced. Begin VE tuning, which should be much closer than it started with.
Likewise (or in addition), I may change the R_f in order to increase low-PW resolution and control, and other purposes. So don't let it bother you if you want to try almost any manipulation in order to find suitable ways to correct for estimates and errors or to work-around other issues. You can always go back with a click.
David
-= If it was easy, everyone would do it =-