Engine Control Question

[Greg Hermann]

>Working from memory here, but at 5000 RPM,
> I think you have less than 13ms between intake events
>with a 4 stroke engine.

Times 2!! Closer to 24ms per cycle at 5000rpm on a FOUR stroke.


  I'm wondering what calc is
>taking place to give you the numbers you mentioned.
>Your time window decreases as RPM increases..
>Does anyone have the formula?
>I'm not where I can scan the archives.
>Mike V
>
><<>When speeding up from a dead stop at WOT, the fuel injector pulse width is
>>around 12.2ms.  Once it goes above 3700 rpm or so, it starts to slowly
>>decline until it hits 5200 (right before shifting).  At 5200 rpm the pulse
>>width is 9.8ms.  Why would this be?  Is this so the engine doesn't melt :),
>>or for emissions reasons.  If this stayed at 12.2ms right to the shiftpoint,
>>would this generate more power?
>>
>>Also, this thing has the 730 ECM.  How many frames per second on this baby?
>>(I asked this before, but now know exactly what to specify :)  Has anyone
>>found out anything about the MEMCALs for this ECM?  I have the eeprom loaded
>>in if anyone wants to take a look..
>>>>