Quote:
Originally Posted by Kodename47
So why not change the PI angle then, seeing as that injects the whole 720 degree cycle?
It's fine throwing out theories, but you have yet to show me why changing the DI angles is beneficial or makes any improvement. So you'd inject later in the cycle? Does this not impact on fuel mixture within the cylinder, which could have a negative impact on performance? How does that impact charge cooling (one of the main reasons for DI)?
@ Matt@Cosworth care to chime in seeing as you've done the most extensive testing? |
if you change the inlet cam timing then the injection timing should travel with it, on very highly tuned engines ( F1) with pfi the injection timing map varies by 200 degrees
the gains are small however on the FA20 as its not that strongly tuned
I found about 3-4Bhp on our supercharger tune by varying the DI timing in conjunction with the altered cam timing and little extra by varying the PFi timing also