Hey FFS this was not a dig at you Stu.

"At 3000rpm with a cam of 260 degrees duration, we have approximately 38milliseconds available to us when the intake valve is actually OPEN..."

I read the above sentance by you, and simply said I disagree. I'm sorry if you feel I'm having a dig but I was simply saying that I disagree. (It's open for 14.4ms at 3000rpm)

However I know you were actually quoting available open injector time, but this is'nt the same open inlet valve!

You also said that injector size must increase exponentially as rpm rises and again I disagreed with this. Of course injector size goes up as bhp goes up, and the fixed switching time of the injector time does add a constant factor that must be calculated into the time available BUT it is'nt what I'd call an exponential factor. (For example it amounts to around 4% loss of injection time between 6000rpm and 8000rpm)

Rpm is not a significant factor in determining injector size. If for example you max out a grey at 500bhp at 6000rpm at 35psi, if you lower the boost to lets say 28psi it will still max out at around 500bhp (just under at say around 490) but this time at 7000rpm. It's a very simple example but shows that bhp is the significant factor in injector size NOT rpm.

Anyway I've had enough of this, seems like I've come back off my hols to some people in a bad mood!