Cheers ! :thumbup:

Thats all I wanted to know at this point - that this was something tuners were taking into consideration whilst developing maps.

You are also right: I have not ran any maps on my car with the timing retarded as I thought there must be a reason why no tuners are doing this and you have explained that, so thanks!

At the moment my car just runs a map with 2 or 3 more IQ across some of the rev range to give a smoother delivery, standard RP and with the timing advanced a degree at medium requsts and a couple of degrees at higher requests. It works well, nice to drive, nothing special... that was just more of an FYI really :)

;)

So if EOI was at 0 degrees @ 1600 bar.
If you then increased that rail pressure to 1800bar you would make the SOI earlier ???

I thought the idea would be to keep EOI at 0 degrees.
So SOI would have to be later as you'd inject the required fuel in less time.
Inject too early you start losing power as you are driving the piston in reverse.

But yes I agree thats not the way to do it.
As that completely screws up the fuel calibration.
You should be adding new calibrated IQ columns to inject more fuel as you said.
And the SOI of those new columns shoudl be earlier.

Sorry but what does it mean EOI :mrgreen:

Maybe End Of Injection?

Yes. ;)