[Chipboy]

I have a full file copy of a older ECU that was on a tuned motor, it gives me everything that the 2L variant of my 1.9 litre motor uses. Both engines have similar heads but mine is a wet sleeve 1.9L and the 2L a solid block.

Understanding injector size etc affects things can I use the VE map and adjust most things by 95% as applicable? Combining this with some base map things, is this a valid place to start, or start with a base map and move towards this example I have?

Many thanks.

[jonbill]

Sounds like a reasonable starting point to me: the standard speeduino base tune and your fuel map scaled to 95%.

[PSIG]

Agreed, the primary purpose of a base tune is to set applicable control settings for the hardware to function properly and mode (ECM internal calculations)most appropriate for the setup. For tables and multipliers, "close enough" to get it started and running is the primary goal.

Once warmed-up, the tuning begins from idle and working-up, to find the values that this engine needs with this fuel under these conditions. Typically, everything will change to a small or large degree, and what makes every engine tune unique.

[Chipboy]

Thank you both as I suspected and David yes I understand the personality each motor has and will treat it as unique in every way. One important thing differentiating it are the camshafts they are now overlapping which is distinctly different.

I suppose this is a suggestion of a target end point to move towards as a suggestion only.

[PSIG]

I suppose this is a suggestion of a target end point to move towards as a suggestion only.

All of my suggestions are... suggestions. While some may be very strong to avoid very bad things; you are free to do and act in any way you wish. That is one of the attractions to DIY-style EFI and ignition control... doing your thing.

[Chipboy]

Well I have always found your suggestions to be very good and you seem to know what you are talking about too, so I will follow them