Nistune Forums

You can not look at a cell in an isolated way, it's always the relation between timing/fuel/load.

So when you move the mouse over a load cell in the timing map why
not display the corresponding A/F value from the timing map? (and vice-versa)

This way you won't have to switch windows so often or correlate between windows either.

What do you think? Should be easy to implement ..

No not really!

From factory the load scalers are different. There is no common index between fuel and timing maps so share this data. All cells are tied to their scalers (including VE maps on later model Nissans)

Example:
S13 CA18 column 7,8 fuel is 36 and 42 TP scalers and timing is 31 and 36 scales

You are better having both maps visible same time whilst viewing map cursor on both

Hi ... true, but then I need to outline that the delta compare function suffers from the same limitations.
(being across images)

Yes that is true. Normally one would get the scalers correct first and then compare between various tunes.

Yep, and most of the time I just assume that load scalers are in line also.
That's why I thought it would be 'easy' to implement my idea.

Also there should be some kind of context menu (via right mouse) on the cells anyhow.
(waste of possibilities)

Fuel or Timing load scalers are rarely in line.

Hello there,

Yes, you are correct .. (I checked some .bins)
So now I am wondering why this is the case.

So if you slam into the max load for fuel (say at 100) but ignition ends at 120.
What does actually happen?

I would guess that the ECU keeps the fuel level for 100+ but adjusts ignition further
according to the load-cells for ignition .

You certainly loose ignition resolution, but gain some control at >100 (where the fuel cells end)

Interesting concept ...


Still I think my idea about a lookup across tables is a nice feature

bachig24u wrote:Fuel or Timing load scalers are rarely in line.

yes,
ignition lead scales tend to be of less critical in nature, simply because timing scales can be quite low causing the ecu to lock at various rpm intersections in the map as soon as partially load is applied.

Fuel scales however can not.

In the days of mechanical distributors, race or circuit cars often (some still do) graph or lock timing to maximum for the whole rpm range just off idle, which is the equivalent of making the last timing column based on a mid load figure and only adjusting those values or setting them all the same.

It is useful if the engine is used in a small rpm band only and always.

Hello there,

So what you're saying is that ignition is less crtical than fuel?
But the maps I had a look at had a larger ignition scale compared to the fuel scaling.

I thought ignition timing is where you make the power?