Re-scaling load in fuel and ignition maps.......

Developer topics relating to software that provides a tuning UI to alter ECU code and data

Moderator: Freon

Postby west_minist » Sun Oct 22, 2006 6:06 pm

Nope. Once all the pointer are right or however the programmers does it, no.

But room must be made. I am not a programmer, so those with skills can better reply to you.
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Postby Freon » Sun Oct 22, 2006 6:12 pm

At least on the DBW ECU, it wouldn't be that hard, but you'd need a tool to automate it to keep it from taking hours and reduce the chance of error.

You need to shuffle the maps a bit. There is room. The map configuration allows you to just change the map definition line to do this.

I still don't think it is that important to do.
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Postby ride5000 » Mon Oct 23, 2006 5:17 am

westminst, i think you're overstating the need for additional resolution. in the higher load areas there is no reason to require such fine granularity IF the map is properly constructed.

jm2c
ken
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Postby Freon » Mon Oct 23, 2006 11:42 am

Also keep in mind the ECU does a bilinear sample on the 3D maps, and a linear interpolation on 2D maps. It isn't a step on the map. Basically it does a weighted average of the four closest samples.

So if your timing drops like a rock at 2600-4000rpm at about the 1.5 load level, your timing does not actually suddenly drop 5 degrees. It smoothly falls down the slope between the load and RPM columns.
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Postby dynowog » Sun Mar 04, 2007 12:07 am

just learning here

if i wanted to run 30-40 psi boost

how far would the maf allow me to go?

all i could rescale to was 8 what power/boost would thei realate too?

is it as simple as making a new larger dia. afm body and fitting the sensor to that?

i do a lot of high power wrx's but all have been stand alones fitted how far can you take the std system?

thanks
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