RomRaider

I can't seem to find it but if I am right there was a parameter that could be written using SSM that affects timing.
If I am right it worked like "add/retard X timing".
Can some one point me to it?
thanks

google for ecuexplorer.exe
that can easily adjust the timing 5 deg from base as an overall value

looks like it's done by writing SSM address 6F
gotta check assembly, thanks a lot!

Have a look

viewtopic.php?f=25&t=6032&p=58839&hilit=0x6F#p58839

what's the story behind this ?
may I write this param and expect timing to change predictably ?
I got 16bit EU forester FYI.

viewtopic.php?f=7&t=5136&hilit=ignition+retard

Currently implemented for 32 bit ecu's. 0-10 degree ignition retard on the fly.
16 bit atmo Legacy is also tested.

I was thinking about timing advance as a means of dynamic tuning
Param 6F is in use in my rom already, not sure what it does right now tho.
will trace disassembly later if I'll have time to do that

Is this timing adjust command,0x6F ,timing retard applied across the board (all rpm, all Engine Load cells) ?
Can you help to list the full command usage example here..I would like to use the simple write box from Romraider logger to experiment this command..

I am living in a small country with good quality fuel(RON98) that neighbour country has much poorer quality fuel(inconsistent RON97),which will cause timing retard in 3 deg range when neighbouring country fuel is used.


With this command, it comes in handy..current solution is not pushing the tune to leave some buffer for unavoidable poorer fuel usage when in foreign land.

Prepair 3D ignition retard table. RPM and some kind of EngineLoad dependent. The last may be Engine Load (g\s), Intake Manifold Pressure, Throttle Position - anything you are comfortable with and your ecu is able to report.

The simplest starting table maybe a half value of Ignition Advance table.

Look at ssm.pdf for reference.


Read RPM and Engine Load by means of SingleRead command.
Interpolate applicable ignition retard value.
Write Ignition retard value (positive value corresponds to retard in degrees) by means of SingleWrite command.
Repeat this cycle while engine is running.

If this seems to be complicated just use ecuExplorer and adjust initial ignition retard (not applicable for idle).
Some ecu's (EJ152, EJ202 NA engine for example) reset initial retard value after ignition turned off.

http://code.google.com/p/ecuexplorer/downloads/list

are you writing a program to actively patch different load/engine rpm zone ?

yes, as an extension to my bluetooth-PDA project

I guess knock should also be observed and I am looking for a way of changing AFR live

Do you see any opportunity?
32 bit Denso ecu I am trying does not allow me to rewrite AirFuelLearning values yet.