Power FC The difference tuning base maps and injection maps??
05-09-02, 09:30 PM
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The difference tuning base maps and injection maps??
I'm just a bit confused with base vs Inj maps.. correct me if I'm wrong,, I understand base maps are stoich fuel settings for a stock engine (unless modified) in milliseconds..okay? So if I am tuning my car for all the mods I have, do I need to adjust the base maps at all, if so how do I know what's what?? Can I just adjust the injection maps only, and be fine? If I understand this correctly the BASE maps are only a BASIS for the fuel readings, a bottom line if you will..? Hope I didn't confuse anyone.. Thanks!
05-10-02, 08:02 AM
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You are getting the term base maps and how it is used confused.
The PFC has a fuel base map and other settings that require a DATALOGIT to change them. They can not be seen or changed with the commander.
Then there are the base maps that can be changed with the commander. These are the basic fuel and timing map sets that the PFC comes with from Japan or are preset for your use by the US dealer. This does not include maps from XS.
There are two base map sets: stock and mod.
The PFC has a fuel base map and other settings that require a DATALOGIT to change them. They can not be seen or changed with the commander.
Then there are the base maps that can be changed with the commander. These are the basic fuel and timing map sets that the PFC comes with from Japan or are preset for your use by the US dealer. This does not include maps from XS.
There are two base map sets: stock and mod.
Last edited by cewrx7r1; 05-10-02 at 12:44 PM.
05-10-02, 09:24 PM
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Sorry cewrx7r1, I guess I should have cleared that up.. I do have a Datalogit and also have a wideband plus a very modded engine.
The Datalogit manual says:
1-The base map represents the theoritical ideal mixture (14.57:1) for a stock motor. (unless changed)
2-Values are Injector pulse width in mil/sec
3-Tuning required for a modified engine (that's me) may exceed the range of the FUEL CORRECTION map. You might need to adjust the values in the Base Fuel Map.
If my PFC is adjusted and I have to change the injection map, is this in effect becoming my "Base Map"?
In the third statement, if I understand, if I exceed the injection map then I need to have the base map increased for allowances?
Why is the base map #'s in injector pulse width mil/sec instead of standard injection numbers?? Is there a formula for this?
Sorry for all the questions, just trying to learn all I can. Thanks!
The Datalogit manual says:
1-The base map represents the theoritical ideal mixture (14.57:1) for a stock motor. (unless changed)
2-Values are Injector pulse width in mil/sec
3-Tuning required for a modified engine (that's me) may exceed the range of the FUEL CORRECTION map. You might need to adjust the values in the Base Fuel Map.
If my PFC is adjusted and I have to change the injection map, is this in effect becoming my "Base Map"?
In the third statement, if I understand, if I exceed the injection map then I need to have the base map increased for allowances?
Why is the base map #'s in injector pulse width mil/sec instead of standard injection numbers?? Is there a formula for this?
Sorry for all the questions, just trying to learn all I can. Thanks!
05-10-02, 11:24 PM
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You are correct. The max value that can be entered into one of the commander editable cells is 149 which is 1.49n%. Then you can add more by the PIM maps.
If you have a very strong single turbo engine and was only using the cell values, they may be too small. You will notice that XS does a lot of changing with the real base map. It would become your new base map after you change it. Another reason they do it that way is to HIDE their maps. If they did it with the commander, you could easily copy it and give it to somene else. They are protecting their info.
The ecu function to control the injectors has to be in time, pulse width. So it has to convert the values to that somewhere. That is most likely why the base map are that way. Then the commander gives you 400 cells to easily tune/change that basemap. It is easier for the average person to make changes by percent then have to calculate and enter a new pulse width for each cell, or PIM map row. Think about that.
I do not know if it will be kept after doing the "INIT" process. Twokrx7 has played with that, ask him.
If you have a very strong single turbo engine and was only using the cell values, they may be too small. You will notice that XS does a lot of changing with the real base map. It would become your new base map after you change it. Another reason they do it that way is to HIDE their maps. If they did it with the commander, you could easily copy it and give it to somene else. They are protecting their info.
The ecu function to control the injectors has to be in time, pulse width. So it has to convert the values to that somewhere. That is most likely why the base map are that way. Then the commander gives you 400 cells to easily tune/change that basemap. It is easier for the average person to make changes by percent then have to calculate and enter a new pulse width for each cell, or PIM map row. Think about that.
I do not know if it will be kept after doing the "INIT" process. Twokrx7 has played with that, ask him.
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