Unused input found on LNF ECM
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From: Seattle, WA
Unused input found on LNF ECM
It turns out there's a pin that is not used in the Cobalt SSTC ECM but there is software support in the ECM for it.
We've used unused pins in the past to implement dynamically switchable tune features - like on a NOS build we used it for an arming switch and used an unused output to kick on the NOS solenoid under proper conditions. At the same time we swapped in an alternate fuel and timing table so the vehicle would perform optimally on the bottle vs. off the bottle.
We don't have any usable outputs (yet) but this input could be used for a variety of things. For example, people who are spraying water/methanol injection systems could apply a signal to this input and we could swap in an alternate timing table.
So, this thread is to hear all those great ideas out there! What would people like to use this for?
We've used unused pins in the past to implement dynamically switchable tune features - like on a NOS build we used it for an arming switch and used an unused output to kick on the NOS solenoid under proper conditions. At the same time we swapped in an alternate fuel and timing table so the vehicle would perform optimally on the bottle vs. off the bottle.
We don't have any usable outputs (yet) but this input could be used for a variety of things. For example, people who are spraying water/methanol injection systems could apply a signal to this input and we could swap in an alternate timing table.
So, this thread is to hear all those great ideas out there! What would people like to use this for?
Could this pin be used to command a totally different tune? I.E. using the AEM Truboost gauge and using the 2 settings it offers. Like, run stock psi/tune to putz around town and then run a high psi/tune for track days?
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From: Seattle, WA
Yes, although we already offer that through the traction control selection or cruise control selection. But, sure, we could add that input as a trigger method very, very easily.
Well, I'm assuming that if you had a WOT switch on your car to trip your nitrous anyway, you could keep that to trigger your nitrous solenoid, and also have it go to this unused pin on the ecm, where it would switch to the nitrous fueling and spark tables? or are there limitations to the speed it can be switched between the tables?
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Well, I'm assuming that if you had a WOT switch on your car to trip your nitrous anyway, you could keep that to trigger your nitrous solenoid, and also have it go to this unused pin on the ecm, where it would switch to the nitrous fueling and spark tables? or are there limitations to the speed it can be switched between the tables?
There are so many possibilities with this...hows come you're the one that keeps finding all the fun stuff for the LNF computers? First it was unlocking the fuel tables and now it's this unused pin....what's next? lol
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Joined: 04-09-08
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How about driver-adjustable launch control RPM setting? ;-) Maybe you could use the cruise control buttons to set your launch RPM at engine startup.
wait....wait....still don't have the TC yet. I need a bib, you're causing my salivary glands to go into overdrive
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How about an inbetween tune Vince? Inbetween stock and full 22-23psi...say 19psi for those days when the finecky clutch is having a hard time holding on...
I vote you get launch contol to build boost!!!!!
Then you can make this new found magical area of the ecu an adjustable L/C area where you can adjust the rpm you launch off of depending on how much you smoke you wanna see!!!
Then you can make this new found magical area of the ecu an adjustable L/C area where you can adjust the rpm you launch off of depending on how much you smoke you wanna see!!!
yea i asked about three tunes available before.
i thought it was like this.
esc on no cruise = stock tune
esc on and cruise on = more boost
esc off = insane boost
something like that would be awesome
thats what i'd prefer
but i also like the idea of choosing rpm
yea i asked about three tunes available before.
i thought it was like this.
esc on no cruise = stock tune
esc on and cruise on = more boost
esc off = insane boost
something like that would be awesome
thats what i'd prefer
but i also like the idea of choosing rpm
i thought it was like this.
esc on no cruise = stock tune
esc on and cruise on = more boost
esc off = insane boost
something like that would be awesome
thats what i'd prefer
but i also like the idea of choosing rpm
lol it still works.
just press resume or set
mines set to be active on cruise off = 24 psi cruise on = 18
the other thing you mentioned would be cool, but I really don't have a need for 3 settings, just 2. I want to be able to run "stock" boost all the time and then crank it up when I wanna have fun. I'd want the stock boost pressure, but a better tune over stock.
I was referring to this^^
the other thing you mentioned would be cool, but I really don't have a need for 3 settings, just 2. I want to be able to run "stock" boost all the time and then crank it up when I wanna have fun. I'd want the stock boost pressure, but a better tune over stock.
the other thing you mentioned would be cool, but I really don't have a need for 3 settings, just 2. I want to be able to run "stock" boost all the time and then crank it up when I wanna have fun. I'd want the stock boost pressure, but a better tune over stock.
the ecm adjusts depending on temp and elevation
to limit you at 260 hp regardless if that means adding more boost or taking away.
so i'm not sure how vince would tune that.
here in austin, when i was stock last week i pulled 15 psi.