The Dual Flash PCM
Dec 9, 2009 | 01:06 PM
#1
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From: Oakland, OR
The Dual Flash PCM
Hey guys, thought you might find this interesting. I've been thinking about buying one of these chips sets and putting it into a spare PCM I have here and giving it a try. If I setup COS5, I could potentially have 4 different tunes at the flip of 2 switch's. Let me know what you think.
BTW, I borrowed this post from Frost over on LS1Tech, Hope he doesn't mind
https://ls1tech.com/forums/nitrous-o...s-one-pcm.html
The Dual Flash PCM is an exciting advance in the Generation III tuning arsenal. We all know how incredibly capable these factory PCMs are at controlling all types of setups (with custom MAF, 1, 2, and 3 bar operating systems) and now with the ability to store and use TWO COMPELTELY separate calibration files that are chosen at the flip of a switch by the driver, they are stepping into territory that even standalone controllers do not tread through.
We open up good, tested, core PCMs and remove the surface-mount flash memory chip. It is replaced by a board header and a custom board (made by Digital Inflection Corporation) that has TWO flash chips already installed. The switching (or tune selection) is accomplished very easily. We assign an unused PCM pin to carry the switch circuit to the board. Included with the PCM is either a harness terminal or a preterminated wire that simply plugs into an un-used hole in the PCM's harness. If this wire is grounded, one calibration is selected. If the ground is opened up (floating), the PCM will boot with the second calibration loaded. The finished PCMs are thoroughly tested.
Outside boxes and 'trickery' for nitrous and boost tuning are a thing of the past. Their reliability pales in comparison to the proven technology of our PCMs, and we have made them better. Some obvious applications include:
Nitrous tuning:
Run a peak N/A tune and then switch over to your nitrous calibration. Run a single stage of nitrous on one calibration and two stages of nitrous with race fuel on the second flash. This is a very useful application because as many of you may already know, to keep cars shifting in the same place with added nitrous often includes lowering commanded shift points. These shift points now work with nitrous, but cause the car to shift too early N/A. There are many more possibilities and combinations.
Boost tuning:
Run a 'street' or pump-gas tune in one calibration, flip your switch and get a more aggessive AFR and spark map for use with race fuel. Turbo cars can use the switch to not only switch tunes, but to also switch MAP sensors. Run a safe 2bar tune with optimal VE resolution on pump gas; flip the switch and change over to a 3bar MAP sensor and tune for higher boost at the track. Again, the track (or "all-out") tune could contain a more aggressive timing and AFR schedule.
Economy tuning:
Use the second flash chip to switch to "economy mode" for fuel savings for trips or for alternate fuels such as E85!
Thanks.[/QUOTE]
BTW, I borrowed this post from Frost over on LS1Tech, Hope he doesn't mind
https://ls1tech.com/forums/nitrous-o...s-one-pcm.html
The Dual Flash PCM is an exciting advance in the Generation III tuning arsenal. We all know how incredibly capable these factory PCMs are at controlling all types of setups (with custom MAF, 1, 2, and 3 bar operating systems) and now with the ability to store and use TWO COMPELTELY separate calibration files that are chosen at the flip of a switch by the driver, they are stepping into territory that even standalone controllers do not tread through.
We open up good, tested, core PCMs and remove the surface-mount flash memory chip. It is replaced by a board header and a custom board (made by Digital Inflection Corporation) that has TWO flash chips already installed. The switching (or tune selection) is accomplished very easily. We assign an unused PCM pin to carry the switch circuit to the board. Included with the PCM is either a harness terminal or a preterminated wire that simply plugs into an un-used hole in the PCM's harness. If this wire is grounded, one calibration is selected. If the ground is opened up (floating), the PCM will boot with the second calibration loaded. The finished PCMs are thoroughly tested.
Outside boxes and 'trickery' for nitrous and boost tuning are a thing of the past. Their reliability pales in comparison to the proven technology of our PCMs, and we have made them better. Some obvious applications include:
Nitrous tuning:
Run a peak N/A tune and then switch over to your nitrous calibration. Run a single stage of nitrous on one calibration and two stages of nitrous with race fuel on the second flash. This is a very useful application because as many of you may already know, to keep cars shifting in the same place with added nitrous often includes lowering commanded shift points. These shift points now work with nitrous, but cause the car to shift too early N/A. There are many more possibilities and combinations.
Boost tuning:
Run a 'street' or pump-gas tune in one calibration, flip your switch and get a more aggessive AFR and spark map for use with race fuel. Turbo cars can use the switch to not only switch tunes, but to also switch MAP sensors. Run a safe 2bar tune with optimal VE resolution on pump gas; flip the switch and change over to a 3bar MAP sensor and tune for higher boost at the track. Again, the track (or "all-out") tune could contain a more aggressive timing and AFR schedule.
Economy tuning:
Use the second flash chip to switch to "economy mode" for fuel savings for trips or for alternate fuels such as E85!
Thanks.[/QUOTE]
Last edited by BlackGMC; Dec 15, 2009 at 06:03 PM.
Dec 9, 2009 | 01:10 PM
#2
Can these switches be flipped while the truck is running?? With this dual PCM or with standard COS5?
Or would you have to pull over, shut off the truck, flip switch, and restart the truck?
Or would you have to pull over, shut off the truck, flip switch, and restart the truck?
Dec 9, 2009 | 01:14 PM
#6
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From: Oakland, OR
It has to be switch with the truck off to go from one chip to the other. The COS5 switch can be switch on the fly. ANY OS can be loaded on to either chip, OEM or COS or any combination of the 2.
