102 - Advanced Tuning Of A Delco ECM with $12P

General Tuning Questions And Discussions
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Re: 102 - Advanced Tuning Of A Delco ECM with $12P

Postby stevedarman » Sat Nov 30, 2013 4:55 pm

just wondering what frequency the flex table runs at ?
I am setting it up for variable steering that normally runs at 167 hz

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Re: 102 - Advanced Tuning Of A Delco ECM with $12P

Postby antus » Sat Nov 30, 2013 6:45 pm

32hz, details in the FAQ viewtopic.php?f=7&t=1396
Have you read the FAQ? For lots of information and links to significant threads see here: viewtopic.php?f=7&t=1396

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Re: 102 - Advanced Tuning Of A Delco ECM with $12P

Postby VL400 » Sat Nov 30, 2013 7:15 pm

It also shows you the freq and pin on the flex output setup screen in the flashtool.

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Re: 102 - Advanced Tuning Of A Delco ECM with $12P

Postby stevedarman » Mon Dec 02, 2013 6:05 pm

Great thanks a lot i found it
What are your thoughts on powering a speed sensitive steering solenoid at 32hz when it normally runs at 167 hz?
I would have thought the slower 32hz would be ok as it will still control current to the sloinoid

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Re: 102 - Advanced Tuning Of A Delco ECM with $12P

Postby VL400 » Mon Dec 02, 2013 9:24 pm

No idea on that one. With something like steering I would be very careful in going away from what the factory uses.

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Re: 102 - Advanced Tuning Of A Delco ECM with $12P

Postby stevedarman » Mon Dec 16, 2013 7:18 pm

The link to viewtopic.php?f=14&t=397 is not available.
Is the PWM Driver interface board still available?

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Re: 102 - Advanced Tuning Of A Delco ECM with $12P

Postby VL400 » Mon Dec 16, 2013 7:53 pm

No, the original ones are not available anymore. There will be a new version soon.

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Re: 102 - Advanced Tuning Of A Delco ECM with $12P

Postby v6psi gem » Sat Jun 28, 2014 4:53 pm

re: map switching. you mention that it requires $12p, but is it at all possible (or become) to switch between 2 $5d maps using an 808 without fitting a nvram?

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Re: 102 - Advanced Tuning Of A Delco ECM with $12P

Postby antus » Sat Jun 28, 2014 5:08 pm

There are 2 ways to do it. 12P has 2 copies of the tables you generally need to switch to change fueling, and you can install a switch on to one of the ecus digital pins to signal the OS to use the other maps.

The other way is the physical way which you'll have to build yourself. You can install a double size eprom or eeprom with 2 copies of tunes on it (one above the other) and add a switch on the high address line and resistor which pulls the signal high (Im not sure its high off the top of my head - someone correct me if im wrong). Then when you flick the switch it connects the line to ground. When doing it this way the ecm will see one half of the chip or the other which swaps the OS and all data in to the space the ecm is referencing. You should turn the engine off when doing this.
Have you read the FAQ? For lots of information and links to significant threads see here: viewtopic.php?f=7&t=1396

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Re: 102 - Advanced Tuning Of A Delco ECM with $12P

Postby v6psi gem » Sat Jun 28, 2014 10:26 pm

thanks, so option 1 means i have to run a $12p map no option?

And option 2 i have seen something about putting a resistor on the eprom just can't find it at the moment. if someone has a link to it could they post it up for me? So correct me if i'm wrong, i will need a 27c512 eprom (i think it is) out of a vr memcal & i will need to program it with 2 $5d maps. then use the switch & resistor to change maps?

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