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

[v6psi gem]

would this be the switch & resistor assembly?

[antus]

Yeah thats the one.

[v6psi gem]

thanx for your assistance, now to try it out

[antus]

Keep in mind $5D does not support boost, and the $5D '2 bar' tune thats getting around is an ugly calibration hack to a Normally Aspirated only operating system. You would be greatly better off running 12p and using its multiple map functions, even from eprom or eeprom.

[v6psi gem]

yeah, my user name is misleading for this project lol. the gem is using $12p with a nvram, this project is na. will the nvram support $5d to get the tune right using real time tuning before i program it to the 27c256? or do i have to just log it then re-program till i get what i need?

[antus]

No, $5D does not support realtime editing or high speed comms. You can only log $5D at 160 baud, and that will be a giant very slow pain in the ass lacking most the info you can expect from $12P. Why not tune on $12P instead - then you can use the nvram to tune and copy it to an eprom/eeprom when your done?

[v6psi gem]

maybe i'll just have to tune $12p & then build a replica $5d tune from that.

[antus]

Ahh I see. Yeah thats probably going to be your easiest option.

[v6psi gem]

was thinking some more could i have $5d on the low address and have $12p on the high address. so as without the switch it looks $5d but when switched will run $12p. obviously disconnecting battery to switch over. that way i can live tune it then just stack it on a $5d & program to a 27c512 so there is room

[Holden202T]

this wouldn't happen to be a in a street stocker ??? I don't know why they allow the ecotec but insist on having to run a vn/vp computer!