RPM signal wire

[darkhunter]

well i have an 05 srt-4 and i was wondering which wire is the RPM signal wire on the ECU, I looked on all data and got an ECU diagram but does not show the RPM signal wire at all, or if anyone has an after market RPM tachometer where do they get the Rpm signal from.

Thanks

[Sauce]

the srt 4 doesn't have an RPM/Tach signal, it uses MAP readings........i think you'll need a tach driver from MSD to convert the map signal to an RPM signal, i know that's how you do it when you install the APEXi SAFC II. The SAFC II and Neo need a tach signal in order to function, so you use the tach driver to convert the map sensor reading to a readable tach signal for the SAFC and the Neo.
i'm not 100% sure though........

[Turbo Eddie]

yeah u gotta use msd tach adaptor unless u get the raptor shiftlight