Nitrous

[tpepmeie]

Originally Posted by Billy Mild

Can't you create 2 tunes with using the power key function? I would make it normal power would be Full timing, then when you click the key over to full power it would retard the timing.

No, because I presume you'd want to still have access to full power operation when off the bottle.

What I'd recommend is wire the window switch into an open input on the ECM and apply a spark retard when active. Alternatively, you could have the PT Open spark tables active when the window switch is closed (versus when the secondary bit is set). This becomes a lot easier if you don't have secondary throttles.

Note: the later calibrations have exactly this feature, although the tables are zeroed. The EBTCM sends a binary signal to the ECM, which then retards timing by a specified table amount. That was the secondary form of traction control (spark retard), the first being mechanical throttle modulation.