Nitrous

[Hib Halverson]

Originally Posted by tpepmeie

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.

Ah...good old Todd...always thinkin'

For almost as long as I've owned a ZR-1 I've always wondered why the LT5 TCS never used spark retard. The system was designed to be three steps.

1) Spark retard
2) TPS reduction
3) rear brake intervention at lower speeds only.

As Todd says, all the LT5 cals had that table zeroed.

It'd be pretty easy to use the shifter gun switch or whatever else you use for nitrous enable to control a relay whch would in turn switch a 5V signal to the ECM in place of the signal from the EBTCM.

Then you could just put, say...a 5° retard value in the the TCS table in the cal.

Lastly, on nitrous oxide rigs for LT5, while NOS may no longer sell the LT5 stuff, the guys who originally designed that system are back in business under a different name, Nitrous Supply. It's owned by Corvette nut and the founder of the original Nitrous Oxide Systems, Mike Thermos. 714-373-1986 is the ph. there.