I want to run nitrous. Need a way to control timing. Vehicle is already tuned. Stock 91 ECM with Ed wright tuned. Don't won't a separate prom and tune for it.

 

Use a NOS controller that controls the NOS flow
( ramps it up to 100% instead of dropping it all in at start like a off / on switch does ) ,
retards the timing and has rev limiter all in one unit

http://www.jacobselectronics.com.au/nitrous.htm

http://www.chevyhiperformance.com/te...xide_controls/

 

I think the Mallory 685 ignition box is the simplest, most economical way of controlling a single stage of nitrous. It will provide your selected spark retard when triggered by the nitrous circuit and has a built in window switch to avoid bringing the shot in at too low of rpm; can also use the top end of the window switch to cut the nitrous before each shift if you don't have a solid built auto.

Anything up to a 150 shot single stage, I wouldn't use a progressive controller. It's not needed if the rest of your car is set up correctly, and most solenoids are not designed to handle the pulsing.

 

Thanks guys

 

Anybody running the nos kit made specifically for the tuned port?