New to Nitrous: Need advice
For 75HP and at least 89 octane fuel , you do not have to change spark plugs or timing.
For 150HP you need to change the spark plugs to copper core (non platinum) plugs, gapped at .035. We recommend an NGK TR6 spark plug. Factory timing is ok as long as you run 93 octane fuel.
Thanks for all your advice guys
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One place I disagree with is changing the spark plugs. I suggest changing them period. Timming will depend on what is done to your car now.
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The best options available that pull timing in a reliable method are the following.
Timing tunner- This unit features activation delay, timing retard, and activation controls based on RPM (programmable window switch) for nitrous oxide systems
MSD Timing Twister-Advance the ignition timing up to 9 degrees. Select a step retard up to 18 degrees for nitrous use. Twist in a boost retard from .1 to 1.9 degrees per pound of boost.
Lingerfelter-LNC-002 can be used to provide consistent launch rpm off the line in drag racing and standing start road racing applications.
The LNC-002 can also be used as an adjustable individual cylinder rpm limiter, providing reliable and fast acting spark based engine rpm limit control.
With the Timing Retard function, the LNC-002 can now also be used to retard timing by up to 15 degrees.
The LNC-002 is designed for use on all GM LS series engine applications LS1, LS6, LS2, LS3, LS7, LQ4 and other Gen III and IV GM V8 applications



