Part Two: Well-Timed Sparks
When adding the nitrous system to our engine, we re-phased the distributor rotor so that it was closest to the contact terminal when the ignition was retarded for the nitrous oxide. When we hit the go button, the base timing of 30 degrees advanced will be retarded 12 degrees by the Digital 7 box. To ensure the rotor was not in between terminals when the nitrous was activated, we moved the Jesel belt-driven distributor rotor so that the rotor pointed at the number one terminal when the balancer read 18 degrees before top dead center, which is 12 degrees retarded.


Tech Tip
Determining Fuel Jet Sizing

Before flow-testing the fuel system, we needed to simulate the fuel flowing though the tiny orifices of the jets in the nitrous nozzles. This handy formula told us that with an .024 fuel jet in each nozzle, we needed a .067 flow jet for our flow tool.

Using a .0678 orifice flow jet, we're simulating the combined orifice of all eight jets in our system and can set the flowing fuel pressure pretty accurately with our tool.