Ignition box retard with RPM

built in nitrous retard....

"Most nitrous companies suggest retarding timing by 1.5-2.5 degrees per 50 hp of nitrous use. For example, a 200hp nitrous tune would require the timing to be retarded from 6 to 10 degrees. "

So the 690 box is good for a 100hp shot...stock. :lol:

could you advance your timing +4 and use a retard box at lower RPM's to compensate for the upper RPM lag?