Aqua94vette

I have been running a 100 shot of n20 for alonf time now without having to retard the timing but I am ready to jump it up to a 125 shot will I need to retard the timing if so how do I do it?

ANTI VENOM

I use a Nitrous Mastermind, but if you have an aftermarket ignition, you could use a timing retard box triggered off your actuation switch maybe.

REDC4CORVETTE

I used a 3 stage retard box from msd for a while but I did not trust it.

Try an Lt4 knock sensor cheap
I switched to a **** retard that I retard from inside the car 4 degrees using a 125 shot ,Your big problem will be the rear end not holding up so watch it.
I changed the regulator to an aeromotive at 40 psi and turn on the juice just about 3/4 of the way through 1st gear.
at 42.5 psi and 1000 psi bottle temp the car runs low 11s but you will break alot of parts.
keep fuel presure at 40.
I have 315/17 nitto drag radials at 17 lbs.