Im going to the track on saturday and have some questions. Im going to use 100 HP shot with the NX system. Where do I have to gap my plugs? They are at .050 now. I plan on running the car a couple of passes without the NX, so will gapping them under .050 for these runs hurt my ET. Nx calls for no timing adjustments--is this safe? Also, what are you guys running for fuel pressure. I have the intank pump (with Mallory 3-port regulator) set up exclusively for the nitrous.Any suggestions. Mods in sig:

 

i'm gapping plugs at 40 and still playing. running the 150shot with 10 degrees base timing. I'm running 50 psi of fuel pressure.
If you think you may have problems run race gas.

 

I run 60 psi of fuel pressure on SVO #24 injectors and a Walbro 255 lph pump. Spark plug gap is .035 and a very cold spark plug. I'm at 6* base timing.

You may want to try 1.6 rockers on the exhaust to get more lift. Most nitrous cams have a longer duration and higher lift on the exhaust side as compared to the intake side.

 

I didnt have enough clearance for the 1.6 rockers. I have a 383 stroker. I am also running a carb...whats a good fuel pressure?

 

i'm running 383 and a high lift cam with 1.6 aluminum rockers and stock valve covers. and mine fit why won't yours ??????

 

The engine builder said there wasnt enough piston to valve clearance. e also said that the 1.5 roller rockers will work better for my setup. I dont know thats what he told me. As far as the valves I got heavy duty ferrea valves. The cam has a lift of .605in and .585ex.