Spark plugs ?
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I think the factory gap on those plugs is about .030 which should be fine. I have used the -8, -9, and -10's in a variety of high boost applications and never re-gaped them, they are considered a "racing" plug and have a small gap from the factory. For the believers that non resistor plugs cause whatever problem it is they supposedly cause these are non resistor plugs beware 
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From: Huntsville, AL
Originally Posted by Ben-NSI,Dec 16 2008, 11:30 AM
For the believers that non resistor plugs cause whatever problem it is they supposedly cause these are non resistor plugs beware
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I honestly don't even know what a ULT is so i can't speak to that but I run non resistor plugs in my street car and race car with no problems what so ever and have been doing so for over a year... If the "ULT" is the e-manage ultimate (the only thing i can think of) then I'm not really surprised those things don't need any help causing problems (no offense). If your problem was indeed with an E-Manage it is most likely due to the fact that you did not add the diode's that Greddy conveniently forgot to put inline with the coil drivers.
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What happens is the ignition system pushes a signal back into the e-manage causing a variety of problems and depending on the type of ignition system implemented on the car can even burn up the coils. The diode insures that the signal wire is a 1 way road and eliminates all those issues. My guess is the resistor plug is band-aiding the problem by reducing the feedback in the wire.
you need to add a reversed 3.3V zener diode inline with each ignition signal wire this will reduce the trigger voltage to an appropriate level and eliminate the constant current flow that damages the coils over time. No idea why this was not done from the factory.
you need to add a reversed 3.3V zener diode inline with each ignition signal wire this will reduce the trigger voltage to an appropriate level and eliminate the constant current flow that damages the coils over time. No idea why this was not done from the factory.
