Specifications

Points to look at:
• "The spacer makes no HP on the Dyno. It makes all of it's power in torque in the low end."
• "If you haven't noticed any power on the Dyno or the track then it's doing what it's supposed
to."
• "The idea of the spacer is to improve overall drivability and fuel mileage."
So...it doesn't make any more HP, is not supposed to help in 1/4 mile performance (or on the Dyno), and is
mainly for mileage and bottom end Torque. Well, Dyno's show TQ figures and there were no changes,
mileage stayed the same, and 1/4 mile performance wasn't affected on the several others who have tried it
(including us). They also are still not able to explain how the spacer keeps the swirl effect through the two
turns (90 degree and 45 degree) in the intake plenum of the Dodge Ram/Dakota/Durango manifolds.
While the Throttle Body Spacer showed no gains on the 3.9/5.2/5.9L Magnum engines, the 4.7L engines
have been reported to show noticeable gains from the spacer. Why? It's a much more efficient intake
system with less restrictions than the Magnum engines. It may work just fine for the 4.7L crowd but we'll
look into this at a later date for Dyno and long term MPG testing.
Which Thermostat temperature should I use?
The Magnum engines respond very well to a 180 degree thermostat. The factory thermo stat is a 195 degree
which is great for emissions but not so great for performance. Changing it out to a 180 degree model will
keep the engine slightly cooler which will help make more power. Please be aware that just swapping the
thermostat, without any other modifications, won't gain you a whole lot of extra power. All modifications
work together and most will complement each other. Example: 180 T'Stat used with a Cold Air Kit,
Headers, and a good Cat-Back system. The 180 degree thermostats will not affect your emissions output
either.
What Gap to set your Sparkplugs at:
This is a common question with an easy answer. Whatever the factory recommends for the stock ignition
system on your vehicle.
If you are running an aftermarket coil and/or ignition system (MSD, Accel, etc,), normally you can open
the gap up by .005" - .010" more than factory specifications. However, with Supercharging or Nitrous
applications, you would want to reduce the gap about .005" due to the higher cylinder pressures that occur
with both Superchargers and Nitrous. If you plan on using the Autolite 3923 sparkplugs in your Magnum
engine, stick with the same guidelines.