Specifications

midgrade at 89 (R+M)/2, and premium at 93 (R+M)/2. In high-altitude areas such as the Rocky Mountain
Region of the U.S., the (R+M)/2 number may be lower by one or two numbers. After January 1, 1996, no
leaded gasoline may be sold for highway use.
Q. Which octane grade should I use in my car?
A. Use the recommendation in your car owner's manual as a starting point for selecting the proper gasoline.
If you notice engine knock over an extended time and your engine is adjusted correctly, try a higher octane
gasoline. Also, higher octane may provide a performance benefit (better acceleration) in cars equipped with
knock sensors. Many late model and high-performance (turbo-charged and supercharged) cars fall into this
category.
How to bypass the speed limiter ('97-'02 models)
While this is not recommended by any means, there have been some folks interested in bypassing the speed
limiter. We are working on the circuitry for this...but in the mean time, you can bypass it by turning your
key to the START position and holding it there. On '98+ models, this will turn your speedometer off but
will keep the rest of the gauges operational. (Do NOT do this at high speeds or extended periods as you
really need both hands on the steering wheel and we haven't tested it on prolonged periods of time.)
How to read your Dyno run files
If you had some Dyno work, or just some HP/TQ readings done on a Dyno, you can ask the Dyno operator
to save your file to a floppy disk. Once you get home, you can view them with the DynoJet "RunViewer".
You can download them from this link: DynoJet RunViewer. This applies only to the DynoJet dynometers.
Factory Intake Manifold Modifications
You'll need to remove the intake manifold for this as well as removing the plenum plate - aka: belly pan.
(1) If you are one of the unlucky people who received a factory manifold with the plenum divider that runs
all the way to the bottom, remove the intake and cut it back by no more than 2". If you don't have the full-
length divider, go to step 2
(2) Remove all casting flash from the runners and port edges.
(3) Radius all edges on the runners
(4) Radius the injector bosses on the head mating surface of the manifold
(5) Radius the edges of the throttle body bores (45 degree angle)
(6) Install an APS Billet Aluminum Plenum Plate Kit (available through our website)
(7) Replace the injectors with a set of Ford Motorsports 19# High Flow (optional step)
** 2000+ models use RED Colored 21# injectors (factory) - Do NOT downgrade the injectors to the Design-III FMS 19# **
Those will help bring out the lower to mid RPM band power and smoothness. The billet aluminum pan will
also fix that annoying "belly pan leak" problem.
While the factory manifold can be modified even more by cutting the runners and filling the plenum, save
your money on those two steps and buy an M1-2BBL MPI Manifold.