V. efi tuning suggestions – BoonDocker YAMAHA: Nytro Turbo User Manual

Page 10

BoonDocker – 1585 Hollipark Dr. Idaho Falls, ID 83401 – 208-542-4411 / 877-522-7805

www.boondockers.com – email:

[email protected]

– fax: 208-524-7381

Revised 2-13-08

Page 10 of 20

3.c Stats: Boost Pressure

This menu displays boost pressure information.

PSI MAX Peak Clr

12.2 13.4 Y

MAX 12.2

Maximum fuel adjustment during last nitrous activation (blacked out

█

during nitrous

activation). This can be cleared manually and is always clear upon next nitrous activation.

This can be cleared manually and is always cleared upon next nitrous activation.

Peak 13.4

For systems without a N2O pressure regulator (NON in lower right-hand corner of Startup
Screen), this displays current nitrous tank pressure. For systems using a N2O pressure regulator
(ADJ or FIX in lower right-hand corner of Startup Screen), this shows the maximum nitrous
pressure during the shot, where the pressure is measured after the solenoid valve.

Selecting Y will clear these saved values. Use any arrow key to select Y or N. Pressing “SEL” takes you to the Main
Menu.

V. EFI Tuning Suggestions

Important: The Auxiliary Injector Test in Section II must successfully pass before running or tuning the sled!

Fuel requirements:

Race gas MUST be used, even for low boost! Detonation will quickly destroy your ingine! (See “Detonation” in
“Tuning Tips” below.)

Sunoco 112 is recommended and has been determined to be adequate for boost levels up to 14psi. VP fuel is not
recommended – it has been found to have lower motor octane than other comparable fuels. Other suggested
brands include Unical, Rockett Brand, F&L Racing Fuel, Pure Purple, and Trick racing gas. Always use fresh
fuel from a sealed barrel.

Spark Plug Gap:

Use new spark plugs and reduce the gap to 0.018” to 0.020”. Carry extra plugs – leaded fuel and boost is hard on
spark plugs.

Recommended Control Box Settings:

*** Please call Boondocker to receive the lates Fuel Setting information ***

The Control Box will not prevent a lean burn-down! You must take the proper tuning steps the same as if you
were tuning a carburetor.

Each Fuel adjustment setting goes from –99 to 127. Positive numbers add fuel and negative numbers subtract
fuel. This does not mean you have an effective range all the way to 127. You will max out the injector before this
setting is reached! Your usable adjustment range (max value) is dependent on how much the ECU is already
driving the injector, which will vary with load, RPM, temperature, elevation, and fuel pressure.

Boost controller:

It is recommended to start with the boost controller turned to the lowest boost setting. To find this starting point,
remove the boost controller, loosen the knob all the way, blow through it while tightening the knob until you start
to feel resistance (the valve stars to close off). Make sure the engine is tuned properly before increasing the boost
and watch closely for proper fuel mixture and detonation (see topics under “Tuning Tips).

Maximum recommended boost is 12psi at 5000’ altitude and 14psi if above 8000’.