Two Step Rev Limiting a Blown Alcohol Engine
chart is intended to help you interpret the data from a RacePak data recorder.
showing timing stability and / or changes use calculated values. They
indicate when a timing change occurred and the duration of the timing
In some cases, when the data is downloaded into the P.C. and only the timing graphs appear incorrect, try downloading the information again. Sometimes the data is merely corrupted during a transfer and any traces using calculated values may appear abnormal.
If at any time you should lose the TDC indicator, all the timing graphs will be corrupted or lost.
Servicing Deutsch Connectors:
How to check connections and crimp qualities:
44 amp mags (Deutsch connector)
12 amp + 20 amp (Deutsch connectors)
Magnetic Pickup Connectors
Torque Spec for Cross Drive Nut
Torque Spec for cross drive nut = 20 ft/lb
Strange Looking Head Gaskets and Bearings
Note: If a Timing Retard PN 8168 is used, make sure that the points box case or cases are grounded to the retard box case. If this is not done, you may experience poor engine performance and "noisy" data traces on the RacePak display.
After any engine explosion, check the bottom drive woodruff key. In some cases when the engine stops suddenly the woodruff key can shear. The size of the key is engineered shear in such an event as not to cause other damage else where in the generator.
8101 Pro Mag Kill Switch
are times when an engine may drop a cylinder or cylinders for no apparent
reason. After researching this problem we found one answer, it could be
the spark plug. We discovered that porosity or inclusions in the porcelain
may allow the spark to travel through the porcelain directly to the metal
shell of the spark plug. Looking at the spark plug, it would appear that
the plug never fired. One can inspect the spark plug by cutting it apart
on a lathe. Machining the crimp off will allow the porcelain insulator
to be removed and inspected. Once removed, pin holes or burn marks can
be seen with the naked eye. If viewed with a microscope, the evidence
is quite clear.
If a battery is being used, a capacitor should be installed across the battery leads. The capacitor will store enough energy to run most timing accessories should vibration cause an open or short in the battery.