The tire pressure monitoring system does not seem very track-friendly… What happens if I run Hoosiers or R-Comp? it might turn on traction control for you!! and also might put your car in a power-reduced mode… WHOA! I guess even with reduced power u might still be able to go fast… (like a 20% reduction still gives u 400HP, LOL!)
The NEW Tire Pressure Monitoring System (TPMS) presents a whole list of problems:
(Note that the C5 TPMS wiring and programming were included on the C5 Z06 but not activated. However the C5 Tire Pressure Warning Sensors (TPWS) could be added to the C5 Z06 and then turned ON. Likewise it could be turned OFF for track use. The older TPMS ONLY functioned as a pressure Warning message.)
The New TPMS is more invasive and not only Warns the driver but activates Traction Control and a Reduced Power Mode.
– It is installed OEM on the car and NOT a delete option
– Currently the TPMS can NOT be turned OFF
– Currently the TPMS can NOT be reprogrammed
– The new TPMS is federally mandated on all cars by 2008. *
– The TPMS has a narrow range 28-38 psi.
– The TPMS MUST see 4 TPW sensors or it DeFaults to Traction Control ON and a Reduced Power Mode.
– The TPMS MUST see all 4 TPWS in range
– The TPMS MUST see ALL 4 TPWS in the correct position (LF/RF/RR/LR)
– The TPMS reads the TPWS above 20 MPH
– If an over pressure condition (+38 psi) is sensed the TPMS will alarm on the DIC
– If an underinflation condition (- 28 psi) is sensed the TPMS will alarm AND Default to TC ON and Reduced Power Mode
– A wheel without an emitting TPWS or in the wrong position is considered a 0 psi flat and causes the DeFault Mode
– Therefore ALL Race Wheels MUST have a NEW TPWS installed despite the narrow psi range.
– TPW sensors are $70 each, retail
– The TPW sensors are rotational dependant and produce a voltage and emit a readable frequency when spinning. The option to “fool” the TPMS by installing 4 in a pressure vessel in the rear of the car won’t work.
– The TPWS come in 2 different groups UJ9 and UH3 and must be matched according to VIN#
– The TPWS operate on 2 frequencies: 315 mHz, 433 mHz and possibly a third 309 mHz and have a 125 kHz activation/programming frequency.
– Each TPWS is unique and has a “rolling code”
– A new special programmer is necessary to initialize each TPWS to the TPMS as to frequency and position.($700 retail)
– Each time a wheel is installed on the car or wheels switch positions (wheel rotation/ wheel change/ wheel set change) it must be initialized with the programmer as to frequency AND position AND the rest of the wheels must be reprogrammed/verified as to position with the programmer.IN ORDER (LF/RF/RR/LR) This is a time consuming procedure performed at each wheel position.
