RRE's Apex Auto Timer Instructions
||Easy to use and great looking too. The
control/display head is about the size of a marking pen The
joystick control button allows easy navigation through all of the
different menus. The new timer can automatically determine the necessary
amount of after idling time by calculating how hard you have been
||A Manual Mode allows the user to preset desired idling
times from 0 sec.~10 minutes. By inputting O2 sensor voltage, the Timer
can also display theoretical air fuel ratio. The Timer can also display
critical data such as O2 sensor voltage and Battery Voltage. The
handbrake safety feature shuts off the vehicle when the handbrake is
released without the ignition key.
|| The small size makes the This allows a clean and
stylish installation virtually anywhere inside the car. Double sided
tape is all that is required, no drilling necessary.
|But I already have a turbo
Sell it. Buy this one :-)
|| Remote controller and relay box along with harness
Interpreting O2 Sensor Voltage Readings:
Every car is different when it comes to your tuning settings. The O2
sensors were never designed to be accurate to with in .1v For the most
part these numbers will help but you can not compare numbers as gospel
with someone else's. O2 sensor voltage decreases with increased heat. As
you make more and more consecutive tuning runs, the O2 sensor voltage
you see will decrease a bit even though your air/fuel ratio is remaining
At idle and part throttle you want to see the voltage cycling up and
down between .2 and .8 roughly.
Typically, your O2 voltage will cycle like this:
down, up and down, up and down........
When you go past 40% throttle the voltage will be set at what ever you
have the AFC set at. This is the same for full throttle.
2G 95-99 Turbo
On 91 octane gas you will want .94-.95v If you are at a higher altitude
then lower voltage is OK.
On 92 octane gas you will want .94v
On 93-94 octane gas you can get away with .92v
When the O2 sensor heats up after several runs, the voltage out put will
drop off a little. What was .94v will drop to .92v. This is normal.
1G 90-94 Turbo
The O2 voltage will vary a lot more from car to car. Your numbers can
vary from these easily by as much as .05v. 1G cars have more grounding
issues and 90s in particular will read leaner (lower voltage) With a 1G
car the compression is lower too so you can run leaner before getting
knock that retards timing.
On 91 octane gas you will want .89 to .91v If you are at a higher
altitude then lower voltage is OK.
On 92 octane gas you will want .88v
On 93-94 octane gas you can get away with .86v
The same applies to the O2 Voltage when the O2 sensor heats up, it will
Contact Road///Race Engineering
13022 La Dana Ct.
Santa Fe Springs, Ca. 90670
Tel (562) 777-1522 Fax (562) 777-1562
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last updated 7/02mw