As there are a lot of makes/types of engines, we do not have a library with ready-made curve files. However, you can create your own with this video tutorial. The curve can be from your car manual, a car forum or based on the curve table of a 123 Switch product on our website. Below the 123 Switch version, for example the 123\VW-4-R-V, you can find the curve table.

Hi Frank, The 123\Tune model works with USB and PC software, the 123\Tune+ is the Bluetooth version (no USB) and works with the app.

Many times, you can find the curve in the original manual of the vehicle. Also there are classic "how to repair/maintenance" books available which also contain information about the distributor and the timing with curves.

@@123ignitionchannel Thx, Iv'e been digging on the internet for quite some time and Im having a difficult time finding the exact curve. Seems like I'll have to improvise !

Hi, the 123 can measure from 0 kPa to 200kPa, wich is 0 bar to 2 bar absolute pressure. All points entered below 100kPa (1 bar) are advance points, all points above 1 bar are retard points.

Hi, you can just convert the curve as in the example like you are at sea level. After the conversion, you have the curve in absolute pressure. The nice thing is that the 123 measures absolute pressure.

@@123ignitionchannel Thanks

Hi! For 123ignition in Australia, please contact www.123ignition.com.au/

HI Benny, that is because the graphs are commonly given in distributor RPM and distributor advance (camshaft), while the 123 works with crankshaft RPM and crankshaft advance. This means that for the centrifugal curve, you need to multiply the RPM and advance values by 2. For the vacuum curve, you also need to multiply the advance by 2. See 1:26