This is a tool made specifically for all wankel rotary engines made by Mazda.
It can measure the compression on every face of a rotor, display it in BAR/PSI/KPA, then measure the cranking speed of your starter and the atmospheric pressure.
All this information is used to compensate for RPM and altitude, and gives you an equivalent result as if your test was taken at 250RPM and at sea level; this is how Mazda says it should be done. It takes into account how weak your car battery is, how worn the starter is, ensuring you get the most accurate result.
Using this device is no harder than taking the driver side wheel off, removing 2 spark plugs and inserting a sensor in each hole while spining the engine over. The whole test takes about 10 minutes out of which 3 are for removing the wheel, 5 for the spark plugs, and 2 for the actual testing.
New! Now you can buy a version with 2 pressure sensors - and it will do both of your rotors during one engine cranking test!
There is also a version with 3 pressure sensors if you are lucky enough to own a 3-rotor 20B engine.
The classical 1 sensor version is still available as usual - and the newer models have all the features of the old one. But since most rotary engines have 2 rotors, it makes sense to have 2 sensors that measure at the same time instead of testing one, then moving the sensor to the other rotor and repeating the test.
The cable length is adjustable - so that you can confortably sit with the tester in your hand, inside the car, while cranking over the engine. You can use this tester by yourself with no extra help. This is true for both LHD and RHD cars - 2 or 4 meters of wire is plenty enough.
Please note that you can use the 2 meter length version just as well on RHD cars - but the wire will be a bit short, and you won't see the tester while cranking the engine. That is why I offer a 4 meter long sensor wire - to keep the tester in your hand even in RHD cars.
It is of great help to a prospective buyer or seller alike - everyone wants to know what they are buying.
The tool has no limit as to how much it can be used - though it has a 9V battery inside which will need replacing sometime. You should get at least 100 tests done on a battery - which should be a lifetime's worth for most people.
The new 2 sensor vesion looks like this:
After the test is done, cranking RPM and raw results(not corrected) are shown. Then corrected results(that account for RPM and altitude above sea level) are shown.
Units of measurement are in BAR, PSI, KPA for both rotors.
And if you have a 20B... then this is the tool made JUST for this engine alone!
Doing all three rotors at one time, it will show:
- engine cranking RPM(from 120 to 350 RPM is the acceptable range)
- uncorrected pressure results in BAR, PSI and KPA for each rotor and each rotor face(total of 9 readings);
- results corrected for RPM and altitude in BAR, PSI and KPA for each rotor and each rotor face;
- what sensors you have plugged in, so that you plug sensor 1 into rotor 1, sensor 2 in rotor 2 and sensor 3 in rotor 3;
And if you own a 20B and other 2-rotor rotaries, the tool will work on 2 rotor engines as well(leave sensor 3 unplugged).
