So I have been having some issues getting the car timed correctly since installing the S5 turbo engine in the 10th AE. After some digging I realized that I installed a S4 T2 pulley on the S5 Eshaft and decided the only way to correct the timing would be to purchase a Racing beat pulley and perform the following steps to mark my S4 Pulley.

1) Install the Racing beat Pulley and set the car to 0degTDC
2) Remove the Racing beat pulley and install the S4 T2 pulley
3) Mark the S4 turbo pulley for 0deg TDC
4) Remove S4 T2 pulley
5) Install Racing Beat pulley and set the car to 10degAtDC
6) Remove Racing Beat Pulley
7) Install S4 T2 pulley and mark 10deg AtDC

I need to verify that by performing these steps I will have set the car to the correct OEM timing.. My plan would be as follows to set the timing of the car once the CAS is stabbed to the correct location.

1) Set pulley to 10degAtdc (left most mark on the pulley) by turning the Eshaft
2) Start the car and use the timing light on the Leading coil to set the light and marker to the right most mark (0degTDC)

Hopefully this will solve my high idle/hard start issue.. Please chime in if you feel that this method may not be correct.

Thanks

 

You have not set the timing to OEM. HOWEVER, you are not in trouble.
Leading is 5 ADTC, and trailing is 20 ATDC. Lucky for all of us, the pulley is 360MM around. So you can measure 1 MM for every degree you need on the pulley, and you can make new marks and color them (yellow leading, red trailing).

 

yeah i think you're right, if the RB marks are -10, 0 +10 and +20, then you can set the leading in between the -10, and zero, and that should be the -5 that is the leading mark on the mazda pulley.

you actually can put the RB pulley in, turn the engine by hand, and then put the mazda pulley on.

since the pulley is off, you can also make sure the keyway on the E shaft is @9 oclock, or facing the passenger side of the car.