I have two 13B FCs, one was running with a Haltech ECU and broke an apex seal. I bought the second engine to use until I can repair the first.
I'm moving all the components from the first to the second. Now the dilemma. How can I get both engines into the same exact cycle so when I move the CAS from the first to the second engine, I won't have to reprogram and tune the engine.

 

Can you clarify? If it's using the stock CAS, you don't need to worry about anything other than the orientation in which you install it. There is no cycle. You may still need to adjust the tune to account for differences from engine to engine, but it will be very close.

First put the engine at the first timing mark on the pulley as rotated clockwise (from the front of the car). It is red from the factory. If the paint is gone, feel for the little notch. This is 5 degrees before TDC. It should be aligned with the pointer on the front cover.

On the CAS, you can see a small divot on the bottom drive gear. Align this with the pointer cast into the body of the CAS directly above it.

With the top cover of the CAS removed, you can see which tooth on the upper wheel ("cam" wheel, for lack of a better word) is aligned with the pickup.

While watching the wheel and pickup, install the CAS into the engine. It will want to move a little bit, but your goal is to make sure it doesn't move too much. It will always rotate a bit as the drive gear is helically cut, but if you allow it to rotate too far the drive gear will be a tooth out and won't allow you to adjust properly.

Once all the way seated, the CAS should be able to rotate in its slot so that the tooth on the wheel you noted earlier is aligned with the pickup. Put the CAS cover back on, and run the screws down but don't tighten yet. Put the lock nut on the CAS mounting ear, only finger-tight.

Then when you start and idle the car, lock the timing at 5 degrees before TDC (if referenced as degrees after TDC in software, use -5).

Use a timing light on wire L1 to check the timing against the main pulley mark, and it should align with the red mark mentioned earlier. If not, adjust the CAS by rotating it a bit as necessary until the mark aligns with the pointer on the front cover. Then tighten all fasteners.

EDIT: Oh, and remember to unlock the timing in your software before driving the car. And definitely DONT start auto-tune while having the timing locked, causing it to alter your entire VE table. Ask how I know...

 

WondrousBread
Thanks for the reply, I'm new to rotaries (obviously), tomorrow I will take your instructions to my engines and see if I can screw it up.
If I run into another mental block, I'll post it here,
John

 

No problem

Most of the engine (other than the block itself) is pretty similar to a piston engine. All the same principles apply, things are just in somewhat different places.