I removed the two teeth from my CAS today (1 VR circuit ignition, minimal borad mods) and just thought I'd share a few pics. If anyone is timid to do this me a shout, enough to cover shipping and a #2 at Burger King will suffice. (I accept paypal hahaha)


My procedure:
1. remove roll pin from gear.
2. remove gear
3. remove 2 bearing retainer screws in CAS body
4. remove shaft from housing
5. orient and clamp shaft in V-block (one tooth facing straight up)
6. 1/8 end mill and let the chips fly
7. assembly is reverse of of dissassembly

 

If anyone is thinking of doing this, take rxbeetle up on this. I was one of the first to experiment with the 12-1 concept and it is difficult to take these teeth off by Dremel as the teeth are very fine, the wheel is soft metal and it's real easy to dig a chunk out of an adjoining tooth. Thanks rxbeetle!

-Mike

 

uhh whats the point of this?

 

The point is that a lot of people opt to cut teeth from their CAS rather than building a second VR circuit, but may be afraid to mess up the CAS.

 

whats a second circut for?

 

The ecu counts teeth on the 24-tooth wheel using a VR sensor to determine eccentric shaft angle. The second 2-tooth wheel with its own VR sensor is used as a TDC reference to reset that counter. As the stock V3.0 MS has a built-in conditioning circuit for only one VR sensor, if the stock CAS is used then another conditioning circuit must be built. This extra circuit can be avoided by modifying the CAS as shown.

 

is the 2-tooth wheel permanently removed in this mod?

 

The 2-tooth wheel is not used. It could be pressed back onto the shaft, but serves no purpose.

 

Does it matter which teeth get removed? One on either side, yes, but how do you know which will be timed correctly with the e-shaft?

 

I left the 2 tooth on the shaft

 

Just remove two opposing teeth on the 24 tooth wheel. It does not matter which teeth you select as long as they are opposing. I personally removed a tooth 90 degrees from each of the teeth on the 2 tooth wheel. I used my Dremels extension with a diamond tipped bur. It was very simple to do but as stated earlier in this post it is very tight so be careful not to inflict to much damage on the teeth next to the ones being removed.