fitting 3SGTE CAS into 3T distributor

[CHB]

guys i am going to run COP on my 3T-C turbo. now i need to fit the CAS 24 tooth wheel into my 3T distributor. i have read thru one article posted by our member that fitting it into his 2TG or 3TG TA celica but i cannot find that post now.
any one have the link or the idea in the fitment?
thanks

[pheonix]

I would be interested in doing this as I wouldnt need to mess around with bolting something to the crank, but i cannot get hold of a CAS.

This is the page
http://users.chariot.net.au/~stmezz/cas.htm

[3jcelica]

Phenoix,

for wasted spark if that is what you are after then a crank wheel is far easier to set up. wheels can be had off the shelf that bolt on, and a ford crank sensor of an ef is easy to find and make a braket to suit rather than trying to butcher a dizzy together.

CHB,

Do you have wasted spark running? if not I would be inclined to go that way first and its dead easy to set up as above at works great. COP may be good if you want to adjust (advance/retard) the spark of each cylinder in which case you really need a wide band on each cylinder to tune properly and get the most out of it. If you do want COP I think the easiest way would be to keep your current dizzy (is it electronic with a vr sensor?) knock 3 of the vanes off keeping 1 vane for a home signal and bolting on a crank wheel and sensor rather than butchering the dizzy to fit a 24/2 wheel into it. Simon went to a lot of effort to make that dizzy up milling and lathing work involved I would expect it would cost $500+ to get some to do the work for you. Also does your current megasquirt except to VR sensor inputs because COP would require this also.

Roger

[thechuckster]

megasquirt is good with VR sensors - v3 does it out of the box and on the msextra forums, there's a guy who sells a mini expansion board with 2 VR interfaces on it.

If you did manage to get 3S guts into the dizzi, MXExtra knows how to decode the 24 and single-tooth triggers saving you the hassle of turning the 24 tooth wheel into a 12-1 trigger wheel.

[CHB]

how bout getting a CAS from AE92 4AGE or 4AGZE? would it be sufficient?

[3jcelica]

CHB,

Crank angle sensor will only get you wasted spark, you need a home signal for COP to tell the engine when it is on the firing stroke at TDC, hence the need for the two VR sensors. I don't think the 4age or 4agze had COP, but I could be wrong.

thechuckster,

I run v3 and the vr sensors work very well, but yes you will needs some mods to run 2 vr sensors nothing major, and there is a design out there for the v2 also. However I still don't think the hassel of going COP is worth it, to properly tune it will cost a lot and the gains will be minimal when compared to the cost. Try wasted spark, plenty of fun to be had and works very well.

Roger

[CHB]

well thanks for the inputs guys! i think i'll stick to waste spark for simplicity.

[Invid]

crank wheel is far easier to set up. wheels can be had off the shelf that bolt on,

Any idea where one of these off the shelf wheels can be found?

[CHB]

its can be purchase easily from Megasquirt dealer such as www.diyautotune.com
that where i bought my MS2 from.

[3jcelica]

Invid,

What CHB says is correct. Exactly where I got mine, I just had to increase the width of the slots slightly for 8mm bolts and made a bracket to suit the 3t and the ford ef vr sensor.

Roger

[CHB]

3jcelica,
how did you mount the wheel on the crank pulley? and also do you still run the 2 layers main pulley for air-con pump and water pump/alternator pump?

[3jcelica]

CHB,

On mine I bolted the front pully (never used it guessed it was for air con), this leaves 4 bolt holes on a PCD at 90 deg. I simply just bolted the crank wheel straight onto this, becaus you have all bolts on a PCD it centres it self. Dead easy with the pully I had, but may be different with the 3t (as opposed to 3tgteu) I will try and take some photos of the wheel and the sensor mount.


Roger