[Diy_efi] coil per cylinder on a smallblock project

[Scott Pearson]

If all you want is the CNP feature of the LS1, use the Vortec sensors and a 
FAST eDIST. Like you said, the LS1 crank sensor is going to be a bit of a 
pain to put in a regular SBC.

What ECM are you running?

Scott

----- Original Message ----- 
From: "Robert Fleming" <robert.fleming at sbcglobal.net>


> I've posted this to the gmecm mailing list, but I'm statring to think that 
> maybe this is more of the diy-efi area...
>
> I've got a vortec 350 smallblock with an lt1 intake with 2002 ls1 gm 
> coilpacks, ecm, and harness that hopefully will all be running together 
> soon.
>
> I'm attempting to make this ecm control the engine but the only hold up is 
> the crank and cam position sensor.   For those of you unfamiliar with the 
> vortec crank sensor, it goes behind the timing chain cover and is a ring 
> with 4 teeth and the cam sensor has 2 teeth.  The ls1 has a 2 24 tooth 
> sheetmetal rings that are the opposite of each other (high on one side, 
> low on the other, picture at 
> http://www.gmgoodwrench.com/perfpartsjsp/partlist.jsp?cat=9283&section=ep 
> half way down the page.)    Now it looks like the actual sensors are the 
> same part so I am thinking I can machine a 24 tooth ring to fit under the 
> vortec timing cover to work with the ecm, but how would I now which half 
> of the stamped sheetmetal ring to copy?  Like I said earlier, one half is 
> basically the negative of the other so if I copy the wrong one it would be 
> off 10 degrees or so.    Same with the cam sensor, its 1 tooth on both the 
> ls1 and the vortec, but the ls1 has 2 rings 180 off.
>
> Thanks for any help, this is getting frustrating since this will be in a 
> desert race style truck with support bars all over the engine bay and 
> pulling the engine to tinker with sensors will not be the easiest thing to 
> do once its assembled.  The reason a ls1 block isn't used is because due 
> to extra height it will not fit with the suspension design and packaging 
> of the vehicle.
>
> -Robert
>
>


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