I have solved my tach signal issues with the LSx coils

[Blackmagic94]

The MSD GMR will work but gets a lot of signal interference at high or fast RPM



SO this is what I am going to run now

http://www.dakotadigital.com/index.cfm/page/ptype=product/product_id=129/prd129.htm


Basically a pickup that counts teeth of the flywheel or flexplate and outputs a clean signal to the autometer or factory tach.  

[4Jenna]

Nice!

[Blacksaleen95]

Just to add to this,

The reason Blackmagic needs the converter is because he's using a crank/cam pickup that is not of the conventional 12 crank 1 cam pattern. Because of this he's unable to use the tacho output that is off the aem box.

Anyone with the EPM, will not have an issue driving a tach off of the ems.

[PQatPIT]

The reason Blackmagic needs the converter is because he's using a crank/cam pickup that is not of the conventional 12 crank 1 cam pattern. Because of this he's unable to use the tacho output that is off the aem box.

Hmm, what is this unconventional crank/cam setup?

[Blacksaleen95]

It's just a custom-built EPM-like setup that uses a different cam/crank pattern than the common epm pattern. 

[PQatPIT]

different cam/crank pattern than the common epm pattern.

I mean, how many teeth on crank and how many on cam?

[Blacksaleen95]

I believe it's 8 crank, 1 cam... brandon would have to verify that.

[PQatPIT]

I believe it's 8 crank, 1 cam... brandon would have to verify that.

See AEMPro User Guide v2.0, page 56. There one can see how to use an LS-output for tacho signal. Of course if any of LS3, 4, 7, 8, 9, 10, 11, 12 is free for or possible to use for this purpose.

If it is eight teeth on crank and one LS output is free then it is very much possible to use for tachometer.

[Blackmagic94]

8 tooth hall effect sensor crankshaft, 1 tooth cam setup.




I have LS7 and LS9 free, so what needs to be done to make this work?