need help. aem v1 question.

[gsxr141]

hello all. just a quick aem question.
is there any way to feed the stock tach a signal from the aem so that the tach works?
i have sti coils installed, so everything under the hood that WOULD have sent the signal is gone.
thanks in advance......

 

[Funkycheeze]

You would need to piggyback a signal from one of the ignition outputs on the ECU that you are using. I don't think it has any other provision for tach output.

 

[toyotanos]

The AEM can output a tacho signal, but I never got it to work on my original 1991 Turbo Tacho. I bought an aftermarket (Autometer) unit that does the job pretty well.

 

[gsxr141]

thanks guys. i was trying to avoid getting a big tach. ugh.

 

[toyotanos]

So get a little one! Mine is a 3.5" one that's pretty close the the OEM tach in size. I too, didn't want the giganto-tacho so I got the lil guy.

 

[Funkycheeze]

Did some looking - the V1 does indeed have the ability to output a tacho signal on a low side output. You might need to fiddle with the settings and run it through a tach adapter box MSD 8920 to make it work properly with the factory instrument cluster.

 

[gsxr141]

thanks funkycheeze. i might end up wiring in a small aftermarket tach, seeing as my car now revs past what the stock tach reads.