LSx Tach output? 4Cyl or 8?
 

I cant remember what it is and am putting a tach in soon.

Re: LSx Tach output? 4Cyl or 8?
 

I used the 4cyl configuration on my tach.

Re: LSx Tach output? 4Cyl or 8?
 

yours is wired right from the PCM?

Re: LSx Tach output? 4Cyl or 8?
 

Yup. Speartech reworked the harness for me. I recall reading on a forum, it may be necessary to add a take up resistor. I did not and everything works correctly.

Re: LSx Tach output? 4Cyl or 8?
 

It can be changed in your tune, so a call to your tunner may be in order. If it dosent work, TR65's resistor pull up thread is in the FAQ.

Re: LSx Tach output? 4Cyl or 8?
 

Thanks guys!

Re: LSx Tach output? 4Cyl or 8?
 

If you're using a factory tach that is not adjustable for 4, 6, or 8 cylinder applications, then you'll need to have the 'tach resolution' changed in the tune from 6 to 3. (for an 8 cylinder tach) If you're using an adjustable aftermarket tach, then just set it for 4 cylinder.

Re: LSx Tach output? 4Cyl or 8?
 

Ok, Cool, Thanks Ls1nova71.