Quote Originally Posted by vortecyota View Post
Just thought of this, are you stating what rpm your gauge is showing or scan data? I'm guessing you're going by the gauge. If so, your tach out put parameter in the tune probably needs to be updated. I recently worked on an S10 with a 4.3-5.3 swap and at 2200rpm, the gauge indicated 3000. I played with the tach output parameters and got it within 100rpm at 3k.
I have thought of this also, but when I check my scanner rpm, it matches what my gauge is showing. So I didn't think it was off or that there was a problem...

But now I'm wondering do the readings I get on my scanner and my gauge come from the same "output parameter" or are they separate? I assumed they were seperate and the reading I see on the scanner is always "true" and the one from the gauge is what can be altered. And since they are equal, I figured the calibration was correct. Is this how it works?