Factory tach accuracy?
Thread Starter
Safety Car
Joined: Jan 2009
Posts: 3,736
Likes: 56
From: anchorage ak
Factory tach accuracy?
I recently goofed and trashed my factory tachometer, so I bought an auto meter digital tach with a shift light and peak rpm play back. Wasn't so keen on the digital aspect but the shift light and playback features are nice. The question is it seems like I wind a little higher to hit 6000 rpms and I've checked the tach with my timing light, which they were spot on with each other, so do you think the factory tach was off and if so by how much?
Burning Brakes
Joined: Dec 2003
Posts: 1,004
Likes: 7
From: Adelaide South Australia
I recently goofed and trashed my factory tachometer, so I bought an auto meter digital tach with a shift light and peak rpm play back. Wasn't so keen on the digital aspect but the shift light and playback features are nice. The question is it seems like I wind a little higher to hit 6000 rpms and I've checked the tach with my timing light, which they were spot on with each other, so do you think the factory tach was off and if so by how much?
When I checked my tacho for accuracy a few years back it was reading about 1000 rpm low... That solved the mystery as to why I was bending pushrods at only "5800" rpm.
I pulled out the dash and had the tacho and speedo overhauled and calibrated. Both are accurate now.
