I suspect your tach is for an 8 cylinder engine. If it's getting 25% fewer impulses then the lower number makes more sense. At least this is my KY windage swag.


1953 Chevy 5-window 3100
In the Stovebolt Gallery
More pix on Picturetrail

Dave
Engine & Driveline Moderator

If you can't make seventy by an easy road, don't go. ~~ Mark Twain