help with tach questions? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1972hays · 07-27-2011, 03:19 AM

ok my friend and i are having a little feud he says there are different tachs for 6 cyl and for 8 cyl and he says theres one for diesel and also he says there are different rpm like a 50 a 60 and a 80 are these things true?

**GMCPaul** · 07-27-2011, 12:34 PM

Your friend is correct the 6cyl, 8cyl, & diesel all used a different tach and the RPM graduations were different from each other as the motors had different operating ranges and this caused the faces to change, its on the back of every OEM tach in light blue letters which motor its for 6CYL 8CYL or DIESEL
GMCPaul Jr

07-27-2011, 03:19 AM	#1
1972hays Registered User Join Date: Feb 2011 Location: A****er ca Posts: 475	help with tach questions? ok my friend and i are having a little feud he says there are different tachs for 6 cyl and for 8 cyl and he says theres one for diesel and also he says there are different rpm like a 50 a 60 and a 80 are these things true? __________________ 72 chevrolet 4wd 350/350 swb fleet green mean army machine

07-27-2011, 12:34 PM	#2
GMCPaul Senior Member Join Date: Mar 2000 Location: Rockville,In. USA Posts: 3,721	Re: help with tach questions? Your friend is correct the 6cyl, 8cyl, & diesel all used a different tach and the RPM graduations were different from each other as the motors had different operating ranges and this caused the faces to change, its on the back of every OEM tach in light blue letters which motor its for 6CYL 8CYL or DIESEL GMCPaul Jr __________________ Secure Online Catalog for-GMCPauls Truck Parts Email- GMCPAULS@GMAIL.COM



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