3 speed RPM question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

03BlkZ · 12-21-2021, 08:47 AM

Hello, I finished my resto on my 70 C10 about 10 months ago and now I have a question about RPM. My truck didn't have a factory tach and I didn't add one during the resto but now I wish I would have. My truck is a 350 with 3 on the tree and 3.73 gears. I am running a 255/70/15 tire. When going 60 to 70 mph it sounds like I am running a pretty high RPM. Anyone here have a tach with the same setup as me that can tell me what RPMs you are running?
Thanks

12-21-2021, 08:47 AM	#1
03BlkZ Registered User Join Date: Nov 2015 Location: Hewitt, Tx Posts: 386	3 speed RPM question Hello, I finished my resto on my 70 C10 about 10 months ago and now I have a question about RPM. My truck didn't have a factory tach and I didn't add one during the resto but now I wish I would have. My truck is a 350 with 3 on the tree and 3.73 gears. I am running a 255/70/15 tire. When going 60 to 70 mph it sounds like I am running a pretty high RPM. Anyone here have a tach with the same setup as me that can tell me what RPMs you are running? Thanks



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