The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

glock35ipsc · 09-10-2010, 02:32 PM

I'm getting a consistent 18-19 in town, and 20-21 on the highway.

I run 3.42 gears and a 28" diameter tire. You would need about a 4.11 gear to turn the same RPM @ 75 mph.

09-10-2010, 02:32 PM	#2
glock35ipsc Next project: 1970 K10 Join Date: Feb 2004 Location: Fort Collins, Colo 80524 Posts: 6,685	Re: fuel mileage I'm getting a consistent 18-19 in town, and 20-21 on the highway. I run 3.42 gears and a 28" diameter tire. You would need about a 4.11 gear to turn the same RPM @ 75 mph. __________________ *Bob* 1970 Chevy K10 LWB "Goldie" 350/TH350 *next project!!* 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE Last edited by glock35ipsc; 09-10-2010 at 02:36 PM.