Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post

Galane · 02-13-2015, 04:58 PM

Anyone ever done a same vehicle comparison between LT235/85R16 tires, LRR and not LRR?

I'm updating a 1982 GMC 1 ton dually flatbed with 1991 TBI 350 V8 and 700R4. Will turn that 4.56 final ratio into a 3.something in OD. Most likely will have the ECM programmed to enable highway cruise mode.

My goal is to squeeze as much MPG as possible out for one way on trips to deliver or pick up machine tools and other heavy stuff to offset the lousy MPG it will get not using OD much o the time with a heavy load.

02-13-2015, 04:58 PM	#1 (permalink)
Galane Master EcoModder Join Date: Jul 2009 Location: idaho Posts: 282 Thanks: 0 Thanked 96 Times in 74 Posts	LRR truck tire comparo? Anyone ever done a same vehicle comparison between LT235/85R16 tires, LRR and not LRR? I'm updating a 1982 GMC 1 ton dually flatbed with 1991 TBI 350 V8 and 700R4. Will turn that 4.56 final ratio into a 3.something in OD. Most likely will have the ECM programmed to enable highway cruise mode. My goal is to squeeze as much MPG as possible out for one way on trips to deliver or pick up machine tools and other heavy stuff to offset the lousy MPG it will get not using OD much o the time with a heavy load.