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12-05-2010, 12:29 PM #1
- Join Date
- Dec 2010
Vortec 6.0 Ideal Highway(60MPH) RPM
I've done alot of research and decided the 2002-03 Vortec 6.0L will be the perfect swap motor for a project 4X4 I'm building(that's not a point for debate). But I can't find much/any information on typical stock highway RPM figures from the factory. I need the data to figure my axle gear ratios. It'll be an AX15 overdrive transmission on 35's in a 4,000lbs Jeep. If I used 4.11 gears my 60MPH RPM will be 1900. Seems like that is to high for the big V-8 for street manners and gas mileage. But 3.73s my next choice down (dictated by the reverse cut dana 44 front) leaves me at 1700 RPM. I think this is closer to the 6.0's highway comfort zone but I would like more input from the field.
12-05-2010, 12:42 PM #2
- Join Date
- Feb 2008
- Cloquet, Minnesota, United States
- Blog Entries
1900 is about perfect... if you are doing 70 with an OD you are running about 2000-2100 with a stock truck.. so at 60 at 1900 you will be in the right range.. as long as you keep it under 2300-2400RPM it will still pull decent milage.Mike
1997 Chevy S-10 Blazer 4X4 with 330K miles and counting (Hunting rig).
2009 Saturn Aura XE (wifes car)
2011 F-150 Crew 4X4
"Hold it to the floor till you see God.... Then Brake!!!!"
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