How bad does a 2" lift effect fuel economy?

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jerrett
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How bad does a 2" lift effect fuel economy?

Post by jerrett » Mon Sep 17, 2012 9:17 pm

Anyone ever done any testing on this, or have any observations? Also curious on the impact on handling, not that it's great to begin with.. but does it make it a lot worse? :)

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Re: How bad does a 2" lift effect fuel economy?

Post by Kidhauler » Mon Sep 17, 2012 10:09 pm

I think the width and size of the tires would have more affect on the mileage than just the lift. I know that liftedawd is a big advocate for a set of 4.11 gears if you start putting bigger tires on to get the gearing ratio back to a stock level over all. As far as handling it shouldn't be affected to a noticable degree unless you put tires with a huge soft sidewall on then your going to notice.
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Re: How bad does a 2" lift effect fuel economy?

Post by LiftedAWDAstro » Tue Sep 18, 2012 6:35 pm

The biggest effect on fuel economy is the diameter and width of the tires. You lose overall gearing when going to a taller tire so you end up working the engine harder. A 2" lift and some 29" tall tires won't make much difference until you get into towing or have a lot of hilly terrain to drive on. I do recommend 4.10/4.11 gears especially when going to a 4-5" lift and run 31" tires.
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1995 Astro 2WD conversion 4.11 posi, shift kit, DHC rock rails - sold to Skippy
1998 Astro 4x4 D44, D60, NP231, full hydraulic system with 9k# Milemarker winch and snow plow - sold to Lockdoc
2003 Astro AWD all stock - traded for a 3/4 ton truck
2005 AWD, 4.10's - sold to skippy

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jerrett
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Re: How bad does a 2" lift effect fuel economy?

Post by jerrett » Fri Sep 21, 2012 5:52 pm

Good to know, thanks! I'm mostly concerned with snow-clearance... I'm going to be using the van for backcountry snowboarding access, which is often along unplowed logging roads where handfuls of trucks typically drive - it remains to be seen if the ruts caused by trucks will be too deep

I might give it a shot this winter without lifting first and see how it goes... my understanding is that the stock clearance on a 1999 AWD astro is 6.8", which is actually a little less than my old Subaru Forester (2001, 7.5") - hence my curiousity re: lifting :)

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