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#1 |
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IH8MUD Junior
Join Date: Sep 2004
Location: San Antonio, TX
Posts: 99
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I ssearched and did not find any info.
I knew that installing a lift on my LC was going to result in decreased MPG. I just don't understand why this is so. Nothing changes mechanically, other than a slight increased angle at the front differential (note: I have a diff drop) but I don't see this as being the culprit. I was already running 285s before the lift, so tire size is not the culprit either. I am left with aerodynamics, i.e more air allowed under the car and somehow increasing drag. But again, I fail to believe that this is the sole cause. Based the computer's calculated mileage, I dropped approx. 1.5 MPG for my daily driving pot lift. What do ya'll think? Or maybe someone knows and can expound this issue for me. __________________ '97 FZJ80 to '03 UZJ100 to (now) '05 UZJ100 Think I'm sticking with this one for awhile! Now with: HIRs OME 865s, OME t-bars, OME shocks, slee diff. drop |
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#2 |
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IH8MUD No-Lifer
Join Date: Dec 2003
Location: Bay Area, CA
Posts: 3,610
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Increased frontal area.
__________________ 98 LX470 85 BJ70 |
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#3 |
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IH8MUD Lifer
Join Date: Jun 2003
Location: Cuyamaca, CA and Las Vegas, NV
Posts: 2,460
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There is more wind resistance. Maybe if you lowered it your mileage would increase
Other than the decrease in mileage, do you like the results?Maybe 1loudlx can provide some feedback on that lowering thing? __________________ 2000 UZJ100 - OME - sold Currently looking for the right FJ60 TLCA #14734 Calamaridog
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#4 |
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...pig searching...
Join Date: Apr 2004
Location: Los Ángeles, CA.
Posts: 1,788
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correct
__________________ Looking for an FJ55. |
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#5 |
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IH8MUD Lifer
Join Date: Apr 2003
Location: Tucson, AZ
Posts: 2,249
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I also think it's mainly increased frontal surface area, which includes the front between the bumper and the ground. Best way to increase fuel economy would be to drive 55-60mph on cruise or lower the vehicle. Best way for the latter would be one of those JDM AHC controllers that allows one to drop/raise the front/rear independently of one another in 10mm increments. The new LX basically does this (drops the vehicle at highway speed by a fixed amount, the front drops more than the rear) to regain some lost mpg's due to the increased engine displacement.
__________________ '03 LX470: ART slotted & cryo'd rotors, Porterfield R4s pads, Stoptech stainless hoses, ARB sahara & Kaymar bars, HID's. '86 4Runner: lots of mods incl rear electric locker, front truetrac, regeared, OME lift, ARB/Kaymar bars. '01 Prelude SH: stock '00 Honda CRV: stock |
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#6 |
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IH8MUD Regular
Join Date: Apr 2005
Location: San Antonio, Texas
Posts: 275
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wait until the 35's go on it......
__________________ 2000 uzj100 1995 Fzj80 Pearl Gray mallcruiser with damage multipliers front and back tacos al cabron |
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#7 |
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IH8MUD Junior
Join Date: Sep 2004
Location: San Antonio, TX
Posts: 99
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Of course I like the results! Wouldn't go back (or lower) for anything, just curious. I have a 400 mile highway trip this afternoon, so I will able to see what the highway MPG is post lift. Probably end up cleaning the MAF.
__________________ '97 FZJ80 to '03 UZJ100 to (now) '05 UZJ100 Think I'm sticking with this one for awhile! Now with: HIRs OME 865s, OME t-bars, OME shocks, slee diff. drop |
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#8 | |
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Rollin’ on 33s...
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Quote:
![]() Though he did wheel last weekend which is more than you can say for me. ![]() __________________ 1981 FJ60 - Martha’s Vineyard - 209K, OME, BFG ATs, MAF header, hi-flo cat and Magnaflow, Surco Safari Rack, Rod Racks. 2002 UZJ100 - Brooklyn - 42K, OME 865, OME T-Bars, TJM T-15, TJM RB8, Slee Diff-Drop, Slee Tube Sliders, African Outback Roof Rack, Borla, Warn, IPF, PIAA, Toyo Open Country ATs. Gotham City Land Cruisers Yankee Toys Bay to Blue Ridge Cruisers |
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#9 | |
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IH8MUD Lifer
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Quote:
Plus increased frontal exposed surface area of all four tires. __________________ Derek Lee `63 Mercedes-Benz UNIMOG (404.115) `64 Mercedes-Benz UNIMOG (404.114) `81 Mercedes-Benz 300GD (460.333) `90 Mercedes-Benz 500SL (R129) `02 Saab 9-5 Aero `04 Toyota Land Cruiser (UZJ100) |
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#10 |
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IH8MUD Lifer
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35s.... roof rack.... bumpers...... I think when my own mods get done, I'll be riding a VESPA and letting the 100 sit for weekends
![]() __________________ 2004 UZJ100 "El Rinoceronte" - Gotta pay to play...
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#11 | |
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IH8MUD Addict
Join Date: Feb 2004
Location: Sandia Park, New Mexico
Posts: 858
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Quote:
~DMX __________________ I may be vile and pernicious But you can't look away I make you think I'm delicious With the stuff that I say I am the best you can get Have you guessed me yet? I am the slime oozin' out From your TV set" I'm The Slime by Frank Zappa, 1973 98 Land Cruiser 01 Beta trials bike 71 GMC Shortwide truck |
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#12 |
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IH8MUD No-Lifer
Join Date: Dec 2003
Location: Bay Area, CA
Posts: 3,610
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The LX570 also has a coefficient of drag of .35 vs .40 for the LX470. Not sure if that figure is with the auto lowering suspension activated though.
__________________ 98 LX470 85 BJ70 |
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#13 |
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Comfortably Numb
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The lift also causes more turbulence under the vehicle which adds to its drag.
I'm currently working on some easily removable attachments for the front of my rig that would help with on highway air flow; not sure if it'll do much good, but it can't hurt. __________________ 2005 UZJ100 OME T-Bars, OME 2 " 'Heavy' Lift Kit, Slee Diff Drop, ARB Combo Bumper, Warn XD9000, Slee Rear Bumper w/Tire Carrier, Slee Sliders |
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#14 |
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IH8MUD No-Lifer
Join Date: Dec 2003
Location: Bay Area, CA
Posts: 3,610
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Ah, a removable air dam. That would help fuel efficiency...
$11 worth of mods plus new tires - Car and Driver improves MPG by 25% : Ecomodder.com Fuel Economy Blog Skoolie.net • View topic - Aerodynamics / MPG increase - up 16% __________________ 98 LX470 85 BJ70 Last edited by hoser; 04-25-08 at 11:42 AM. |
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