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05-21-08, 06:53 AM
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#1 |
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Disciple
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How to improve gas mileage?
I have a '75 FJ40 with 2F engine, Holley, and 3.70 gears. Is there anything that can be done to improve highway mileage? I use my 40 primarily as a light trail, fishing machine. Not worried about heavy duty stuff. I'm open to any ideas. I'm afraid I will sell it if I don't find a way to save gas.
__________________  '75 fj40 james.grier@aero.bombardier.comSolid Rock Off-Road Sliders TLCA # 16681 Alamo City Land Cruisers He died on the cross for you and I.
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05-21-08, 06:55 AM
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#2 |
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IH8MUD Lifer
Join Date: Aug 2005
Location: Gresham Or.
Posts: 1,200
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Cruisers are not economical at all. If that's what you are after, then sell it right away. thats all there is to it. I only drive mine in town on the weekends. I bought a little Chevy S-10 pickup to commute in. I will never sell my Cruiser.
__________________ 4 Chevys and a Yota ////////////////////////////// 1994 4X4 Silverado pickup 2000 S-10 pickup 2000 Monte Carlo SS 2003 Trailblazer LTZ and a little old 1974 FJ-40 |
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05-21-08, 07:10 AM
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#3 | |
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Noaccount Webwheeler
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Quote:
Install an in-cab vacuum gauge and learn to keep manifold vacuum as high as possible. That will buy you a little more mileage. Remember the "Mobil Economy Run" that Rambler usually won? They offered a fuel economy gauge from the factory that did not have numbers on the dial but a green, yellow and red zone......it was a vacuum gauge. Actually pretty helpful in changing your driving habits. Did you ever get the HEI wiring figured out? GL Ed __________________ There is nothing so depraved as a man in the depths of an ether binge '66FJ40, Fresh 2F, H42/Orion(By Poser...LCR4WD), ARB Front/rear(By Poser...LCR4WD), MetalTech Cage installed by Poser, Screw-ups fixed(by Poser) 4WDB Corvette Master, Mini Truck PS, 3.5" Lift, Warn 8274, 33s on stockers 
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05-21-08, 07:13 AM
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#4 |
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IH8MUD Lifer
Join Date: Aug 2005
Location: Alabama
Posts: 1,288
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What mileage are you getting now on the road?
__________________ 1974 FJ40 FI vortec 350, H42/Orion 4:1, 4" lift, 35x15.50 SXs on MRW beadlocks, lock-rited f/r, Saginaw ps, etc, etc. 1994 FZJ80 with lockers and 285 revos. |
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05-21-08, 11:29 AM
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#5 | |
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IH8MUD Lifer
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Quote:
It would be interesting to know what mileage you are seeing on the highway. Then we could tell you better where or if to consider changing something. __________________ 9/70 FJ40 +Rollbar 9/64 FJ45 (L) P-B with restored wiring 4/84 Toy 4x4 Mini PU "The hungry sheep look up, and are not fed: but, swol'n with wind, and the rank mist they draw, rot inwardly and foul contagion spread."--Milton |
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05-21-08, 12:26 PM
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#6 |
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IH8MUD Lifer
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In my 4cyl commuter I can get about 20% higher mileage if I'm paying attention to the instant mileage meter vs not. Use neutral coasting down hills, up to and down the off ramp and up to a red light or stop sign. Accelerate like an old lady. Shift fairly early. Go slow. You'll get way better mileage at 45 or 55 vs 65.
IMO, you'll get better mileage with a nicely rebuilt and tuned stock carb. __________________ トヨタさん、ありがとうございました。 My '78 FJ40 - '73 and '78 FJ40 parts FS - WTB:Olive (653) Bib and Windshield frame -- Originally Posted by OZCAL Woke up the next day with a partially detached retina, wrapped in a sheet on a wooden floor, in a storeroom upstairs from a barbershop. |
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05-21-08, 12:35 PM
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#7 |
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IH8MUD Lifer
Join Date: Feb 2002
Location: OC, CA
Posts: 5,039
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Get a beater Honda Civic or a bicycle
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05-21-08, 12:37 PM
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#8 |
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IH8MUD Lifer
Join Date: Nov 2005
Location: 100 Forum Roadhouse
Posts: 1,860
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Goodbye, FJ40; hello, '93 Metro.
__________________ '75 FJ40. V8. SOA. Cage. Lockers. Not done... "The FJ is Toyota's answer to the Jeep CJ, and flame wars between fanboys of the two vehicles will continue long after the apocalypse begins. The consensus is the Toyota will take more abuse -- a big plus when roaming the desolation -- but it's harder to fix when something goes sideways. Fortunately, it's a Toyota, so you'll break before it will." |
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05-21-08, 12:39 PM
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#9 |
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IH8MUD Lifer
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Have you tried to raise your tire pressure?
__________________ Enjoy  Brian Passey KE7TGH wasatchcruisers 71 FJ40 Stinky 94 FZJ80 Ryoku Ryu Cruiser ring's anyone Stuff I've done... My 40 work in progress |
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05-21-08, 12:48 PM
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#10 | |
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IH8MUD Lifer
Join Date: Aug 2005
Location: Alabama
Posts: 1,288
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Quote:
__________________ 1974 FJ40 FI vortec 350, H42/Orion 4:1, 4" lift, 35x15.50 SXs on MRW beadlocks, lock-rited f/r, Saginaw ps, etc, etc. 1994 FZJ80 with lockers and 285 revos. |
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05-21-08, 12:55 PM
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#11 |
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IH8MUD Regular
Join Date: Sep 2006
Location: St. Louis, MO
Posts: 211
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Sell to me. Then you will not have to worry about it.
Just kidding, no but seriously sell to me. __________________ "Yes I have a Pool, I have a Pool and a Pond, the Pond would be good for you." |
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05-21-08, 12:58 PM
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#12 |
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IH8MUD Lifer
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Great Mpg Enhancers!!!
Well lets see...
 You could buy one of those magnets that clips around the fuel line....  You can buy a kit that lets you burn water (converts water to HHO) Bolts right up to your existing carb... You could but a Tornado insert for the air cleaner but I don't know if they make one for the FJ40... You could run helium in your tires at 45 psi... Guys, did I miss anything? Feel free to add to this, uh, list of GREAT MPG ENHANCERS!!! __________________ !Oy my 1971 FJ40 Not Road Legal http://tinyurl.com/47zpb (My Web Site) http://tinyurl.com/2h6hc7 (Nut and Bolt Spreadsheet) |
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05-21-08, 01:17 PM
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#13 |
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Drive-by Poster
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Build a custom nose cone, and a tail cone to enhance the "brick" aerodynamics of our lovable FJ40's, and you'll see a vast improvement in MPG...
 Edit: Ohh and don't forget to take pictures... __________________ Mark 76 FJ40-- Weekend Warrior..  ...97 Tacoma-- Daily..  ..When faced with a complicated task, give it to a simple man, who in turn will find a simple solution... My (not so much mine) Finish thread… |
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05-21-08, 02:26 PM
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#14 |
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Search 1st, THEN ASK
Join Date: Sep 2002
Location: Kilgore, TX
Posts: 752
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According to "UA FJ 40", switching to an electirc fan should get you 1-4 MPG better.
__________________ 72' FJ55 - SOA, SR, DB, FJ62 PS, Webber, Header, H.E.I., 37 X 12.5 X 15 MT/R's, Savanah-heat air freshener. 73' FJ40 - Long term project in the hands of HappyChappy 83' FJ60 - Mint Condition 07' FJC - Atrac Hack - DD 08' Tundra, 4.7 2WD - Company Truck |
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05-21-08, 02:41 PM
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#15 | |
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IH8MUD Lifer
Join Date: Aug 2005
Location: Alabama
Posts: 1,288
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Quote:
Don't put words in my mouth. __________________ 1974 FJ40 FI vortec 350, H42/Orion 4:1, 4" lift, 35x15.50 SXs on MRW beadlocks, lock-rited f/r, Saginaw ps, etc, etc. 1994 FZJ80 with lockers and 285 revos. |
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05-21-08, 02:44 PM
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#16 |
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Search 1st, THEN ASK
Join Date: Sep 2002
Location: Kilgore, TX
Posts: 752
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Electric water pump, PS pump, and cooling fan should make a 30 MPG FJ40, wouldnt you think? HAHA
__________________ 72' FJ55 - SOA, SR, DB, FJ62 PS, Webber, Header, H.E.I., 37 X 12.5 X 15 MT/R's, Savanah-heat air freshener. 73' FJ40 - Long term project in the hands of HappyChappy 83' FJ60 - Mint Condition 07' FJC - Atrac Hack - DD 08' Tundra, 4.7 2WD - Company Truck |
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05-21-08, 02:59 PM
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#17 |
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IH8MUD Lifer
Join Date: Aug 2005
Location: Alabama
Posts: 1,288
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The only way to get 30 mpg in a 40 is to tow it.
__________________ 1974 FJ40 FI vortec 350, H42/Orion 4:1, 4" lift, 35x15.50 SXs on MRW beadlocks, lock-rited f/r, Saginaw ps, etc, etc. 1994 FZJ80 with lockers and 285 revos. |
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05-21-08, 03:11 PM
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#18 |
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Search 1st, THEN ASK
Join Date: Sep 2002
Location: Kilgore, TX
Posts: 752
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Or drive the first 15 miles (lucky) and then walk the second 15 miles... haha
To turn this back to tech: Run the skinnest, most non-aggressive tires you can inflated to a pretty high pressure and make sure you have your engine totally tuned up with good plugs, wires, etc. __________________ 72' FJ55 - SOA, SR, DB, FJ62 PS, Webber, Header, H.E.I., 37 X 12.5 X 15 MT/R's, Savanah-heat air freshener. 73' FJ40 - Long term project in the hands of HappyChappy 83' FJ60 - Mint Condition 07' FJC - Atrac Hack - DD 08' Tundra, 4.7 2WD - Company Truck |
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05-21-08, 05:20 PM
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#19 | |
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Noaccount Webwheeler
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Quote:
Well, yes, all that. However, driving habits have a huge effect on mileage, therefore the vacuum gauge. It can help you change the way you drive it. Vagabond, doesn't your Holley open up both barrels at the same time, like a Weber 38/38? You might do better with a stock carb with progressive linkage. But no matter what you have, the long skinny pedal and it's operation are key to getting the best mileage that the '40 can deliver. GL Ed __________________ There is nothing so depraved as a man in the depths of an ether binge '66FJ40, Fresh 2F, H42/Orion(By Poser...LCR4WD), ARB Front/rear(By Poser...LCR4WD), MetalTech Cage installed by Poser, Screw-ups fixed(by Poser) 4WDB Corvette Master, Mini Truck PS, 3.5" Lift, Warn 8274, 33s on stockers
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05-21-08, 05:30 PM
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#20 |
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IH8MUD Junior
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Window stickers help for horsepower, not sure about mileage tho. Good luck in your search. I've had my 40 for 5 months now and haven't put gas in it yet. It's in pieces in the garage. I'm waiting till gas hits $5 a gallon before I put it back together... Guess I better hurry.
__________________ Bill Somerset, PA USA 2007 FJ Cruiser 1966 FJ40 (Link:New Project) Proud member of ALCA! |
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05-21-08, 05:31 PM
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#21 |
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IH8MUD Lifer
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Other than the usual like having proper air pressure, tune upstuff, etc. have a you tried considered swapping your holley for an OEM carb? Have you seen the hydrogen kits on ebay? How many miles are you get now? You may already be getting best mpg possible.
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05-21-08, 06:25 PM
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#23 | |
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Noaccount Webwheeler
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Quote:
You diesel guys piss me off  I've never "POPPED" anything into my cruiser.................. __________________ There is nothing so depraved as a man in the depths of an ether binge '66FJ40, Fresh 2F, H42/Orion(By Poser...LCR4WD), ARB Front/rear(By Poser...LCR4WD), MetalTech Cage installed by Poser, Screw-ups fixed(by Poser) 4WDB Corvette Master, Mini Truck PS, 3.5" Lift, Warn 8274, 33s on stockers
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05-21-08, 06:26 PM
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#24 |
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IH8MUD Lifer
Join Date: Feb 2002
Location: OC, CA
Posts: 5,039
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Learn how to slip stream tractor-trailers.
This actually works, but you have to pay attention and be sure to have good brakes. |
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05-21-08, 09:01 PM
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#25 |
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IH8MUD Junior
Join Date: May 2008
Posts: 162
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water injection
keeps head temps low, water expands well in the heat of the engine, mixed w/a little alcohol and you get over-all better octane rating, and a kit is less than $200.
Should buy you 1-2miles/gallon. That is huge over a year or two. This setup also will help prevent dieseling and help retard dirt accumulation on valves. Cheap generic kits on Fleabay. |
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05-22-08, 06:56 AM
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#26 |
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IH8MUD Addict
Join Date: Mar 2007
Location: Connecticut
Posts: 564
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Get any extra weight out of the cruiser.
__________________ Speed bumps hurt 78 FJ 40 Russstard..and a sistership for parts |
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05-22-08, 07:44 AM
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#27 | |
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IH8MUD Regular
Join Date: Dec 2007
Location: Lilongwe
Posts: 342
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Quote:
 You can sell the excess...Sorry! Couldn't resist. I'm paying $5.77/gal for diesel duty-free right now; $7.10/gal for 87 octane petrol, and the gummint is talking about raising prices again  Still not as bad as avgas - $18.90/gal for 100LL! Glad my commute is only 9km per day.__________________ |
vagabond
