Non v8 motor swap- economy

[jazzzmonky]

Im very seriously considering restoring an fj40. The only thing that concerns me is the mpg they get. The price of gas is a real problem for me. I heard fj40s with the 2f engine get about 11mpg. Is this true? The best way around this I can think of is to swap in a smaller more contemparary motor and keep the rest of the drive drive train. I know people swap in V8s all the time but has any one done some thing smaller. Is this doable and realistic. Will I be able to mary a smaller newer inline engine with the stock fj40 drive line? Will I beable to sell the fj power plant for anything?

thanks

 

[moparrich]

I Recently Saw A Toyota Pick Up V6 Swapped In They Used 5 Speed And Tc From Truck As Well Made For A Clean Swap

 

[Poser]

Welcome.


Purchase a vehicle to commute with and drive the Land Cruiser recreationally.



If there were an engine that was smaller in displacement that was more efficient and would be a cost-effective alternative, someone would have done the swap a long time ago.


Fuel costs what it does, and it is very unlikely to decrease in any significant amount anytime soon, if ever.



Good luck!


-Steve

 

[Poser]

I Recently Saw A Toyota Pick Up V6 Swapped In They Used 5 Speed And Tc From Truck As Well Made For A Clean Swap

Please have them post up the mileage they are currently getting.....

 

[MoCoNative]

I would be curious on that V-6 mileage also.

I'm running a 1F, in a stock 73 FJ-40, I'm getting a good solid 15 MPG. That is rain, shine, snow, sleet, hubs in or out, always around 15. That is with a 77 2F carb on it and electronic ignition, all else is original or nearly so. That is also at 6200 feet in altitude, which does make a difference in mileage on an old cruiser.

My 84 FJ-60 with the bigger 2F gets about 13 to 14 MPG, on average, 16 to 17 on a good day on the highway, that is at normal speeds of 60 to 65. I don't speed much. It needs the original cat with 204,000 miles on it scrapped, maybe it could breath then.

So mileage on an F series engine is actually fair for me. Not great mind you, but go and look at a new Toyota pickup, or worse yet new Dodge, Ford or GM make. I can buy alot of gas for an old cruiser before I spend 45,000 dollars on a new truck that only gets 17-22 mpg.

 

[Tigerstripe40]

Im very seriously considering restoring an fj40. The only thing that concerns me is the mpg they get. The price of gas is a real problem for me. I heard fj40s with the 2f engine get about 11mpg. Is this true? The best way around this I can think of is to swap in a smaller more contemparary motor and keep the rest of the drive drive train. I know people swap in V8s all the time but has any one done some thing smaller. Is this doable and realistic. Will I be able to mary a smaller newer inline engine with the stock fj40 drive line? Will I beable to sell the fj power plant for anything?

thanks

Not true.
You can do MUCH better.
Timing and Carbureation is key.
The SEARCH function is your friend.

:shotts:

 

[Tigerstripe40]

I think that running a 1GR-FE (4.0 liter out of a Taco/Runner/GSJ Cruiser) in an FJ40 would be pretty killer.

It would be ALOT of work though.

 

[Enigma]

From some old technical standpoints, wasnt part of the V8 theory about better mileage due to more horsepower to weight ratio? Ignoring the fact that once you have a V8, you tend to to put your foot into it more.
As for the 'yota V6 (3.4 or 4 litre), they get pretty lame mileage. I think my tacoma is rated at around 18 mpg.

 

[Fast Eddy]

Im very seriously considering restoring an fj40. The only thing that concerns me is the mpg they get.

Restore a BJ-40 Diesel instead. MPG of 20+ is the rule.

 

[bandy rooster]

get a diesel or i'd try 4.3 liter cheby

 

[okie]

Welcome.


Purchase a vehicle to commute with and drive the Land Cruiser recreationally.



If there were an engine that was smaller in displacement that was more efficient and would be a cost-effective alternative, someone would have done the swap a long time ago.


Fuel costs what it does, and it is very unlikely to decrease in any significant amount anytime soon, if ever.



Good luck!


-Steve

ha i have to diasagree with you. I think the best bang for your buck would be making the car of your dreams ( an fj40) fuel efficient to the best fo its ability so you could drive ti daily and use it to recreate with. I think it is a waiste to have a vehicle you bairly are going to use. Even if you barely use it with what we are paying to day in gas ; it would pay itself back if you found a way tp make it even somewhat fuel efficient.

there is a thread on here that shoes a mid 90s cruiser engine going into an fj45 ( an early year)

Ime sure there are many engines you could make work with the old fjs.I personally would stick with a new wngine ( or rebuilt) for the best fuel effeciency. If anything is warn the slightest in an old engine it will drop your mpg like a bag of potatoes.

jsut my two cents. Sorry Poser . to each his own. You are a book full of advice though and a great help!

PEACE!

 

[jazzzmonky]

Thanks for all of the advice. I think im going to look into pricing rebuilt engines, or finding a good candidate at a junk yard to do it myself. What do you guys think it would involve to mary a non f motor onto the stock fj40 drive train?

 

[fj40charles]

Not true.
You can do MUCH better.
Timing and Carbureation is key.
The SEARCH function is your friend.

:shotts:

I think any fuel factory injected motor would get better mileage than a carb'd motor (equal/similar size engine displacement).

 

[zebrabeefj40]

Thanks for all of the advice. I think im going to look into pricing rebuilt engines, or finding a good candidate at a junk yard to do it myself. What do you guys think it would involve to mary a non f motor onto the stock fj40 drive train?

Check out the tech links at the top of the page. Plenty of reading there on typical swaps. Me? I'd look at a GM 4.3L V6 from an S10 or similar...as done here: https://forum.ih8mud.com/showthread.php?t=43710

HTH,
Nick

 

[Josie'sLandCruiser]

Hi All:

The problem with *any* 40/45/55 Series Land Cruiser is the weight, lack of aerodynamics, and rolling resistence. Sure, the "F" or "2F" engines are not particularly fuel efficient, but neither is a 350 CI CSB!

The factory BJ40 used a high axle ratio and a 3.0 Litre NA diesel to get better fuel mileage than the 4.2Litre petrol 2F. On the BJ42 they bored out the engine to 3.4 L (3B) and added a five speed tranny (H55F.)

To use a "modern" engine in a 40 Series to get better fuel mileage would require, IMHO not only a transmission swap but also the transfer case and axle assemblies; i.e. getting rid of the off-set output transfer case and offset axle assemblies (too much friction!.)

Regards,

Alan

 

[fj40charles]

Hi All:

To use a "modern" engine in a 40 Series to get better fuel mileage would require, IMHO not only a transmission swap but also the transfer case and axle assemblies; i.e. getting rid of the off-set output transfer case and offset axle assemblies (too much friction!.)

Regards,

Alan

Can you explain how having an offset axle assembly would cause significant more friction?

Why do you need to swap the transmission? If you need lower gears, you could swap out to third member with some 3.73 gears or user bigger tires.

The reason I'm asking is because I've never heard of this.

 

[MoCoNative]

All I can figure on the offset, is the fact the final drive has to run through two large heavy gears in the transfer. The alternative is like a Ford, Chevy Toyota pickup etc, where the rear drive shaft comes out straight from the rear of the transfer case and is in direct line with the output of the tranny. Here there are fewer moving parts, less friction, and less noise than a cruiser.

I heard that was a continued complaint on Grand Cherokees, that they had too much drivtrian noise because of the the double offset and the gears whining in the transfer. Luxury and quiet drivetrains are for whimps

 

[dgangle]

Im very seriously considering restoring an fj40. The only thing that concerns me is the mpg they get. The price of gas is a real problem for me.

Let me chime in here. You state you are considering 'restoring' and FJ40...the term 'restoring' means different things to different people but all will agree that however you define it, it is going to cost a boatload of money. If the price of gas is a real problem for you, then this tells me you don't have the coin or commitment to 'restore' anything. For a reality check, go price a real paint job. I paid more for my paintwork than a good used car cost. It's like the guy at the gas station complaining about putting $300 worth of fuel in his $300,000 diesel pusher with a dual slide, satellite TV and flat towing a Hummer.

If you wanna play you gotta pay!

Take the FJ body and put it on a Neon drive train but you still end up with something as aerodynamic as a barn door.

 

[kellyo]

Unless you go desiel the mileage will always be crappy. Thats just the price of admission. They are heavy and have the aerodymanics of a sheet of plywood pushing into the wind.

 

[Walton]

If you are going to restore it....Keep it Simple and Pure....Leave the original equipment in it...