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Engine swaps for 72-80 trucks- max mileage *DELETED*
#1708898
12/10/14 12:47 PM
12/10/14 12:47 PM
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Joined: Feb 2006
Posts: 1,179
Canada
demon
OP
super stock
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OP
super stock
Joined: Feb 2006
Posts: 1,179
Canada
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Re: Engine swaps for 72-80 trucks- max mileage
[Re: dogdays]
#1708904
12/10/14 02:06 PM
12/10/14 02:06 PM
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Joined: Jan 2003
Posts: 5,783
Corpus Christi, TX
shanker
master
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master
Joined: Jan 2003
Posts: 5,783
Corpus Christi, TX
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depending on your budget..
if it was enough to cover a diesel swap, Id got 4BT in a HEARTBEAT!
otherwise, a big block (383/400/400) built conservatively with good low end torque and 3.21 to 2.76 gears would be OK enough to get you into the high teen's..
There was a guy either here or on RCC, that had a 4BT in a 74-75 Ramcharger and claimed to get 30MPG Highway/25MPG City.
The Federal Government has not yet learned that you cannot legislate morality
1970 Coronet R/T FF4/FF8/V85/V1G 440/Auto/3.23
1970 Coronet R/T FK5/FK5/V8W/V1W 440/Auto/3.55
1970 Super Bee TX9/TX9/V8W/N96 383/Auto/3.91
1975 Duster 360 VS29L5 Daily Driver
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Re: Engine swaps for 72-80 trucks- max mileage
[Re: shanker]
#1708905
12/10/14 03:49 PM
12/10/14 03:49 PM
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Joined: Dec 2009
Posts: 20,627
in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,627
in a cattle trailer down by th...
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"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon!
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: Engine swaps for 72-80 trucks- max mileage
[Re: shanker]
#1708906
12/10/14 04:05 PM
12/10/14 04:05 PM
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Joined: Jan 2003
Posts: 10,538
Freeport IL USA
poorboy
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,538
Freeport IL USA
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Assuming the motor is in good condition, one might think more MPG can be had through driver input, and vehicle usage then through mechanical modification. Then more MPG would likely come from transmission (OD) and axle gearing then through motor changes, and that gearing change has to be towards the most often truck usage. Changing gearing and motor functions for highway mileage is pretty useless if the truck spends its time in the city, and if that driving time is mostly done on short trips when the motor seldom reaches operating temperature, nothing much is going to help. These mileage threads always turn into a pizzing match.  Gene
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Re: Engine swaps for 72-80 trucks- max mileage
[Re: CTD5.9]
#1708908
12/10/14 04:40 PM
12/10/14 04:40 PM
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Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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Quote:
Another starting point for a mid 70's ramcharger would probably be a transmission/transfer case swap. A 518 and part time 4wd will probably get you a few MPG
If the OP could snag a complete 92-95 ram or dakota that would be ideal. I would swap over the engine, trans, efi and diffs. I would not want a 70's full time 4wd for any kind of mpg.
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Re: Engine swaps for 72-80 trucks- max mileage
[Re: DaytonaTurbo]
#1708909
12/10/14 06:10 PM
12/10/14 06:10 PM
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Joined: Feb 2013
Posts: 760
Canada
CTD5.9
super stock
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super stock
Joined: Feb 2013
Posts: 760
Canada
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Quote:
If the OP could snag a complete 92-95 ram or dakota that would be ideal. I would swap over the engine, trans, efi and diffs. I would not want a 70's full time 4wd for any kind of mpg.
A 92-93 would work, 94+ would be a ton of work.
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Re: Engine swaps for 72-80 trucks- max mileage
[Re: CTD5.9]
#1708910
12/10/14 06:26 PM
12/10/14 06:26 PM
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Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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Quote:
Quote:
If the OP could snag a complete 92-95 ram or dakota that would be ideal. I would swap over the engine, trans, efi and diffs. I would not want a 70's full time 4wd for any kind of mpg.
A 92-93 would work, 94+ would be a ton of work.
As long as it's 95 and earlier it's doable. Once you hit 96 and the OBD-2, the wiring and ecu issues become a nightmare. The OBD-1 engine harnesses can be dissected realitively easily. And once you're done you will find the engine harness is remarkably self contained. I think I only had to connect two or three wires to the carbed engine harness to get the engine to run.
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Re: Engine swaps for 72-80 trucks- max mileage
[Re: demon]
#1708913
12/11/14 12:56 PM
12/11/14 12:56 PM
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Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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Quote:
Another possibly I considered is a Jeep 4.0 liter 6.
The biggest difficulty in any swap is the transfer case. Anyone know Jeep transfer cases?
Yeah they put the front driveshaft on the driver's side of the trans. I found this one out when I swapped a 318 magnum into my Jeep. Put the front driveshaft right where the 5.2 starter wanted to be!
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Re: Engine swaps for 72-80 trucks- max mileage
[Re: CTD5.9]
#1708914
12/11/14 12:57 PM
12/11/14 12:57 PM
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Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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Quote:
Sorry you are correct on the engine, I was thinking more along the lines of the transfer case + differentials. They switched to the coil over front and the drivers side drop in 94 which would make swapping them in a ton of work. I think an old transfer case would bolt up to the transmission though.
Ok I'm not as familiar with those. If a guy was to swap in the newer diffs with the the newer transfer case and trans how would that work?
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Re: Engine swaps for 72-80 trucks- max mileage
[Re: DaytonaTurbo]
#1708915
12/11/14 03:18 PM
12/11/14 03:18 PM
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Joined: Feb 2013
Posts: 760
Canada
CTD5.9
super stock
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super stock
Joined: Feb 2013
Posts: 760
Canada
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Quote:
Ok I'm not as familiar with those. If a guy was to swap in the newer diffs with the the newer transfer case and trans how would that work?
trans and transfer case would be fine, The front diff would need major frame work since they did away with the leafs. You could however find an older ford Dana 44 or 60 and put it in to work with the new transfer case.
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Re: Engine swaps for 72-80 trucks- max mileage
[Re: demon]
#1708917
12/12/14 03:43 PM
12/12/14 03:43 PM
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Joined: Aug 2004
Posts: 3,310
Walnut Creek, CA
blown340
master
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master
Joined: Aug 2004
Posts: 3,310
Walnut Creek, CA
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Thinking outside the box, what about the mercedes OM606 turbodiesel? Great mileage and very tuneable. They can be retrofit with a mechanical injection pump from the (i think) OM603. Its a car based engine so it would have more flexibility in RPM range than a 4bt as well as being much lighter.
-Jon
70 challenger convertible. 340/5 speed. blown, intercooled, efi, blah blah blah
71 valiant scamp 318/A833OD/AC/PS
00 dakota RC 4.7L 5 spd autoX'r. SRT10/T56 swap in process
73 W200 Power wagon, PTO winch, 4 spd
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