1fzfe vs 1hdFT/FTE (1 Viewer)

[TT33]

First off, Trust me I looked. There are countless threads regarding the swap, and how the diesel engine is just better and "more powerful" but no real explanations. I am not planning to do the swap (I will probs just turbo 1fzfe it comes with, actually dont have 80 yet, but its on my short list), hopefully next year.)

So what is so good about 1hdFTE vs 1fzfe?? I mean gas has more horsepower, while FTE has slightly more torque, which can be easily had in gas engine with a little mods like different intake, chip and headers, but hp figure will be way more than diesel. I understand that diesel makes power at lower rpms, but at the same time that can't really be that significant (unless you starting from standstill with heavy load)

I mean both make about same HP/Torque, so whats the catch? Unless you care about fuel economy (which again is speculative--- think about how much gas you can buy with money you save by not doing engine swap). I would have thought that 1hdfte could be tuned to make more power, but then again so can 1fzfe with its iron block---- (think 2jz).

I guess what I am asking is referring to all gas vs diesel. Whats so great about it, that people spend so much money, do so much work for equal or less hp/torque specs. My question is purely speculative, and I am trying to understand the benefits other than towing really heavy loads at low speeds and fuel economy

 

[inkpot]

You are comparing a boosted diesel to a naturally aspirated gasser. If the gasser had a a similar boost setup, it would be much stronger, faster.
There are very few hot rod parts for either of these motors. Nobody has ever broken the code for the ECU on the 1fz. Good luck with that. Gassers have a much wider rpm range and typically a faster throttle response. I would try driving the 1fe for a while before deciding to swap it out. The 1hdFTE was never available in the U S, so parts availability and knowledgeable mechanics are few and far between.

 

[LINUS]

This is almost a “troller thread” IMO since I don’t do any social media.

You’re trying to compare a Siberian tiger to a African cheetah - in my version of an analogy of motors.

A diesel has clear advantages, just like a reliable gasoline 4.5 forklift motor.

You personally need to decide if you want a spark plug motor or if you want to glowplug your Landcruiser.

YOU need to decide the fuel you want to run, then we can “split hairs” on what motor you swap. It’s 100% on you if you choose to either go gas or diesel.

From there we can help, but until you decide for yourself this is a pointless thread.

Decide - glowplugs or sparkplugs.
Then come back & ask questions.

 

[baldilocks]

It boils down to - people want what they don’t have.

 

[Imwhere]

I think you need to drive both. They make the same HP/Tq on paper but are very different beasts to drive and also intercool/exhaust and up the boost on a diesel makes a big difference.
I have a manual DT and love it, it will idle up anything off-road, pull in any gear on road and is great on fuel.
It depends on what you want it for really

 

[clx16]

@LINUS haha "a reliable gasoline 4.5 forklift motor." I like my fork lift motor. No experience with it but always seemed like overkill. But i know little about forklifts and assumed they needed the weight as counter balance

To the OP...besides money, you can always have both.

 

[Douglas S]

The diesel is dead simple (the HD-FTE being the most complicated as it's electronically controlled, it was also never offered in an 80 - IMO the "pinnacle" Toyota diesel of the 90's is the 1HD-FT), easy and cheap (compared to 1FZ-FE) to make more power with, and you will go a lot further on a tank of fuel.

I don't think it's necessarily just the case of people wanting what they don't have, in places where both engines are common the diesel always commands a premium.

 

[Dragos80]

Gosh, not another gas vs diesel thread. The internet is full of this crap.

This one belongs to Chat, not 80's tech. Seriously.

 

[gofast]

Lets make it practical and I've owned domestic market offerings - 3B in my Canadian BJ 60 and 70, JDM 1hz in my 73 series, and 1fze in my 80.

The 80 is my first gasser in 15 years.

Damn I like going to Napa and also getting readily available OEM parts.

Saves a wack load of time and cost.

On paper the hdt gets about 2mpg more than the 1fze. In reality the hdt its way more fuel efficent in low range.

Your call

 

[alia176]

Given the hwy speeds in the USA, I can't imagine a 1HD-FT will be THAT much more fuel efficient than a gasser. They both get similar MPG I'm guessing at 75mph. The two folks who have converted to the 1HD-F variety engine told me that they don't drive over 65 mph in order to achieve the best MPG.

As has been stated already, the 1HD-FT shines in 4low, and that is very attractive. But, consider this; if you're the ONLY one in the group with this engine and the rest have gassers, you will still be forced to go to the fuel stations for refueling even though you may not it!

 

[mudgudgeon]

iven the hwy speeds in the USA, I can't imagine a 1HD-FT will be THAT much more fuel efficient than a gasser. They both get similar MPG I'm guessing at 75mph.

My FZJ80 so far has achieved a best of 14.5 litres per 100km highway mileage @ 70-75mph. 1HD-FTE would be around 11L/100km for the same trip

 

[Tapage]

Gassers have a much wider rpm range and typically a faster throttle response.

yes to first no to second statement ..

torque from Diesel will give you a better faster response ..

 

[baldilocks]

Gosh, not another gas vs diesel thread. The internet is full of this crap.

This one belongs to Chat, not 80's tech. Seriously.

Yeah, we should be flooding the anals of Mud with rhetoric about how badly we need to spend untold thousands to have a 6 speed auto in a truck that was actually designed to drive moderate to low speeds on s***ty roads in countries most of us will never see. The OP has a legit question.

 

[Dragos80]

Yeah, we should be flooding the anals of Mud with rhetoric about how badly we need to spend untold thousands to have a 6 speed auto in a truck that was actually designed to drive moderate to low speeds on s***ty roads in countries most of us will never see. The OP has a legit question.

Who said we need a 6 speed tranny to break the sound barrier? Gearing is where it's at.


Anyway, on with the non Toyota or 80 Series stupid universal topic:

gas vs diesel at DuckDuckGo

gas vs diesel - YouTube


The OP dropped the bomb and left. Troll.

 

[TT33]

OH I already decided that it will be gas motor---1fzfe, and possibly turbo kit down the line if the engine doesnt perform well with 35-37 tires. Goal for this vehicle will be occasional offroad fool-around on mountain trails, tow track car to track, and 2-3 year camping trip vehicle. Its just i had experience with driving Patrol y61 with 3l diesel--- damn that thing was slow, so when people do swaps of gas for diesel, I dont quite get it, considering the extra weight, and less power. from what I see, is diesel actually better at low speeds, ( but at highway speed, gas is more receptive and faster) and I guess this explains the swaps.

 

[Heckraiser]

Clydesdale vs. thoroughbred

Or in the case of the 3fe, this:

 

[Douglas S]

OH I already decided that it will be gas motor---1fzfe, and possibly turbo kit down the line if the engine doesnt perform well with 35-37 tires. Goal for this vehicle will be occasional offroad fool-around on mountain trails, tow track car to track, and 2-3 year camping trip vehicle. Its just i had experience with driving Patrol y61 with 3l diesel--- damn that thing was slow, so when people do swaps of gas for diesel, I dont quite get it, considering the extra weight, and less power. from what I see, is diesel actually better at low speeds, ( but at highway speed, gas is more receptive and faster) and I guess this explains the swaps.

A Y61 patrol diesel is not remotely comparable to a 1HD-T/FT.

 

[Red Merle]

Clydesdale vs. thoroughbred

Or in the case of the 3fe, this:

That looks like a really friendly little burro. I bet his name is Doug. Doug never did anything bad to anyone. Why do you have to be so mean?

 

[CycloSteve]

Have had the TRD charged motor and the 1HD-FT motor in the same rig. Also swapped over to the H151F. The rest of the truck is identical.

Miles driven with both motors is just about 25,000, with 8,000 towing a 3,000 pound trailer with the diesel.

The following numbers tell an interesting story.

MPG for 1FZ-FE with A343:

Average = 10.6
Best = 13.3

MPG for 1HD-FT with H151F:

Average = 18.3
Best = 24.8

And yes, the diesel makes a ton more torque.

 

[Red Merle]

Have had the TRD charged motor and the 1HD-FT motor in the same rig. Also swapped over to the H151F. The rest of the truck is identical.

Miles driven with both motors is just about 25,000, with 8,000 towing a 3,000 pound trailer with the diesel.

The following numbers tell an interesting story.

MPG for 1FZ-FE with A343:

Average = 10.6
Best = 13.3

MPG for 1HD-FT with H151F:

Average = 18.3
Best = 24.8

And yes, the diesel makes a ton more torque.

So it saves about $1500 per year less in fuel costs if you drive 15,000 per year. How much did your swap cost?