I need a bigger engine....

Quote:

---

Originally Posted by Dougal

Some food for thought.

The 4BD1T and 1HD-FTE have basically the same peak efficiency. ~210g/kwh at rated torque.
The displacement is within 10%.
So given the same fuel and air, the 1HD-FTE is going to deliver the same results. The increase in displacement and 4 valve per cylinder means it can deliver a fraction more airflow for the same boost.

So the only way a 1HD-FTE is going to deliver any more power is by spinning faster, which is where the efficiency drops and fuel burn starts to really suck.

At lower loads the 1HD-FTE with more internal friction (two extra cylinders) suffers an efficiency penalty and burns more fuel. My fathers 1HD-FTE cruiser has just done 200,000km from new and has never broken 10km/litre. Even when driven like the proverbial grandfather (the steering is too vague to drive it fast anyway).

So.
You want more go. You need more boost and more fuel to go with it. It's that simple. Changing engines ain't going to help much.
You'll also be looking at something better than the LT95.

---

Thanks Dougal,

Yes I figured that a bit of an overhaul and slight power up should work wonders. The LT95 is I feel quite capable, I have TR bearings in the transfer, and good gear ratios as far as I can tell with this load, even on hill starts. It'll hold top gear too up hills towwing even down to 75km/h. Only had to use low range to park/ maneuvre.

The engine as I mentioned has some big miles, and injectors and pump untouched. TB25 turbo and a BIG FMIC. I guess that wouldmn't help the cooling for the rad, either.

There will have to be a bit of an engine and fuel system upgrade/ overhaul sometime this year or next I reckon:)

JC

Hi JC,
I too had done 285,000 kms and was when I had starting problems (turned out to be the starter who would of thought:p) and I went and got the injectors tested as they had never been touched. 3 out of four diddn't even move the needle on the tester and produced just a drip and the 4th one only just had a tiny bit of crack pressure. $400 clams later I had some overhauled injectors and no more drippy fuel going in the pots. Its cheap maintenance realy. The injector dude wouldnt shut up about fuel filters filters filters! So change your fuel filter with every oil change. Theyre cheap.

Loving the discussion.
Brian.

Quote:

---

Originally Posted by justinc

Thanks Dougal,

Yes I figured that a bit of an overhaul and slight power up should work wonders. The LT95 is I feel quite capable, I have TR bearings in the transfer, and good gear ratios as far as I can tell with this load, even on hill starts. It'll hold top gear too up hills towwing even down to 75km/h. Only had to use low range to park/ maneuvre.

The engine as I mentioned has some big miles, and injectors and pump untouched. TB25 turbo and a BIG FMIC. I guess that wouldmn't help the cooling for the rad, either.

There will have to be a bit of an engine and fuel system upgrade/ overhaul sometime this year or next I reckon:)

JC

---

Quote:

---

Originally Posted by Ancient Mariner

What s the torque on the 3uz at 1400 RPm
Thanks AM

---

You need another zero on the RPM's to get it really going.

Quote:

---

Originally Posted by goanna_shire

Hi JC,
I too had done 285,000 kms and was when I had starting problems (turned out to be the starter who would of thought:p) and I went and got the injectors tested as they had never been touched. 3 out of four diddn't even move the needle on the tester and produced just a drip and the 4th one only just had a tiny bit of crack pressure. $400 clams later I had some overhauled injectors and no more drippy fuel going in the pots. Its cheap maintenance realy. The injector dude wouldnt shut up about fuel filters filters filters! So change your fuel filter with every oil change. Theyre cheap.

Loving the discussion.
Brian.

---

Agree brian, my engine has a known history from new, i am the second owner of it. filters are done at every engine oil change like the first owner did (my uncle) and i am sure this is why this engine is still as strong as an ox:)
its bizarre that when he bought it new in 1988, i had no inkling that i would end up with the engine out of his county after it had travellec 450,000 faultless (except for 3 lt85 overhauls:() km's:)

jc

Quote:

---

Originally Posted by clubagreenie

You need another zero on the RPM's to get it really going.

---

:eek:



:lol2:

Maybe a smaller motor, 2.7 TD V6 out of a d3 with the slick auto.

Quote:

---

Originally Posted by butundede

Maybe a smaller motor, 2.7 TD V6 out of a d3 with the slick auto.

---

....the problem there is that they usually come attached to one of those disco 3 things....:p:wasntme:


jc

Quote:

---

Originally Posted by Dougal

Some food for thought.

The 4BD1T and 1HD-FTE have basically the same peak efficiency. ~210g/kwh at rated torque.
The displacement is within 10%.
So given the same fuel and air, the 1HD-FTE is going to deliver the same results. The increase in displacement and 4 valve per cylinder means it can deliver a fraction more airflow for the same boost.

So the only way a 1HD-FTE is going to deliver any more power is by spinning faster, which is where the efficiency drops and fuel burn starts to really suck.

At lower loads the 1HD-FTE with more internal friction (two extra cylinders) suffers an efficiency penalty and burns more fuel. My fathers 1HD-FTE cruiser has just done 200,000km from new and has never broken 10km/litre. Even when driven like the proverbial grandfather (the steering is too vague to drive it fast anyway).

So.
You want more go. You need more boost and more fuel to go with it. It's that simple. Changing engines ain't going to help much.
You'll also be looking at something better than the LT95.

---

Hmmm funny you should mention steering of the cruiser...I find every cruiser I drive (mostly utes) have terrible steering they don't feel direct and responsive like the rovers...they seem to have a lot of free play before the car actually moves and gets worse the faster you go.

You do like the sound of your old boys Tojo though don't you Dougal???? :D

6Bdt... Fit your box, sound nice, have smoother torque delivery so the box might survive, and have plenty of go... or rebuild your engine with larger turbo, dustbin of an intercooler and lighter flywheel so it'll rev and give it some legs at the top end like the newer diesels... Just my thoughts... :)

6BD1T will give it more go and it will drink more

The 1HD-FT in my old mans 80 pulling either the small 18ft 1500KG van or the 24ft 2500KG tajhmahal on tyres will happly put the diesel out the back at 17Lper100K tho a head wind will see it go up near 20Lper100K

My non turbo county pulled my rangie 1900KG+900odKG float along the flat would happly do 120kph tho back to 2nd on the real steep hills near sussex inlet and did roughly 13Lper100K

My TDI disco towing my camper trailer fully loaded plus loaded roof rack which was mainly wind resistance and unsure on weight of trailer could not hold speed in 5th and was happy to sit on 100K in 4th running 265x75x16 on standard gearing returned 13.8Lper100K

Tart up the 4BD1 maby fit a better rad so it dont get hot or try and scoop more air through the current set up and take in the sights cruising in a county wins hands down as long as the sound of the isuzu dosent bother you :cool: