pele
Isuzu Baby
Posts: 8
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Post by pele on Jul 15, 2008 3:09:19 GMT 11
Greetings,
I'm in the United States (Virginia), where I own a 1996 Honda Passport. This is a renamed Isuzu Rodeo, which I believe is either the Wizard or the Mu in other parts of the world.
I currently have the 3.2 Single Cam V6 in the truck. I am considering removing it and fitting a 3.1 4JG2T Diesel in for the benefit of being able to use home brewed BioDiesel.
We don't have any vehicles with this engine, so test driving one will be tough. I would like to know how the two engines compare, drivability wise.
Has anyone had experience with two similar vehicles, one Petrol, one Diesel? How does the diesel drive compared to the petrol version?
I will be using the 5 speed transmission with 4x4 gearbox that comes with the Diesel, unless my existing transmission is the same. (I don't know the diesel gear ratios.) I will also be keeping my final drive unless the Diesel version is different. I have the 4.3 with G80 stock limited slip unit.
The engines that I see from the import companies indicate that they may have come from a BigHorn/Trooper. Will these engines fit, or should I specifically look for a block that has come from a Wizard/Mu?
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Post by geeves on Jul 15, 2008 7:14:19 GMT 11
Dont know anyone that has done this conversion but thee shouldnt be too many problems. The 4jg2 engine is extremly rare in USA though so any parts could be an issue.
This motor was fitted to Bighorns,Mus and wizards and is a good motor. The only differences Im aware of is that the bighorn version is intercooled (top mount and needs a scoop) and the gearbox mount uses a different crossmember.
Later 4jg2 engines had electronic control of the injector pump. It might be easier to avoid these as it adds more wireing hassels
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pele
Isuzu Baby
Posts: 8
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Post by pele on Jul 15, 2008 21:57:21 GMT 11
I was considering swapping in a 4BD2T from an Isuzu Elf truck (Called the N series here, IE NPR.) due to good parts availability. Although fitting a 3.9L 750 US LB (340 Kg) engine into this truck might prove a bit difficult to say the least.
I've found that the 4JG2T has been used in industrial equipment, IE Generators, water pumps, air compressors and the like. Only the cam timing and injection pump are set for operation at one fixed speed... Should be a good source of repair parts like seals, bearings, timing belts, and internal parts.
It also might be found in forklifts and construction equipment which would give me a controllable injection pump...
To say this engine is rare in the automotive field is a gross understatement; It's almost non-existent. When I purchase one, it will be from a Japanese importer on eBay. However I believe there is a source of parts that should be consistent enough to support me. I just need to plan my maintenance accordingly. (I usually keep spare parts around for my vehicles.)
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Post by elysian on Jul 21, 2008 18:51:26 GMT 11
Is the 4JB1t a common engine in the US ? admittedly it's the 2.8L motor .. but just as good as the 4JG2T .. and with the current fuel prices.. anyway.. just an idea / alternate option / etc =)
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Post by geeves on Jul 21, 2008 19:40:46 GMT 11
As you are staying 5 speed and as you have a rodeo sized wagon instead of the larger Trooper the 4jb1t might be the way to go. Its a higher reving engine than the 4jg2 so would be more suited to your gear ratios. Also being direct injection its more economical. In a Trooper2 body with 5 speed 8.3 liters per 100km is a common economy figure for highway cruising. In English this is 33mpg but US gallons are smaller. In Mus you can get 8l/100km and this will be achievable without too much effort.
With only mild tuning from standard which doesnt effect economy you can still have 31 inch tyres complaining off the mark with the 4.3 ratio.
The only common diesel in USA was the c223t which was a good engine but there are a few repowers documented with the 4jb1 All say far better power and economy. This engine was made under licence in Brazil untill very recently so this might be a good source
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pele
Isuzu Baby
Posts: 8
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Post by pele on Jul 22, 2008 10:36:33 GMT 11
Ah, there are very many engines of this sort on eBay, so I can get either 4JB or 4JG type engine. (With it's associated transmission and 4wd gearbox)
Fuel economy is not of high high concern for me, as BioDiesel fuel can be created by using Caustic Soda and Methanol in a chemical reaction with old restaurant cooking oil. It's a bit complex, but there's a process that creates a fuel suitable for use in a diesel engine and the process doesn't require any modification of the engine.
This low cost, homebrewed fuel is the main reason I would like the Diesel engine. I would just not like to sacrifice too much power in the process.
There are almost NO Diesel engines native in the United states aside from Ford F350's and other large trucks. Or VW/Mercedes Benz. (I have a relatively low opinion of German vehicles.)
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Post by geeves on Jul 22, 2008 15:25:01 GMT 11
Generl consencus is that biodiesel has a higher output than mineral diesel.
The 4jb1t should do 84kw and the 4jg2 92kw Your v6 should be in the region of 130kw but diesel power is different to petrol so actualy works better than the numbers show. You wont be hooning down the road at 100mph any more but you wernt doing that in a 4x4 anyway. Put a trailer on the back though and leave the petrol for dead every time.
I know you dont like German cars but the current VW Golf is a good example. The diesel has 10% less KW but faster 0-60 and about 40% less fuel use
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pele
Isuzu Baby
Posts: 8
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Post by pele on Jul 22, 2008 23:07:06 GMT 11
Generl consencus is that biodiesel has a higher output than mineral diesel. The 4jb1t should do 84kw and the 4jg2 92kw Your v6 should be in the region of 130kw but diesel power is different to petrol so actualy works better than the numbers show. You wont be hooning down the road at 100mph any more but you wernt doing that in a 4x4 anyway. Put a trailer on the back though and leave the petrol for dead every time. I know you dont like German cars but the current VW Golf is a good example. The diesel has 10% less KW but faster 0-60 and about 40% less fuel use Do you have Transmission Gear ratios available for a Bighorn/Trooper with 3.1 Diesel? I want to see how different they are compared to my Petrol gears. Again, this might seem like basic stuff, but we never got that engine here. We had two engine options in the Isuzus of this year... 2.6L I4 (4ZE1 engine code) and my V6... Both petrol.  |
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Post by geeves on Jul 23, 2008 16:18:33 GMT 11
There are 2 possible gearboxes in the mua range. I dont know which is which.
MUA 5C ranges 3.767,2.248,1.404,1.0,0.8909 and 3.873 reverse
MUA 5S ranges 4.357,2.502,1.501,1.0,0.809 and 3.970 reverse
low range for both is 2.050 high is 1
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pele
Isuzu Baby
Posts: 8
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Post by pele on Jul 23, 2008 22:29:37 GMT 11
There are 2 possible gearboxes in the mua range. I dont know which is which. MUA 5C ranges 3.767,2.248,1.404,1.0,0.8909 and 3.873 reverse MUA 5S ranges 4.357,2.502,1.501,1.0,0.809 and 3.970 reverse low range for both is 2.050 high is 1 Excellent. I like the ratios on the "S" version. The lower 1st and the higher Overdrive make it look very versatile for both offroad and highway use. The low range gears will be replaced with a 3:1 setup. This vendor is very close to where I live and others have dealt with them and enjoy their product. id211.chi.us.securedata.net/independent4x.com/merchantmanager/product_info.php?cPath=68_69&products_id=232Is there any way to identify the transmission? Perhaps a nameplate or casting number on the housing? |
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Post by geeves on Jul 24, 2008 7:22:22 GMT 11
Its on the vehical id plate on the firewall but you wont have that whith the new engine. It is stamped on the gearbox somewhere but dont know where. If you have the box out you could select first gear and turn the shaft by hand counting the output
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pele
Isuzu Baby
Posts: 8
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Post by pele on Jul 24, 2008 7:46:39 GMT 11
Its on the vehical id plate on the firewall but you wont have that whith the new engine. It is stamped on the gearbox somewhere but dont know where. If you have the box out you could select first gear and turn the shaft by hand counting the output Do you know the option code for it? (IE I know the option code for the Limited Slip rear differential is G80.) Also, if anyone needs the ratios for the petrol model, according to my owner's guide, they are: Rvs - 3.873 1st - 3.767 2nd - 2.248 3rd - 1.404 4th - 1.000 5th - 0.809 Low Range - 2.283 Rear Axle - 4.300 Identical to the 5C model above, aside from the 5th... Could that be a typo? Could be possible that the 5C model comes with petrol engines and the 5S comes with Diesel models... |
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Post by geeves on Jul 24, 2008 10:00:17 GMT 11
8909 is a typo sorry. both boxes have same 5th
You could be correct as to which is which but I would of thought the wider spread of ratios in the s box was more suited to the petrol. It could also be due to the year
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pele
Isuzu Baby
Posts: 8
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Post by pele on Jul 25, 2008 2:50:43 GMT 11
8909 is a typo sorry. both boxes have same 5th You could be correct as to which is which but I would of thought the wider spread of ratios in the s box was more suited to the petrol. It could also be due to the year Cool. So worst case scenario, I have a spare transmission. Do you know the clutch diameter? Possibly the clutches are the same size... That's one spare part I can get locally. I might even be able to get an engine alone without the transmission and save on freight cost. This is shaping up to be a fairly bolt in swap. Does anyone have an engine removed from their Mu/Wizard/BigHorn? I'd like to see some pictures of the mounts. |
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