a 1997 Omani diesel 80
- Thread starter John Young
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- Thread starter
- #42
I picked up the Omani Diesel today to use as a daily driver. I think she needs the heavy duty transmission now. You have to be judicious getting into second.
We have the new Terrain Tamer springs and suspension items arriving on Friday; then the truck can get up to a normal height.
We have the new Terrain Tamer springs and suspension items arriving on Friday; then the truck can get up to a normal height.
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how's the power increase feel?
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- #44
It is not there yet. I definitely feel a boost above 2K RPM but power below is not where it needs to be. The guys are saying it may be because of some of the functions that need to be implement such as a fuel restriction when you are at the end of the steering travel--or maybe the fuel restriction is there all the time. I'm not going to push it and it will be going back in for the Terrain Tamer items.
Nice. Look forward to seeing the continued progress.
I just sourced a 96 1HZ with aftermarket turbo from the GCC.
I just sourced a 96 1HZ with aftermarket turbo from the GCC.
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- #46
That's a beauty!
I so prefer the 80 without all the plastic on the side! The Omani is going to get all that deleted when we get to the physical renovation. Did the seller tell you how much boost is on that 1HZ? I have a turbo kit going on my 1HZ pickup that is very conservative, meant for professional vehicle installation.
BTW, the Omani has developed a severe Death Wobble exactly the same as this AUS 80.
All the Terrain Tamer goodies are coming this week, including new springs, bushings etc. selected to account for the extra weight of the winch in front. I'm not trying to fix, just staying below 60kph until the truck goes in next week.
I so prefer the 80 without all the plastic on the side! The Omani is going to get all that deleted when we get to the physical renovation. Did the seller tell you how much boost is on that 1HZ? I have a turbo kit going on my 1HZ pickup that is very conservative, meant for professional vehicle installation.
BTW, the Omani has developed a severe Death Wobble exactly the same as this AUS 80.
All the Terrain Tamer goodies are coming this week, including new springs, bushings etc. selected to account for the extra weight of the winch in front. I'm not trying to fix, just staying below 60kph until the truck goes in next week.
No idea on the boost. I purchased from a broker who didn't know. He had already replaced all the bushings and trailing arms, etc...I'll find out more when I get it into a good mechanic. No death wobble, very tight at 70mph+ and plenty of power for this manual 5spd. I have extensive undercarriage and suspension pics, let me know if you want to see anything particular?
- Thread starter
- #48
I'm glad you started a thread on the truck. Always interested in another manual diesel 80!
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- Thread starter
- #49
The guys are about to get to serious work on the Omani and try to sort out the power issue--and also the truck is getting pretty much an entire new Terrain Tamer suspension:
This is actually a set of parts for the Omani and for Mister Blue, the 2003 diesel 105 that we really have not started on yet.
This is actually a set of parts for the Omani and for Mister Blue, the 2003 diesel 105 that we really have not started on yet.
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- #50
It has been a while since I last updated this. The Omani Diesel has taken a back seat to the Holy Truck (a petrol 80) because I am trying to ready the Holy Truck for shipment to Florida. Part of that was trying to figure out where we went wrong on the Terrain Tamer springs for the rears of the two 80s. Mister Blue, the 105 was just fine. Turned out we had ordered the 'comfort progressive' springs for the 105 but the 'heavy duty progressive' for the two 80s. The heavy duty springs were just too much without a heavy permanent load in the 80s. We've now ordered the comfort progressives for the 80s.
Anyways, the Omani Diesel is operable and the guys have been tuning the boost on the 24 valve turbo diesel.
I took The Omani Diesel for the weekend to kind of assess where we are with the truck. Here are my observations:
The thing takes some getting used to in terms of driving. All the power is between (yesterday at least) 2 and 3K RPM. Requires a different style of driving. But it is very nice on the highway, and in a short loop I measured it at 7.6 km/liter or 17.9 MPG. Might be a few percent off, but I LOVE that fuel economy, even if diesel is more expensive. Stop and go traffic is not a joy because of the short power bands and the way it is geared, but Its not meant to be a commuter. And when that turbo comes on, it is a well-behaved hoot!
As mentioned in the video, the EGT gets up to about 625C with .72 bar of boost if you gun it on the highway. This is 1150F and 10 PSI, which is just fine. Factory is 7 PSI on this HDJ81, and you really have to gun it to get up to that 10 PSI. The power drops off about 3500 RPM, but again, I kind of expected that, and it is a really nice feel on the highway.
Lots of squeeks and rattles in this old truck, but we have not even begun to look at the inside of the truck, where most of this seems to be from.
Anyways, the Omani Diesel is operable and the guys have been tuning the boost on the 24 valve turbo diesel.
I took The Omani Diesel for the weekend to kind of assess where we are with the truck. Here are my observations:
- The truck pulls to the right and the wheel is off by one spline I think.
- The turn signal does not return to center in a turn
- The wind noise is pretty bad with that rack on it.
- It feels a little top heavy, but I think that is the rack. With the softer springs from the 105 it felt better and It did not feel squirrely to me, or at least not that I could tell
- The back door latches need adjustment--they don't close properly and the door ajar warning is on intermittently
- And maybe the oddest thing... It feels like one of the brakes is on slightly. On level ground it comes to a halt just a little too fast when the clutch is out
- I think there may be something off on the tach. Yesterday I was on the highway and going 100kph indicated (about 98kph actual) and the RPM was showing about 2400 I think, and the turbo would kick in between 2K through 3K RPM. Today it is reading about 400 RPM lower than that. Which I don't get because this thing is digital. Idle is indicating at 400 RPM and it sure does not sound like 400. We need to verify the tach.
The thing takes some getting used to in terms of driving. All the power is between (yesterday at least) 2 and 3K RPM. Requires a different style of driving. But it is very nice on the highway, and in a short loop I measured it at 7.6 km/liter or 17.9 MPG. Might be a few percent off, but I LOVE that fuel economy, even if diesel is more expensive. Stop and go traffic is not a joy because of the short power bands and the way it is geared, but Its not meant to be a commuter. And when that turbo comes on, it is a well-behaved hoot!
As mentioned in the video, the EGT gets up to about 625C with .72 bar of boost if you gun it on the highway. This is 1150F and 10 PSI, which is just fine. Factory is 7 PSI on this HDJ81, and you really have to gun it to get up to that 10 PSI. The power drops off about 3500 RPM, but again, I kind of expected that, and it is a really nice feel on the highway.
Lots of squeeks and rattles in this old truck, but we have not even begun to look at the inside of the truck, where most of this seems to be from.
Has anyone looked upstream on the fuel system on the diesel?
Make sure the pickup in the tank isn't obstructed.... also what size fuel feed line is running from the tank forward?
I was told to run 1/2" all the way from the pickup inside the tank forward to the IP when swapping in an ft into a gasser just to be safe.
Make sure the pickup in the tank isn't obstructed.... also what size fuel feed line is running from the tank forward?
I was told to run 1/2" all the way from the pickup inside the tank forward to the IP when swapping in an ft into a gasser just to be safe.
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- #52
The Omani started life as a 1HZ diesel so the fuel lines all should be fine. That is, unless they are obstructed like those in the Holy Truck.... Thank you for mentioning this.
AussieHJCruza
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The 1HZ fuel lines are potentially too small - Toyota changeed to 12mm lines for the turbo diesels in about 11/92 to resolve a surging issue.
Also sounds like she needs the boost compensator adjusted, an FT will pull well below 2k rpm with a free-flowing exhaust and properly adjusted compensator.
Also sounds like she needs the boost compensator adjusted, an FT will pull well below 2k rpm with a free-flowing exhaust and properly adjusted compensator.
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- #54
Thank you Aussie! That is just the kind of info I was hoping to attract. I so so appreciate Mud and help like what you just provided. Thanks mate!
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- #55
It has been a long time since I have updated this thread. Basically the Omani 80 has been getting some needed service love. And somehow another year has passed so it is time for inspection. And by now the tires are too old to pass, so I decided to change to Kumho AT52's in 285/75R16 on powder coated rims
I love the very square profile of the AT52
Turned out it was WAY out of alignment:
The plan is that in a few months we will start the cosmetics. I will be removing the fiberglass fender flares as part of that. I like the cleaner look without.
A friend who has just started a LC-focused garage helped me quite a bit with the tires and alignment. I am looking forward to seeing what he can do with the Omani Diesel. He is very meticulous.
I love the very square profile of the AT52
Turned out it was WAY out of alignment:
The plan is that in a few months we will start the cosmetics. I will be removing the fiberglass fender flares as part of that. I like the cleaner look without.
A friend who has just started a LC-focused garage helped me quite a bit with the tires and alignment. I am looking forward to seeing what he can do with the Omani Diesel. He is very meticulous.
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- #56
I had been noticing a little drag after coming to a complete stop in the truck. Felt like something was sticking. The owner of the shop that took care of the tires concluded that the brake pedal was slightly depressed. And I think I had noticed this before but had forgotten about it.
I'm fairly obsessive about fuel consumption and had been seeing higher than expected in the last few fill ups; here's what most recently saw: 400 km on 59.51 liters or 15.8 MPG.
I decided to use a 'field expedient' approach to the depressed brake pedal: a bungie cord:
And then I did a 100km loop and got a fill up. Gas mileage materially improved: 100 km loop on 13.48 liters, or 17.4 MPG. This is much more like what I had been expecting to see based on experience with the two 105's and this truck before the engine transplant.
I think the truck looks very nice on the new rims and rubber too.
I'm fairly obsessive about fuel consumption and had been seeing higher than expected in the last few fill ups; here's what most recently saw: 400 km on 59.51 liters or 15.8 MPG.
I decided to use a 'field expedient' approach to the depressed brake pedal: a bungie cord:
And then I did a 100km loop and got a fill up. Gas mileage materially improved: 100 km loop on 13.48 liters, or 17.4 MPG. This is much more like what I had been expecting to see based on experience with the two 105's and this truck before the engine transplant.
I think the truck looks very nice on the new rims and rubber too.
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- #57
It turned out that the pedal problem was a leaking brake booster. We got a new one of those installed and the Omani acted much better.
I am getting more serious about this truck. I just sent it in for body and paint. Full treatment, the same as for the Holy Truck (which I am way behind on in terms of posting about here).
The truck is at CSX Motorsports here in Dubai. They did such an excellent job on the Holy Truck that I asked them if they could do the Omani. They got going immediately on the work.
I have decided to delete the radio antenna. The one on there does not work well and I cannot remember the last time I listened to FM radio. I think it looks better without.
I also am removing the freshly powder-coated roof rack. The thing is noisy and it is pretty heavy making the truck just a tiny bit wobbly. Hopefully I will find someone who wants the roof rack.
Here I am. The weather is much nicer now in Dubai. It only gets to the low 90s.
I am getting more serious about this truck. I just sent it in for body and paint. Full treatment, the same as for the Holy Truck (which I am way behind on in terms of posting about here).
The truck is at CSX Motorsports here in Dubai. They did such an excellent job on the Holy Truck that I asked them if they could do the Omani. They got going immediately on the work.
I have decided to delete the radio antenna. The one on there does not work well and I cannot remember the last time I listened to FM radio. I think it looks better without.
I also am removing the freshly powder-coated roof rack. The thing is noisy and it is pretty heavy making the truck just a tiny bit wobbly. Hopefully I will find someone who wants the roof rack.
Here I am. The weather is much nicer now in Dubai. It only gets to the low 90s.
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- #58
The hood is good.
The foreman at CSX showed me that the front fenders are a little beat. They easily can beat them back into shape but he suggested that if I could find fresh fenders that would be a better way to go.
What is really marvelous is that these guys have the skill to do this hand panel beating. And that they are taking the skins off the chassis and down to the bare metal. This would be really hard to get done in the US.
The foreman at CSX showed me that the front fenders are a little beat. They easily can beat them back into shape but he suggested that if I could find fresh fenders that would be a better way to go.
What is really marvelous is that these guys have the skill to do this hand panel beating. And that they are taking the skins off the chassis and down to the bare metal. This would be really hard to get done in the US.
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- #59
The foreman also asked if I could get this piece of front trim:
These always seem to get a bit beat up, and they are thin metal so repairing them is pretty hard. I whatsapped a friend in Sharjah and he has a good replacement off a JDM truck. He also had a pair of good fenders so I will pick those up too and bring them to CSX.
These always seem to get a bit beat up, and they are thin metal so repairing them is pretty hard. I whatsapped a friend in Sharjah and he has a good replacement off a JDM truck. He also had a pair of good fenders so I will pick those up too and bring them to CSX.
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- #60
Looking at this I realize I have not updated this thread in a very long time, and a fair amount has been happening.
For one thing, I forgot to mention it now has a brand new stainless exhaust. The first iteration we did just was not that great so we did a redo. The below are a little out of sequence because we did the exhaust before it went in for paint and body, but I thought I would share it.
at a high end shop
For one thing, I forgot to mention it now has a brand new stainless exhaust. The first iteration we did just was not that great so we did a redo. The below are a little out of sequence because we did the exhaust before it went in for paint and body, but I thought I would share it.
at a high end shop
