Dougal

Those EGT are unrealistically low. Do you have a probe that's in a cold location, too short or even post-turbo? IDI engines put a lot of heat into the heads (which is why they crack). The cooling loads on a 1HZ are a lot higher than a 1HD-T...

1hz & 1hd if them both are the same. Then ur are telling people that is waste of money and time for 1hd?. A simple 10psi boost result on both engine speaks different result in performance and reliability. To say a 1hz that will never overheat...

One of the biggest things I appreciate about the Mud community is the perspectives and knowledge that is provided from members around the world. One of the difficulties when talking about diesel fuel and additives is the difference in fuel...

The pumps on the 1HD-FTE's seem to do 400,000km without any dramas on the ULSD we run here. I wouldn't be overly concerned about the FT.

Here's a 45ish to 65 accelerate, again not full mashing it, probably around 1/2 throttle. This is just a 4th gear pull. The only other mods I have done, is the fuel screw has been turned up for a couple years maybe 1/2 turn, and the timing...

@Dougal Big holset comp vs what I think is a 19t And the turbines, big he221, small he221, td04hl

Fascinating results. Shame you can't overlay boost on the graphs. Have you seen a change in boost response? If you want to make a big change in your turbo. Get one with a newer generation turbine wheel...

So, my friend and neighbor Igor followed in my footsteps and implemented the split intake manifold and swirl flap project on his 1HD‑FT. Unlike me, Igor really loves measuring the results of his mods on a dyno, which gives us a chance to see the...

Several of the studies aren't even from a US company. Neste is a finish firm. I've owned a diesel since 2002 so while I'm not as old as some I do have some experience.

Those were all from the same website, but they're from seven different sources, if you go to that website there is a stack of studies all from different people, you can try to disregard it all you want but at least have an open mind. It was not...

https://saemobilus.sae.org/papers/lubricity-california-diesel-fuel-981362?utm_source=chatgpt.com https://saemobilus.sae.org/papers/lubricity-low-sulfur-diesel-fuels-932740?utm_source=chatgpt.com...

There are stacks on stacks of studies that disprove this.

1HZ will run on 25% water. It's the least sophisticated injection system around. Doesn't need additives. If you get caught with a tank of summer diesel headed into winter. Sure you might need some anti-gel. I've added petrol to diesel to...

The only things a tune can do to help spool is over-fuel and retard timing at that rpm. If you're at sea-level you can get away with it. If you try to tow or climb hills it just gets hot and smokey. If you spend any significant time driving in...

This 100%. If your turbo doesn't make boost at low RPM there's nothing a new tune can do to give you more off the line. It will just over fuel and run hot until you get the engine spinning fast enough for the turbo to kick in. Your money will be...

The dead spot will be lack of boost. The only way to fill that is a more active turbo.

A GTX2871R is going to be a high rpm turbo and not going to give the low rpm boost that diesels need. Probably not much different down low to stock. Maybe even worse. A better turbo is the answer.

Isuzu parts supply in the US is no problem at all. The engine was used in Isuzu and GM badged trucks, either dealer network has you covered. Biggest hassle with the Isuzu is gearbox adaption. Worth asking.

Are you planning on keeping the stock auto transmission? I recently drove a 75-series Troopy with an Isuzu 4BD1T and was very pleasantly surprised by the power and hill climbing ability of the engine. It was stock with somewhere around...

That's my experience with other diesels too. A client of mine has a JCB industrial diesel powering a water pump. Thing runs over 30psi boost stock. During install the pump was never lined up with the motor correctly and the resulting vibration...

You're unnecessarily wrapping it in cotton wool. I had a 1hdt powered 80. I pushed it to 750-800⁰c egt on the regular. Occasionally I would see 900⁰c I was running at around 18psi boost. As for revs, a diesel is happy to rev. They are a slow...

That makes total sense, both from a service standpoint and for the aftermarket support. An NV4500 would be awesome, getting rid of the power sapping auto will transform the driving experience. It will also make wheeling more engaging and exciting.

You'll need a different injection pump to get a road engine governor. Here is a thread listing everything you need for different clean and safe power levels in a 4bt: https://www.4btswaps.com/threads/power-recipes.94929/

Yes it would.

Just wrapping this thread up, four new OEM injectors solved the issue, no more rattle.