Thread: diesel into P38

Neat enough, not much detail on how they made it work though.
I suspect it uses the Yota gearbox too.

Don't know about anyone else but I've never found a Japenese auto box I could live with.

Originally Posted by Hoges

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1KZ's are notorious head-crackers and not that good on fuel. If you are going to retrofit any engine, it has to be direct injection (stronger head, more efficient, better starting).

I'm struggling with the idea that a 3500 mazda will be more refined than a 4BD1T. The 4BD1T is a lot smoother and quieter than the older non turbo 4BD1.

Thought the idea of putting a Toyota diesel in was going just a bit too far.

I was thinking the 4BD1 was a bit crude based entirely on what I have read, the grubb has already suggested that the turbo is a whole different kettle of fish, and I am very happy to be told that, I am also lead to believe, again based solely on reading up, that the Rangie gearbox would be able to live with it, so if it works its the combination I would prefer.

That 1KZ with no intercooler would not be much better on fuel then the petrol engine it replaced. I like the way the Toyota setup not only makes no effort to cool the intake air but actually runs it over the engine twice to warm it that little extra.


Another thought. When a gear box is developed for a diesel engine, especially 4 or 3 cylinder, there is design/construction consideration into vibration that is uniquely created by a diesel at low rpm (due to high compression), 5 or more cylinders it’s not such a big deal. Many transmissions built for petrols won’t have these characteristics, and can shake to bits.

I learnt this the hard way about 10 yrs ago. I bought a boat for next to nothing with a buggered 5.0V8. I thought diesel conversion for my fishing rig, and built up a 1kz complete with all the electronics gone (mech injection), huge water/air intercooler, closed cooling – the works. The thing went like a train with 22psi of boost. However the old gearbox started to make a horrible rattle that quickly got worse. Took it down to the local merCruiser dealer who told me about the differences in petrol and diesel merCruiser drive units – all to do with vibration protection, essentially you can put a petrol in front of a diesel box but not the other way around. Crap I thought. Asked Dad’s neighbour who was workshop foreman for a large car dealership and he agreed, said same in cars… Stripped the drive unit and the top box had been shaken to bits.

Originally Posted by harlie

That 1KZ with no intercooler would not be much better on fuel then the petrol engine it replaced. I like the way the Toyota setup not only makes no effort to cool the intake air but actually runs it over the engine twice to warm it that little extra.


Another thought. When a gear box is developed for a diesel engine, especially 4 or 3 cylinder, there is design/construction consideration into vibration that is uniquely created by a diesel at low rpm (due to high compression), 5 or more cylinders it’s not such a big deal. Many transmissions built for petrols won’t have these characteristics, and can shake to bits.

I learnt this the hard way about 10 yrs ago. I bought a boat for next to nothing with a buggered 5.0V8. I thought diesel conversion for my fishing rig, and built up a 1kz complete with all the electronics gone (mech injection), huge water/air intercooler, closed cooling – the works. The thing went like a train with 22psi of boost. However the old gearbox started to make a horrible rattle that quickly got worse. Took it down to the local merCruiser dealer who told me about the differences in petrol and diesel merCruiser drive units – all to do with vibration protection, essentially you can put a petrol in front of a diesel box but not the other way around. Crap I thought. Asked Dad’s neighbour who was workshop foreman for a large car dealership and he agreed, said same in cars… Stripped the drive unit and the top box had been shaken to bits.

This was the issue I had with 4BD1T and ZF 4HP22 trans in my Rangie. BEST geartrain and engine match, really happy with it BUT goodnight to 3 transmissions in 25,000km...

JC

there is a shop at yatala, northern gold coast(bullet engines) they are called. they install big chev twin or supercharged v8 diesels for ,...... wait for it $29,000 fully engineered and ready too roll. the only thing is if taking off quickly, might strip the axles with the torque! very pricey , i know , but they might install other engines too. they have a website. bullet engines , ant road yatala. cheers

Originally Posted by MAGSY

there is a shop at yatala, northern gold coast(bullet engines) they are called. they install big chev twin or supercharged v8 diesels for ,...... wait for it $29,000 fully engineered and ready too roll. the only thing is if taking off quickly, might strip the axles with the torque! very pricey , i know , but they might install other engines too. they have a website. bullet engines , ant road yatala. cheers

I'm struggling to think of a worse engine to fit in anything. They are also lying about the torque. Chev 6.2 and 6.5 v8 diesels are easily beaten for torque by a 4BD1T or even tweaked td5.
Duramax is a completely different story, they are an isuzu and are single turbo.

If anyone mentions supercharged diesel, run the other way.

They do a pretty good job considering their naturally aspirated nature!

My old boy has a 6.5 chev and 4L60E in his defender. He destroyed the old R380 in less than 12 months driving like miss daisy. The thing pulls like a freight train at any revs!

It returns better fuel consumption figures than my P38!

I agree, anything Isuzu would be the go (except the dreaded engine that has the fuel injector pump triggered off the oil pressure), those engines are good, except when they are not working...

Correct me if I'm wrong about the fuel pump running off oil pressure too, I'm not completely familiar with that motor. It may be off the pump driven gear or something very similar...

Keithy