Thread: isuzu turbo

If my memory serves me well the original Isuzu in Countys was the 4BDI.
That in the turbo 6WD jobbies was the 4BDTI .. or something similar.

The turbo job, as I understand it had a heavier crank + stronger all the other usual stressed bits.

Hence to my point, merely blowing a non-turbo model may well lead to grief and many wasted ching chings.

Cheers

here are some ideas to generate some thought-
btw, i know jack about desiels.

-heaps of good, cheap 2nd hand import turbos around but they are off petrol motors. i dont know if there is any design differences between the two.

-why not be different and supercharge it? still cheap for the blower
and you wont have to worry about finding turbo exhaust manifolds.

-lpg boosting. this looks good.

-do all of the above [img]style_emoticons/<#EMO_DIR#>/biggrin.gif[/img]

-i would have thought the way diesel donks are built, that they are all plenty strong in the bottom end. ??????????

The 4BD1-T dose have a nitrided crank. coated pistons, oil squirters for cooling, and a bigger oiler cooler.
But the Isuzu 3.9 is an extreamly over engineered donk, and can easily take the extra power that the turbo dishes out.
I have a few friends that have turboed their N/A engines with no problems at all.
The factory turbo's on the 4BD1-T were a Garret and only produced 5 psi hence why they had no wast gate.

Hope this answers a few Q's for you, and good luck with the mod. You'll never look back!

Cheers Larns

As far as turbo's from petrol motors. Look for a Mitsubishi turbo from a WRX. I am looking for one at the moment for my 4BD1 and I know a few people who have used them with great results.

Most diesel mechanics will say you need to rebuild the motorwith different pistons, sleeves, crank, etc to make it into a turbo. Cost $5 or 6000. Big investment.

However, I have heard of quite a few 4BD1s being turboed without a rebuild. That is with little more than a new exhaust manifold, turbo and air crossovers.

Garrett will give you a bigger boost, about 25% increase in power to about 95kw. I priced a new turbo though Garrett Sydney at $1500. Sweitzer (check spelling) will give you a lesser boost but will cost less, about 15% increase in power to about 75kw. I priced a complete kit for a Switzer turbo at $2500, ie new manifold, turbo, pipes etc.

An alternative is to buy an imported 4BD1T (about $4000 - but you exchange your motor), or one from an older wrecked NPR Isuzu truck, or buy a more modern diesel with more power and less emmissions eg a 4HF1 Isuzu.

good luck negotiating this maze. I gave up.

See previous replies - if doing this (and I have thought about it, but my engine has only done 400,000km, so it will be a while yet) I would be inclined to go the route of an imported 4BD1T as being the simplest.
One point worth mentioning is that if you have factory airconditioning, you probably don't have room for a turbocharger.