Turbo Fitment to 4BD1 in 110 County 88 with OEM aircon

**110Landy86** · 27th January 2011, 08:39 PM

Hey guys I’d firstly like to take the opportunity to say G’day to everyone!!! I joined the AULRO community a few months back now and in that time I’ve taken the luxury of sifting through the wealth of knowledge provided by fellow Isuzu loyalists, particularly those posts which relate to turbo installation

Having said that, all of my searches have failed to return any posts that discuss whether it is possible to install a turbo to 4BD1 while retaining the OEM air-con unit (specifically condenser). So with that I ask the brains trust the following:

Ø Is it possible to fit a turbo to an Isuzu 4BD1 while still retaining the OEM air-conditioner unit given that there is limited space on the exhaust side of the engine?

Ø If so, which exhaust manifold would be most feasible?

Ø Would I be required to fit a “raised” bonnet (as featured on the new defenders)?

Ø Can the engine bay accommodate a small intercooler?

I appreciate your response.

Cheers J

**rar110** · 27th January 2011, 09:08 PM

Bearman from the forum has a custom manifold with the turbo mounted fairly low on the driver side. The exhaust travels around the back of the motor over the top of the bell housing. The vertical oil filter is replaced by the standard twin filter so there is room for the turbo. This allow for the pass side aircon unit to remain. He recently posted some pics. A search will bring them up.

It goes very well, very neat setup.

**rijidij** · 27th January 2011, 10:38 PM

Have a look at JC's thread >>> The new tourer... <<< Reversing the turbo like this might give you enough room for the A/C unit, JC might be able to clarify how much space is left in there.

Cheers, Murray

**110Landy86** · 27th January 2011, 11:16 PM

Awesome thanks guys!

**110Landy86** · 29th January 2011, 01:35 PM

Thinking of fitting a Garrett 2560R turbo. Do you guys know if this turbo can be reversed as per justinc setup? If so is it a fairly simple job or does it warrant a technician?

Also, what is an ideal engine temp (mixed incline and cruise) relative to the OEM temperature gauge on the dashboard? Currently, the needle on the temperature gauge sits dead on half and rises to marginally over half way during range climbing or really pushing it at high speeds 120km with the a/c on. Is there some way of approximating the EGT temps based on the temp gauge and are these operating temperatures generally too high?

Cheers in advance

**bee utey** · 29th January 2011, 02:03 PM

Originally Posted by 110Landy86

Is there some way of approximating the EGT temps based on the temp gauge and are these operating temperatures generally too high?
Cheers in advance

Viz temperature, get an accurate gauge/engine monitor.
Viz EGT, why fuss? An Auber EGT gauge is cheap and easy to install:

Auber EGT

**Dougal** · 30th January 2011, 01:02 PM

Originally Posted by 110Landy86

Thinking of fitting a Garrett 2560R turbo. Do you guys know if this turbo can be reversed as per justinc setup? If so is it a fairly simple job or does it warrant a technician?

2560 is a T2 flange, the Isuzu manifold shown is a T3 flange. You will need an adapter plate.
I have a two piece design you can make yourself or Matt McInnes has one you can buy.

**isuzurover** · 2nd February 2011, 11:10 AM

Originally Posted by 110Landy86

Is there some way of approximating the EGT temps based on the temp gauge ...

No, not at all. Fit the auber EGT as mentioned.

I swapped my standard temp guage for a VDO guage and sender which has the temperature marked on it.

**110Landy86** · 24th February 2011, 06:03 PM

Thanks guys for your response. I've had a talk to mates at Cairns Land rover specialists. They have a resident 85 county with a 4BD1 incl. turbo (aftermarket). It seams as though it would be near impossible to fit a turbo to the 4BD1 whilst retaining the original aircon unit. That is not to say that it is impossible, however I'm starting to lean toward ditching the oem aircon unit and replacing with an aftermarket unit. This would allow for a relatively easy turbo fitment.

Also, following discussions with some motor savy mates of mine, it seams as though the general consensus is that provisions for an oil cooler and/or water supply line should be considered to ensure longevity of the engine.

What is the general consensus on this?

Thanks in advance

**isuzurover** · 24th February 2011, 06:13 PM

Originally Posted by 110Landy86

Also, following discussions with some motor savy mates of mine, it seams as though the general consensus is that provisions for an oil cooler and/or water supply line should be considered to ensure longevity of the engine.

As mentioned above, there are a few people who have turbos and have retained the AC.

The ISUZU has an inbuilt oil cooler on the RHS of the block. The two aluminium plates on the side. It does not seem to need additional cooling.

If you mean water cooling for the turbo, that is not needed on diesels. My turbo was water cooled on a nissan petrol, however I don't have the water cooling connected up.

As long as you keep the oil clean, the engine should be good for 500000-1000000 km, with or without a turbo.

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