isuzu 4db1 turbo manifold

[County]

Hi guys and girls,
I was wondering what is the best turbo msnifold to run on a 84 4bd1 diesel i have this part number 8-94119292-6 but won't to know wheater its the right one

Thanks Tom

[rijidij]

There are two different manifolds that I know of, the one with the horizontal mounting surface for the turbo and the one with the angled surface, I think this one is the one that will suit more (better ? ) turbos.

Cheers, Murray

https://www.aulro.com/afvb/images/imported/2014/03/537.jpg (http://s204.photobucket.com/user/rijidij/media/Isuzu%204BD1%20_%204BD1T/Isuzu%20conversion/4BD1_Manifold005_zpsba7bb448.jpg.html)

https://www.aulro.com/afvb/images/imported/2014/03/538.jpg (http://s204.photobucket.com/user/rijidij/media/Isuzu%204BD1%20_%204BD1T/Isuzu%20conversion/4BD1_Manifold003_zpse472724d.jpg.html)

[flagg]

This is the other type - it is higher and has the turbo level with the top studs. It has a T25 flange.

https://www.aulro.com/afvb/

(ignore the calliper)

Which one you choose I guess is down to what you can find and how you want to fit things in your engine bay. I have this later type as it lines the turbo up with my intercooler (and it was what I could find at the time).

While I have the later 'puma' style bonnet without the WTA intercooler over the head you can fit a turbo under the bonnet with the high type manifold.

[rar110]

I bought a batch of these a few years ago when I did my conversion. I'm going to off load the lot on eBay. PM me in the next week if your interested. I need to fund some repairs.

[County]

so what style do you have

[rar110]

Most are this type with the Garrett t25 flange. One has the split flange, which is the IHI type I think.

74684

[puma130tc]

Looking at those pictures, are there three possible factory turbo manifolds?
I'm currently in possession of the angled one and the upturned one with a split in it, the latter was looking like my best option for my current conversion, however the one in your picture without the split, looks like it has a different flange fitting.
Is it exactly the same as the split one, or does it differ slightly in one plane?

Ps. Sorry to but in!

[rar110]

Here is a better photo to compare the two:


74711

The T25 opening is probably slightly bigger overall. The IHI opening is slightly wider than T25 but narrower the other way.

[Dougal]

Looking at those pictures, are there three possible factory turbo manifolds?
I'm currently in possession of the angled one and the upturned one with a split in it, the latter was looking like my best option for my current conversion, however the one in your picture without the split, looks like it has a different flange fitting.
Is it exactly the same as the split one, or does it differ slightly in one plane?

Ps. Sorry to but in!

The t25 manifold was used on industrial 4bg1t and 4BD1T engines only. Absolutely no problems using it, but you won't find one on a truck engine.

The ihi bolt pattern is different. But you can slot the holes in t25 turbos to make them fit. That is what I'm running.

[rar110]

The t25 manifold was used on industrial 4bg1t and 4BD1T engines only. Absolutely no problems using it, but you won't find one on a truck engine. The ihi bolt pattern is different. But you can slot the holes in t25 turbos to make them fit. That is what I'm running.

Comparing the two:
• horizontally the holes appear to be spaced the same;
• vertically the holes are about 6-7mm closer together on the IHI type manifold.

[Dougal]

Comparing the two:
• horizontally the holes appear to be spaced the same;
• vertically the holes are about 6-7mm closer together on the IHI type manifold.

Yep.

[p38arover]

I should have taken some pics of the custom manifolds that KLR Automotive have made up for their Perentie turbo conversions.

Maybe I can the next time I go there.

[87County]

I should have taken some pics of the custom manifolds that KLR Automotive have made up for their Perentie turbo conversions.

Maybe I can the next time I go there.


Picture: (for about the 5th time :) ), exhaust pipe not in place

https://www.aulro.com/afvb/images/imported/2014/04/820.jpg (http://s708.photobucket.com/user/87county/media/4bd1turbo_zps6c1b1d91.jpg.html)

[87County]

The KLR manifold situates the turbo towards the rear, and therefore it enables more space across the top of the rocker cover for the pipe to clear the bonnet on a 110.

I guess if the later puma style bonnet was fitted this may not be so much of an issue, but the older type bonnet is strong enough to have additional potential uses (spare tyre, tools etc)

[Dougal]

I suspect KLR have done this solely to work with the orientation of their chosen turbo (it's not clockable with a cast WG bracket).

[p38arover]

I asked Brad about it this morning. It also allows a choice of turbos and simplifies pipe and hose routing.

[p38arover]

Here's a pic from KLR's website: KLR Automotive (http://www.klrautomotive.com.au/)

https://www.aulro.com/afvb/images/imported/2014/03/364.jpg

[Dougal]

Why are you showing such an interest in these Ron?

[p38arover]

Why are you showing such an interest in these Ron?

No reason. I often reply to threads I have no direct interest in if I can provide information.

But first the thread has to catch my attention. Many don't.

This one did because I saw a manifold being fabricated out of cast steel sections when I was there a couple of weeks ago.

[puma130tc]

Thanks for the photos!
The one on the right could be just what I'm looking for!
If you're interested in parting with it I'd certainly be interested.

[masmia]

When replacing an IHI on my Isuzu Rangie with a TDO4HL-19T, besides elongating the mounting holes, will the exhaust match up or is other work required?
Thanks in advance.
masmia.

[Dougal]

When replacing an IHI on my Isuzu Rangie with a TDO4HL-19T, besides elongating the mounting holes, will the exhaust match up or is other work required?
Thanks in advance.
masmia.

I run a slotted T25 housing on an IHI manifold and the ports match quite well. Not perfect, but quite well.
The TD04HL-19T you'll have to confirm for yourself.

It is however a bastard to do up the bolts. For this reason I plan to move the studs on my manifold to T25 pattern. This will involve removing the studs, plugging the holes and drilling/tapping in overlapping positions.

[p38arover]

I was at KLR Automotive today and saw the manifolds being fabricated. A lot of work.

[rar110]

That's a lot of work.

[flagg]

I feel for the poor guy on the linisher. They look nice, I'd be interested in the thoughts of a flow engineer.. when I looked into making turbo manifolds I was frightened off by the complexity of getting it right.

[juddy]

These kits look very good, whats the RRP for one?

[Dougal]

That's a lot of work.

Especially given the low cost and excellent flow of the factory manifolds.

[p38arover]

Especially given the low cost and excellent flow of the factory manifolds.

Agreed, but the reason for all the work is to really simplify the conversion. It puts the turbo in a better position.

[isuzurover]

Agreed, but the reason for all the work is to really simplify the conversion. It puts the turbo in a better position.

??? If the manifold is the one in the pic 87County posted then the turbo looks in the same position to factory. The turbine housing is a bit different in both pics but the crossover pipe is in the same spot.

https://www.aulro.com/afvb/images/imported/2014/04/820.jpg

http://i124.photobucket.com/albums/p29/isuzurover/LR_PICS/Sept-08-turbo-conv014.jpg

[p38arover]

If you compare the two photos, you'll notice the turbo on the KLR fabricated manifold sits back about 50mm further (maybe more). Not so obvious is that the turbo also sits lower.

[Dougal]

If you compare the two photos, you'll notice the turbo on the KLR fabricated manifold sits back about 50mm further (maybe more). Not so obvious is that the turbo also sits lower.

I think it's almost exactly the same spot.
The outlet flanges on both turbos line up with #2 exhaust port pretty well. So fore/aft is the same.
Vertically I also believe there is little difference. You are looking at two very different cross-over pipes which is why the angle of the compressor housing is different.

[isuzurover]

... Not so obvious is that the turbo also sits lower.

Both turbos seem to have a straight line between the air cleaner and the compressor intake, so this does not seem to be the case.

Either way it seems like a huge amount of work for little or no benefit.

[Ancient Mariner]

Some people like to do things thataway:angel:

[labrado]

This is the other type - it is higher and has the turbo level with the top studs. It has a T25 flange.

http://www.aulro.com/afvb/attachment.php?attachmentid=74509&stc=1&d=1395392271

(ignore the calliper)

Which one you choose I guess is down to what you can find and how you want to fit things in your engine bay. I have this later type as it lines the turbo up with my intercooler (and it was what I could find at the time).

While I have the later 'puma' style bonnet without the WTA intercooler over the head you can fit a turbo under the bonnet with the high type manifold.
Has any member used this type of manifold in their perenties? Do you need to cut a hole on bonnet? I'm sourcing an exhaust manifold from CHINA, and have found this type for about 40 AUD. I haven't found the one mentioned by Murray so far.:(

Thanks
Wei

[labrado]

Has any member used this type of manifold in their perenties? Do you need to cut a hole on bonnet? I'm sourcing an exhaust manifold from CHINA, and have found this type for about 40 AUD. I haven't found the one mentioned by Murray so far.:(

Thanks
Wei
Found the answer in this thread http://www.aulro.com/afvb/isuzu-landy-enthusiasts-section/167900-not-so-budget-turbo-install-11.html.

Many thanks to Flagg.:D