VNT Turbo and Performance Mods - 300 Tdi

**Jock The Rock** · 23rd January 2010, 08:28 PM

Gday

Well I finally got round to fitting up my new turbo this afternoon

This is what I have bought so far, and the following photos will show how it is done

for any who are interested that is.

I bought this in a kit from the UK, all I can say is do it. Everything you need comes in the kit; all you have to do is bolt it on and follow the instructions

So here goes...

The new turbo (Garrett GT22V):

New 200 Tdi Manifold:

The little bits that make up the kit:

The old ready for removal:

Bare slate ready to start again:

Manifold, new studs and oil hoses on; intake hose extended:

Turbo on

Plumbing almost finished:

All done:

Tips:
Bolt the oil drain hose onto the turbo then lower the turbo into place and bolt on
When shortening the intake hoses use a flat wheel to smooth up the edges of the rubber, makes it look snazzy
There'll be more I can't think of any at the moment

After I fired it up and took it for a spin down the road I was disappointed. I didn't think this was a worth the money I paid for it. Driving home from the workshop it was awesome down low, but up high I was struggling to hold 110.

I feel I gained lots of initial acceleration, but then it dies and hits a flat spot.

I reckon this is to do with a restriction caused by the standard exhaust. So.. 3" will be on next week hopefully

Bigger intercooler is on order should be here next week, so I'll be able to wind the fuel up a little. The intercooler should keep the EGTs in check

I reckon I'll get hold of a performance head from the UK and bolt that on as well

After that I'm tossing up an Air-Water setup, there's a fella here in Launceston who makes custom alloy radiators/intercoolers. He owns a 300 Tdi Disco with his own setup and that thing flies. He is also keen to find a market for Landrover specific air-water intercooler setups. I have put him onto this forum and he should be on sometime

At the end I plan on handing it over to a turbo specialist for a nice tune up and tweek

I'll keep you posted on the engine mods as the come in

Hope this helps some people

**justinc** · 23rd January 2010, 08:43 PM

Hi Jock,

Looks the goods, I'll be fitting one soon too, so you'll be the guinea pig

As regards the disappointing performance, I reckon you'll need more fuel. Lots more, as these can easily and quickly flow 20Psi

Like we talked about earlier, wait til the pyro is on then go for it

Good job

JC

**Jock The Rock** · 23rd January 2010, 08:59 PM

Originally Posted by justinc

Hi Jock,

Looks the goods, I'll be fitting one soon too, so you'll be the guinea pig

As regards the disappointing performance, I reckon you'll need more fuel. Lots more, as these can easily and quickly flow 20Psi

Like we talked about earlier, wait til the pyro is on then go for it

Good job

JC

Just make sure you bolt that bottom oil drain hose onto the turbo and trim the flexible hose off to the right length; then lower the turbo into place. I learnt the hard way and had to pull the turbo off again

Yeah they do spool up very quickly a lot quicker than standard. I had a play on some gravel at work and it will wheelspin with a dab of throttle on take off

I did notice it didn't blow anywhere near as much smoke as well, so I guess thats a sign on the fueling too

Have you heard of Rob Lupo?

Thanks

**HBWC** · 23rd January 2010, 11:35 PM

i soon plan to do the same but im diching the air to air and converting the intake manifold to a water to air intercooler for even less pressure drop

also have you moved your air intake??

**slug_burner** · 24th January 2010, 01:43 AM

Looks the goods.

About the trouble holding 110 km/h. If you could do it before I don't think that a 3" exhaust is going to help. I would look at the diaphragm controlling the vanes in the turbo, they may not be opening the vanes enough at higher gas flow therefore causing too much back pressure. This could be a trade off between lower gas flow small opening of the vanes and the bigger opening required the higher gas flow.

**Michele** · 24th January 2010, 03:01 AM

Originally Posted by Jock The Rock

(...)
I bought this in a kit from the UK, all I can say is do it. (...)
New 200 Tdi Manifold:

I'm quite sure you bought the same kit I have.
If so, that's a genuine, brand new 2.8 Powerstroke manifold.

Sorry to hear you're not fully happy (yet) with it.
I'll have to wait another week before fitting mine (hi-flow intercooler is being made in UK at the mo), I look forward to following your progress.

Couple of things:
1)did you have to modify the intake hose as per instructions?
I got hold of a kit for a mate first, and everything went in place keeping the hose as it is, no fuss.
2)are you planning to fit an EGT gauge?
The plate on the factory setup is very handy, I'm still wondering where to plumb the future sender with the new VNT...

My mate is very happy with this conversion, I heard from other pals from UK and they're very happy too, seems like the Tdi "go like rockets now", most of them are still fine tuning with boost pressure and fuel pumps though.

**Jock The Rock** · 24th January 2010, 08:49 AM

Originally Posted by hillbilliywheelchair

i soon plan to do the same but im diching the air to air and converting the intake manifold to a water to air intercooler for even less pressure drop

also have you moved your air intake??

Air intake is still in the same spot, but it has an extension just behind the motor and the end is shortened a little bit

Originally Posted by slug_burner

Looks the goods.

About the trouble holding 110 km/h. If you could do it before I don't think that a 3" exhaust is going to help. I would look at the diaphragm controlling the vanes in the turbo, they may not be opening the vanes enough at higher gas flow therefore causing too much back pressure. This could be a trade off between lower gas flow small opening of the vanes and the bigger opening required the higher gas flow.

I have a boost gauge on the inlet manifold, it's pumping 15psi into the manifold at 100 - 110km/h. Which is the maximum to turbo is boosting to

Originally Posted by Michele

I'm quite sure you bought the same kit I have.
If so, that's a genuine, brand new 2.8 Powerstroke manifold.

Sorry to hear you're not fully happy (yet) with it.
I'll have to wait another week before fitting mine (hi-flow intercooler is being made in UK at the mo), I look forward to following your progress.

Couple of things:
1)did you have to modify the intake hose as per instructions?
I got hold of a kit for a mate first, and everything went in place keeping the hose as it is, no fuss.
2)are you planning to fit an EGT gauge?
The plate on the factory setup is very handy, I'm still wondering where to plumb the future sender with the new VNT...

My mate is very happy with this conversion, I heard from other pals from UK and they're very happy too, seems like the Tdi "go like rockets now", most of them are still fine tuning with boost pressure and fuel pumps though.

I think your right about the manifold, it has Brasil stamped on it. Those 2.8s are made in South America I think?

I didn't check whether the hose needed modifying or not I just did it

I should have checked first I guess

Yeah I do have an EGT gauge; it used to be fitted in that little plate just before the turbo. I didn't have the correct size tap handy yesterday; but I plan on drilling and tapping the manifold just before the turbo and sticking it in there. I'll post up pics sometime next week, should have it in Tuesday or Wednesday

Funny you say that, I reckon I'll have to start looking for a Disco transfer case. 1st gear just goes by too fast

**Disco_owner** · 24th January 2010, 08:53 AM

Hi Jock,

That's a very nice Kit , I recall Bush65 here posted up a table of RPM vs Boost to tune the boost compensator according to performance of Variable Vane turbo from 2.8 international ,

Edit: I found the Post

Allisport VNT for 300Tdi - LR4x4 - The Land Rover Forum

**Michele** · 24th January 2010, 08:57 AM

Originally Posted by Jock The Rock

Funny you say that, I reckon I'll have to start looking for a Disco transfer case. 1st gear just goes by too fast

And I though to fit 4.1 R+Ps in the future

**slug_burner** · 24th January 2010, 07:14 PM

Originally Posted by Jock The Rock

Air intake is still in the same spot, but it has an extension just behind the motor and the end is shortened a little bit

I have a boost gauge on the inlet manifold, it's pumping 15psi into the manifold at 100 - 110km/h. Which is the maximum to turbo is boosting to

I think your right about the manifold, it has Brasil stamped on it. Those 2.8s are made in South America I think?

I didn't check whether the hose needed modifying or not I just did it

I should have checked first I guess

Yeah I do have an EGT gauge; it used to be fitted in that little plate just before the turbo. I didn't have the correct size tap handy yesterday; but I plan on drilling and tapping the manifold just before the turbo and sticking it in there. I'll post up pics sometime next week, should have it in Tuesday or Wednesday

Funny you say that, I reckon I'll have to start looking for a Disco transfer case. 1st gear just goes by too fast

That is fine however you could still have the exhaust choked down too much (by the turbo vanes as it goes into the turbine not by the exhaust pipe after the turbo), without a pressure gauge there you don't know. When at 100 km you should be doing 2500 rpm or so and the tuning info on Bush65's post suggests that you should have over 20 psi at the inlet manifold at that rpm with Wide Open Throttle.

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