4BD1 LR 120 Turbo?

Rangier Rover · 15th August 2008, 09:21 PM

Have just got home with the 4BD1 120 I have just purchased. Was a bit nervous jumping in a 19 yr old Land Rover that I didn't realy know for a 3&1/2 hour trip in the dark.

We made it. Just posting this as I noticed on a long hill did not pull well as should with Turbo on it. It pulls well through the gears but won't hold power. At 80kmh in 4th(Santana) can feel a surge then when back of a bit comes clean. Has had new Filters 4000 Kms ago. I have Dyno specs here. when Turbo was fitted. 44kmh= 312nm & 35kw. 52kmh= 330nm & 44kw. 60kmh= 338nm & 54kw. 70kmh= 322nm & 60kw. 82kmh= 296nm & 62kw. 88kmh= 254nm & 61kw.
Was done by Turbo Glide Wollongong. Are these numbers what I should expect? 1st 4BD1 I've ever owned.. Tony

**justinc** · 16th August 2008, 12:40 PM

Hi Tony,

Those figures probably suggest it has a wastegated turbo, and the pumpneeds to be matched a little better to the turbo installation.

I haven't dynoed mine, but it behaved in similar fashion until I fitted a Pyro and discovered it was way under fuelled

I wouldn't do any playing until a pyro is on there and it can be fiddled with either in the real world or on a Dyno.

Also, that surge you are feeling could be the banjo inlet fitting on the bottom of the lift pump gauze screen partially blocked. It is worth checking, even though it is a difficult one to get to.

JC

Rangier Rover · 16th August 2008, 01:06 PM

Fuel filters..... Has a GAV296 type fitted behind cab. On the Engine is a Fleetguard FF5231. My suplier has Ryco seems to think it should hve a Z169A or Z1277

What it best to run on these. I'd like to adapt a Cav296 so same as all our fleet here.

Rangier Rover · 16th August 2008, 01:13 PM

Originally Posted by justinc

Hi Tony,

Those figures probably suggest it has a wastegated turbo, and the pumpneeds to be matched a little better to the turbo installation.

I haven't dynoed mine, but it behaved in similar fashion until I fitted a Pyro and discovered it was way under fuelled

I wouldn't do any playing until a pyro is on there and it can be fiddled with either in the real world or on a Dyno.

Also, that surge you are feeling could be the banjo inlet fitting on the bottom of the lift pump gauze screen partially blocked. It is worth checking, even though it is a difficult one to get to.

JC

Sure is wastegated set up. Has no phyro or bost guages

Where is the best place to fit Phyro. Is dump pipe to far away from heat?
I'll try the banjo sreen see how it goes. Thanks Tony.

Rangier Rover · 16th August 2008, 01:54 PM

I assume the screen filter is here

Its a bit close to engine mount. I hope I can get it out. Tony

**justinc** · 16th August 2008, 02:54 PM

Yup, thats the screen filter

Good luck, or just ring Dave (Blknight.aus) and ask him if his young bloke has yet to master THIS job. He'll have the small hands for it....

(See his thread about 'labouring to produce a mechanic', excellent pic!

)

Pyro should be drilled upstream of the turbo, Mine is in just before the mounting flange for the turbo.

Any chance of engine pics etc? Is it a factory turbo engine?

JC

Rangier Rover · 16th August 2008, 03:48 PM

Originally Posted by justinc

Yup, thats the screen filter

Good luck, or just ring Dave (Blknight.aus) and ask him if his young bloke has yet to master THIS job. He'll have the small hands for it....

(See his thread about 'labouring to produce a mechanic', excellent pic!

)

Pyro should be drilled upstream of the turbo, Mine is in just before the mounting flange for the turbo.

Any chance of engine pics etc? Is it a factory turbo engine?

JC

I saw Dave's new apprentice

Great work

Turbo looks like a aftermarket. To neat for a factory jobie

Hard to get good pics.... I have these for now.

Tony

**DRanged** · 16th August 2008, 03:51 PM

If you get the banjo filter out leave it out and put a small in line servicable filter in the flexable fuel hose before the pump, preferably one with a clear polycarbonate body.

Justin

Rangier Rover · 16th August 2008, 03:56 PM

Originally Posted by DRanged

If you get the banjo filter out leave it out and put a small in line servicable filter in the flexable fuel hose before the pump, preferably one with a clear polycarbonate body.

Justin

Thanks for that

I would have put it back in otherwise

. Has a cav296 in line now but half way back to tank. So will stick a throwa filter in close to pump. Tony

**justinc** · 16th August 2008, 04:05 PM

Originally Posted by Rangier Rover

I saw Dave's new apprentice

Great work

Turbo looks like a aftermarket. To neat for a factory jobie

Hard to get good pics.... I have these for now.

Tony

Tony, that is the same turbo and manifold I have on mine, although to fit in a RRC I flipped the manifold and ran the dump pipe to the rear.

Turbo Glide did lots of conversions for these engines, and this is where I sourced a few of my parts. It is most likely the same turbo as mine too, A Garrett TB25. (They recommended it to me ) and the wastegate is set to 7.5Psi

As it is non adjustable, I just disconnected it completely and set my 15psi using fuelling. (Essential to do this with a Pyro!!) I am running an intercooler, so 15psi is fine. Non intercooled, 10 to 12psi is on the edge of peak efficiency. With this setup,10 psi and upped fuelling will give a huge improvement!

Give me a call 0408 995 635 if you need help with anything!

JC

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