Defender TD5 Turbo question

lightning · Jul 7, 2020

My TD5 110 has a mild remap (around 25bhp and more torque)
Everything else is standard.

What would happen if l shortened the wastegate actuator from the standard 12/13 threads to 10?

l’ve looked online and the discussions run to whole chapters on it. Although it seems that shortening the rod can make an improvement, exactly what improvement is seemingly open to pages more debate.

ls there a simple answer. If l shorten the actuator by 2/3 threads will the Defender be improved or will it just produce excessive EGT and warp the manifold, or over-boost and go into low power mode.

neilly · Jul 7, 2020

Ideally you need to have a nanocom fitted to read the outputs.
I adjusted my wastegate on the D2 after a stage 1 tune until it would read just under the max limit before hitting the overboost limit which iirc is about 242, but may be wrong.

Cheers

neilly · Jul 7, 2020

@bankz5152

any input?

Cheers

bankz5152 · Jul 7, 2020

3 full turns shorter.

It will have more boost thus more power.

Ideally use a nanocom or boost gauge to set boost. 18psi is good for a standard turbo.

Or you can keep adjusting until you hit limp mode then wind it back half a turn or so

lightning · Jul 7, 2020

Thanks l will give that a try and see if there’s any difference.

One problem l’ve always had with this TD5 Defender is, that it seems to take a while for the turbo to come in once you get to 1500rpm, and during this time it throws out a fair bit of white smoke (unburnt diesel)

When it was first remapped this smoke was truly excessive and the guy from Dynachip had
to turn down the boost twice to
reduce it.
Now it only does it if you try to accelerate flat out in third or fourth gear at under 1500rpm.
Once the turbo comes in the smoke stops. It’s done this for the last 40,000 miles and has never changed.

bankz5152 · Jul 8, 2020

That would suggest to me that fueling is poorly adjusted.

Or its coolant mixing not derv.

lightning · Jul 8, 2020

It’s definitely not coolant.

l originally had it remapped by Alive and it smoked more than an SAS smoke grenade when you floored it.
(Not exaggerating)
It’s since been reset to standard and then remapped by Dynachip
It’s OK now not perfect but much better. I’ve since done over 40,000 miles so it can’t be anything other than fuelling.
But everything has been replaced and it still kicks out white smoke on full throttle at low RPM

lynall · Jul 8, 2020

I had remap by alive and the smoke was pretty damned impressive!
Tbh that remap put me off remaps full stop, and I have not altered any ecu controlled car since.

You can wind the boost right up, but you need a boost controller box to fool the ecu into thinking all is okay.

This kind of thing, cannot rememeber what make the one I used was, https://www.ebay.co.uk/itm/Land-Rov...609210?hash=item1ee433a6fa:g:TpYAAOxyNkRSUFsU

Si Click · Jul 8, 2020

It sounds as though your turbo may be a bit reluctant to spool up. One option might be to fit a hybrid core. I put one in from Turbo Rebuilds and it has worked well; no noticeable additional power, but it spools up almost immediately making it a much better vehicle at lower rpms and a far better match for the V8 torque converter fitted to my TD5. As for the rod, if you don't have a means of reading live data, just keep shortening it and testing full welly; when it goes into limp mode, wind it back a turn.

bankz5152 · Jul 8, 2020

lynall said:
I had remap by alive and the smoke was pretty damned impressive!
Tbh that remap put me off remaps full stop, and I have not altered any ecu controlled car since.

You can wind the boost right up, but you need a boost controller box to fool the ecu into thinking all is okay.

This kind of thing, cannot rememeber what make the one I used was, https://www.ebay.co.uk/itm/Land-Rov...609210?hash=item1ee433a6fa:g:TpYAAOxyNkRSUFsU

Those boost boxes are awful. You can run up to around 20psi before the ECU sees overboost.

The standard turbo is quite happy at around 18 - 20psi much more and it geta laggy.

I can see why youd be put off and Alive should have adjusted the map until you where happy. I wouldnt be put off just somewhere else!

Hybrid cores dont really do much but they are cheap however got nothing on a proper Hybrid.

@lightning are you 100% its not using coolant?

bankz5152 · Jul 9, 2020

lightning said:
It’s definitely not coolant.

l originally had it remapped by Alive and it smoked more than an SAS smoke grenade when you floored it.
(Not exaggerating)
It’s since been reset to standard and then remapped by Dynachip
It’s OK now not perfect but much better. I’ve since done over 40,000 miles so it can’t be anything other than fuelling.
But everything has been replaced and it still kicks out white smoke on full throttle at low RPM

Does it kick out white smoke at all points? I.e cold, hot etc...?

lynall · Jul 9, 2020

bankz5152 said:
Those boost boxes are awful. You can run up to around 20psi before the ECU sees overboost.

The standard turbo is quite happy at around 18 - 20psi much more and it geta laggy.

I can see why youd be put off and Alive should have adjusted the map until you where happy. I wouldnt be put off just somewhere else!

Hybrid cores dont really do much but they are cheap however got nothing on a proper Hybrid.

@lightning are you 100% its not using coolant?

I had many maps by them, it was an 10p engine, so I had to swap the chips myself, I had several chips, and whilst they made great power you could not do it without making smoke off boost, and still some smoke under boost
To be honest this is not their fault, it is an old engine design, and it can only go so far and thats it, same as tweaking the tdi models.

In the time I had it, it had all sorts, cheap plug in tuning box, a much better/expensive tuning box, that was actually quite good, then an alive remap, boost controller, large intercooler.
I liked the car.but it was never quite there, now have a D3 which I think is totally std tune wise, and whilst sometimes I think I want more power, I remember all the grief every tuned land rover has ever given me!
I think it might have been real good with a vgt turbo and a map to suit, but i suspect it would still be a hiding to nothing.

Qucik google reminded me the good tuning box was a Dastek unit, actually two boxes.

lightning · Jul 9, 2020

@lightning are you 100% its not using coolant?[/QUOTE]

Yes l’ve done over 40,000 miles and it never needs topping up.
Also the smoke didn’t occur with the standard map.
It only does it if you floor it in third or fourth gear at under 1500 rpm
As soon as the turbo begins to come in, the smoke disappears.

Si Click · Jul 9, 2020

bankz5152 said:
Hybrid cores dont really do much but they are cheap however got nothing on a proper Hybrid.

They do not produce additional power like a full aftermarket hybrid, but they do spool up faster and at lower rpm than the original. If you are seeking a vast improvement in performance then go full hybrid, but if you just want better manners are low rpm then they are a very good option if you need to replace your standard turbo.

bankz5152 · Jul 9, 2020

lightning said:
@lightning are you 100% its not using coolant?

Yes l’ve done over 40,000 miles and it never needs topping up.
Also the smoke didn’t occur with the standard map.
It only does it if you floor it in third or fourth gear at under 1500 rpm
As soon as the turbo begins to come in, the smoke disappears.[/QUOTE]

Theres a possibility thats an injector issue then. Fuel not atomising correctly and causing the white smoke.

lightning · Jul 9, 2020

That hybrid core turbocharger sounds like a good option.

Is it just a case of replacing the turbo, no need for any ECU remapping or anything else?

Not sure about the injectors, they’ve never been looked at and it’s now on 120,000 miles.
It was like that at 60,000 miles though.

bankz5152 · Jul 9, 2020

Still could be faulty.

The increased fueling would make this more apparent.

lynall · Jul 9, 2020

White smoke would suggest to me retarded timing.
Sure there was a recent post where a TD5 owner had an issue with the timing and smoke?

bankz5152 · Jul 9, 2020

lynall said:
White smoke would suggest to me retarded timing.
Sure there was a recent post where a TD5 owner had an issue with the timing and smoke?

Ahhhh didnt think of that. Very good point and also very possible.

lightning · Jul 9, 2020

How is the timing adjusted on the TD5. Is it done electronically?

Defender TD5 Turbo question

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