I want to upgrade the turbo on my td5 I want to do something a little different than just a VNT or hybrid. I saw a couple old threads about using a turbo out a sprinter van. I was thinking maybe something like that. There is a set of twin turbos for a 4l iveco diesel going cheap on Facebook I was considering that but I wasn’t sure if it was a bit big and would get bogged down. Anyone on here done anything like this or have any suggestions? Want low down power really that’s why I was thinking twin turbo

Twin turbos after incredibley difficult to get running on a TD5 properly. I only know of 2 that actually worked, one the system failed after a short while as there was no way to control the boost properly.

Second one had a workaround for it but a year later still working on getting it to run properly and better than a map + VNT.

A properly set up and mapped hybrid or VNT is going to be better than anything you can cobble together yourself. What ever you do fit youll need the ecu remapped and sensors replaced and adjusted.

I reckon a vgt will transform any easy diesel, simply by taking away that under 2k flat spot.

I'm quite pleased with mine how it behaves from low rpm without huge investment but not very cheap either with a remap and these:
1. https://www.ebay.co.uk/itm/323021778947
2. https://www.forgemotorsport.co.uk/A...Defender_or_Discovery_TD5--product--1033.html
3. https://www.ebay.co.uk/itm/193716905327?_trkparms=amclksrc=ITM&aid=1110006&algo=HOMESPLICE.SIM&ao=1&asc=20201210111314&meid=922f6ec3fc9e4e01a5a91d9b52aa4959&pid=101195&rk=2&rkt=12&sd=220537042109&itm=193716905327&pmt=1&noa=0&pg=2047675&algv=SimplAMLv11WebTrimmedV3MskuWithLambda85KnnRecallV1V4V6ItemNrtInQueryAndCassiniVisualRankerAndBertRecall&_trksid=p2047675.c101195.m1851&amdata=cksum:193716905327922f6ec3fc9e4e01a5a91d9b52aa4959|enc:AQAIAAABQA2rugFlOq3qu1cLac%2F%2Fk6Vp0Oa0HaJIqoXKeIiOR%2BTUgsSvHaeyPxKYu6UqHqq7GaGyKVqHQnjeiiXcQpMGw2t3aB%2BssGfjtIWOBj8wExc7oYYP7xGMyQCrHDyDaSaWjB1CueI3A94n0yxXX5dx5gCaWdHwtaDavrggWcFFV37Eh6FL1ogBWsMeoIlsSNkq4ravbheW3AYFgNJ4N6YKORATEecgwQi5v3jPUzHeR2Dmtoo1fdprMUL1lI66D2qBlHa%2BhDD7LRBHasCWa%2FUNFHSgiKWNg3z9b6AR777trr7ZmSiDlXqS9qbt1B0ZuNw9pS%2B3XvUCcld%2FMfA6GUJBFCvBYHlDDkrVZAFD0%2BgSFUv67qKn8n%2BuvvMk8YWVFpBAqJMSfLHfypd3MEIhH6wuGUvC1L6vWFNNZ8AI9NTX%2F5Y4|ampidL_CLK|clp:2047675

bankz5152 said:

Twin turbos after incredibley difficult to get running on a TD5 properly. I only know of 2 that actually worked, one the system failed after a short while as there was no way to control the boost properly.

Second one had a workaround for it but a year later still working on getting it to run properly and better than a map + VNT.

A properly set up and mapped hybrid or VNT is going to be better than anything you can cobble together yourself. What ever you do fit youll need the ecu remapped and sensors replaced and adjusted.

Click to expand...

I’m not dead on a twin turbo just I’m open to any turbo really but I want to do something Custom just because i enjoy working on engine and I’ve spent the last couple months welding the frame and Im sick of it just want a challenge. And yeah I will have to get someone to map it I might email TD5 inside.

sierrafery said:

I'm quite pleased with mine how it behaves from low rpm without huge investment but not very cheap either with a remap and these:
1. https://www.ebay.co.uk/itm/323021778947
2. https://www.forgemotorsport.co.uk/A...Defender_or_Discovery_TD5--product--1033.html
3. https://www.ebay.co.uk/itm/193716905327?_trkparms=amclksrc=ITM&aid=1110006&algo=HOMESPLICE.SIM&ao=1&asc=20201210111314&meid=922f6ec3fc9e4e01a5a91d9b52aa4959&pid=101195&rk=2&rkt=12&sd=220537042109&itm=193716905327&pmt=1&noa=0&pg=2047675&algv=SimplAMLv11WebTrimmedV3MskuWithLambda85KnnRecallV1V4V6ItemNrtInQueryAndCassiniVisualRankerAndBertRecall&_trksid=p2047675.c101195.m1851&amdata=cksum:193716905327922f6ec3fc9e4e01a5a91d9b52aa4959|enc:AQAIAAABQA2rugFlOq3qu1cLac%2F%2Fk6Vp0Oa0HaJIqoXKeIiOR%2BTUgsSvHaeyPxKYu6UqHqq7GaGyKVqHQnjeiiXcQpMGw2t3aB%2BssGfjtIWOBj8wExc7oYYP7xGMyQCrHDyDaSaWjB1CueI3A94n0yxXX5dx5gCaWdHwtaDavrggWcFFV37Eh6FL1ogBWsMeoIlsSNkq4ravbheW3AYFgNJ4N6YKORATEecgwQi5v3jPUzHeR2Dmtoo1fdprMUL1lI66D2qBlHa%2BhDD7LRBHasCWa%2FUNFHSgiKWNg3z9b6AR777trr7ZmSiDlXqS9qbt1B0ZuNw9pS%2B3XvUCcld%2FMfA6GUJBFCvBYHlDDkrVZAFD0%2BgSFUv67qKn8n%2BuvvMk8YWVFpBAqJMSfLHfypd3MEIhH6wuGUvC1L6vWFNNZ8AI9NTX%2F5Y4|ampidL_CLK|clp:2047675

Click to expand...

What’s the benefit of the actuator and boost controller just adjusting? I know basically nothing about td5 turning I’ve only ever done it on a tdi and obviously it’s much easier due to the lack of ECU

The way a turbo works is the same on a 300tdi or a TD5, it's the way the boost is controlled thats the difference.
A new actuator will likely give a more even and controllable pressure over a wider range.
The boost controller fools the wastegate to operate at a different pressure (often lower) than the actuator alone resulting in higher pressures entering the manifold,

Easy on a 300tdi (well I used that term advisedly) but on a TD5 you need to tell the ECU what you have done or at least what you want the boost system to do, so the engine will run.

On both engines controlling the fuelling is important, on the TDi it's a couple of mechanical adustments to the FiP, on a TD5 it's (again) computer controlled so ECU remapping.
And you need to know the exhaust gas temperature, and you need to contain that extra pressure and temperature or the head/manifolds warp.

Let me just leave what @bankz5152 said .."A properly set up and mapped hybrid or VNT is going to be better than anything you can cobble together yourself. What ever you do fit youll need the ecu remapped and sensors replaced and adjusted."

miktdish said:

The way a turbo works is the same on a 300tdi or a TD5, it's the way the boost is controlled thats the difference.
A new actuator will likely give a more even and controllable pressure over a wider range.
The boost controller fools the wastegate to operate at a different pressure (often lower) than the actuator alone resulting in higher pressures entering the manifold,

Easy on a 300tdi (well I used that term advisedly) but on a TD5 you need to tell the ECU what you have done or at least what you want the boost system to do, so the engine will run.

On both engines controlling the fuelling is important, on the TDi it's a couple of mechanical adustments to the FiP, on a TD5 it's (again) computer controlled so ECU remapping.
And you need to know the exhaust gas temperature, and you need to contain that extra pressure and temperature or the head/manifolds warp.

Let me just leave what @bankz5152 said .."A properly set up and mapped hybrid or VNT is going to be better than anything you can cobble together yourself. What ever you do fit youll need the ecu remapped and sensors replaced and adjusted."

Click to expand...

Oh yeah I’m aware an off the shelf vnt would be far better that anything I can do just want a challenge. Anyone done any td5 mapping at home I’ve got a nanocom and a nnn to go in. I’m not all that good on computers is the only problem.

I wouldnt bother with TD5inside, Jose gave up trying to map a twin turbo a few years ago. Couldnt get it to run properly.

Heres a guy in Oz doing one -


At home mapping can be tricky, adjust the wrong things and youll brick the ECU.

bankz5152 said:

I wouldnt bother with TD5inside

Click to expand...

I'd agree with that

Why not try a custom supercharger setup instead of a turbo if you want a diy challenge?

That would be really cool!

I'd say that as shiny and exquisitely made as it is, forget about that actuator, as you don't need it on a TD5.

In days of yore, turbo boost pressure used to directly act on the actuator, and thus control the maximum boost as the actuator would open the wastegate when the preset level of boost that the actuator was calibrated to was reached. People the stated using "granger valves" AKA "Manual/Mechanical boost controllers" became the norm, these reduce the pressure reaching the actuator, so if it had a 20% pressure drop across the grainger valve, a 15psi actuator would now open the wastegate at 18psi.

Later (mid nineties) tech saw the introduction of electronic boost controllers, which were a configurable box of witchcraft which opened a solenoid valve allowing boost pressure to reach the actuator, they also offered ways of dialing in the rate of spool up by feathering the actuator to control the "gain". Fun Fact - the TD5 already has that setup, located behind the airbox to turbo inlet is a boost control solenoid, and the standard engine ECU controls the turbo's output by using that solenoid and thus allowing boost air from the turbo to intercooler pipe to control the actuator.

If you want a challenge, look at setting up a GT2256v with an eBay VNT controller or an electronic boost controller or see if you can get a mapper who can use the ECU to control the solenoid to actuate the VNT. You'll need to find out if the VNT turbo you get is set up for vacuum actuation, or boost actuation, and plumb in the solenoid or reconfigure the actuation accordingly.

Jayridium said:

I'd say that as shiny and exquisitely made as it is, forget about that actuator, as you don't need it on a TD5.

Click to expand...

Yes, i didnt need it just fitted it and i felt the improvement cos it has a lighter spring than the standard valve hence a more linear actuation once it opens and i prefer to control it's opening point with the MBC rather than tightening the rod, mine is remapped for higher boost too so with the std tight actuator it had jerks as that one doesnt react well to the wastegate modulator's activity, too rough, which doesnt happen with the forge actuator and the mbc ... i drove a friend's competition defender which has a VNT and i'm not up to pay so much for that difference especially that mine is a daily driver and 10P engine so the fuel map can't be dynamically adjusted via the OBD port based on live readings if you see what i mean by that.