200tdi tuning

sidfish · Nov 22, 2023

Hi guys
I've got a range rover classic with a 200tdi. So far I have a boost pin and ring, manual boost controller, EGT and boost guages. Engine is low miles (77000) and it's fully serviced with all new oils, filters and belts. I need the truck for towing a heavy boat (2.5 tonne) and daily life on rural Irish roads (max 50 mph). At the mo I have loads more than standard top end (she'll cruise past 70 and keep going hard), but none of what I need, ie better low down grunt for towing and every day use. Any suggestions?
SiD

Rock Basher · Nov 22, 2023

Reduce the gearing and max out at 60mph.
Fit a 1.4 transfer box and a V8 MOD lt77.
That will give you all the power all the time right up to about 65mph.
Perfect for lanes and towing.

The MOD V8 LT77 box is easy enough to find they changed all the gears to keep it on go go.
Set up with the 1.4 transfer it will be lovely on the 200tdi.
I did it in my old 90 rig ......absolutely flew...

300bhp/ton · Nov 22, 2023

sidfish said:
Hi guys
I've got a range rover classic with a 200tdi. So far I have a boost pin and ring, manual boost controller, EGT and boost guages. Engine is low miles (77000) and it's fully serviced with all new oils, filters and belts. I need the truck for towing a heavy boat (2.5 tonne) and daily life on rural Irish roads (max 50 mph). At the mo I have loads more than standard top end (she'll cruise past 70 and keep going hard), but none of what I need, ie better low down grunt for towing and every day use. Any suggestions?
SiD

A tweaked Tdi should go well. But it is still a Tdi. If it isn't enough, you either have unrealistic expectations or it is the wrong vehicle/engine.

You could look at re-gearing which might help. But remember most power mods increase EGTs.

doriz · Nov 22, 2023

sidfish said:
Hi guys
I've got a range rover classic with a 200tdi. So far I have a boost pin and ring, manual boost controller, EGT and boost guages. Engine is low miles (77000) and it's fully serviced with all new oils, filters and belts. I need the truck for towing a heavy boat (2.5 tonne) and daily life on rural Irish roads (max 50 mph). At the mo I have loads more than standard top end (she'll cruise past 70 and keep going hard), but none of what I need, ie better low down grunt for towing and every day use. Any suggestions?
SiD

A different car. Low mileage RRC dipping boats in and out of the Ogin…be ruined in no time, just saying

sidfish · Nov 25, 2023

Rock Basher said:
Reduce the gearing and max out at 60mph.
Fit a 1.4 transfer box and a V8 MOD lt77.
That will give you all the power all the time right up to about 65mph.
Perfect for lanes and towing.

The MOD V8 LT77 box is easy enough to find they changed all the gears to keep it on go go.
Set up with the 1.4 transfer it will be lovely on the 200tdi.
I did it in my old 90 rig ......absolutely flew...

Thanks for that, I'll look into it. As is it seems that the mods I've made have produced more top end horsepower, which is pointless when you rarely breach 50mph, whereas better gearing will make this extra horsepower useable.

sidfish · Nov 25, 2023

300bhp/ton said:
A tweaked Tdi should go well. But it is still a Tdi. If it isn't enough, you either have unrealistic expectations or it is the wrong vehicle/engine.

You could look at re-gearing which might help. But remember most power mods increase EGTs.

She goes really well and EGTs only hit +700C on long uphills towing a 2.5T boat. I was just putting this out there to see if anyone had tried tuning boost pins etc for torque low down, rather than outright horsepower.

landowner · Nov 25, 2023

Lower profile tyres would gear it down

Turboman · Nov 25, 2023

sidfish said:
Hi guys
I've got a range rover classic with a 200tdi. So far I have a boost pin and ring, manual boost controller, EGT and boost guages. Engine is low miles (77000) and it's fully serviced with all new oils, filters and belts. I need the truck for towing a heavy boat (2.5 tonne) and daily life on rural Irish roads (max 50 mph). At the mo I have loads more than standard top end (she'll cruise past 70 and keep going hard), but none of what I need, ie better low down grunt for towing and every day use. Any suggestions?
SiD

Like he sez^^^^^^^^, smaller tyres are better for towing.
I used to use 205 65 R16s on my Ninety for towing a cattle trailer, which made about 87 hp, much less than a 200Tdi.
Quite adequate for towing on rural roads.

landowner · Nov 25, 2023

sidfish said:
She goes really well and EGTs only hit +700C on long uphills towing a 2.5T boat. I was just putting this out there to see if anyone had tried tuning boost pins etc for torque low down, rather than outright horsepower.

Just turn the fuel up a sniff so it don't smoke, no need for altering boost unless you want loads and loads of power, then better with bigger engine, over 3 tons all up is a lot of weight for 2.5 litres but 200 tdi will manage it, not at sports car speeds though.

sidfish · Nov 25, 2023

doriz said:
A different car. Low mileage RRC dipping boats in and out of the Ogin…be ruined in no time, just saying

The RRC is my daily driver, and tow truck. I have a small, old, hatchback for backup. The truck needs no MOT and costs only €57 a year tax and €160 for insurance (and breakdown). I bought it cheap. She does farm work (deep mud), fishing on the beaches and rocks, takes clients up mountains, goes shopping and tows the boat. She rarely gets wet with boat launching or retrieval and gets washed down after a dunking. The roads aren't salted here. I don't care that it's a 'classic' vehicle, I just want it to last me another ten or fifteen years ( I weld and do mechanics and electrics). She has a tuned TDI (as detailed), lifted suspension and a winch, and rust which needs constant attention (rear floor and inner wings this year). Compared to a 109 (which is too small for me in the cab), she has loads of space, comfort for five plus several dogs, all round discs (which work), a working heater and no leaking roof. These early RRCs were built to work and that's what they should do

Turboman · Nov 25, 2023

sidfish said:
The RRC is my daily driver, and tow truck. I have a small, old, hatchback for backup. The truck needs no MOT and costs only €57 a year tax and €160 for insurance (and breakdown). I bought it cheap. She does farm work (deep mud), fishing on the beaches and rocks, takes clients up mountains, goes shopping and tows the boat. She rarely gets wet with boat launching or retrieval and gets washed down after a dunking. The roads aren't salted here. I don't care that it's a 'classic' vehicle, I just want it to last me another ten or fifteen years ( I weld and do mechanics and electrics). She has a tuned TDI (as detailed), lifted suspension and a winch, and rust which needs constant attention (rear floor and inner wings this year). Compared to a 109 (which is too small for me in the cab), she has loads of space, comfort for five plus several dogs, all round discs (which work), a working heater and no leaking roof. These early RRCs were built to work and that's what they should do

Lifted suspension loses performance too.

sidfish · Nov 25, 2023

Turboman said:
Like he sez^^^^^^^^, smaller tyres are better for towing.
I used to use 205 65 R16s on my Ninety for towing a cattle trailer, which made about 87 hp, much less than a 200Tdi.
Quite adequate for towing on rural roads.

Deep mud on the farm and taking clients into the mountains demand the mud terrain 235 65 16s that I use. I know that I'm losing a lot to friction on tarmac, but the 200tdi defenders I used to drive were more reponsive low down

Turboman · Nov 25, 2023

sidfish said:
Deep mud on the farm and taking clients into the mountains demand the mud terrain 235 65 16s that I use. I know that I'm losing a lot to friction on tarmac, but the 200tdi defenders I used to drive were more reponsive low down

I used to have 3 sets of wheels and tyres for different purposes.

Tdi defenders have different gearing to Tdi Discos and Range Rovers.
You can get the same effect by using smaller tyres.

sidfish · Nov 25, 2023

landowner said:
Just turn the fuel up a sniff so it don't smoke, no need for altering boost unless you want loads and loads of power, then better with bigger engine, over 3 tons all up is a lot of weight for 2.5 litres but 200 tdi will manage it, not at sports car speeds though.

Thanks for that. I hadn't thought of the fuel delivery beyond the pump spacer. I'll also fit the high flow intercooler that never got fitted to the Defender. Cooler air at any boost must help?

sidfish · Nov 25, 2023

Turboman said:
I used to have 3 sets of wheels and tyres for different purposes.

Tdi defenders have different gearing to Tdi Discos and Range Rovers.
You can get the same effect by using smaller tyres.

She's only lifted 50mm to allow for better springs for the winch and towing. As for different wheels, I'll be possibly putting some smaller AT tyres on the original rims for daily use. Bigger rims and muds really drum on the road, but I only do about 15miles a day so it doesn't matter, and if I want to go fishing for a couple of hours I don't want to switch wheels first!

tottot · Nov 28, 2023

What is needed is the lower geared 1.4 transfer box. Its what was in Defenders and pre tdi models

lynall · Nov 28, 2023

sidfish said:
Deep mud on the farm and taking clients into the mountains demand the mud terrain 235 65 16s that I use. I know that I'm losing a lot to friction on tarmac, but the 200tdi defenders I used to drive were more reponsive low down

That will be because they have the 1.4 tfer box.

lynall · Nov 28, 2023

sidfish said:
Thanks for that. I hadn't thought of the fuel delivery beyond the pump spacer. I'll also fit the high flow intercooler that never got fitted to the Defender. Cooler air at any boost must help?

Every extra bit of fuel above standard will raise the egt.

200tdi tuning

sidfish

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Rock Basher

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300bhp/ton

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doriz

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sidfish

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sidfish

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landowner

Pensioner Pete

Turboman

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