300TDi injector pump and turbo. MORE WELLY PLEASE!!!!
Discussion
More acceleration or more pace? I've left my 300tdi engine standard for the sake of reliability and ease of getting bits on expedition, but installed a Roamerdrive overdrive which makes a huge difference to usability.
If a power increase is your quest then the normal route is boost pin & boost ring; full width intercooler; turbo upgrade (either complete or internals) pretty much in that order. There are a multitude of "how to" vids on YouTube for each of those.
If a power increase is your quest then the normal route is boost pin & boost ring; full width intercooler; turbo upgrade (either complete or internals) pretty much in that order. There are a multitude of "how to" vids on YouTube for each of those.
Thanks for that comment. I thought ODs were only available for series boxes.
Very very tempting indeed. I do have one eye on getting a galvanised everything in due course.....
I'd like a bit more power to go up hills better and a 6th gear on the dual carriageway.
"You should have kept the audi" says everyone
Very very tempting indeed. I do have one eye on getting a galvanised everything in due course.....
I'd like a bit more power to go up hills better and a 6th gear on the dual carriageway.
"You should have kept the audi" says everyone
IIRC, the Roamerdrive was built specifically for the defender transfer box, then a kit was brought out to adapt it to the series box to increase sales potential. Whilst it's not particularly cheap, in my opinion it's worth every penny - especially if your journeys involve significant dual carriageway/motorway use.
Rather than thinking of it as a 6th gear, think of it as an extra range i.e. you have Low, High and Extra High.
Synchrogearboxes are currently the cheapest place to purchase one.
Rather than thinking of it as a 6th gear, think of it as an extra range i.e. you have Low, High and Extra High.
Synchrogearboxes are currently the cheapest place to purchase one.
Andy-IM said:
IIRC, the Roamerdrive was built specifically for the defender transfer box, then a kit was brought out to adapt it to the series box to increase sales potential. Whilst it's not particularly cheap, in my opinion it's worth every penny - especially if your journeys involve significant dual carriageway/motorway use.
Rather than thinking of it as a 6th gear, think of it as an extra range i.e. you have Low, High and Extra High.
Synchrogearboxes are currently the cheapest place to purchase one.
Brilliant. I think I'm going to have one of these. I do need a bit more welly, I'll have a play with the pump and possibly the turbo. I don't want it to be silly, just a bit longer legged than it is and a weeny bit more keen!Rather than thinking of it as a 6th gear, think of it as an extra range i.e. you have Low, High and Extra High.
Synchrogearboxes are currently the cheapest place to purchase one.
Mining Subsidence Man said:
camel_landy said:
Don't bother... If you want a fast car, get a fast car.
M
I've just got rid of my fast audi. I have 9 points on my licence. M
I've driven a transit engined landy and I need mine to be a bit more like this.
M
Andy-IM said:
IIRC, the Roamerdrive was built specifically for the defender transfer box, then a kit was brought out to adapt it to the series box to increase sales potential. Whilst it's not particularly cheap, in my opinion it's worth every penny - especially if your journeys involve significant dual carriageway/motorway use.
Rather than thinking of it as a 6th gear, think of it as an extra range i.e. you have Low, High and Extra High.
Synchrogearboxes are currently the cheapest place to purchase one.
The Roamerdrive is excellent but it does highlight the peaky nature of the 300TDi's torque curve, a good solution would be a minor tweak to the fuelling and a Roamerdrive. I've not tinkered with the engine in mine because it's very high mileage now. I have measured fuel economy up to 32mpg on mixed-use journeys (motorway / rural), this is in a 110" Station Wagon.Rather than thinking of it as a 6th gear, think of it as an extra range i.e. you have Low, High and Extra High.
Synchrogearboxes are currently the cheapest place to purchase one.
Mining Subsidence Man said:
Folks, I have one of these as my new daily. I'm having to wring it's neck to do everything. It is not a TD5 for sure.
Can anyone point me in the direction of a guide to "turning her up loud"
Have you done anything yet?Can anyone point me in the direction of a guide to "turning her up loud"
A Tdi should not really be that slow. Although they can vary quite a lot in standard trim. There are quite a lot of things you can do, it will feel like it adds a lot more power. But the reality is, it won't.
Therefore on a clear road, the character of the power delivery can be changed a lot, but ultimately it won't be massively more speedy.
Some of these mods are free or cheap. But it can get pricey. Also are you planning on performing the mods yourself, or paying someone to do it?
Other options you might want to consider are engine swaps. No matter how much you spend on the Tdi, it just isn't a powerhouse.
The two easiest engine swaps are:
-Td5
-Rover V8
The Td5 is a good engine, smoother and more refined than Tdi and can make significantly more power for pretty much the same modifications.
The Rover V8 is also a great swap in these. As it is very much a bolt in affair (not quite, but almost, certainly no harder than the Td5). And is of course a standard fitment Land Rover engine. A good 3.9/4.0 or 4.6 will generally out perform the Td5 with relative ease. And of course you can tweak a Rover V8 also. MPG really is the only downer with the V8. But might be a lot closer to the diesels than you'd reckon.
Other fairly easy engine swaps:
-BMW M57 as used in the L322 Range Rover. There are kits to bolt this onto your existing gearbox. Or even swap in the BMW/ZF 6-speed manual.
-BMW 2.8 petrol, these were fitted by Land Rover to Defenders for the South African market. And can mostly be a bolt in affair using many factory parts.
Lots of other engine swaps too, although most others will start and cost a fair whack.
If you plan to stick with the Tdi.
If you want you can tweak the injector pump. This is free, lots of guides online for this. Or you can fit a boost pin, which sort of does some of it for you and is slightly easier to fit. Although not much.
Tweaking the pump can increase EGT's (exhaust gas temps) and the amount of smoke. If tuning at home, things like a boost gauge and EGT gauge can be handy.
You'll also find a big front mount intercooler will help loads if you do this.
They are the easy gain mods. Anything else will cost you a lot of money, for generally much smaller gains.
Hybrid turbos in theory should give a larger powerband, with potential of more tuning for higher HP. But the reality is, you probably won't see significant gains here.
Then you can go full out on a ported head, custom intake manifold and other things too. But by now you'll probably have spent as much or more than doing an engine swap. Don't forget traditional tuning mods like a better exhaust and such can also help out.
Overall the Tdi is a pretty stout unit. People have been tuning them for decades now. With very little in the way of direct tuning related engine problems or failures. So I'd personally not listen to the naysayers. They are by far the minority in this regard.
As for other parts of the vehicle. There is an Overdrive available. But it isn't cheap and often on backorder. About £1500+
Being an Overdrive, it will allow you to split each gear, so potentially 10 forward ratios in high range. However, if depending on what size and type of tyres you run. You may find the OD 5th (i.e. 6th gear...) too tall for some situations with the Tdi. But it can help on longer runs on motorway and similar.
Another option is to change the transfer box. The Defender uses a 1.4:1 ratio. The Discovery, which has smaller wheels in stock trim. Uses a 1.2:1 ratio transfer box. Swapping in the Disco transfer box will raise the gearing on all of the 5 high range gears. But again, with a Tdi might not be so good for some uses. Such as probably needing 3rd instead of 4th for 30mph limits. And hills requiring you to downshift, where previously you could have stayed in top.
It's also worth noting that at least half of the TDI tuning is there to help the off boost performance at low rpm. But this does generally produce quite a bit more smoke, as you are overfuelling the engine to compensate for the lack of boost. This can make them perform a lot better and good for towing. But if you have gearing that promotes low rpm use and engine labouring, you may find it'll smoke more than you desire.
The 1.2:1 transfer box may not be as good if you plan to tow either, as it makes 1st gear taller to pull away with. Also the 1.2:1 box, while it allows higher speeds in each gear. Taller gearing generally blunts acceleration a bit.
The trade off is, the 1.2:1 box can often be bought for £50-200, so a lot cheaper than the Roamerdrive Overdrive option.
300bhp/ton said:
camel_landy said:
Don't bother... If you want a fast car, get a fast car.
Victor Meldrew by chance?That said, people asking for more power from their 300TDi is often a pointer to the fuel pump 'compensator' mechanism seizing. This will lead to the pump not delivering enough fuel and starving it from performance.
The 300TDi, once wound up, shifts along nicely and plenty capable of getting the extra 3pts needed for a full house.
M
camel_landy said:
Being pragmatic. These are not built for speed... It's easier & cheaper to get a different car altogether.
That said, people asking for more power from their 300TDi is often a pointer to the fuel pump 'compensator' mechanism seizing. This will lead to the pump not delivering enough fuel and starving it from performance.
The 300TDi, once wound up, shifts along nicely and plenty capable of getting the extra 3pts needed for a full house.
M
It isn’t a race car. But they are fun to drive and respond well to a bit more power. And it isn’t as if Land Rover didn’t sell the model in substantially more speedy variants. With no changes to suspension or braking. So a Tdi model can easily cope with a few more ponies being offered up. That said, people asking for more power from their 300TDi is often a pointer to the fuel pump 'compensator' mechanism seizing. This will lead to the pump not delivering enough fuel and starving it from performance.
The 300TDi, once wound up, shifts along nicely and plenty capable of getting the extra 3pts needed for a full house.
M
300bhp/ton said:
It isn’t a race car. But they are fun to drive and respond well to a bit more power. And it isn’t as if Land Rover didn’t sell the model in substantially more speedy variants. With no changes to suspension or braking. So a Tdi model can easily cope with a few more ponies being offered up.
Maybe so but it's going to be at least 22yrs old and plenty of 'crusty' bits... I'd still suggest looking at the injector pump first, to make sure it's delivering the power it should.
M
Update:-
I ripped the anti tamper seal off the injector pump. Cracked the locknut and turned the screw 1.25 turns. It has made a difference.
My pal has "flipped the diaphragm" 180 degrees. I'm not going to do that. I will see how I get on, a roamerdrive will be on the cards at some point.
I had the misfortune of going from west cornwall to western super mare yesterday. Big headwind on the way back. Misery.
I ripped the anti tamper seal off the injector pump. Cracked the locknut and turned the screw 1.25 turns. It has made a difference.
My pal has "flipped the diaphragm" 180 degrees. I'm not going to do that. I will see how I get on, a roamerdrive will be on the cards at some point.
I had the misfortune of going from west cornwall to western super mare yesterday. Big headwind on the way back. Misery.
camel_landy said:
Yes, it will make a difference but your EGT values have probably also shot through the roof.
Better start saving for a new cylinder head.
M
I read a very learned article about tuning. I gather the real EGT issues come with messing around with the pin and the diaphragm. I don't even have any smoke on accelleration. Better start saving for a new cylinder head.
M
I'm leaving that alone at the moment.
The EGR has already gone.
Mining Subsidence Man said:
I read a very learned article about tuning. I gather the real EGT issues come with messing around with the pin and the diaphragm. I don't even have any smoke on accelleration.
The diaphragm & pin simply adjust the fuel to air ratio, relative to the turbo boost pressure.Turning that screw has simply increased the fuel, across the entire range!!
However, from your description, I suspect your pin/cone (under the diaphragm) has seized.
M
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