Vehicle & Technical > Defender
300tdi torque and bhp figures?
Magnum335:
Thumbs: well said also!
If you want to transform the disco in the broadest way i would fit an uprated intercooler, it really is the best of both worlds:
If you want to drive economically it allows you to with the extra torque available, and if you need the extra poke its there if you need it. It will pay itself off at the fuel pumps. I see no drawbacks to it, unlike the uprated turbos which increase fuel consumption.
Another cheap way of increasing MPG is to buy a boost guage, it alows you to monitor your driving style and back off the throttle when you dont actually need it. You'd be amazed at how much you can back off and hold teh same speed!
thumbs:
boost gauge is a good idea, i do try and back of the throtle when on longer runs at speed, not so worried about mpg as i dont do a million miles, just would like that little extra omph!
Magnum335:
Bolt a big off turbo on it and a hooooooooooge intercooler and tune teh pump internally.
How have you tweaked the pump? With the screws on the outside?
Porny:
--- Quote from: "barnyfarmer" ---ITG Air filter, Allisport Intercooler and pump tuning, Turner's Engineering Performance gasflowed cylinderhead.
The performance figures are what someone quoted but others say it is likely to be larger than what i have down because the gasflow head performance varies with the way it is driven. I wont know unless it goes on a dyno....
--- End quote ---
150bhp.... you should be close, but I doubt it's more than that. In all honesty a lot of people mention figures, but they are not always achievable (a lot of factors dictate actual performance)... I also don't believe some peoples rolling road figures - as not all rolling roads are the same!! Useful as a comparison between two cars though (if done on the same rolling road)
250 – 260lbft is about right with the torque though….
--- Quote from: "barnyfarmer" ---You'll be up there with those figures with the intercooler and zorst. I'm toying with the idea of the twisted performance tornado exhaust and a hybrid garret turbo....
--- End quote ---
Twisted performance exhaust…. Too may fixings IMHO, plus I cut my finger on the Td5 at one of the shows.
My 90 runs a competition system from Exact Fabrication – www.exactfabrication.co.uk - all in high grade stainless, all TIG welded, and 2.5†from the turbo back. Does definitely spin up faster (less lag), and sounds very nice!! (will try and record it at some point)
Chris will make you what ever you want, and his work is to a ‘very’ high standard!!
(I’ve got no connection, just a happy customer!)
As for the Turbo, speak to Andy at Allisport (though I know a few other people do them too)….
Just make sure it’s properly matched, too big and you’ll get loads of lag.
If I had the money, I’d fit a VNT (variable nozzle/vain turbo) – they make a massive difference to low down torque. You can fit the one off the 2.8TGV engine – the Brazilian made 300Tdi (but their 2.8L version) – you can use all the TGV manifold etc etc – which makes it look like a factory job.
--- Quote from: "barnyfarmer" ---Porny, are you talking about a 300tdi with EDC? How much do you know about them?
--- End quote ---
A bit… what do you want to know?
--- Quote from: "redlinemike" ---
mine with a TD rear section & straight through centre
new exhaust is straight through front to rear & comes out through the rear wing,should sound about the same i think
--- End quote ---
Mike, your exhaust sounds nice…. Not as nice as mine though!! ;)
--- Quote from: "barnyfarmer" ---
If you want to transform the disco in the broadest way i would fit an uprated intercooler, it really is the best of both worlds.
If you want to drive economically it allows you to with the extra torque available, and if you need the extra poke its there if you need it. It will pay itself off at the fuel pumps. I see no drawbacks to it, unlike the uprated turbos which increase fuel consumption.
Another cheap way of increasing MPG is to buy a boost guage, it alows you to monitor your driving style and back off the throttle when you dont actually need it. You'd be amazed at how much you can back off and hold teh same speed!
--- End quote ---
A more efficient intercooler does make a difference, but you need to adjust the FIP to suit
--- Quote from: "barnyfarmer" ---
Uprated turbo increase fuel consumption…
--- End quote ---
Yes and no…
No more so than a big intercooler and the FIP (fuel injection pump) mods.
What really matters is how you drive it. If you drive very lightly on the throttle then due to the extra torque and power you will be able to pull a higher gear, use less throttle etc etc – which in theory you will actually see an improvement in MPG….
However, if you use the extra power available then the MPG will drop (the simplest view is that the more diesel you put in, the more you will use – and to get power out of a diesel you add more fuel!!)
So in theory, driven carefully with a tweaked pump, hybrid turbo, big intercooler your MPG should be as good as before the mods…. Driven hard though, you will use more fuel!!
Boost gauge…
I was running two in my 90 last week!!! :wink:
Been playing around with boost control, and preventing waste gate creep… that’s another story though.
A boost gauge is a helpful addition, but I don’t really see the need for one to be fitted all the time… once the boost is set then just leave it be – just check it every so often.
More important (IMHO) is the ability to measure EGT (exhaust gas temp) – more fuel in a diesel = higher EGT (a petrol works the other way round).
If you start getting higher than 750-800°c then you need to back off the fuelling a bit (or lift off the throttle) – to a high will start cracking exhaust manifolds (or more!!)
--- Quote from: "barnyfarmer" ---
How have you tweaked the pump? With the screws on the outside?
--- End quote ---
Screws on the outside – are we talking the max fuel screw?? Or something else?
(If Allisport tweaked your pump, this hasn’t been adjusted :wink: )
On mine (at the moment) the diaphragm is set at max and the star wheel has been adjusted a bit… need to fit a thermocouple to measure EGT before I start going further…
Plus I’m waiting for Andy at Allisport to finish my ‘custom’ intercooler!!!
- Sorry about the long thread……
Ian
Magnum335:
Yeah it was my diaphragm inside that was tweaked, so i still have the outside screws to fiddle with should i want more power, but i am happy with it at teh moment really.
You are correct in the intercooler will increase fuel consumption if you drive it to the max, i however have no experience with the big turbos and assumed they increased it, will they decrease it if you drive it economically?
I drive for economy. Currently averaging 35mpg.
As i said, my boost guage is there to keep a check on unrequired throttle, not for tweaking the pressure. I see the boost guage as a sort of exhaust flow guage, so more exhaust means more mix has gone in. I can be at 0.6bar doing 55mph maybe edging up, but i stick at 55 really, so when i see i am doin .6 bar, i back off down to 0.3 or 0.4 and it holds 55 very nicely. That is how i use it, and for me it works.
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