300 tdi acceleration query

[rexel]

I have a 1994 Discovery 300tdi. The 0-60 time is around 28 seconds. Can anyone tell me if that is about right and if not what is likely to be the cause. Any tips on improving that time would be great.

[DISCOVERY-CPL]

Discos are not really sports cars but clean the fuel system and Air filter & intercooler mine 200tdi will do 0-60 MPH in about 12.5 secs without trying but i have put a little few mods on :biggrin::biggrin: but i like the power not the speed ,, But what are you wanting a fast Disco ??? ,

[rexel]

No, I'm not looking for my disco to be a sports car but I thought that 28 secs just seems so slow. I would be more than happy with 12.5. I tow a horse trailer and even with the slightest head wind I have a job to reach 45mph. I don't really want to go faster than that with a horse on board but maybe when empty or hauling hay and straw.

It just seems to struggle most of the time. Disco's are rated to tow 3.5 tons but I doubt mine would. Any advice would be useful.

[300bhp/ton]

I have a 1994 Discovery 300tdi. The 0-60 time is around 28 seconds. Can anyone tell me if that is about right and if not what is likely to be the cause. Any tips on improving that time would be great.
Does it smoke?

If not we need to fix it :D:D:D

There are lots of ways to get better performance.

The main ones however are to tweek the injector pump, it'll make the motor run a lot better and possibly more economical too. Combine this with a bigger intercooler and you'll think someone has slipped a 4.0 litre diesel in there.

You can do this yourself if you have the know how, or get someone like Allisport to supply and tune it for you.

[rexel]

No it doesn't smoke. Would fitting new diesel injectors make a difference.

[DISCOVERY-CPL]

Clean out the intercooler new Filters and tweek the pump then try it and use some Diesel Power Sport 4 in your fuel

[300bhp/ton]

No it doesn't smoke. Would fitting new diesel injectors make a difference.
Nope probably not, not unless there is something wrong with them.

Assuming the engine is fit and healthy (which it probably is), means its running as it has since it left the factory.

Diesels are a totally different ball game to petrol engines. The essence of making more power is to throw as much fuel as you can into the cylinder without melting anything. The more that goes in the more that gets burnt = more power.

However it'll never burn 100%, so the black smoke is the unburnt fuel, by upping the fueling you'll get more black smoke under heavy acceleration. It sounds like a negative, but this can often increase mpg, the main reason is you no longer need to drive at WOT (wide open throttle) to go anywhere. So under normal driving expect to see as good or better mpg figures.

The Tdi engines use a Bosch injector pump, this is basically the throttle control on a diesel engine. It has several dials, screws and other adjustments. Factory settings are very stingy and some seem worse than others (only a fraction of a turn on some of the screws make a huge difference).

The biggest issue you may have, is some late 300Tdi Discovery's where ECU controlled. I think you can tune these, but I don't know how or how cheaply.

If yours is of the non ECU variety then it is very easy to tune. If you want you can tweak the pump yourself and as long as you don't get greedy there's no problem with this. To get the best results however a bigger intercooler helps a lot on the Tdi's.

For some dumb reason Land Rover saw fit to use an intercooler which is about 1/5th the required size. The whole idea of an intercooler is to cool the air intake charge. The turbo, by compression heats the air up, we need to cool it for performance and better running.

If you wanted you could buy a universal intercooler, or maybe a 2nd hand one from a breakers off of something like an old Supra Turbo and retrofit it to your Discovery. Or buy one from somewhere like Allisport, Jeremy J Fearn, Twisited Performance, Allard Turbo's and so on. In many cases these places will fit the intercooler for you and tune the injector pump at the same time.

Doing this should see in the region of a 35% power/torque increase, it is very noticable it also massivly improves throttle response and low end grunt.

On my current Disco I got Allisport to supply and fit the intercooler and tune the pump. This was about 2 years back and cost £400-420 all in.

If you want to have a go at doing it yourself however PM me your email address and I'll email you a document detailing how to do it.

[maxtherotti]

cool so smoke is good then??
i was getting worried about mine lol
it has been tweaked prior to me getting it (pump/de cat/de egr/itg panel fiter/brunell intercooler(stock size tho)/and alloy intercooler pipes) but it does smoke when wot and when trailing into roundabouts when back on throttle does let a large **** of black smoke out :D
upside of this is its defo wayyyyyyy quicker to 60 than 28secs (never timed it but would think 12secs would be nearer??

rob

[ComicalEngineer]

Why not try the basic stuff first!

De-cat pipe (£20)
New fuel filter
Clean out the sedimenter
New air filter (or an ITG/K&N filter)
Remove the viscous fan

[Satancom]

When I got mine it was a bit sluggish.



I did the tappets See here
(http://forum.landrovernet.com/showthread.php?t=51528)
Changed the air filter
Cleaned out the intercooler
Cleaned out the sedimenter


and it improved a great deal.

[300bhp/ton]

cool so smoke is good then??

:D:D:D:D:D:D:D

Go on Youtube and search for Cummins Dodge Ram or Chevy Duramax. These are two of the best diesel engines IMO and the guys in America get stupid reliable HP out of them.

It's not unusual for a street/daily driven diesel truck to be able to make 500-600bhp and over 800lb ft of torque and even more impressive still get better mpg than a V8 Range Rover despite being bigger and heavier.

The 6.6 litre Duramax V8 sounds bloody fantastic too :eek::cool::D

[kylepres]

:D:D:D:D:D:D:D



The 6.6 litre Duramax V8 sounds bloody fantastic too :eek::cool::D

I have a friend in Louisiana, works as a fitter for one of the oil companies, has one of the Chevy 3500s with a Duramax engine in it. Uprated to over 500 bhp and goodness knows what torque and he has covered over 100,000 miles in it without missing a beat and averaging around 18 m per US gallon . Those Duramax engines are built by Isuzu.

[rexel]

Hi
My disco is the non ECU type. It would be great if you could send me the tuning document. My email address is tony.bymolen@tesco.net
Thanks

[maxtherotti]

[quote=300bhp/ton;1230333]

Go on Youtube and search for Cummins Dodge Ram or Chevy Duramax. These are two of the best diesel engines IMO and the guys in America get stupid reliable HP out of them.

quote]

i used to work for cummins high horse power building the engines so i know big diesels smoke lots lol (smallest was a v12 35 litre up to a v18 91 litre)
mine is prob fine tbh just after a series of v8 engines seeing smoke makes you worry!!!!!
rob

[thebiglad]

Hi
My disco is the non ECU type. It would be great if you could send me the tuning document. My email address is tony.bymolen@tesco.net
Thanks


Hi Rexel, it sounds to me like your car isn't running as it should, in std trim.

Before you go getting involved in various modifications I reckon it would make sense to identify what the current problem is.

A std manual 'box Disco TDi300 will do 0-60mph in 17.8secs. As your's is way under that, I would suggest an immediate change of airfilter, dismantle/clean and reinstall the fuel sedimenter, change the fuel filter and test the fuel lift pump. Dismount and check the internal walls of the rubber turbo hoses for de-lamination. Clean out the intercooler.


Once that lot is done, check the performance again. Once you're getting 0-60 in 17secs, then considor other mods like:

1. De-EGR

2. De-Catt

3. Tuning the injection pump.

If you don't get the basics right, you'll never benefit from the mods.

Good luck

Dave

[nicedayforit]

As well as all the above I might be inclined to look for an air leak into the fuel system.
Two things initially, the pipe elbows of the fuel tank sender will probably be corroded/perforated and secondly are the spill pipes on the injectors in good condition.

[300bhp/ton]

i used to work for cummins high horse power building the engines so i know big diesels smoke lots lol (smallest was a v12 35 litre up to a v18 91 litre)
mine is prob fine tbh just after a series of v8 engines seeing smoke makes you worry!!!!!
rob
Very cool :D

[maxtherotti]

not really i got laid off last week:eek:
but the engines are very cool
its quite impressive feeling 16000 nm,s of torque powering up in the test cells (i think the highest hp we built was 10000hp)
not cheap but defo cool
and fuel consumption measured in kilos per hour!!!!!!!!


rob

[300bhp/ton]

not really i got laid off last week:eek:
but the engines are very cool
its quite impressive feeling 16000 nm,s of torque powering up in the test cells (i think the highest hp we built was 10000hp)
not cheap but defo cool
and fuel consumption measured in kilos per hour!!!!!!!!


rob
Sorry to hear about being laid off, similar happened to me in Oct.

[maxtherotti]

hey its the same all over fella
im not the first and defo wont be the last lol

rob

[300bhp/ton]

Hi
My disco is the non ECU type. It would be great if you could send me the tuning document. My email address is tony.bymolen@tesco.net
Thanks
Email sent, give me a shout if you need to. :)

[300bhp/ton]

hey its the same all over fella
im not the first and defo wont be the last lol

rob
Too true...

[littlerangie]

Email sent, give me a shout if you need to. :)

If possible, could you send it to me???

PM me if you can and i'll give you my addy...

Cheers
Calum

[MadDan]

Hi Rexel, it sounds to me like your car isn't running as it should, in std trim.

Before you go getting involved in various modifications I reckon it would make sense to identify what the current problem is.

A std manual 'box Disco TDi300 will do 0-60mph in 17.8secs. As your's is way under that, I would suggest an immediate change of airfilter, dismantle/clean and reinstall the fuel sedimenter, change the fuel filter and test the fuel lift pump. Dismount and check the internal walls of the rubber turbo hoses for de-lamination. Clean out the intercooler.


Once that lot is done, check the performance again. Once you're getting 0-60 in 17secs, then considor other mods like:

1. De-EGR

2. De-Catt

3. Tuning the injection pump.

If you don't get the basics right, you'll never benefit from the mods.

Good luck

Dave

+1:cool:

[300bhp/ton]

If possible, could you send it to me???

PM me if you can and i'll give you my addy...

Cheers
Calum
I just need an email addres, PM it to me or if you don't mind others seeing it post it. :)