Manxman
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Has anyone got any good tips for tuning the 300 tdi Discovery? I have just bought a 1996 speciman and I would like to wake her up!
Discovery tuning
- Thread starter Manxman
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TheMunster
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If it has an EGR valve then think about removing it, if your inlet manifold is caked with ****e then you might wanna remove that to clean it (carefull as you will probably have to remove the exhaust manifold as well to fit a new gasket).
Flush ur intercooler out, do all filters etc etc (depending on mileage you might wanna flush the engine out when you do the oil, you can get flushing oil from morris lubricants, just google thier name, its under motorsport in thier shop btw).
Check and adjust valve clearences.
There are also things you can do that involve tweaking the injector pump and turbo boost settings but you might not want to muck about with that (i havent bothered as i'm happy with her how she is and i need to stay above 30/32mpg)
i'm sure people will come up with more.
Flush ur intercooler out, do all filters etc etc (depending on mileage you might wanna flush the engine out when you do the oil, you can get flushing oil from morris lubricants, just google thier name, its under motorsport in thier shop btw).
Check and adjust valve clearences.
There are also things you can do that involve tweaking the injector pump and turbo boost settings but you might not want to muck about with that (i havent bothered as i'm happy with her how she is and i need to stay above 30/32mpg)
i'm sure people will come up with more.
Adz
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Doesn't make any difference to the economy, fine tuning a diesel... if anything you'll make it better not worse. Trick is, not driving it like a hoon after you've tweaked it. Tuning a diesel isn't like tuning a petrol engine - the economy is a factor of the aerodynamics and the mass of the vehicle as diesels run, or should, with a surfeit of air at almost all times. If you don't change either of those then the amount of energy used to move the vehicle at the same speed as before will stay the same - same amount of energy = same amount of fuel, albeit with a smaller press on the loud pedal.
If you add extra fueling to a diesel engine, above what it requires to maintain a constant vehicle speed, then you accelerate.
However, since drag isn't linear, if you start using the extra performance you'll get significantly worse economy... driving it at 75mph instead of 65mph for example.
Hope that helps,
The more air you stuff into a diesel the higher goes the effective compression ratio and the more efficient it becomes.
Method:
Raise turbo boost pressure (tighten wastegate rod)
Reduce air-charge temperature (BIG intercooler)
Should be a good start.
Dont touch turbo rod on Disco TD5s but OK on Defender TD5.
CharlesY
Method:
Raise turbo boost pressure (tighten wastegate rod)
Reduce air-charge temperature (BIG intercooler)
Should be a good start.
Dont touch turbo rod on Disco TD5s but OK on Defender TD5.
CharlesY
Manxman
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Any suggestions as to where to get a big intercooler without breaking the bank or do I need to bite the bullet and raid the piggy bank?
TheMunster
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