none at all.....none wot so ever
td aint that good,d would be even worser
fenby1976
New Member
I think I can see where you're coming from with this: Trying to make the engine more reliable? I've read that it works well on 200Tdis fitted to series Land-Rovers as it stops the gearbox from blowing up. So it should work O.K. with the older 2.5TD too. I talked to a fuel injection specialist about it because I was wandering if the fuelling would be messed up if the turbo was removed, but he said that the fuel pump monitors the turbo boost and alters the fuelling accordingly, so if there is no boost it would be fine. I would imagine that the 2.5TD engine has a lower compression ratio than the 2.5NA engine so a 2.5(un)TD engine would probably not work quite so well.
jai_landrover
Well-Known Member
Almost but no cigar!
Actually not true the td has different pistons and compression ratio probably slightly modded head too they are not identical engines by any means they used many parts i.e block and crank but they are different you cannot just bolt on a TD turbo and in its not that simple! land rover needed a competitive turbo engine to compete with jap stuff but they had no money so they took the overly strong and reliable 12j engine and changed what they needed too. the td was brought out before intercoolers were even thought of add an intercooler to a TD and see the differance its amazing! Jai
jai_landrover
Well-Known Member
you will lose lots of performance and actually have an engine with less power than a na
discomania
Well-Known Member
No Odenne is exactly right. The TD IS an NA with a different manifold (for the turbo), and a different injection pump. That is it, end of story.
The pistons, the head, the bore the stroke, compression ratio ITS ALL THE SAME.
You CAN just bolt on a turbo (thats all land rover did too and added an IP with vac boost!), it would give you slightly better economey as the fuel would get more air to burn with.
In the same respect you can take the turbo off and make the engine a bit more reliable and as its now less stressed will last longer.
discomania
Well-Known Member
How do you figure this?
discomania
Well-Known Member
A few ways of looking at this. Leave it and if the turbo ever failed then remove it and live without it.
Take the turbo off now, and let your engine spend the rest of its days in a more relaxed setup. If you remove the turbo, your injection pump will throw in max fuel but will never obvioulsly throw in boost fuel again. The fueling will be slightly more on a TD pump, so you may notice a little black smoke when you floor it. Or you can decrease max fuel. Because of this the TD pump with no turbo will give you slightly more power than a NA pump would (unless it was tweaked). I have a TD pump on my NA and it did make a difference and the bit of extra smoke was not MOT failure stuff.
hughesy
Well-Known Member
Having owned a 12J and a 19J at the same time I reckon the 19J is not an improvement. It isn't actually faster than a non turbo job, just runs hotter and makes you feel like it wants to die at any moment when you're caning it down the dual carriageway at 70mph. I'd choose the non turbo version anyday. I think the td has a slightly lower compression ratio to make allowance for the extra stress the turbo puts on it so removing the turbo will result in an even sadder engine. What I'd do is thrash it till it dies then bung a 200tdi in. The extra 5 mpg or so will pay for it in no time.
discomania
Well-Known Member
You would think it hughesy but its not, its the same, a contributing factor to why they blow up. As they are the same engine with the same pistons, stroke, bore, head, block, then the ratio will be the same too.
"Diesel manual - 1979-1993" says so, haynes too, and rave - I had reason to look it up some time ago and its stuck in my head.
"Diesel manual - 1979-1993" says so, haynes too, and rave - I had reason to look it up some time ago and its stuck in my head.
hughesy
Well-Known Member
Okeedoke I'll take your word for it. Like most things LR it don't make a lot of sense does it
there must have been something wrong with that TD engine, a good TD will perform better than a badly looked after 200 any day of the week - and the difference between a 12J and 19J engined vehicle is very noticable
as with any engine if you don't look after them dont expect much from them - this is very applicable to the TD
the blocks of the later TD are also different - but possibly backwards compatible - additional strengthening was added
