2.25D to 200tdi - keep the turbo or not?

I have a 2.25 diesel and have aquired a 200tdi with all ancillaries. I know it's more or less a straight replacement and is easier with the turbo off. That aside, should I keep it or not? I've heard that the turbo version could rip through the series gearbox and prop shafts and a non turbo is the preferred option.

What are you opinions?

Lots of pros and cons. Without turbo it gives around 80 bhp which is quite a nice upgrade from a 2 1/4. Halfshafts are the weak link in the drive chain, a series box in good nick copes ok with or without turbo.

111bhp (more if you tweak) is a lot on drum brakes unless you have 11" tls. It's a noisy engine without the turbo though and either option you'll want an overdrive or rangie diffs

I have the 3" wide brakes/6 cylinder axle on the front and 11" dia brakes/Salisbury axle on the rear, so stopping is not a problem.

Also, got overdrive fitted already.

Will/do I need 111 bhp? Don't really want to go fast. Just want a bit more acceleration and when I start at the bottom of a hill at 60mph, I still want to be doing 60mph when I get to the top and not 25/30mph!

I found that pulling away on a hill was the only real time I lagged behind those with blowers. 70mph on the flat no problem.

Depends what you want really, plenty of low down grunt with a di but ya wont win any medals at the lights.

I fitted mine as a DI (I also had a 2.25d)...glad I did keeps it simple (less to go wrong) and in keeping with a series motor,

Mines in an SWB and has loads of power...35mpg on my short run to work every day...better on a run,

I did have an o/d but sold that and fitted h/r diffs as it will pull them with ease...starts in second ever time.

Nick.

P.S....got £60 on ebay for the blower.

I would keep the turbo. My SIII with overdrive, higher ratio diffs and 109" front axle, was a pleasure to drive on motorways after changing the diffs.

I think that there may be another good reason to keep it, but I'm happy to be corrected. The turbo has a thin pipe that connects to a t piece and then on to the injector pump and wastegate. It's job is partly to tell the fuel pump to deliver more fuel once a certain boost pressure arrives. My hunch is that the pump is designed for the turbo engine and won't deliver enough fuel at higher revs without that signal. So you'll not only be down on power without the boost, but also through under supply of fuel. That could be utter bollocks, but when the pipe split on mine, that lack of extra fuel crippled it.

Although I'm very techy, I haven't looked into it because I loathe diesel engines in cars. My project car is going to be petrol powered, so I'll never need to know how a diesel fuel system works!

boguing said:

I would keep the turbo. My SIII with overdrive, higher ratio diffs and 109" front axle, was a pleasure to drive on motorways after changing the diffs.

I think that there may be another good reason to keep it, but I'm happy to be corrected. The turbo has a thin pipe that connects to a t piece and then on to the fuel pump and wastegate. It's job is partly to tell the fuel pump to deliver more fuel once a certain boost pressure arrives. My hunch is that the pump is designed for the turbo engine and won't deliver enough fuel at higher revs without that signal. So you'll not only be down on power without the boost, but also through under supply of fuel. That could be utter bollocks, but when the pipe split on mine, that lack of extra fuel crippled it.

Although I'm very techy, I haven't looked into it because I loathe diesel engines in cars. My project car is going to be petrol powered, so I'll never need to know how a diesel fuel system works!

Click to expand...

It increases fueling as the boost pressure increases. Without boost there's no need for increased fueling

I've gone for the DI installation. I'm not looking looking for great acceleration and speed, just want to maintain speed up hills and with head winds!

Also, the engine and drives should last longer (or so I hear).

Thanks for your input though

You wont be disappointed...have you got an exhaust manifold for it????

Nick.

I've kept the original 200 tdi manifold, made a flange to mate up with it and custom welded exhaust to marry up with the orignal exhaust halfway down the down pipe.

Sounds good...always pop the turbo on in future then.

Nick
can you explain how you kept the battery and aircleaner still under the bonnet, Ive got twin tanks on mine and moving battery under passenger seat not an option
cheers

Yes of course.... used the smaller battery of the disco I got the 200 from...the allowed me to chop down the battery carrier,

I had to make new legs for it,

If you send me your email address I will send you some pictures....its worth the effort...keeps the engine bay looking more like it should do....

Nick.

Thanks

just sent a pm

cheers

OK, another question. Use the oil bath filter or the discovery one?..pro's and con's please.

Oil bath very in keeping with a series and a very good filter,

See my post further up if more info req.

Nick.