Turbocharging mk5 2.5 di

[emdc]

Good afternoon boys and girls

Hoping some of the more technically minded amongst you will be able to help me out. I have a 2000 (mk5) with the 2.5 di rated at 85ps.

I want to up the power a bit in order to make towing a race car slightly less comical.

Just a few burning questions, as I don't know a huge deal about turbochargers.

My manifold is a straight one, not a banana, by the way.

I've seen a few turbos and manifolds on the Bay of E, which look like they'll fit. But I'm not sure.

So if you could help me out with the following, I'd appreciate it

- Is fitting a turbo a simple bolt-on job (obviously with oil feeds and intercoolers) or will timing need to be advanced/retarded? (stop giggling at the back)

- Is the CR low enough to handle a mild blowing on?

- The ones on fleabay are from the MK6, rated at 90ps. Will the Mk6 ones fit the mk5? The manifolds look exactly the same (pipe fitting, feeding and fabrication is not a problem)

- Whats the deal with the different power ratings advertised?

The 90PS, for example

http://www.ebay.co.uk/itm/2000-2006-For ... 27f5511cf8

...presumably that comes off a 90PS engine, and presumably it'll make more power than 90PS on my 85PS engine, which suggests the n/a power rating of the engine it came off would be a lot lower, ie the engine was designed to make only 90 with the turbo? Is this right or am I completely barking up the wrong tree?

I'd like to hope that a turbocharger will make more than a measly 4bhp!!

It is my understanding that, given the correct manifold, any turbo can be made to fit any engine, but obviously going too big means massive lag, which I don't want to do.

As I said, any help would be greatly appreciated.

Ta very much

emdc


-

[jay]

mk6 one wont fit a mk5 Di... are u sure its 85ps?? non turbo are 76 or 70ps..or do u mean u have a 85ps turbo diesel already..fitting a diffrent turbo to the std one will bring on red light if its epic pumped

[emdc]

Nah, definitely n/a. I got 85ps from literature lying arounf the interweb.

So I need to find a turbo off a mk5 then.

Righto. Ta very much

[MinorMatt]

non bananna non turbo is 70PS (hp) and a turbo setup will bolt straight on to the N/A engine without problems - but remember the exhaust is different too.

[acarpen9]

Rather than buying the bits you need in parts you might find it more economical to buy a complete 2.5TD engine for around 300 notes including all ancillaries.
Then you can swap over manifold, injectors, sump, etc.. and still have a bare engine with injector pump, starter motor, alternator, PS pump left over.

As stated above, if yours is 85ps its a turbo engine n/a is 70 and 76ps, Turbo's are 85ps or 100ps. Obviously the 100ps is far more desirable if you can source one. A check of the injector numbers will show you what engine it is

[F111ORY]

Hi, There are other ways. Try this

viewtopic.php?f=4&t=136339&hilit=DIY+turbo

Then just turn up the fuel on your existing fuel pump.

[Kedishen]

You will want:

Turbo manifold + turbo
Turbo sump, or at least the return pipe and make your own hole in current sump.
inlet manifold + piping to turbo
Air filter housing and piping
oil supply pipe to turbo (u will need to tap a hole in side of block to get oil, its the blank just below exhaust manifold
Exhaust downpipe (centre box would be useful}

[emdc]

Excellent.

Thanks for all the replies gents.

[emdc]

non bananna non turbo is 70PS (hp) and a turbo setup will bolt straight on to the N/A engine without problems - but remember the exhaust is different too.

Thanks Matt.

Mine will be the 70ps then

So, that MK6 turbo/manifold I posted will bolt straight on to my engine? Just making sure I understand you right...

Fabricating new exhaust and oil feed/drain pipes is no problem.

Ta

[Altransit]

Mk6 parts won't fit a Mk5, as the engines are different. You need a MK5 turbo (etc) to upgrade yours

[blizard]

as stated, score a running engine with a wired Bosch pump. Search also for a LDV, these 2.5TD are the same, could be cheaper.
Perhaps a member had one on the (iron) shelf

[MinorMatt]

You need a mk4 or 5 turbo

[emdc]

Cool.

Cheers lads. Glad that's cleared up.

Though I do kinda like the idea of engineering (read "bastardising"), a Mk5 fannymold to take a big-ish turbo

Food for thought indeed. Ta gents.

[jay]

well anything is possible if you good at welding u can make a manifold to fit a big turbo..

[Jim Archer]

Bear in mind the stock 'small' turbo is near perfectly matched to the motor, so gives good boost from low down in the revs and little or no lag, and can provide more airflow than the stock intake plumbing can usefully handle. Even cruise throttle provides some decent boost pressure.

Start pushing more air about and you'll need a mahoosive charge cooler to gain any benefit, and that adds volume, which adds to any lag the 'bigger' turbo suffers.

These old motors were reknowned for their instant whallop regardless of revs, so you might gain some topend, but could lose out in the bit you drive around in most.

Jim