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Author Subject: Why the offset turbo charger??
talbotsteve

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Location: millom

Registered: 06 Dec 2003

Posts: 335

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Post #1
I've noticed almost all turbo conversions go down the route of the T16 type manifold with the turbo sat over the gearbox more or less, why is this? Is it just that there is no room behind the engine?
The TD's seem to have no problem with room, surely a hybrid gti6 flange and sliced td manifold would fit down there? then you could use a td down pipe.
Wouldn't this be a lot cheaper than the big expensive manifold?

Just askingThumbs up
Steve.

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Posted 22nd Nov 2012 at 23:07
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JWP EFi

Turbo Legend!

Location: edinburgh

Registered: 07 Mar 2010

Posts: 2,163

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Post #2
there just isnt the space behind the engine, TD uses 'log' type manifold and very small turbos

TD downpipe would be way to restrictive
Posted 22nd Nov 2012 at 23:13
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welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,839

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Post #3
no room indeed.

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Posted 22nd Nov 2012 at 23:19
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dcc

Senior User

Location: Wales

Registered: 24 Feb 2009

Posts: 502

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Post #4
MAKE ROOM

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205 GTI
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Posted 22nd Nov 2012 at 23:20
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rikky 🦔

Location: cheshire

Registered: 28 Feb 2004

Posts: 26,796

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Post #5
you ever changed a 306 hdi turbo? LOL

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Posted 22nd Nov 2012 at 23:21
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JWP EFi

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Post #6
rikky wrote:
you ever changed a 306 hdi turbo? LOL


Yes
Posted 22nd Nov 2012 at 23:21
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pete_rallye

Seasoned Pro

Location: Yorkshire

Registered: 12 Dec 2002

Posts: 5,253

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Post #7
Are all the XD engines single cam? I know my old HDi DTurbo was and the single cam head leaves a fair bit of room behind it compared to a twin cam, plus the manifold is a bag of s**t, if you want anything half decent you'd need a lot more space.

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Posted 22nd Nov 2012 at 23:31
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rikky 🦔

Location: cheshire

Registered: 28 Feb 2004

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Post #8
not sure, my hdi is single cam but it was still tight behind the head. it'd have been miles easier to do otherwise. then again it wasn't hugely hard but space is so tight you end up removing quite a bit. inlet out and engine off the top mount to push it forward enough for removing all the manifold and exhaust studs.

some people do it from underneath, atleast once it's rocked forward you can see what's what. bad job though. 4hrs approx but some head scratching took the time too

________________________________________

306 rallye reproduction decals (full sets/individual decals) | 306 b-pillar textured vinyl weatherstrips
306 slam panel esso stickers | 306 yellow / orange / pension fund red side door badges
gti6 inlet manifold badges | 306 rear boot badges (p2/p3)
winner of Extraction of toys from prams with outstanding vigour award 2009 [source: gti6 owners club]
Posted 22nd Nov 2012 at 23:46
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rikky 🦔

Location: cheshire

Registered: 28 Feb 2004

Posts: 26,796

Status: Offline
Post #9
the turbo is only a little Garrett m9 too

________________________________________

306 rallye reproduction decals (full sets/individual decals) | 306 b-pillar textured vinyl weatherstrips
306 slam panel esso stickers | 306 yellow / orange / pension fund red side door badges
gti6 inlet manifold badges | 306 rear boot badges (p2/p3)
winner of Extraction of toys from prams with outstanding vigour award 2009 [source: gti6 owners club]
Posted 22nd Nov 2012 at 23:47
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JWP EFi

Turbo Legend!

Location: edinburgh

Registered: 07 Mar 2010

Posts: 2,163

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Post #10
i suppose if you were to turbo a GTi6'd 205 then it would be a little easier as theres a little bit more

space between engine and bulkhead, but not much more!

even the 406 8v turbo conversion has clearance issues and thats still with a small turbo, iirc you

have to extend the bottom mount by 10mm, which isnt an ideal way to do it
Posted 22nd Nov 2012 at 23:52
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JWP EFi

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Registered: 07 Mar 2010

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Post #11
...and on the 306 you have to cut (i did) the 'rib'that runs along the bulkhead for the turbo to clear

even after doing that you could only just get your fingers between them
Posted 22nd Nov 2012 at 23:58
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talbotsteve

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Location: millom

Registered: 06 Dec 2003

Posts: 335

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Post #12
There are flange conversions to fit td04's to the td manifolds using the std down pipe ect.
So space is tight but not impossible.
Mmmmmmm.
I was looking at the other thread re the s16 turbo and he runs a stock bottom end/headgasket up to 250bhp on low boost.
That would do....wouldn't it, if it was a 1.8 bottom end?

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Posted 23rd Nov 2012 at 00:20
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JWP EFi

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Location: edinburgh

Registered: 07 Mar 2010

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Post #13
no one said it was impossible, in fact theres a video on youtube somewhere of a Brazilian (i think)

chap who mounted a T4 behind the engine in a Xsara VTS
Posted 23rd Nov 2012 at 22:02
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JWP EFi

Turbo Legend!

Location: edinburgh

Registered: 07 Mar 2010

Posts: 2,163

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Post #14
'xsara vts 98 turbo'

worth a look, and he used standard ecu
Posted 23rd Nov 2012 at 22:04
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JWP EFi

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Location: edinburgh

Registered: 07 Mar 2010

Posts: 2,163

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Post #15
http://www.youtube.com/watch?feature=player_detailpage&v=RvXDPLi8IVA
Posted 23rd Nov 2012 at 22:08
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