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Home > Help Needed / General Tech Chat > MPi turbo mirage woes

Steve220

29 Posts
Member #: 11017
Member

Shropshire

Hi all, looking for a bit of advice if possible.

Creating an MPi turbo with a GT17 and a mirage manifold. Did a test run of the set up on the block and head before it gets sent off for the engineering work but I've stumbled upon an issue with block clearance.







Has anyone come across this before? If so, how've you gone about it?
Regards and thanks
Steve


Turbo Phil

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4125 Posts
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My sister is so fit I won't show anyone her picture

Lake District

I'm pretty sure it was Simon (MadMK1) that had this issue. He ground some of the block away to provide clearance. Have a look through his build thread.

Phil.

WWW.TURBO-MINI.COM


Steve220

29 Posts
Member #: 11017
Member

Shropshire

Hi Phil,

Thanks for getting back to me. The issue I have is the cam sensor mount and sensor itself will be in the way and I'm reluctant to grind it away if I can prevent it.


Tom Fenton
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15077 Posts
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Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner

&

TM legend.

Rotherham South Yorkshire

Is it actually clear or not? Cannot tell from pictures. Either relieve the block or move the turbo its as simple as that! Remember the head gasket when fitted will move it up a touch.


On 29th Nov, 2016 madmk1 said:


On 28th Nov, 2016 Rob Gavin said:
I refuse to pay for anything else


Like fuel 😂😂


Rod S

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5717 Posts
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Formally Retired

Rural Suffolk

On 20th Apr, 2017 Steve220 said:
The issue I have is the cam sensor mount and sensor itself will be in the way and I'm reluctant to grind it away if I can prevent it.

Are you intending to use the OEM cam sensor ?
The "mount" is just the original mechanical fuel pump mounting position, usually just blanked or used as a turbo oil return, it was just on the MPI they used that hole for the phase sensor (with a modified fuel pump lobe on the cam).
So, unless you are intending to run an ECU that needs that particular sensor along with the modified lobe on the MPI cam surely you can just remove it and fit the usual blanking plate (or turbo oil return) ? Neither of them should get in the way.

Schrödinger's cat - so which one am I ???


evolotion

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Glasgow, Scotland

as its at the retaining side of the sensor you can likely shave a lot of material and use a counter sunk screw for retention, and shave a little off the turbo, and elongate the turbo-manifold holes and rotate it slightly etcetc, all this will add up as you only need to find a couple of mm.

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.


Nic

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First mini turbo to get in the 12's & site perv

Herefordshire

Hi Steve,
As pointed out above, try it in position with all of the gaskets in place, rotate the compressor housing into the correct position, and then see how much clearance you have.

I had to relieve the block and the compressor housing to gain a few mm of clearance.
Just don't get too carried away grinding chunks off!!!!

On 20th Jan, 2010 kal14 said:

grow up you fool .


Steve220

29 Posts
Member #: 11017
Member

Shropshire

Hi all,

Thank you for getting back to me. The inlet will be an SC 5 port system and from what they've told me, i'll need the cam sensor. I'll give it another play tomorrow with the old gaskets on to see if there's much different. The other option i thought about was to re-position the turbo flange, I know there's not a great deal of room back there, but if I have to add a small turbo box to the shell then so be it.


Sprocket

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Preston On The Brook

Use a crank sensor in there intead, much more compact

On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be...
So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'...


On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........


jonny f

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Dorking

Could you not just use a crank sensor on the crank?

Also it doesn't look like a gt17 turbo.

Edited by jonny f on 21st Apr, 2017.


Steve220

29 Posts
Member #: 11017
Member

Shropshire




On 21st Apr, 2017 jonny f said:
Could you not just use a crank sensor on the crank?

Also it doesn't look like a gt17 turbo.


What turbo size does it look like?


Sprocket

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Preston On The Brook

Looks more like a T2 or similar

On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be...
So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'...


On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........


Sprocket

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Preston On The Brook

What is the difference between the SC MPi and SPi set up.............. It's the same hardware is it not?

On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be...
So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'...


On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........


jonny f

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Dorking

Gt17 has a 3 bolt round outlet to downpipe and a bolted on compressor housing.

http://m.ebay.co.uk/itm/for-Saab-9-5-9-3-2...4%257Ciid%253A1


Will

118 Posts
Member #: 11091
Advanced Member

MPI block has a camshaft position sensor and no fuel pump hole
the camshaft position sensor is in a similar location to the fuel pump but higher up

standard A+ and SPI blocks are the same casting

other MPI block differences include no dizzy hole, the oil filter screws straight to the block and there's a few more sensors (ie. factory oil temp sender etc.)

On 21st Apr, 2017 Sprocket said:
What is the difference between the SC MPi and SPi set up.............. It's the same hardware is it not?


Turbo Phil

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4125 Posts
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My sister is so fit I won't show anyone her picture

Lake District

On 22nd Apr, 2017 Will said:
MPI block has a camshaft position sensor and no fuel pump hole
the camshaft position sensor is in a similar location to the fuel pump but higher up

standard A+ and SPI blocks are the same casting

other MPI block differences include no dizzy hole, the oil filter screws straight to the block and there's a few more sensors (ie. factory oil temp sender etc.)

On 21st Apr, 2017 Sprocket said:
What is the difference between the SC MPi and SPi set up.............. It's the same hardware is it not?


I don't think that's what he was asking.....

WWW.TURBO-MINI.COM


Steve220

29 Posts
Member #: 11017
Member

Shropshire




On 22nd Apr, 2017 jonny f said:
Gt17 has a 3 bolt round outlet to downpipe and a bolted on compressor housing.

http://m.ebay.co.uk/itm/for-Saab-9-5-9-3-2...4%257Ciid%253A1


Interesting! Looks like a future purchase. Out of curiosity, how well does a GT15 work on a 1275/1293?


John

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Topping Geezer

Barnsley, South Flatcapshire

Not wanting to upset you but doesn't look like a mirage manifold to me either.

If something is worth doing, it's worth doing half of.


Steve220

29 Posts
Member #: 11017
Member

Shropshire



On 23rd Apr, 2017 John said:
Not wanting to upset you but doesn't look like a mirage manifold to me either.


Doesn't upset me, the manifold fits and seems to be done nicely. Just wish the turbo was sitting right! From looking back through posts it looks like it is indeed a T2. Are these much bigger than the GT17?

Edited by Steve220 on 23rd Apr, 2017.


madmk1

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Double hard bastard

brookwood woking

I just attacked the block with the grinder, make sure you have a head gasket on also,

I found out after I got a new head that the old one had a lot skimmed of it which was making stuff hard also.

All things that just get in the way.

Nothing is impossible it just costs more and takes longer.

On 1st Nov, 2007 Ben H said:
There is no such thing as 'insignificant weight saving', it all adds up.


madmk1

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5284 Posts
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Double hard bastard

brookwood woking

Also a manifold gasket will change stuff

Nothing is impossible it just costs more and takes longer.

On 1st Nov, 2007 Ben H said:
There is no such thing as 'insignificant weight saving', it all adds up.


Sprocket

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Preston On The Brook

head gasket, manifold gasket, turbo gasket.... that will all stack up

On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be...
So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'...


On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........

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