MPi turbo mirage woes
Turbo Mini Forums

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

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

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.

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.

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

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.

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!!!!

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.

Use a crank sensor in there intead, much more compact

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.

Looks more like a T2 or similar

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

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

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.)

WWW.TURBO-MINI.COM

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.

Edited by Steve220 on 23rd Apr, 2017.

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.

I have started posting on Instagram also my name on there is turbomk1golf

Nothing is impossible it just costs more and takes longer.

Also a manifold gasket will change stuff

I have started posting on Instagram also my name on there is turbomk1golf

Nothing is impossible it just costs more and takes longer.

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