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Upcoming MPI Swap Thread - 1989 TSi


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#21 Woody

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Posted 17 May 2017 - 07:28 PM

Five O Motorsport also do a direct bosch replacement with low impedance. They informed me yesterday. I stuck with the Delphi though.
www.sweetfrostings.com.au





#22 Matt888

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Posted 19 August 2017 - 04:43 PM

85 lb Delphis on order, flow matched set.  Ordered them through Racetronix.

What's going on with picture hosting these days?  Looks like Photobucket really hosed everyone.  We lost alot of historical data pics on this site and others.  Sucks!



#23 Matt888

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Posted 19 August 2017 - 04:48 PM

Attached File  IMG_8463.JPG   163.41K   42 downloads

Some progress.  Cleaned up the manifold, high temp painted with blue MPI lettering detail, put a new throttle body gasket on.  Waiting on injectors and need to order an Aeromotive FPR shortly.  

Anything I needto know about the thermostat area... do I need a new gasket, thermostat part #?  Thanks!

Edited by Matt888, 19 August 2017 - 04:52 PM.


#24 importwarrior

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Posted 19 August 2017 - 07:26 PM

http://www.starquest...ic=26099&st=160

Read page 9 and 10. The link above goes to page 9.
The link above says a lot about the t stat housing and possible clearance issue.

B-71 87 TSI ~ RIP

Black 87 Starion ~ Mess SOLD!!!

Proud New 89 slightly Rusted Fiji Owner !!!




#25 Matt888

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Posted 20 August 2017 - 09:47 AM

Thanks for the link!  I believe I will have enough clearance for the radiator hose off the thermostat because Chad did my intake and it appears to be like the one shown in the picture below.  I don't know who's car it is... some guy in Orlando.  I won't really know until I put the intake pipe on.  

I know it's a long shot, but does anyone know what hose (part # or from what car) it is in the picture below?  It has a slight bend to it, but nothing as aggressive as our stock hose does.  The one in the pic below looks perfect.

Attached Files


Edited by Matt888, 20 August 2017 - 09:49 AM.


#26 Chad

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Posted 20 August 2017 - 02:06 PM

You can use a thermostat neck from an 83-87 car, they are shorter and pointed more towards the radiator.  the 88-89 necks pictured are really long and poorly aimed for MPI.  you should be able to use a stock hose on it if your radiator is stock, or stock-dimension aftermarket.

#27 Matt888

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Posted 20 August 2017 - 04:44 PM

View PostChad, on 20 August 2017 - 02:06 PM, said:

You can use a thermostat neck from an 83-87 car, they are shorter and pointed more towards the radiator.  the 88-89 necks pictured are really long and poorly aimed for MPI.  you should be able to use a stock hose on it if your radiator is stock, or stock-dimension aftermarket.

Thanks Chad!

Edited by Matt888, 20 August 2017 - 04:46 PM.


#28 Matt888

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Posted 25 August 2017 - 05:30 PM

Ok, received the 83-87 thermo neck.  Looks like it's all pretty tight between the AN fittings, intake, thermo neck but won't know for sure until I actually start installing on car and tightening things up.  Second pic definitely indicates to me that I have to rethink the fuel rail fitting.  The original plan was to go from AN fitting to AN 90 degree fitting but that will definitely interfere with the firewall.  In my mind, the only chance I have for clearance is a low profile fitting ( 90 degree?) that converts my 1/4" NPT rail thread to 6 AN.  That's the side of the rail that I will run the fuel supply.  The front of the rail will go to the FPR.
Attached File  IMG_8498.JPG   120.7K   40 downloads


Edited by Matt888, 25 August 2017 - 05:33 PM.


#29 Matt888

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Posted 25 August 2017 - 05:37 PM

Firewall side fuel rail

Attached File  IMG_8503.JPG   25.03K   26 downloads

#30 Matt888

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Posted 26 August 2017 - 08:04 AM

Question:  My 88-89 thermostat neck has a coolant hose fitting that goes to the turbo.  The 83 style thermostat does not!  What have others done with that situation?

#31 importwarrior

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Posted 26 August 2017 - 10:16 AM

I would just buy an aluminum bung weld it on top.
Or

On the bottom side under the thermostat is a hood spot to weld a bung also. Bottom side.
Posted Image

B-71 87 TSI ~ RIP

Black 87 Starion ~ Mess SOLD!!!

Proud New 89 slightly Rusted Fiji Owner !!!




#32 Matt888

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Posted 26 August 2017 - 06:42 PM

Maybe I can get away with using my 89 thermostat neck.  Some of these concerns are difficult to resolve without just getting into the build.  Another issue I potentially see is the stock throttle cable comes off the firewall and makes about a 90 degree hard turn towards the passenger side, then wraps around back towards the driver side to the stock TBI.  The MPI intake has a bracket for the throttle cable on the driver's side and ideally, you'd come directly straight out of the firewall and to this bracket.  Anyone have any details on what others have done?  Please tell me we don't need a completely new throttle cable!

#33 Chad

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Posted 26 August 2017 - 11:13 PM

Cable will reach just fine. Almost all running MPI cars are setup this way, never heard of a problem after long term use.   An 84-87 water neck has the turbo coolant lines, and I think the 83's should have that line also, unless those turbos were oil cooled.  It may have been a G54B non-turbo neck you got.

#34 Matt888

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Posted 27 August 2017 - 09:23 AM

So, the 83-87 thermostat covers do in-fact point more towards thee radiator, but they don't have the additional tube to send coolant to the turbo.  Strange.  I may not worry about it too much until I start the install.  Can't tell what will interfere since my intake pipe actually comes across the front of the block and connects into the stock intercooler.  Most people that go MPI completely redo their whole intercooler plumbing, but I will initially use an intake pipe made to minimize plumbing changes.  The downside is it adds interference issues near the thermostat housing further.  Here's two pics below of the difference between an 88-89 thermostat housing and the 84-87 housing.

Attached Files



#35 Matt888

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Posted 27 August 2017 - 09:47 AM

Low and behold, searched further and found this pic in the link below.  Chad was right.  Now to find that thermostat housing on the left!

By the way, why does it say that my picture uploads have to be smaller than 11k bytes now?  That's ridiculously small.

http://www.starquest...howtopic=152189

#36 Matt888

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Posted 07 October 2017 - 11:41 AM

This forum's  pic uploading capabilities are the worst.  It says my pics have to be smaller than 11k... that aint going to work.

But anyways, I've removed the stock manifold today.  I have a coolant hose that used to go to the backside of the stock manifold, but my modified magna does not have a connection port for it.  Any ideas while I try to upload a pic somehow?

Edited by Matt888, 07 October 2017 - 01:24 PM.


#37 importwarrior

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Posted 08 October 2017 - 09:55 AM

http://www.starquest...pic=84987&st=40

Maybe the link will help.

B-71 87 TSI ~ RIP

Black 87 Starion ~ Mess SOLD!!!

Proud New 89 slightly Rusted Fiji Owner !!!




#38 BuGG

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Posted 08 October 2017 - 10:24 AM

http://www.starquest...ic=26099&st=160
Posted Image

#39 Matt888

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Posted 08 October 2017 - 02:55 PM

Guys, those links help alot but I capped off that coolant line and installed the manifold today.  I didn't have a provision on my intake for that connection and read it could be capped.  So now I have to tear apart my build and start over?  Ouch, not cool (no pun intended)!

#40 Matt888

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Posted 08 October 2017 - 03:06 PM

Posted Image

I'm going to have to walk away from this for a while if I need to tear this all back out.  Somehow I missed that coolant hose routing back to the front and with no connection on my modified magna, figured it was not needed.




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