924Board.org

[Mike9311]

[Cedric]

Yes, welded in place, Trendab motorsport will help me with that aswell. I cant get into mittelmotor website, can you? On their page there are several pics on how it looks when welded into place,.but i couldn't get the link.
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1980 924 Turbo
www.instagram.com/garagecedric/

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[Mike9311]

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1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car

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Ah, remember that picture.
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/Magnus, Stockholm Sweden
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Porsche 924 -79 NA, EFI and Turbo.
Porsche 931 -79
Porsche 911 -77, 3.2 Targa
Porsche 911 -69, 3.6, Coupe

[Cedric]

The complete bottom end is now home again, very nice. 87mm omega pistons, ARP rod bolts with remachined big ends, balanced crank, machined deck surface etc. Also the oil pan got its baffle welded in, simple thing but im glad i didnt have to weld it in.

Also started working on my DiY flow test rig, for testing the pressure drop over different components. It was a good oportunity when i had all my piping available, and a spare air box (which i might mod a bit furter on). Volume flow measurment is done by measruing speed in the inlet pipe, thats the idea at least. Seems to work ok but need more data to be sure of what Im doing

How could i live my life without a 3D printer







:
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1980 924 Turbo
www.instagram.com/garagecedric/

[Cedric]

Thanks to my friends we got the engine out finally, which is very nice. So now I can finally start disassembly, so i can get the parts of that needs to be transfered to the other engine, like intake, exhaust, oil pump etc.

Since theres at least on out there interested in whay i do with my flow test rig i add a little update, i have update the measurment system a little bit, so now i thought it was time for a test. The painful edge in the boost pipe where the ic piping meets the original cast boost pipes has always is a thing we have been discussing here before. Now i thought it was time to test me alternative printed lower charge pipe and a printed rounded insert to the standard pipe.







Motor ut och påbörjad rensning av bitarna.





This was only the cast pipes, with and without insert.


Then i tried the complete IC to throttle piping, with and without insert, measurment wasnt as tidy, need to sort my flow regulation (which is ducttape at the moment) but gives me good data. The yellow line is the pipe between the compressor and IC. If i remember correctly the massflow was around max 4,3 m3/min in my simulation model (after the compressor), albeit alot higher density, which will affect the absolute numbers.

Not that interesting to most people, but useful and fun for me, especially as I continue the work with the airbox later on. Im glad the very simple test rig setup seems can actually be used for evaluating stuff. And since in my professional background, the demands on system like this was part of my job, its a bit funny to finally getting a grip on my own stuff


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1980 924 Turbo
www.instagram.com/garagecedric/

[morghen]

Fantastic work!
Hat off to one of the best educated personal projects out there.

Thanks for sharing!
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https://www.the924.com

[Mike9311]

+1 Bigtime! Love it and thanks for sharing!
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1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car

[Fasteddie313]

Does that mean that the conical lower boost pipe insert resulted in noticeably less pressure drop?

It makes a good bit of difference?
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80 Turbo - Slightly Modified

[Cedric]

[Mike9311]

Just wanted to plant this test idea in your head for when you have time to spare. Internal guided vanes which would work especially nice with 3D printing. Obviously where it might make sense (tights bends, etc)
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1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car

[Cedric]

[Cedric]

The project is creeping forward in snail pace, everytime i start working with is i discover some new things i have to deal with. Like the manifold that needed machining to get flat, and rewelding a crack, then nothing fit the engine anymore, and several other things that popes up one after another.

Anyway, the engine is pretty much complete, would need to get my engine crane over here soon so i can fit up the clutch and flywheel. Slowly getting there.

I also sold my old DIY coil over setup to another 924 that is track driven, i hope he will enjoy them. So therefore I had to order a new set, i chose to test the GAZ gold, but with an extended stroke of about 1", they dont do metric there . What they offer of the shelf is way to short, and pretty much gives you no way of chosing rideheight and still have full suspenition travel, not a good choice. Howver, modifying the dimension is included in the standard pricing, so thanks for Larkspeeed for handling my slightly complicated order, and also the quick turnaround when they sent me struts with the wrong stroke the first time

I will start with the same springs as today, 350lbs up front and 28mm bars at the rear, to test out the dampers in the same conditions. And then i also ordered some stiffer springs (425lbs i think), and some additional weak rear springs to balance things out.

Regarding the boost pipe i fiddled with before. I made a template, ported it out (see the picture how much i removed. And then printed an adapter to stick in the 2inch pipe. This will be much better both flow and space wise compared to my old 2,5" setup.



Will put a hose over it later, and also i will need to squeeze the pipe in a vice to make it fit, although less than before.


New suspension from GAZ, the top pic has the correct stroke.


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1980 924 Turbo
www.instagram.com/garagecedric/

[morghen]

Gonna be a kickass 924 this spring when you take it out on the street
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https://www.the924.com