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Project black 924 :)
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DutchPug  



Joined: 27 Jul 2008
Posts: 94
Location: the Netherlands

PostPosted: Wed Jul 24, 2013 8:43 am    Post subject: Project black 924 :) Reply with quote

Since there is no project section, thought to post it here.

As some of you might know, I had a turbo conversion on the stock engine of my green 924... then swapped it for a 968 engine. I never really made an effort to sell the parts and for some time it has been bothering me that these parts were just collecting dust...

So, bought myself a cheap one from 1982 to have some fun with.

Here how i got it; needed new tires, new alternator brackets, door handle, exhaust, brakes, and some other small issues addressed.


Now with new tires and coated wheels;


Thought it would be nice to see what power it makes now in completely stock form;





95 at the wheels after 31 years is not too bad i recon.... the engine from the green 924 made 92 whp after going efi and dyno tuning...

Todo in the next few weeks / month; efi conversion (Vems), coilovers (GAZ gha) and the turbo conversion.
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Arvidw  



Joined: 20 Sep 2009
Posts: 227
Location: The Nederlands (Europe)

PostPosted: Wed Jul 24, 2013 6:51 pm    Post subject: Reply with quote

Very nice, the 2.0 NA turbo setup will live on

Any plans how to fix the clutch issue? (as it was one of the reasons you went for a 968 setup)
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Porsche 924 2.0 Kompressor 136.1wHp @ 5650rpm / 201.9wNm @ 3900rpm (dyno @ dp-engineering.nl)
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DutchPug  



Joined: 27 Jul 2008
Posts: 94
Location: the Netherlands

PostPosted: Sat Jul 27, 2013 4:47 am    Post subject: Reply with quote

Well, the slipping clutch was the instigator to swap to the 968 engine. Am still not 100% sure about the clutch. Spec has a ready to go item, but they say it can only hold 325nm... Know Helix has a clutch; still have to inform about the torque capacity.
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morghen  



Joined: 21 Jan 2005
Posts: 7838
Location: Romania

PostPosted: Sat Jul 27, 2013 4:53 am    Post subject: Reply with quote

nice, good luck with the new project !
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red 924 and not red 924
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ideola  



Joined: 01 Oct 2004
Posts: 15499
Location: Woodstock IL

PostPosted: Sat Jul 27, 2013 8:29 am    Post subject: Reply with quote

Why not do a switch to hydraulic clutch setup? I am doing that on my DProd tribute car, and it's really not so bad. You can use a cheap Ford Bronco II clutch disc, and get a 931 S1 pressure plate and flywheel setup. Then you can use a torque tube, shifter, and transmission from an early 944 or 924S, which will be just about perfect for turbo setup. You'll want new master and slave anyway, easy to plumb into the existing brake reservoir, only other thing you'll need is the clutch pedal connector.
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15 981 GTS | 88 924S SE | 82 931 Holbert | 82 931 Rallye | 81 937 | 81 Euro 931 | 81 Weissach | 80 US 928 | 80 US 931 '941' | 80 US 931 | 80 931 GTR | 79 Sebring | 78 D-Prod Replica | 78 w/D-Prod kit | 78 Poli-Form | 78 Limited Edition | 77 Martini
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DutchPug  



Joined: 27 Jul 2008
Posts: 94
Location: the Netherlands

PostPosted: Wed Jul 31, 2013 9:00 pm    Post subject: Reply with quote

Think going hydraulic is an idea... but also found a local company that modifies clutches for pulling contests; they say it is no problem to make something that can hold around 600nm... and cost are quite low. So recon i'll be trying that.

Here a work in progress pic;


Need to put in about 2 days of work to finish it, unfortunately not much time the next two weeks.
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DutchPug  



Joined: 27 Jul 2008
Posts: 94
Location: the Netherlands

PostPosted: Wed Aug 14, 2013 10:22 pm    Post subject: Reply with quote

Have the car running again, unfortunately at 0.7 bar the clutch already slips, could do one pull on the dyno; 175 whp, but with the timing still far from optimal.

Here some pics.

New exhaust system 3", you can just see the external wastegate in front of the first silencer.


Gas front and rear coilovers (no torsion bar delete). They actually drive pretty comfortable, was a bit suprised. Think a very good coilover set quality and prize considered. Biggest issue; as you can see no attachment for brake line .


Engine on the dyno



Engine pic2, still have to rearrange some stuff to make it a bit more tidy and make an oil catch
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Raceboy  



Joined: 01 Mar 2004
Posts: 2292
Location: Estonia, Europe

PostPosted: Wed Aug 14, 2013 10:33 pm    Post subject: Reply with quote

Too bad about the clutch, need to find a stronger one asap lol

Care to elaborate a bit more on the coil-overs? Who is the manufacturer, where to buy, what price?

Recipe for cheapest hp out of 924 is found I guess: healthy stock 924 engine, crossover pipe to left side, ditch CIS and convert to EFI and upgrade the clutch.
No hassle and 100+ additional hp guaranteed. Oil cooler recommended though when going to track though.
_________________
'83 924 2.5 16v Turbo, 470hp
'67 911 Irish Green hotrod, 2.4S
'89 944 S2
'91 944 S2
'78 924
'78 911 SC 2.5 ss Turbo "Martini"
'82 924S/931 "Gulf" racecar, 330 hp, sold
'84 924, turbocharged, sold.
http://www.facebook.com/vemsporsche
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fiat22turbo  



Joined: 18 Jan 2006
Posts: 4040
Location: Portland, OR

PostPosted: Thu Aug 15, 2013 12:47 am    Post subject: Reply with quote

You can secure the brake line with a couple of zipties.

Use a large/long one to loop loosly around the brake line and the strut.

Use the second, small one to pinch the loop between strut and brake line closed.

Finally tighten the larger ziptie to hold it all in place.

The second ziptie provides a spacer to keep the brake line from rubbing on the strut. Works great for hoses as and ignition wires when you don't have a loom.

Great progress thanks for sharing!
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Stefan
1979 924 Carrera GTS (clone-ish)
1988 944 Turbo S (Silver Rose)
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DutchPug  



Joined: 27 Jul 2008
Posts: 94
Location: the Netherlands

PostPosted: Thu Aug 15, 2013 6:45 pm    Post subject: Reply with quote

@ Raceboy

Here a link to the GAZ website; http://www.gazshocks.com/products. Have the GHA kit, believe the price for it is around 700 euro (including camber plates).

Indeed, the clutch needs to be upgraded asap

@ Fiat

Tnx for the tiewrap tip
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DutchPug  



Joined: 27 Jul 2008
Posts: 94
Location: the Netherlands

PostPosted: Mon Aug 26, 2013 7:42 pm    Post subject: Reply with quote

The clutch stock seemed to have regained some streigth after driving a bit... not sure why. So put it on the dyno again to see what could be done.

Managed to make 229whp and 266nm. The engine has a bit of pinking issues so when the new clutch is in will be going E85.

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Raceboy  



Joined: 01 Mar 2004
Posts: 2292
Location: Estonia, Europe

PostPosted: Mon Aug 26, 2013 9:18 pm    Post subject: Reply with quote

Very nice result! That is probably the most powerful boosted 924 NA engine, at least with regular gasoline.
Mine in the red 924 made a bit more but that was with 30% mix of Xylene to overcome detonation.

What boost did you run it at?
_________________
'83 924 2.5 16v Turbo, 470hp
'67 911 Irish Green hotrod, 2.4S
'89 944 S2
'91 944 S2
'78 924
'78 911 SC 2.5 ss Turbo "Martini"
'82 924S/931 "Gulf" racecar, 330 hp, sold
'84 924, turbocharged, sold.
http://www.facebook.com/vemsporsche
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DutchPug  



Joined: 27 Jul 2008
Posts: 94
Location: the Netherlands

PostPosted: Mon Aug 26, 2013 10:05 pm    Post subject: Reply with quote

Have ramped the boost to create a flat torque line (for obvious reasons). Boost starts at 0.7 bar and increases to 1.2. Had to take out quite a bit of timing, recon on E85 with 1.2 bar it will make around 245whp.

Want to make more rpms but have concerns about the lifters and rod bolds. Can not find much info from other people trying higher then 6500 rpm on these engines (in stock form).

How do the stock lifters and rod bolts keep up at 7000?
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Raceboy  



Joined: 01 Mar 2004
Posts: 2292
Location: Estonia, Europe

PostPosted: Mon Aug 26, 2013 10:12 pm    Post subject: Reply with quote

I have ran the 931 engine up to 7000rpm occasionally, so far no issues but with stock cam it has no point as VE drops quite quick after 6500.
_________________
'83 924 2.5 16v Turbo, 470hp
'67 911 Irish Green hotrod, 2.4S
'89 944 S2
'91 944 S2
'78 924
'78 911 SC 2.5 ss Turbo "Martini"
'82 924S/931 "Gulf" racecar, 330 hp, sold
'84 924, turbocharged, sold.
http://www.facebook.com/vemsporsche
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!tom  



Joined: 28 Aug 2006
Posts: 1869
Location: Victoria, BC Canada

PostPosted: Wed Aug 28, 2013 5:05 pm    Post subject: Reply with quote

DutchPug wrote:
How do the stock lifters and rod bolts keep up at 7000?

http://www.924board.org/viewtopic.php?t=26599
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