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Interesting head thought

 
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Bockscar  



Joined: 16 Nov 2010
Posts: 392
Location: Sandy, Oregon

PostPosted: Tue Jul 31, 2012 5:14 am    Post subject: Interesting head thought Reply with quote

Hello folks,

I was thinking about something this morning. The original 924 used VW's standard EA831 engine which was used in my VW's and Audi's of that era. Later on with the 931, Porsche continued to use the EA831 block but redesigned the head. Since they continued to use the standard block, the bolt pattern on the new head had to continue to match the block. Does this mean that one could take the head from late 80's 1.8T and bolt it onto the block? Head swaps are a very common modification with German cars for some reason, especially with BMWs.

Has anyone ever tried this?
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morghen  



Joined: 21 Jan 2005
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Location: Romania

PostPosted: Tue Jul 31, 2012 5:24 am    Post subject: Reply with quote

i have yet to see the vw/audi that uses the 924 block..
i've only seen one engine that looked alot liket a 924 engine and had the head cover different, it had a vw/audi emblem on it...it was on carbs..and on a 924...but i have no ideea what that is.

however, the MK2 vw has a different, smaller block. it is not the same as the block that the 924 uses.
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Bockscar  



Joined: 16 Nov 2010
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PostPosted: Tue Jul 31, 2012 5:27 am    Post subject: Reply with quote

morghen wrote:
i have yet to see the vw/audi that uses the 924 block..


The Audi 100 and VW LT Vans used this engine. It looks like most other VWs used the EA827 engine.
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morghen  



Joined: 21 Jan 2005
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PostPosted: Tue Jul 31, 2012 6:12 pm    Post subject: Reply with quote

Bockscar wrote:
morghen wrote:
i have yet to see the vw/audi that uses the 924 block..


The Audi 100 and VW LT Vans used this engine. It looks like most other VWs used the EA827 engine.


No they dont
i've seen loads of audi 100s and even LT vans, old as 77 and new as 86 and none of them had an engine that even looked similar to the 924 one.

like i said, i have yet to see a car that has the engine from a 924.

EDIT: i have never seen an LT that had anything else than a diesel engine.
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Rasta Monsta  



Joined: 12 Jul 2006
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PostPosted: Wed Aug 01, 2012 1:43 am    Post subject: Reply with quote

morghen wrote:
No they dont



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Kenodog  



Joined: 25 Jun 2003
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PostPosted: Wed Aug 01, 2012 1:59 am    Post subject: Reply with quote

Yes they do. The AMC Gremlin also uses our block although it has a different head and carbs. There was also a postal van in Canada and the US that has it. This is fact.
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Bockscar  



Joined: 16 Nov 2010
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PostPosted: Wed Aug 01, 2012 4:25 am    Post subject: Reply with quote

I did a bunch of research on this yesterday and here's what I discovered:

The engine in the stock 924 (EA831) is an old antiquated design originally made by NSU/Audi and very briefly used by Audi in their 100's from about 1975 to 1977. While some AMC cars use a variation of the EA831, AMC bought the rights to manufacturer the engine which is why you'll see AMC's with a similar looking engine with a different head and carbs.

Basically, our engine, the EA831, isn't a VW engine at all. It's an old NSU engine that VW inherited and didn't even use. VW chose to use their Audi designed EA827 engine which was first introduced in 1972 and still in use to this day.

The summarize, even though the two engines may look similar (the EA831 and EA827), they share very few things in common and the heads are certainly not compatible. Sad
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fiat22turbo  



Joined: 18 Jan 2006
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PostPosted: Wed Aug 01, 2012 5:05 am    Post subject: Reply with quote

Yep, the EA831 has more in common with the 5-cylinder Audi motors than the 4-cylinder VW motors.

That's why the Audi 5-cylinder swap isn't too bad to perform compared to say a Chebby V8 swap or even putting a 944 motor in the 924 shell.
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Raceboy  



Joined: 01 Mar 2004
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PostPosted: Wed Aug 01, 2012 5:17 am    Post subject: Reply with quote

There were Audi 100's from 1976-1978 which used the 924 engine block but used carbs and had 115 hp and LT vans also, these had 7.5:1 CR and produced 75 hp. About 10 years ago we bought several LT engines to get good usable blocks and crankshafts for real cheap (read: next to nothing).
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morghen  



Joined: 21 Jan 2005
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PostPosted: Wed Aug 01, 2012 5:45 pm    Post subject: Reply with quote

"i've looked into the internet" and it appears that the block was indeed used for LT vans and real old audis...however, i've never seen one in real life...even the old audis that i've seen had 5cyl diesel engines must have been a real production of these cars with these engines.

The bottom line is that we dont have a better head for the 924, this subject was discussed over and over again.
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McGyver  



Joined: 24 Feb 2009
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PostPosted: Thu Aug 16, 2012 5:06 am    Post subject: Reply with quote

An early VW LT 28/31/35 Vans has that 2.0L engine... it's quite hard to find as most of this vans have Diesel engine too... but here you can see one of this VW engines in LT28:

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RC  



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PostPosted: Thu Aug 16, 2012 5:19 am    Post subject: Reply with quote

OMG, see something new every day.
First time ever seeing one of those.

Thanks for the insight McGyver.
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McGyver  



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PostPosted: Sat Aug 18, 2012 2:54 am    Post subject: Reply with quote

And some more:





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Bockscar  



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PostPosted: Sat Aug 25, 2012 4:34 am    Post subject: Reply with quote

McGyver wrote:
An early VW LT 28/31/35 Vans has that 2.0L engine... it's quite hard to find as most of this vans have Diesel engine too... but here you can see one of this VW engines in LT28:


That's our little engine! It's almost a little embarrassing that the engine in our Porsche 924 is the same engine that is in a... VW LT Van..
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Mike9311  



Joined: 14 Dec 2004
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PostPosted: Mon Oct 03, 2016 8:50 am    Post subject: Reply with quote

I realize this is an old topic but I have something to contribute

I bought a AMC head yeeaaars ago off ebay that was essentially a 924NA

The cam and lifters are in the '82 Turbo right now. Spare matched set, not damaged, lets use them in an engine we were not sure of since previous owner flattened the lobes...

The AMC valve cover was steel and I wish I never buggered it up


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