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Porsche 924 Racecar Build Thread (AAN Conversion)
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jacobroufa  



Joined: 18 Nov 2016
Posts: 260
Location: Rockford, IL

PostPosted: Mon Jun 24, 2019 12:39 pm    Post subject: Reply with quote

Dang this is inspiring! Thanks for sharing!
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1980 Porsche 931
1981 Porsche 924 Weissach
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Stophosjr  



Joined: 02 Jul 2014
Posts: 6
Location: New Jersey

PostPosted: Mon Jun 24, 2019 12:52 pm    Post subject: Reply with quote

Holy shit. I want it. No joke, if you ever want to move on, contact me.
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Qik Nip  



Joined: 16 Jan 2015
Posts: 130
Location: Kentucky

PostPosted: Tue Jun 25, 2019 5:46 am    Post subject: Reply with quote

I am duly impressed. And I thought I'd created the world's costliest 924!
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'79 NA 924 Land Speed Car
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MikeJinCO  



Joined: 08 Jun 2010
Posts: 899
Location: Maysville, Colorado

PostPosted: Tue Jun 25, 2019 12:36 pm    Post subject: Reply with quote

Absolutely amazing. Your parts fabrication and engineering are top notch and you have many unique and cost saving solutions. I really liked your approach for the strut tower brace, simple and cheap. Also your lower caster block brace is quite unique and an often overlooked but quite necessary part. I do wonder why you went with AAN over using the VW 1.8T.
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Mike
Poco a Poco, #033 '78 Vintage racer, SCCA Dp-81
'77 924
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Carrera RSR  



Joined: 08 Jan 2010
Posts: 1970
Location: Somerset, UK

PostPosted: Tue Jun 25, 2019 5:02 pm    Post subject: Reply with quote

MikeJinCO wrote:
I do wonder why you went with AAN over using the VW 1.8T.


The 5 pot sound? Potential 400hp?
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
Now www.924board.org/viewtopic.php?t=34690
Then www.924board.org/viewtopic.php?t=31252
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morghen  



Joined: 21 Jan 2005
Posts: 8164
Location: Romania

PostPosted: Tue Jun 25, 2019 5:17 pm    Post subject: Reply with quote

5 pot sound is the best.
I have a 5 cyl diesel and even that one sounds great.
Wish the 924 came with a 5cyl from the start.
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MikeJinCO  



Joined: 08 Jun 2010
Posts: 899
Location: Maysville, Colorado

PostPosted: Wed Jun 26, 2019 2:55 am    Post subject: Reply with quote

I was not running down the I5, I had one of the early Audi Coupe Gt's(wish I still had it). I was best driving car I ever had. I didn't realize the equipment available for that motor until I looked up 034 motorsports. I wish we had parts like that available. Also a reasonably reliable 400hp in that car would be amazing.
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Poco a Poco, #033 '78 Vintage racer, SCCA Dp-81
'77 924
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Britain  



Joined: 26 Nov 2013
Posts: 176
Location: Hillsboro, OR

PostPosted: Thu Jun 27, 2019 2:35 am    Post subject: Reply with quote

MikeJinCO wrote:
Absolutely amazing. Your parts fabrication and engineering are top notch and you have many unique and cost saving solutions. I really liked your approach for the strut tower brace, simple and cheap. Also your lower caster block brace is quite unique and an often overlooked but quite necessary part. I do wonder why you went with AAN over using the VW 1.8T.


There were a couple of motivations to go with the 5-cyl.

1. The AAN engine bolted up to the 931 bellhousing and didn't require any adapter plates or anything to make it work.

2. We wanted to go with a slightly bigger displacement of the 2.2L 5-cyl so it wouldn't be as stressed as a high-strung 2.0L 4-cyl.

3. The 5-cyl is freaking cool and looks like it is supposed to go there.

-Britain
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CÚdric  



Joined: 27 Aug 2004
Posts: 1973
Location: Sweden

PostPosted: Thu Jun 27, 2019 3:45 am    Post subject: Reply with quote

morghen wrote:
5 pot sound is the best.
I have a 5 cyl diesel and even that one sounds great.
Wish the 924 came with a 5cyl from the start.


Naaa, the in-line fives back then were heavy boat anchors. We had an early audi 80, the engine were gutless and heavy, i rather have the 2.0
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Britain  



Joined: 26 Nov 2013
Posts: 176
Location: Hillsboro, OR

PostPosted: Thu Jun 27, 2019 3:53 am    Post subject: Reply with quote

CÚdric wrote:
morghen wrote:
5 pot sound is the best.
I have a 5 cyl diesel and even that one sounds great.
Wish the 924 came with a 5cyl from the start.


Naaa, the in-line fives back then were heavy boat anchors. We had an early audi 80, the engine were gutless and heavy, i rather have the 2.0


Ah...the AAN is 2.2L, 4valves/cylinder, awesomeness.
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CÚdric  



Joined: 27 Aug 2004
Posts: 1973
Location: Sweden

PostPosted: Thu Jun 27, 2019 4:51 am    Post subject: Reply with quote

Britain wrote:
CÚdric wrote:
morghen wrote:
5 pot sound is the best.
I have a 5 cyl diesel and even that one sounds great.
Wish the 924 came with a 5cyl from the start.


Naaa, the in-line fives back then were heavy boat anchors. We had an early audi 80, the engine were gutless and heavy, i rather have the 2.0


Ah...the AAN is 2.2L, 4valves/cylinder, awesomeness.


Aan is a different animal, Mid 70s in-line fives were less awesome i can assure you fives sound cool and are fairly compact, though the gas exchange is a mess they can work really well. Definitely a much better use of the engine than having in sitting in a front heavy audi

A couple of years ago they were super common, especially as drag cars over here in audi s2s etc.
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Britain  



Joined: 26 Nov 2013
Posts: 176
Location: Hillsboro, OR

PostPosted: Tue Jul 09, 2019 4:22 am    Post subject: Reply with quote

Well...if you do this long enough eventually you are going to wreck your car.

We had an incident at the race this past weekend that resulted in contact with the wall down the front straight of PIR at abut 60mph. The data showed that the car hit the wall at about a 120deg angle with -1G of LongAcc and -2.5G of LatAcc. Not the hardest hit in the world, but enough the tear up the front end of the car.





Started tearing it apart last night and I think that their is minimal frame damage and it can be repaired. My plan is to get the suspension damage repaired to get the car rolling and then take it to the alignment shop to measure the chassis to make sure it is ok before repairing everything up front.



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Carrera RSR  



Joined: 08 Jan 2010
Posts: 1970
Location: Somerset, UK

PostPosted: Tue Jul 09, 2019 5:49 am    Post subject: Reply with quote

That absolutely sucks having just repaired the rear and a fresh motor install!!
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
Now www.924board.org/viewtopic.php?t=34690
Then www.924board.org/viewtopic.php?t=31252
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morghen  



Joined: 21 Jan 2005
Posts: 8164
Location: Romania

PostPosted: Tue Jul 09, 2019 6:23 am    Post subject: Reply with quote

Sorry to see this.
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KDJones2000  



Joined: 14 Sep 2010
Posts: 319
Location: Phoenix, AZ

PostPosted: Tue Jul 09, 2019 8:21 am    Post subject: Reply with quote

Here's hoping that it is repairable...
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