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bakerboy4s
Spa-Francorchamps


Joined: 06 Jun 2015
Posts: 267
Location: Staffordshire


PostPosted: Wed Jul 10, 2019 6:56 pm    Post subject: Reply with quote

Noticed on the job tag it reads 3.6-3.9, presume that's bore reqs and throw of crank shaft limits capacity to 3.7?
 
  
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Dammit
Indianapolis


Joined: 23 Sep 2016
Posts: 2386



PostPosted: Wed Jul 10, 2019 7:02 pm    Post subject: Reply with quote

With the stock engines the bore for the 3.4 and the 3.6 is 96mm (the 3.8 is 99mm IIRC).

On our engines we are running a 100mm bore.

The 3.4 crank has a stroke of 78mm and the 3.6 has a stroke of 82.8mm, with the 3.4 crank in the larger bore turning into a 3.7 (which is what I'm doing) and the 3.6 crank in the larger bore becoming a 3.9 (which Mister Corn is building).

(The 3.8 runs the 3.6/82.8mm stroke crank).
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MisterCorn
Dijon


Joined: 08 Jan 2011
Posts: 7306
Location: Nottingham, England

2004 Porsche 996 Turbo

PostPosted: Wed Jul 10, 2019 7:11 pm    Post subject: Reply with quote



That one in the photo was a 3.6l block. Here are the three blocks. Two 3.4 to 3.7l concersions and one 3.6 to 3.9l.

MC
 
  
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bakerboy4s
Spa-Francorchamps


Joined: 06 Jun 2015
Posts: 267
Location: Staffordshire


PostPosted: Wed Jul 10, 2019 7:19 pm    Post subject: Reply with quote

That's kind of what I thought, will it be necessary to mod the combustion chambers to suit the increase in bore size?
Or are the piston heads hollowed ?
 
  
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Dammit
Indianapolis


Joined: 23 Sep 2016
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PostPosted: Wed Jul 10, 2019 7:25 pm    Post subject: Reply with quote

The heads have been extensively reworked to suit.
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bakerboy4s
Spa-Francorchamps


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Location: Staffordshire


PostPosted: Wed Jul 10, 2019 7:28 pm    Post subject: Reply with quote

Great project look forward to how they perform and your satisfaction with it all.
Presume you guys have a back ground in engine design/ modding?
 
  
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Dammit
Indianapolis


Joined: 23 Sep 2016
Posts: 2386



PostPosted: Thu Jul 11, 2019 7:23 am    Post subject: Reply with quote

I’ve modified one car engine prior to this- but the dirty/easy way, starting with a turbocharged engine and then upgrading the various parts.

Although with that said we did port the head- but that was as “old-school proper engineering” as we got.

The Porsche engines are very much the purist route to response/revs/power- higher lift cams with longer duration, larger valves, extensive head work, larger displacement, increased compression etc etc.

As such the detail is beyond me- which is why we include a true expert with decades of experience designing and building race winning competition engines in our group of conspirators.
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Dammit
Indianapolis


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PostPosted: Thu Jul 11, 2019 7:30 am    Post subject: Reply with quote

Also, I have to say Baz of Hartech has been incredible- without his input and insight it would have been extremely difficult to have got to this point.

To be very clear- this is not a Hartech project, if all three engines explode on the Dyno it’s 100% down to us, but Baz, Grant and so on deserve huge credit for the help that they have given and if everything does go as planned it will be in large part due to them.
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Ghianightmare
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Joined: 25 Apr 2017
Posts: 356
Location: Dublin


PostPosted: Thu Jul 11, 2019 9:15 am    Post subject: Reply with quote

Fantastic - pure car porn!
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bakerboy4s
Spa-Francorchamps


Joined: 06 Jun 2015
Posts: 267
Location: Staffordshire


PostPosted: Thu Jul 11, 2019 8:45 pm    Post subject: Reply with quote

Dammit wrote:
Also, I have to say Baz of Hartech has been incredible- without his input and insight it would have been extremely difficult to have got to this point.

To be very clear- this is not a Hartech project, if all three engines explode on the Dyno it’s 100% down to us, but Baz, Grant and so on deserve huge credit for the help that they have given and if everything does go as planned it will be in large part due to them.


As you say fantastic of Baz et al to provide support and guidance and the benefit of his experience. Makes me think of my apprentice days!!
 
  
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Dammit
Indianapolis


Joined: 23 Sep 2016
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PostPosted: Wed Aug 07, 2019 8:38 pm    Post subject: Reply with quote

It's almost holiday time, which means it's roof-rack time.



Just:


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Alex
Le Mans
Le Mans


Joined: 06 Mar 2014
Posts: 17136
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Wed Aug 07, 2019 9:40 pm    Post subject: Reply with quote

Where to?
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Dammit
Indianapolis


Joined: 23 Sep 2016
Posts: 2386



PostPosted: Wed Aug 07, 2019 10:17 pm    Post subject: Reply with quote

Morzine via Rambouillet, and the D996.
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Dammit
Indianapolis


Joined: 23 Sep 2016
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PostPosted: Wed Aug 07, 2019 10:19 pm    Post subject: Reply with quote

I'm always deeply impressed whenever I get the roof rack out, the very chassis of the car was designed to accept the rack, and the rack itself is a beautiful piece of engineering. One of Porsche's engineers clearly wanted to be able to take something with them in their new car - who knows if it was a pair of skis, a canoe or a bike, but I thank them for their work.
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Griffter
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Joined: 22 May 2016
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PostPosted: Thu Aug 08, 2019 6:31 am    Post subject: Reply with quote

Can you put the roof down with the roof rack on?
I don’t know why but I think that would be so cool!
 
  
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Alex
Le Mans
Le Mans


Joined: 06 Mar 2014
Posts: 17136
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Thu Aug 08, 2019 6:33 am    Post subject: Reply with quote

Dammit wrote:
Morzine via Rambouillet, and the D996.


Nice. Enjoy!
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Dammit
Indianapolis


Joined: 23 Sep 2016
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PostPosted: Thu Aug 08, 2019 8:14 am    Post subject: Reply with quote

Griffter wrote:
Can you put the roof down with the roof rack on?
I don’t know why but I think that would be so cool!



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Slippydiff
Nürburgring


Joined: 22 Nov 2007
Posts: 406



PostPosted: Thu Aug 08, 2019 12:17 pm    Post subject: Reply with quote

Dammit wrote:
Morzine via Rambouillet, and the D996.


The D996. Oh my Neil, I'm deeply envious.
 
  
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Dammit
Indianapolis


Joined: 23 Sep 2016
Posts: 2386



PostPosted: Thu Aug 08, 2019 12:56 pm    Post subject: Reply with quote

This is my rough plan, so far - please those who know the roads chime in:


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Dammit
Indianapolis


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PostPosted: Thu Aug 08, 2019 6:42 pm    Post subject: Reply with quote





15mm thru-axle boost front wheel went into a QR wheel stand quite well, just used a standard 100mm QR and a toe-strap to hold the wheel as a belt'n'braces/just-in-case measure.
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