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Porsche 964 - 200kg challenge

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Old 06-07-2020, 11:47 AM
  #121  
Jonte
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Originally Posted by RicardoD
I don't recall if your heads are stock or if they were ported for better breathing.
My heads are CNC ported to the 42.5mm and with 993 RS valves. I wanted to get the 9M heads when I built my engine but ran out of wallet...
Old 06-07-2020, 11:48 AM
  #122  
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Originally Posted by Sirenty
That was a great video. For some reason, I assumed GT3 intakes had to be used with ITBs.

Sign me up if you make extra lower intakes.

What ECU are you using?
I made some extra lower intakes ;-)

I’ll use the Motec M130 with dual lambdas.



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Old 06-07-2020, 11:56 AM
  #123  
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Originally Posted by Peteinjp
One issue to consider, as I just talked to Colin Belton at 9m a of it last night, is that the reason he hasn’t produced an aluminum intake stack is that the plastic is needed to insulate the injectors etc from the heat of the heads.

more diameter change throughout the runners rather than the relatively sudden transition happening just in the stack where you really want to keep the velocity high.

pete
These are all good points and I will have to defer to until I’ve tested it.

If you think about it though the intake runners have a lot of cool air running on the inside providing cooling and there are many intakes out there made out of metal. I would not be concerned about this and think the reason Porsche did them out of plastic is a few dollars for an injection mold compared to any metal options that all need machining.

the transition is today at about 1,5 degrees and I was working with the guideline to be below 3 to keep the flow laminar. One possibility would be to make em taller, and I’ll try this first ;-)
Old 06-07-2020, 11:58 AM
  #124  
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Originally Posted by 964.4L

Can’t wait to see the final weight of the assembled car. Do you have any idea / hope where it will come out?

I am thinking mine will be about 1,150kg’s once complete. But maybe a little lighter.
I’we weighed a lot of my friends car with my 4-point scales and based on what they’ve gotten to and the modifications they’ve made I’ll be bellow 1150 even with a full tank ;-)
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Old 06-07-2020, 12:00 PM
  #125  
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Originally Posted by EDoyle
Definitely one of the best videos yet and a must watch for anyone considering a gt3 intake. Jonte you must be an engineer?

I imagine you are keeping the intake ports in the head at stock dimensions VS enlarging to 993 RS spec (3mm more I believe)?
I can confirm that I’m a hopeless engineer by schooling (MSc in engineering physics). The valves are the 993 RS valves with 8mm stems.
Old 06-07-2020, 12:02 PM
  #126  
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Here we go, another one is out! Sorry for being late with the replies... I wasn’t getting any notifications from Rennlist for some reason...

It took a bit more time for this one as I “had” to spend a few weekends on the track driving...

Bling bling fuel tank - Tailor made 964 fuel cell
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Old 06-07-2020, 09:36 PM
  #127  
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Another excellent episode. I now have more ideas for what to do if I suddenly become incredibly wealthy.
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Old 06-11-2020, 09:29 AM
  #128  
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Originally Posted by Jonte
Next part is out and was a blast putting together. This is one of my long aspirations to build a DBW intake!

https://youtu.be/f5MiS8iLN1I

Interesting video.

I am doing essentially the same thing but my engine is twin turbocharged. GT3 plenum and throttle body DBW etc. A couple of things I noticed. There is more than enough room at the backside for the TB to stick out and fit a filter I cut two aluminum elbows and welded them, I can't use plastic since the pressures would be too great but I can fit the TB and have the pipe from the intercooler fit with ample room. I noticed is you based your intakes off the 964 units. Did you consider using the 993 RS designed units instead? They are a larger dia and raise the injector 4mm higher than the 964 units. This adds for better atomization of the fuel and better spray pattern onto the valves for cooling. It would have been a $20 per unit expense and is made from the same plastic which will handle the temps and not transfer the heat. My car weighs 2650 pounds with 1/2 tank of fuel. I'm not as concerned about weight since I will have more than enough power and contact patch to help me get around the track.

I like the CF intake very similar to the one Bob made for the America GS. What you really need is his fuel cell. Full CF with bladder and F1 technology fuel scavenge pickup points. This was specifically designed for the 964 America GS and if only we could get him to sell them.




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Old 06-11-2020, 11:13 AM
  #129  
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That is something else! Just dreaming- it would be great to have a single unit designed for the frunk and housed a fuel cell as well as an integrated oil tank. Would be nice to get that weight shifted up front.

Pete
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Old 06-11-2020, 03:30 PM
  #130  
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I guess not possible from a regs point of view, but the fuel tank is always a separate cell - would it not be feasible to integrate this actually into the front tub, ie, for it to be part of the structure itself rather than something that is bolted into it? I assume that as long as it's filled with the safety gel (or whatever it is) it would still be safe? You could probably move it further forward and lower maybe?

EDIT: Just noticed that this is my 3,600th post. Quite fitting today. RIP Hans.

Last edited by Andy Roe; 06-11-2020 at 03:54 PM.
Old 06-11-2020, 03:34 PM
  #131  
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Originally Posted by Peteinjp
That is something else! Just dreaming- it would be great to have a single unit designed for the frunk and housed a fuel cell as well as an integrated oil tank. Would be nice to get that weight shifted up front.

Pete
+1 Frunk oil cooler set ups just fascinate me. Move weight up front....

https://rennlist.com/forums/964-foru...te-design.html


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Old 07-04-2020, 04:20 PM
  #132  
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Here we go again, fenders, rear bumper, doors and hood. I think the task of the front fenders got the best of me this time...

Kevlar Dress Up - Fitting lightweight wide body kit
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Old 07-04-2020, 08:39 PM
  #133  
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Fitting bodywork panels is not easy nor cheap. It is very hard to appreciate how difficult and how many man hours are required to ensure custom panels fit well. Having just had the exterior of my car "adjusted", I can really sympathize with the volume of work you must be doing. Excellent build though and I continue to be amazed at your skill.
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Old 07-05-2020, 03:01 AM
  #134  
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Originally Posted by GentlemanRacer
Fitting bodywork panels is not easy nor cheap. It is very hard to appreciate how difficult and how many man hours are required to ensure custom panels fit well. Having just had the exterior of my car "adjusted", I can really sympathize with the volume of work you must be doing.
I could not agree more. It’s a ton of work and it just goes on an on. I’ll get there in the end though and the car is starting to look good!
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Old 07-05-2020, 11:40 AM
  #135  
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Hi - I am in love with you project!!! As I've said earlier... Keep the goods things coming please

I maybe have an idea for you - there is this german guy doing lightweight stuff for our 964's. Please have a look in his shop - Frank is a very nice guy and his parts are outstanding in quality fitment etc.

I have most if his stuff mounted and it is always a pleasure.

He has developed a pair of "mountings" (I don't know the word in english) for the aluminum beams in the front an the back - this will give you another 3,5 KG...

https://www.netzwerk-911-shop.de/sho...r-964-und-993/


Best regards, and I hope to see your car once its finished,

Greetz from Lübeck, Tim


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