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Old 28-01-2019, 08:05 AM   #1
Mistercorn
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Default Porsche 996 fast road / track car

Just a quick intro to the project I'm currently working on before I get started on my mini project. The car was originally a 2001 996 Carrera 4 on 195k miles. My plan is to modify it for use as a fast road / track car. Main things to do....


Remove 4wd system
Fit lightweight battery
Fit better suspension
Fit better brakes
Strip and retrim interior
Fit lighter seats, cage, harness
Add switchable centre radiator to aid cooling
Remove roof panel and fit non-sunroof version
Clean up underside and underseal


Later work will involve serious mods to the engine and gearbox, including a custom tappet chest to enable higher RPM with different lifter and custom camshafts. Here are a few photos of what I've been up to so far














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Old 28-01-2019, 08:06 AM   #2
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Old 28-01-2019, 08:10 AM   #3
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Old 28-01-2019, 08:14 AM   #4
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The car is now nearly ready to go off to the bodyshop to have a bit of welding done, get the roof changed, and have a respray with new fibreglass doors and bonnet fitted.

I have made a start on the engine mods but they will be finished at a later date, here is one of the machining test pieces for the tappet chest. The first prototype is now ready to run in an engine.



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Old 29-01-2019, 11:47 AM   #5
Dopeshow
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Interesting project. I look forward to further updates..
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Old 29-01-2019, 12:11 PM   #6
Phaeton
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Why remove the 4WD?
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Old 29-01-2019, 02:10 PM   #7
Mistercorn
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Quote:
Originally Posted by Phaeton View Post
Why remove the 4WD?
I wanted the car to be as strong as possible, the 4WD chassis is stiffer than the 2wd chassis which is why it was used for the GT3 cars. This chassis was not used for any other 2wd versions. The 4wd suspension design is somewhat compromised at the front end due to the shock absorbers having to be mounted at an angle to clear the front driveshafts, so as part of the conversion I have fitted 2wd front uprights.

Removing the 4wd system obviously removes a good chunk of weight as well, but the main reason is for the improved chassis stiffness. The 4wd variants are not as well sought after and when they parts are stripped off they can be sold on. The system is entirely passive with a viscous coupling in the front diff housing. So there is nothing else to change which it is removed, the only difference to the 2wd is that there is an unused power take-off from the front end of the gearbox.

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