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MisterCorn
Long Beach


Joined: 08 Jan 2011
Posts: 6359
Location: Nottingham, England

2004 Porsche 996 Turbo

PostPosted: Mon Nov 26, 2018 10:21 am    Post subject: Turbo gearbox parts finally arrived Reply with quote

I am having some upgrades done on my turbo at the moment, slippery slope and all that. These parts have just arrived for it:





It has basically taken me a year from first enquiry to them arriving, but apparently they are very good. I have changed the gearing to give slightly longer gearing in each gear for more relaxed motorway cruising, and a higher first so that it is more useful and the gap from first to second is more reasonable. These have been built as a straight cut gearset to handle extra torque. Also included is a 2 piece mainshaft, and a GT2 PRO LSD to get the power down when the car only has 2WD. I also have a billet cover plate for the gearbox and will be running an oil pump, spray bar, and cooler.

I am hoping that I have reached the bottom of the slope for the gearbox now 

Gears are:

gear Standard New
1st 3.82 3.17
2nd 2.05 2
3rd 1.41 1.38
4th 1.12 1.04
5th 0.92 0.84
6th 0.75 0.67

MC
 
  
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alex yates
Brands Hatch
Brands Hatch


Joined: 06 Mar 2014
Posts: 14468
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Mon Nov 26, 2018 10:49 am    Post subject: Reply with quote

Will be interesting to hear the noise difference with straight cut gears.
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2000 Manual 996 C4 Arctic Silver Convertible


 
  
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MisterCorn
Long Beach


Joined: 08 Jan 2011
Posts: 6359
Location: Nottingham, England

2004 Porsche 996 Turbo

PostPosted: Mon Nov 26, 2018 10:56 am    Post subject: Reply with quote

alex yates wrote:
Will be interesting to hear the noise difference with straight cut gears.


I have been told that they aren't all that loud. I wouldn't have done it through choice, but apparently if I want to keep the gears on the shaft with the torque it will produce I have no option.
With a bit of luck you won't hear it over the exhaust Very Happy

MC
 
  
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alex yates
Brands Hatch
Brands Hatch


Joined: 06 Mar 2014
Posts: 14468
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Mon Nov 26, 2018 11:16 am    Post subject: Reply with quote

Grin Thumb

You can always add a couple of sweaty socks in there, or some saw dust. Surprised
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2000 Manual 996 C4 Arctic Silver Convertible


 
  
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sim996
Silverstone


Joined: 05 Aug 2017
Posts: 108



PostPosted: Mon Nov 26, 2018 11:25 pm    Post subject: Reply with quote

Is fearnsport building your box? I've been discussing gearboxes with Matt for mine, he was talking about the guards stuff and it being the way to go.
 
  
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HSC911
Zolder


Joined: 23 Jul 2014
Posts: 5717
Location: Bedford


PostPosted: Tue Nov 27, 2018 1:29 am    Post subject: Reply with quote

Surprised

Pop Corn
 
  
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MisterCorn
Long Beach


Joined: 08 Jan 2011
Posts: 6359
Location: Nottingham, England

2004 Porsche 996 Turbo

PostPosted: Tue Nov 27, 2018 5:29 am    Post subject: Reply with quote

sim996 wrote:
Is fearnsport building your box? I've been discussing gearboxes with Matt for mine, he was talking about the guards stuff and it being the way to go.


Yes he is. He is doing the entire engine build as well.

MC
 
  
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sim996
Silverstone


Joined: 05 Aug 2017
Posts: 108



PostPosted: Tue Nov 27, 2018 6:04 am    Post subject: Reply with quote

MisterCorn wrote:
sim996 wrote:
Is fearnsport building your box? I've been discussing gearboxes with Matt for mine, he was talking about the guards stuff and it being the way to go.


Yes he is. He is doing the entire engine build as well.

MC


Good choice, not only a talent, but a true gentleman. All my stuff is down there.
 
  
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sim996
Silverstone


Joined: 05 Aug 2017
Posts: 108



PostPosted: Wed Nov 28, 2018 9:54 am    Post subject: Re: Turbo gearbox parts finally arrived Reply with quote

MisterCorn wrote:
I am having some upgrades done on my turbo at the moment, slippery slope and all that. These parts have just arrived for it:





It has basically taken me a year from first enquiry to them arriving, but apparently they are very good. I have changed the gearing to give slightly longer gearing in each gear for more relaxed motorway cruising, and a higher first so that it is more useful and the gap from first to second is more reasonable. These have been built as a straight cut gearset to handle extra torque. Also included is a 2 piece mainshaft, and a GT2 PRO LSD to get the power down when the car only has 2WD. I also have a billet cover plate for the gearbox and will be running an oil pump, spray bar, and cooler.

I am hoping that I have reached the bottom of the slope for the gearbox now 

Gears are:

gear Standard New
1st 3.82 3.17
2nd 2.05 2
3rd 1.41 1.38
4th 1.12 1.04
5th 0.92 0.84
6th 0.75 0.67

MC


Can I ask what FD you are using with those ratios?
 
  
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MisterCorn
Long Beach


Joined: 08 Jan 2011
Posts: 6359
Location: Nottingham, England

2004 Porsche 996 Turbo

PostPosted: Wed Nov 28, 2018 10:17 am    Post subject: Reply with quote

Running the standard final drive. The idea being that if you have free reign over the main 6 ratios you don't need to touch the FD.
The Turbo has the opposite problem to my C4. It has so much torque and power that the gears all seem too short and it ends up doing 3k+ rpm at motorway cruising speeds. The C4 is geared for close to 200mph but for what I want would be better if geared for 130mph. Unfortunately different ratios are not so easily available for the C4.

MC
 
  
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996ttalot
Approved Trader


Joined: 21 Sep 2009
Posts: 1424
Location: Horley Gatwick


PostPosted: Fri Nov 30, 2018 9:16 am    Post subject: Reply with quote

gt2rs mainshaft ?
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Tel: 01293 226911. Follow us on Facebook www.facebook.com/Nineexcellence
SALES, SERVICE, UPGRADES
 
  
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MisterCorn
Long Beach


Joined: 08 Jan 2011
Posts: 6359
Location: Nottingham, England

2004 Porsche 996 Turbo

PostPosted: Fri Nov 30, 2018 12:54 pm    Post subject: Reply with quote

996ttalot wrote:
gt2rs mainshaft ?


Yes

MC
 
  
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996ttalot
Approved Trader


Joined: 21 Sep 2009
Posts: 1424
Location: Horley Gatwick


PostPosted: Fri Nov 30, 2018 1:27 pm    Post subject: Reply with quote

MisterCorn wrote:
996ttalot wrote:
gt2rs mainshaft ?


Yes

MC
That's good to hear. When we first starting doing these boxes years ago we had major problems with different shafts available so it is the only one that we know for sure works.
_________________
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Tel: 01293 226911. Follow us on Facebook www.facebook.com/Nineexcellence
SALES, SERVICE, UPGRADES
 
  
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sim996
Silverstone


Joined: 05 Aug 2017
Posts: 108



PostPosted: Fri Nov 30, 2018 7:11 pm    Post subject: Reply with quote

996ttalot wrote:
MisterCorn wrote:
996ttalot wrote:
gt2rs mainshaft ?


Yes

MC
That's good to hear. When we first starting doing these boxes years ago we had major problems with different shafts available so it is the only one that we know for sure works.


Ken, do you have any clips of a straight cut G96/G97 box from inside the cabin? I know how my Westfield sounds and it isn't nice, but then it's right next to me seperated by a carbon panel. Might be bearable in a Porsche..
 
  
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