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sim996
Silverstone


Joined: 05 Aug 2017
Posts: 128



PostPosted: Thu Apr 12, 2018 8:57 pm    Post subject: Reply with quote

FRP wrote:
So it for a 996 big HP build, ahhhhhh this i know well !!!

You dont need a GT2 box end of

Bill Raider build, GT2 slave the usual stronger bits and chose your ratios

You will need to disconnect your front diff
Depending on boost levels and agression, you will need to change drive shafts
And some other bits


So what are the usual stronger bits?

Would it be per chance a 997 GT2 input shaft and 1-3 gears, LSD and spray bar...

I believe it's RADER for the bloke over the pond
 
  
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Stuart Mackay
Spa-Francorchamps


Joined: 29 Apr 2013
Posts: 262
Location: Swaffham, Norfolk and Good


PostPosted: Thu Apr 12, 2018 11:49 pm    Post subject: Reply with quote

Have you spoken to Matt at Fearnsport or the lads at ES Motor, they would be my first ports of call for someone who might know of such a piece of hardware lying under a bench?
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FRP
Barcelona


Joined: 30 Apr 2014
Posts: 1455
Location: Middlesex


PostPosted: Fri Apr 13, 2018 4:23 am    Post subject: Reply with quote

Speak to Ken or Adam at 9e

I have a gearbox from them for my car. 1000 bhp etc. No complaints what so ever .... it runs perfect and 100% drivability

Yes over the pond!

Yes stronger shafts. Straight cut gears for 3 4 5 etc (no 100% hard launches as you will break stuff.....you don’t need t with this kind nd of power level). Custom clutch. Guards LSD etc. But as for the finer details you will have to call them — 9e

For 1000 bhp you will need the LSD end of.
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2002 996tt x50 manual in bassat black - 9eXX
 
  
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sim996
Silverstone


Joined: 05 Aug 2017
Posts: 128



PostPosted: Fri Apr 13, 2018 5:58 am    Post subject: Reply with quote

I'm not keen on straight cut, I've got straight cut in my Westfield and I don't mind the noise in that because of what it is. The Porsche is a road car.
 
  
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FRP
Barcelona


Joined: 30 Apr 2014
Posts: 1455
Location: Middlesex


PostPosted: Fri Apr 13, 2018 6:18 am    Post subject: Reply with quote

1000 bhp and the way it will lay down or the determined boost levels on the way the power is delivered may determine the gearbox requirements implemented ?

It depends on your route, but there aint no cheap method - ask me how i know LOL !

I have straight cut in 3, 4 and 5th gears with associated boost by RPM, after all i want to keep traction at its optimal level....well i try to LOL

BTW - I love the noise - each to their own! a real sense of occasion and that is what i want from my car along with its other mods. Its (the whine) not that bad with all the interior insulation TBH. I dont have any other toys except my wifes 0.9l Renault Clio, oh but its so easy to drive?
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MisterCorn
Long Beach


Joined: 08 Jan 2011
Posts: 6491
Location: Nottingham, England

2004 Porsche 996 Turbo

PostPosted: Fri Apr 13, 2018 6:19 am    Post subject: Reply with quote

If you don't want straight cut then I suggest you set up the car to keep the torque down. From my research if you are going to put a lot of torque through the 'box you will need straight cut gears to reduce the side loads. Guard appear to be pretty much the only game in town when it comes to great gear sets.
There are a few specialists who will be able to advise on this, most have been mentioned in this thread. I wouldn't risk not going straight cut myself. I would hate to spend many thousands on the work, go against the recommendations of the engine builder, then have a gearbox failure. It is simply not worth the risk. Stick to 700hp or below and the standard gearbox should be fine.

MC
 
  
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FRP
Barcelona


Joined: 30 Apr 2014
Posts: 1455
Location: Middlesex


PostPosted: Fri Apr 13, 2018 6:33 am    Post subject: Reply with quote

Wise words from MC

Std healthy gearbox will run circa 700bhp all day long
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sim996
Silverstone


Joined: 05 Aug 2017
Posts: 128



PostPosted: Fri Apr 13, 2018 4:30 pm    Post subject: Reply with quote

I've got the syvecs, so I can limit torque no problem, was looking at around 800ft/lbs and let it run out, probably see 900+ hp, turbos are new A3076.

Engine is 4.0, so will have plenty of torque.

Looking at options, if I have to go straight cut I might, but I don't think the 997 GT2 is straight cut, and I'm told that will handle my power level.

Yes, I think the guards is a must, but I'm thinking ATB instead of clutch packs, as I want this to be a nice drive as opposed to all out power. It won't be tracked, but if I put my foot in I don't want to worry, so I want that reliability, hence building in a bit of headroom.
 
  
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ragpicker
Estoril


Joined: 14 Apr 2013
Posts: 3797
Location: North East England


PostPosted: Fri Apr 13, 2018 5:26 pm    Post subject: Reply with quote

Sounds like a great build!

What's the lag like on those blowers, and what kind of boost are you looking to run?

Thumb
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sim996
Silverstone


Joined: 05 Aug 2017
Posts: 128



PostPosted: Fri Apr 13, 2018 5:37 pm    Post subject: Reply with quote

ragpicker wrote:
Sounds like a great build!

What's the lag like on those blowers, and what kind of boost are you looking to run?

Thumb


On a 4.0 they should be pretty well matched, I dont want lag for a road car, they must be driveable from low down. I like usable torque. They're the xona wheel ones so hopefully plenty of spool.

Not sure on boost, will see when we map.
 
  
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FRP
Barcelona


Joined: 30 Apr 2014
Posts: 1455
Location: Middlesex


PostPosted: Fri Apr 13, 2018 6:27 pm    Post subject: Reply with quote

SOUNDS COOL, keep the info coming, sounds mega

Mine is only a 3.8 tho and running custom Tial Sport Xona 1180 Turbochargers

Standard at approx 1.2/1.3 boost. Can run 1.5 boost all day long and crank it up to 1.8+ when needed but is very hairy on boost at the higher end. Car is boosted to RPM to ensure traction loss is as minimal as possible and have various maps on the controller

Lag is there dont get me wrong, just gotta keep it in the correct rev range and you are ready to go,,,,,literly !

Do live / real mapping, absolulty no point in getting it on a rolling road IMHO....just saying

Where are you based ?
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Last edited by FRP on Fri Apr 13, 2018 6:51 pm; edited 1 time in total
 
  
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HSC911
Zolder


Joined: 23 Jul 2014
Posts: 5957
Location: Bedford


PostPosted: Fri Apr 13, 2018 6:37 pm    Post subject: Reply with quote

FRP wrote:
SOUNDS COOL, keep the info coming, sounds mega


Yeah

worship
 
  
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Norfolk & Idea
Barcelona


Joined: 15 Jan 2016
Posts: 1390
Location: South Yorkshire


PostPosted: Sat Apr 14, 2018 7:15 am    Post subject: Reply with quote

FRP wrote:
Wise words from MC

Std healthy gearbox will run circa 700bhp all day long


Yeah, wise words indeed. Certainly makes sense to me. What are the bhp upper limits with a PDK?
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2008 Ducati 1098R (Track)
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isysman
Zolder


Joined: 22 Apr 2011
Posts: 5774
Location: Cheshire


PostPosted: Sat Apr 14, 2018 11:45 am    Post subject: Reply with quote

sim996 wrote:
8 replies, not 1 gearbox offered. Blimmin Eck.


I think I have one in my others trousers...
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Jay Are
Trainee


Joined: 04 Jul 2015
Posts: 84
Location: Kesselchen


PostPosted: Mon Apr 16, 2018 9:06 pm    Post subject: Reply with quote

Not sure what it is (996/997) but there was definitely a GT2 Box in Liverpool for ages. Tech 9 perhaps...

came out of a race car so God knows what state it was in. I looked at it but decided £15k was a bit rich for my needs especially as it was of unknown quality - that said, they were offering to strip / rebuild as proof of useability as I recall... worth asking.

They may still have it. I have a feeling it's a 996 box but there won't be much difference - will there?? Question
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116618LN
Trainee


Joined: 30 Apr 2017
Posts: 80
Location: London/Dubai


PostPosted: Mon Apr 16, 2018 9:53 pm    Post subject: Reply with quote

Someones selling a box on 6speed with a load of goodies. Might be what you're looking for...

https://www.6speedonline.com/forums/automotive-parts-accessories-sale-wanted/416722-fs-996tt-gt2-gearbox-w-cooler-guard-gt2-pro-lsd.html
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sim996
Silverstone


Joined: 05 Aug 2017
Posts: 128



PostPosted: Wed Apr 18, 2018 11:28 am    Post subject: Reply with quote

116618LN wrote:
Someones selling a box on 6speed with a load of goodies. Might be what you're looking for...

https://www.6speedonline.com/forums/automotive-parts-accessories-sale-wanted/416722-fs-996tt-gt2-gearbox-w-cooler-guard-gt2-pro-lsd.html


Aye, I've spoke to him. Trying to get some prices on a 997 GT2 input shaft and gears, that's the difference over the 996 GT2 box, it's much stronger in the 997 and a proven upgrade.

My other issue is, do far almost everything I have ever bought from the yanks has turned out to be garbage.
 
  
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sim996
Silverstone


Joined: 05 Aug 2017
Posts: 128



PostPosted: Wed Apr 18, 2018 11:28 am    Post subject: Reply with quote

116618LN wrote:
Someones selling a box on 6speed with a load of goodies. Might be what you're looking for...

https://www.6speedonline.com/forums/automotive-parts-accessories-sale-wanted/416722-fs-996tt-gt2-gearbox-w-cooler-guard-gt2-pro-lsd.html


Aye, I've spoke to him. Trying to get some prices on a 997 GT2 input shaft and gears, that's the difference over the 996 GT2 box, it's much stronger in the 997 and a proven upgrade.

My other issue is, it's in America.
 
  
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sim996
Silverstone


Joined: 05 Aug 2017
Posts: 128



PostPosted: Thu Apr 19, 2018 5:42 am    Post subject: Reply with quote

Jay Are wrote:
Not sure what it is (996/997) but there was definitely a GT2 Box in Liverpool for ages. Tech 9 perhaps...

came out of a race car so God knows what state it was in. I looked at it but decided £15k was a bit rich for my needs especially as it was of unknown quality - that said, they were offering to strip / rebuild as proof of useability as I recall... worth asking.

They may still have it. I have a feeling it's a 996 box but there won't be much difference - will there?? Question


Thanks for the lead. I just emailed him and they had one but sold it.
 
  
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FRP
Barcelona


Joined: 30 Apr 2014
Posts: 1455
Location: Middlesex


PostPosted: Thu Apr 19, 2018 6:09 am    Post subject: Reply with quote

BUILDING YOUR OWN GEARBOX (I did not tho as way beyone me) if its any help, this is a good list of what you might require or at least the modified bits, its a starter for 10 anyways

big shaft nut - input
big shaft nut - pinion
small shaft nut - input
small shaft nut - pinion
Guards billet LSD if a manual gearbox
CMS billet diff side cover
CMS billet bearing clamping plate
GT3 shift leaver
1st gear syncro set
2nd gear syncro set racing steel version
steel syncros 3rd thru 6th
CMS 3/4 shift set
GT2RS main shaft 1st and 2nd gear
Decide on straight cut gears 3rd, 4th 5th and 6th ???
modified oil pick up and return fittings plus misc other small items
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