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 Post subject: Re: The Holy Grail: Limited Slip Differential
PostPosted: Wed May 29, 2013 8:57 pm 
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George924S wrote:
Been looking for a LSD ( option M220) 40% for the 924S but no luck yet :???:


Look for a 944 turbo S gearbox. Limited numbers, high prices. Only worth it if you track and/or have over 200bhp.

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Steve
1980 924 Turbo Series 1 - Alpine White & Guards Red
Omega forged pistons, lightened and balanced bottom end, ARP studs + Cometic MLS HG, Piper fast road cam, K27/26 3257 hybrid turbo, 951 ducted FMIC, Custom intake manifold, Mittelmotor dizzy & cam pulley, Adj boost - dyno’d at 225bhp @ 1.0bar on previous CGT turbo, Engine datalogged and on boost fuel enrichment managed with Zeitronix ZT2 & Phormula KS4 knock sensor, 944 turbo all alloy radiator, Hayward & Scott custom tapered race exhaust, GAZ Gold coilovers, Fuch'ed up, Quaife LSD
2017 VW Passat Variant GTE Advance - the daily load lugger and mile muncher
2015 Nissan Leaf Tekna - it builds trees when we drive it


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 Post subject: Re: The Holy Grail: Limited Slip Differential
PostPosted: Thu May 30, 2013 2:57 pm 
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Joined: Thu Dec 13, 2012 1:29 pm
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Location: Athens , Greece
Model: 1988 924S
Carrera RSR wrote:
George924S wrote:
Been looking for a LSD ( option M220) 40% for the 924S but no luck yet :???:


Look for a 944 turbo S gearbox. Limited numbers, high prices. Only worth it if you track and/or have over 200bhp.


A 40% LSD is also available though in cars with less bhp is it not? i have to say i lack a lot of knowledge on the subject to say the least :oops: :oops: :oops: :oops: Not that i consider critical to find and install one but i am trying to imagine what it would be like with one on... i drove a 996 anniversary edition 40jahre and it had a LSD on, couldnt tell any difference between this car and my 996 which hasnt got one.... guess its good when pushing a car to its limits...???

I wonder if the variable M differentail lock that my E46 M3 had is the same think .... :oops: :oops: :oops: :?: :?: :?:


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 Post subject: Re: The Holy Grail: Limited Slip Differential
PostPosted: Sun Jan 31, 2016 9:27 pm 
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Joined: Fri Nov 22, 2013 1:23 pm
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Location: Atherstone
Model: 924 na
Reviving an old thread I know, but can anybody tell me of any options for an LSD to fit the 924n/a

is the box different to the S?

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Chris Valentine (rallyimp)
1981 924rallye NA white - https://porsche924.co.uk/forum/viewtopi ... 24&t=21236 - https://porsche924.co.uk/forum/viewtopi ... =7&t=20065
1966 Hillman Imp Rally Replica https://porsche924.co.uk/forum/viewtopi ... 10&t=28521
My website https://sites.google.com/site/valeracin ... orsche-924


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 Post subject: Re: The Holy Grail: Limited Slip Differential
PostPosted: Sun Jan 31, 2016 10:13 pm 
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It is different slightly but importantly for swapping as an S/944 box has the larger input shaft (?21mm) compared to the NA (?19mm).

But all the 944 boxes are the same (?21mm). If you want to swap in a 944 torque tube to fit a 924s/ 944 g'box you need to also swap to the hydraulic clutch and bell housing from a 924 turbo as the 924 2.0 clutch plate won't fit a 944 torque tube. To fit the hydraulic clutch you need to modify the bulkhead and get the pedal from a turbo/S or 944 etc.

All 944 boxes are the same drive ratio except the 944S2 and 951 boxes. The 951 and 951S boxes have various stronger bits which are beefier in 1st and second and shot peened etc. and also stronger diff casing etc. Some have oil cooler pumps I them and LSD's too. If it has an LSD it should have a cooler, but a cooler doesn't guarantee a LSD. IIRC.

I have 3 951 boxes. 2 without LSD and one with LSD (and cooler). There are a much higher drive ratio, so 70mph is something like 2600rpm - it suits my engine great as it's a nice GT cruiser - feels like a diesel!!

The stock 924 box was way too short in 1st with 230bhp and I was snatching 2nd almost before the clutch was fully out!! It felt quicker with the butt dyno though as it was all a bit more frantic!!

:beer:

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924T engine with Eaton M90 Supercharger (DB7), 565cc injectors, coil pack ignition, Adaptronic ECU, Custom Air/water charge cooler, Wideband O2 + 4x EGT. 4pot Brembos, Spax adjustable dampers. 951 G'box with LSD & cooler, 944T style bumper. HID Lo-Pro headlights. 968 mirrors, handles + spoiler. Zender rear valance. Custom side skirts, Forged 17" wheels (8J front, 9J rear). Custom hubs (5x114.3 PCD), Twin circuit coolant re-route (2 pumps, 2 'stats, 2 radiators), 6 gauge centre console.


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 Post subject: Re: The Holy Grail: Limited Slip Differential
PostPosted: Sun Jan 31, 2016 10:16 pm 
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Location: Somerset
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Only in 924 turbo or 944 turbo boxes as an option. Mounting for the turbo box is different as are the splines on the TT. A 44 box may fit, think Dr John has a 44 box. Any issues with your rallying events?

Edit John beat me to it

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Steve
1980 924 Turbo Series 1 - Alpine White & Guards Red
Omega forged pistons, lightened and balanced bottom end, ARP studs + Cometic MLS HG, Piper fast road cam, K27/26 3257 hybrid turbo, 951 ducted FMIC, Custom intake manifold, Mittelmotor dizzy & cam pulley, Adj boost - dyno’d at 225bhp @ 1.0bar on previous CGT turbo, Engine datalogged and on boost fuel enrichment managed with Zeitronix ZT2 & Phormula KS4 knock sensor, 944 turbo all alloy radiator, Hayward & Scott custom tapered race exhaust, GAZ Gold coilovers, Fuch'ed up, Quaife LSD
2017 VW Passat Variant GTE Advance - the daily load lugger and mile muncher
2015 Nissan Leaf Tekna - it builds trees when we drive it


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 Post subject: Re: The Holy Grail: Limited Slip Differential
PostPosted: Sun Jan 31, 2016 10:55 pm 
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Joined: Fri Nov 22, 2013 1:23 pm
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Location: Atherstone
Model: 924 na
Should really stick with the original type gearboxes, which would allow me to fit the Dogleg box as fitted as an option to the N,A assuming this would be the same as the turbo to take a diff, but one of the guys on here who I spoke to said he found the dogleg box very hard to get into first under breaking on the tests when rallying it.

Will see if gripperdiffs or EMC do a diff for my box (Audi 5 speed) as a first step

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Chris Valentine (rallyimp)
1981 924rallye NA white - https://porsche924.co.uk/forum/viewtopi ... 24&t=21236 - https://porsche924.co.uk/forum/viewtopi ... =7&t=20065
1966 Hillman Imp Rally Replica https://porsche924.co.uk/forum/viewtopi ... 10&t=28521
My website https://sites.google.com/site/valeracin ... orsche-924


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 Post subject: Re: The Holy Grail: Limited Slip Differential
PostPosted: Sun Jan 31, 2016 11:03 pm 
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I've never driven a turbo dogleg box but everything I read is they don't like to be rushed in 1st which on a race track they would be on a circuit, but on your stages you will need 1st much more I would think. Plus rebuilding the syncros in the first place would be cost of putting a diff in the audi box which would be 'fit and forget'.

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924T engine with Eaton M90 Supercharger (DB7), 565cc injectors, coil pack ignition, Adaptronic ECU, Custom Air/water charge cooler, Wideband O2 + 4x EGT. 4pot Brembos, Spax adjustable dampers. 951 G'box with LSD & cooler, 944T style bumper. HID Lo-Pro headlights. 968 mirrors, handles + spoiler. Zender rear valance. Custom side skirts, Forged 17" wheels (8J front, 9J rear). Custom hubs (5x114.3 PCD), Twin circuit coolant re-route (2 pumps, 2 'stats, 2 radiators), 6 gauge centre console.


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 Post subject: Re: The Holy Grail: Limited Slip Differential
PostPosted: Sun Jan 31, 2016 11:05 pm 
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Oh yeah, and the dogleg box is longer ratio than the 924 and 944 Boxes, they fall in the middle of normal 944 and the 951 as a half way house.

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924T engine with Eaton M90 Supercharger (DB7), 565cc injectors, coil pack ignition, Adaptronic ECU, Custom Air/water charge cooler, Wideband O2 + 4x EGT. 4pot Brembos, Spax adjustable dampers. 951 G'box with LSD & cooler, 944T style bumper. HID Lo-Pro headlights. 968 mirrors, handles + spoiler. Zender rear valance. Custom side skirts, Forged 17" wheels (8J front, 9J rear). Custom hubs (5x114.3 PCD), Twin circuit coolant re-route (2 pumps, 2 'stats, 2 radiators), 6 gauge centre console.


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 Post subject: Re: The Holy Grail: Limited Slip Differential
PostPosted: Sun Jan 31, 2016 11:27 pm 
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I may be wrong, but the 924 dogleg box and 924 turbo version are completely different and not parts compatible

The turbo dogleg box is super strong let down with syncros as strong as chocolate, especially the ones which get most abuse which are between 1st with 2nd and 2nd with 3rd. Fresh syncros will allow a quickish drop to 1st, but not as hurried as many other boxes. The dogleg box is easy to get used to. Perfect for track and mostly good for rally, except auto solos where you spend a lot of time dropping in and out of 1st

_________________
Steve
1980 924 Turbo Series 1 - Alpine White & Guards Red
Omega forged pistons, lightened and balanced bottom end, ARP studs + Cometic MLS HG, Piper fast road cam, K27/26 3257 hybrid turbo, 951 ducted FMIC, Custom intake manifold, Mittelmotor dizzy & cam pulley, Adj boost - dyno’d at 225bhp @ 1.0bar on previous CGT turbo, Engine datalogged and on boost fuel enrichment managed with Zeitronix ZT2 & Phormula KS4 knock sensor, 944 turbo all alloy radiator, Hayward & Scott custom tapered race exhaust, GAZ Gold coilovers, Fuch'ed up, Quaife LSD
2017 VW Passat Variant GTE Advance - the daily load lugger and mile muncher
2015 Nissan Leaf Tekna - it builds trees when we drive it


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 Post subject: Re: The Holy Grail: Limited Slip Differential
PostPosted: Sun Jan 31, 2016 11:59 pm 
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Location: Stoke On Trent
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Interesting Steve. Didn't know they were different, mind you the non turbo boxes must be super rare!

Chocolate synchro! Love it! :lol:

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924T engine with Eaton M90 Supercharger (DB7), 565cc injectors, coil pack ignition, Adaptronic ECU, Custom Air/water charge cooler, Wideband O2 + 4x EGT. 4pot Brembos, Spax adjustable dampers. 951 G'box with LSD & cooler, 944T style bumper. HID Lo-Pro headlights. 968 mirrors, handles + spoiler. Zender rear valance. Custom side skirts, Forged 17" wheels (8J front, 9J rear). Custom hubs (5x114.3 PCD), Twin circuit coolant re-route (2 pumps, 2 'stats, 2 radiators), 6 gauge centre console.


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