Alfa Romeo Owners Club of Australia Forum

Technical => 105/115 Series (105 Coupe/Spider/Berlina) => Topic started by: mgbalfa on June 16, 2013, 05:07:26 PM

Title: 105 diff
Post by: mgbalfa on June 16, 2013, 05:07:26 PM
Can anyone tell me how wide a 105 diff is from  axle flange to axle flange .
Thank you
Title: Re: 105 diff
Post by: giulia_veloce on June 17, 2013, 07:02:22 AM
1390 mm

so say= 1400 mm

Robert
Title: Re: 105 diff
Post by: mgbalfa on June 17, 2013, 02:36:29 PM
Thanks for that. How strong are they and what is the availability and cost of parts like
Axles LSD , crown wheel & pinion .
Title: Re: 105 diff
Post by: giulia_veloce on June 17, 2013, 07:25:33 PM
Quote from: mgbalfa on June 17, 2013, 02:36:29 PM
Thanks for that. How strong are they and what is the availability and cost of parts like
Axles LSD , crown wheel & pinion .

All depends what you want to do with one.
What did you have in mind with one ?
Road ?...track ?,,rally ?,,dirt ?abuse ?,,burnouts ?

Title: Re: 105 diff
Post by: pancho on June 17, 2013, 07:48:42 PM
Rob,

I'll choose F please.

F for burnouts.
Title: Re: 105 diff
Post by: mgbalfa on June 17, 2013, 08:24:27 PM
Hi guys
Track work is what I hope to be doing . hill climbs mainly.
But it will be out for Sunday drives.
Title: Re: 105 diff
Post by: giulia_veloce on June 17, 2013, 09:02:13 PM
Quote from: pancho on June 17, 2013, 07:48:42 PM
Rob,

I'll choose F please.

F for burnouts.

They can do that easily Pancho.You wont bust one with what you are going to use it for.

I guess im waiting for MGBalfa to tell us what type of car,and HP and engine capacity + ratio he will want the diff for.
Most out there wont need any more than a standard 1 wheel screamer anyway
Title: Re: 105 diff
Post by: mgbalfa on June 17, 2013, 09:17:30 PM
67 MGB Roadster
2lt harvested from an  82 Alfetta
105  gearbox
3.9  or 4.1 ratio diff  to start with
Hopefully 140 -160 HP
Title: Re: 105 diff
Post by: Neil Choi on June 17, 2013, 10:23:48 PM
Hi MgbAlfa,

With regards to your 2L motor, are you expecting 140-160bhp at the flywheel or at the wheels?  If at the wheels, can you give me a clue/ideas on how you will do it?  ie what internals, carbs, cams etc etc.  Nothing sinister, but just learning and see what others have done and possibly lead to some healthy discussion.

Regards
Neil
Title: Re: 105 diff
Post by: mgbalfa on June 18, 2013, 01:23:14 PM
Hi Neil
140 HP @ flywheel with cams , head work and good carb tune, I am told should be quite achievable .
With more R&D, injection ,exhaust system 160hp may be possible.
Any thoughts . Am I on the right track ?
Thanks
Title: Re: 105 diff
Post by: Beatle on June 18, 2013, 07:57:33 PM
On spoke wheels............with knock-off hubs.........???? :o
Title: Re: 105 diff
Post by: mgbalfa on June 19, 2013, 07:40:56 AM
No mate . Have changed the front hubs to suit bolt on rims . That is why I asked the question regarding the 105 diff.
Have now found a guy at the gold coast , he can graft nissan R31  axle tubes on to a hilux Housing , to the width i need (1320mm) with new custom axles, pcd 114.3mm  x4 32spline utilizing the rear Nissan  disk brakes . Wheels I may be using 205 45 16
Title: Re: 105 diff
Post by: aggie57 on June 19, 2013, 08:28:01 AM
Sounds like a fun project.  Personally I always found the old B a lovely looking thing and simple in the way of post-war British sports cars, but like other British sports cars it lacked any sort of quality underneath.  And when they did try to be creative (think Stag, Dolomite Sprint, Jensen Healey) they generally forgot to make sure it still worked reliably!

Look forward to hearing more and seeing pictures.
Title: Re: 105 diff
Post by: mgbalfa on June 23, 2013, 07:22:02 PM
Mock up stage
Title: Re: 105 diff
Post by: mgbalfa on June 23, 2013, 07:50:13 PM
All the body work is done car in 2pac epoxy . Ready for paint
The pedal box has been removed . I have fitted floor mounted wilwood pedal assemblies.