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volkmini
PostPosted: Mon Dec 03, 2007 7:53 pm 
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hi, how hard is it to get a diff ratio under 3.44. i'm wanting a diff for the highway. i have noticed that some diff ratios only suit a+ gearbox casings. will they fit both.
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drmini in aust
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PostPosted: Mon Dec 03, 2007 7:55 pm 
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Location: near Baulkham Hills, NSW
Yes the A+ ones will fit both boxes but teeth angles are different so you need both the pinion and crownwheel. :wink:

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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volkmini
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PostPosted: Mon Dec 03, 2007 8:31 pm 
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is the lower ratios harder to get
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poeee
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PostPosted: Mon Dec 03, 2007 8:33 pm 
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Yes very hard to find and expensive.

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drmini in aust
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PostPosted: Mon Dec 03, 2007 8:35 pm 
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No minis were sold here with lower than a 3.44.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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simon k
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PostPosted: Mon Dec 03, 2007 8:46 pm 
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Location: Wodonga - Vic/NSW border
contact brickworx or miniimports

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volkmini
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PostPosted: Tue Dec 04, 2007 4:15 pm 
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thanks, i will try and contact them. does anyone run a low ratio diff, is it worth getting one for a 1380. i'm wanting it for cruising highways with little revs.
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TheMiniMan
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PostPosted: Tue Dec 04, 2007 4:48 pm 
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yes i run a 3.2:1 with my 1510cc engine & it`s good for that but you really need to have the grunt to pull such a tall gear.

I actually hate small engines with tall gearing, it just makes them dohey pigs :-)

& just so you don`t get all reved up & set up & ready to go for the swap only to come to a grinding halt,,,, you will need the larger diameter bearing retainer to fit the larger pinion gear into... The later type retainer for use with the tall gear set are made with a bigger hole in the guts so the big pinion gear fits & also utilises only 3 of the 4 "usual" mounting bolts.

oky-doky???

:-)

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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

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Last edited by TheMiniMan on Tue Dec 04, 2007 8:32 pm, edited 1 time in total.

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jbeenz
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PostPosted: Tue Dec 04, 2007 5:07 pm 
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Location: New Zealand (whangarei)
TheMiniMan wrote:
yes i run a 3.2:1 with my 1510cc engine & it`s good for that but you really need to have the grunt to pull such a tall gear.

I actually hate small engines with tall gearing, it just makes them dohey pigs :-)

& just so you don`t get all reved up & set up & ready to go for the swap only to come to a grinding halt,,,, you will need the lager diameter bearing retainer to fit the larger pinion gear into... The later type retainer for use with the tall gear set are made with a bigger hole in the guts so the big pinion gear fits & also utilises only 3 of the 4 "usual" mounting bolts.

oky-doky???

:-)


Read that again...grinding it out is a dog of a job! although, a drum sander on a press helps.

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mattsmini1971
 Post subject: 2.9
PostPosted: Tue Dec 04, 2007 5:28 pm 
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Location: coffs harbour
hi i have a 2.9 ratio in my car. really good on the highway...(3100rpm at 100km/h
i know what you other guys say about it though but its my car and i luv it. lol :D :D

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volkmini
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PostPosted: Tue Dec 04, 2007 7:59 pm 
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so 3.44 gives you the alround package
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