Blue, Review the Tech Info I suggested. You'll see at least 2 different 18 tooth pinions and three different 62 tooth crown wheels. As pixie said, you can't mix and match.

the gears are put togther as sets , you can not take any 18  and put it to any 62   some gears are the same but many are diffrent diamiters .   some gears gave part numbers which you can use to determin if they are a set.    

Gents,

 I found the Guessworks site to be very useful , however i'm trying to mesh a 18 tooth pinion with a 62 tooth pinion crown wheel  to gain a 3.444 fd, but it locks up....

donsobering  i'm  going with a 17 /62  gearing to get a 3.647 fd with the 13's .. this should give me an okay all round performance as my redline  is around 6500rpm

 

Thanks for the help

if everything seems under control,. then you're not going fast enough

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Don't forget that with 13" wheels the tyre aspect drops accordingly to maintain the same rolling diameter.
To all intents & purposes, a Sportspack is geared the same as a Mk1...

The best all round FD depends entirely on personal choice.
I have std 3.76 FDs in my Elfs, and ran a 3.44 in the estate quite happily. Once I get the new engine & 'box broken in I'll be able to comment on the 3.1 I've fitted to it, but I'm expecting it to be more economical at the expense of acceleration and quite acceptable just like the others.

Metric is for people who can't do fractions.

Have both 3.44:1 and 3.63:1 available...former brand new.

Mini friends!  Mini rides!

Restored/modified Mini 1000 with 1380cc power unit, 2.95:1 FD, adj. suspension, S discs/drums, 10x5 Minilites, 165x70 A008s, custom trim and matching custom trailer.

woops  missed that  Don     My bad ,     may try a 3.44   with 13 inch wheels. would be what I had in one mini  that worked well .  

Guys He said "with 13 inch wheels". 3.9 or 3.7 are the only ratios you could consider. 2.76 and 13's would give you a 60 MPH 1st gear.

 I agree the 2.76   would be right    minis were always  geared to low . ie you rev to much. 

and I went to the 2.76 from the 3.2

For checking various combinations, this site is good:

http://www.guess-works.com/Gearbox/ratio.htm

and one of the Calver articles is here:

http://www.minimania.com/web/SCatagory/ENGINE/DisplayType/Calver%27s%20Corner/DisplayID/889/ArticleV.cfm

As Chuck said it depends on your use of the car. I have been happy with the 3.1 in my car, but I was coming from a 2.76

maybe some useful links for you here:

http://www.minimania.com/web/threadid/91610/InfoID/1/SiteMessages/11/msgthread.cfm

 

A FATHER CARRIES PICTURES WHERE HIS MONEY USED TO BE 

1130cc, 12g295, SW5 cam, LCB, HIF38, CA spec.

Lots of information under Articles on this site. Try Calver's Corner.

Final drive depends upon the car's use.

Various Final Drives are made by using matching sets of crownwheel and pinions of different tooth counts right?

 is there a site . or can someone list the combinations gear teeth and which final drive it would yeild?

 

Also , what would be the best allround fd  to use on a  1275 with stage 1 mods , running 13" wheels?

Thanks

if everything seems under control,. then you're not going fast enough

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