G'Day,
Has anyone used 1.08:1 Drop gears, Over 1:1? What is the difference, And how does this affect your gear ratios??? Im using a short ratio straight cut box, will it make it shorter or longer, or are you beter leaving them 1:1 and changing your diff ratio to what you require???

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(KILL #53) Help MotherEarth, squash a Bug.

They are made for race cars - it's easier to change the drops than the diff, so you can change the overall rato for different circuits quickly (well quicker anyway...).

Daniel

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Videos - Turbocharged A-Series on Dyno & at Wakefield
Mafs waz not my strong subgeckt at skkol

Autos have 1.15 to 1 drop gears. This makes a 2.76 diff into the equivalent of a 3.17. Higher number means better acceleration at the expense of more revw at a given road speed.

Auto drop gears don't fit manual boxes, before anyone asks.

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Brett Nicholson
Greendale (near Ballan) VIC.
1971 Morris Mini Moke
1966 Austin Mini
1965 Morris Mini Traveller
1973 LR Series 3 88
2007 LR Freelander 2

And for others wondering, neither does the diff's 2.76 crown wheel and pinion.

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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.

Anyone who wants a 2.76 with a manual needs their head examined anyway. A mate has a 2.76 in his MPi mini and it feels like first gear is missing!

I really need to swap my diff to a 3.2 or 3.4 from an earlier Auto, but I'm just too lazy.

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Brett Nicholson
Greendale (near Ballan) VIC.
1971 Morris Mini Moke
1966 Austin Mini
1965 Morris Mini Traveller
1973 LR Series 3 88
2007 LR Freelander 2

So i should stick with 1:1 straight cuts then??

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(KILL #53) Help MotherEarth, squash a Bug.

I have 2.76 in mine at moment (which is only good on open roads) don't go below 3.2 if you live around traffic(3.4 with small block), you have to calculate the ratio depending on the ratio of your diff. I cannot remember how it goes at moment but i think have to multiply your final drive ratio by the drop gear ratio to get the end result.

and he keeps buying bling bits for it like alloy head, KAD rear disk brakes and who knows what else, but drives it like an old lady - every time I see him I ask him when he's going to compete at Hay, but there's always a lame excuse

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did I tell you that I won a trophy?

He tells me he won't do motorkhanas cos the Kad rear discs are no good for handbrake turns. But what's wrong with a hydraulic handbrake hmmm?

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Brett Nicholson
Greendale (near Ballan) VIC.
1971 Morris Mini Moke
1966 Austin Mini
1965 Morris Mini Traveller
1973 LR Series 3 88
2007 LR Freelander 2

Sounds to me like this guy needs to get out and do a hillclimb or 2. Put that alloy head to good use!

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1964 Morris 850, 1330 Supercharged - 81.8hp atws.
1975 Leyland Mini S 1100S powered - Nice and reliable.
1977 Leyland Mini LS - Project LS-T

i think i remember the friend, in the nicest way he sounds like borat ?

A little, I guess. He's deaf, so he does talk with a sort of accent. But he's very clever with BMC stuff.

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Brett Nicholson
Greendale (near Ballan) VIC.
1971 Morris Mini Moke
1966 Austin Mini
1965 Morris Mini Traveller
1973 LR Series 3 88
2007 LR Freelander 2

tell me about it, ahd a long conve with him in hay this year, and man this guy knows his stuff, very very knowledgeable.