Require some expert help please.
Just about to reinstall my motor/gearbox in a 66 Deluxe. Motor is a 1098, 3.44 diff, 165/70 x 10 tyres, standard black 90 mph speedo.
I'm sure the speedo will be out, maybe actually read under. Can the speedo gear/pinion whatsi thing be changed at the gearbox or do I really need to change the speedo out for cooper s. Not really keen on putting dymo tape stickers on the speedo.

Thanks.

it's for UK minis, but you'll find the right combination in here - http://www.guess-works.com/Tech/ratio.htm

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did I tell you that I won a trophy?

And thanks again Simon. 2 out of 2.

lol, no worries

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did I tell you that I won a trophy?

Just checked Simon, up to 6000 rpm, pretty well spot on. Happy with that.

awesome site

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1968 Morris Mini Cooper S

Guess works sells the pinions as well just PayPal them and wait a couple of weeks


Sent from my iPhone using Tapatalk

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Did i tell you that all my minis are 850's ?

Bugger. I just checked this again, was reading the chart wrong. My speedo is the standard black 90mph 1408 turns per minute type as indicated on the speedo face. Speedo pinion and drive gears in the gearbox are 6 and 17 tooth types. The chart shows at 60mph indication on the speedo, actual speed is 66 mph. Without going to a Cooper S 120mph 1280tpm type speedo (unless I got it cheap), can the gears in the gearbox be changed to bring the tpm back to near 1280 tpm. Or, does anyone do reduction gears that screw on to the back of the speedo.

Any info much appreciated.

The guessworks calculator should suggest the best speedo drive gears given your diff ratio and speedo TPM. We have a similar issue (3.44 diff and Mini K 90mph speedo) and ordered the drive gears from guessworks.

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*witty signature*

Sapphire Blue Deluxe spread across three parts cars, two sheds and a driveway...

Thanks Matt. I'll go back into guessworks and see whats available.

Bugger. I just checked this again, was reading the chart wrong. My speedo is the standard black 90mph 1408 turns per mile type as indicated on the speedo face.

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"Show me the Mini!"

It's easy to read the chart wrong.

That's a bugger, same speedo as mine. I guess we'll be in the next bidding war for a 1280 cooper s speedo ! Happy bidding.

You may want to check the possibility and cost to recalibrate your existing speedo.

http://www.howardinstruments.com.au/

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ex-NSW Police 1970 MK II Cooper S
VMCI #43

Thanks Doug, they may be the next best bet.

7/18 are the gears for a 1408TPM speedo and 3.44 diff if you can find them.

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*witty signature*

Sapphire Blue Deluxe spread across three parts cars, two sheds and a driveway...