RPM in Road Speed

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chriscburgess
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RPM in Road Speed

Post by chriscburgess »

1.9dg 5 speed

my speedo cable has just broken and I am going away tomorrow in the van. Does anyone know if there is a chart somewhere which correlates RPM in road speed for each gear so that i can at least try to keep in the speed limit - LOL!

e.g. 2000rpm equal 40 mph in 5th etc. (this is probably not true but just an example of what i am looking for.

Thanks

Also where is the best place to get a new cable and how easy is it to fit please?

Chris
T25 1984 Westfalia pop 1.9DG

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bigherb
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Re: RPM in Road Speed

Post by bigherb »

It depends on the gearbox and tyre size but early boxes where around 15mph in 4th and 18mph in 5th per 1000rpm.

Cables are usually made by the same company Gemo so whoever is the cheapest with postage.
Check first if you have the screw on end to the instruments or the clip on end.

Straight forward to fit make sure the seal in the back of the stub axle is a tight fit, and seal the end where it comes through the grease cap with sealant, the cable should curve down away from the stub axle so water runs away from the stub axle.
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chriscburgess
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Re: RPM in Road Speed

Post by chriscburgess »

Fantastic Thanks!

Its a 1984 on standard wheels and tyres so i guess it is an early box.

I'll stick a post it note on the dash.

Cheers!
T25 1984 Westfalia pop 1.9DG

nesty
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Re: RPM in Road Speed

Post by nesty »

bigherb wrote:It depends on the gearbox and tyre size but early boxes where around 15mph in 4th and 18mph in 5th per 1000rpm.

Cables are usually made by the same company Gemo so whoever is the cheapest with postage.
Check first if you have the screw on end to the instruments or the clip on end.

Straight forward to fit make sure the seal in the back of the stub axle is a tight fit, and seal the end where it comes through the grease cap with sealant, the cable should curve down away from the stub axle so water runs away from the stub axle.

Been on a trip recently and I noted about 65mph I was doing around 3,300rpm. Mine is a 4 speed with 16' wheels though!
Holdsworth Villa2 1983 1.9 DG, 4 Speed, LPG & Petrol+underslung leisure tank

mike9009
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Re: RPM in Road Speed

Post by mike9009 »

Hi

Could you use your phone and some GPS tracker to display your speed accurately? I use HERE Maps which is free and you can download maps (so saves data usage). Displays your current speed at all times.


Mike

chriscburgess
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Re: RPM in Road Speed

Post by chriscburgess »

mike9009 wrote:Hi

Could you use your phone and some GPS tracker to display your speed accurately? I use HERE Maps which is free and you can download maps (so saves data usage). Displays your current speed at all times.


Mike
yes good idea. apparently Waze does the same.

I actually had chart taped to the dash with the relevant rpm and mph on for the weekend but have now manged to replace the cable.
T25 1984 Westfalia pop 1.9DG

F-i-s-z
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Re: RPM in Road Speed

Post by F-i-s-z »

U can use Google maps app. Download velociraptor app and this app will display speed limits and your actual speed. Using every day in my westy.
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Ian Hulley
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Re: RPM in Road Speed

Post by Ian Hulley »

Replace the speedo cable ... 20 minute job.

Ian
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