Speedo Not Working

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deano
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Re: Speedo Not Working

Post by deano »

Cortina wrote: Tue Jul 16, 2024 7:22 pm If it helps you (or anyone else ?) I have "The Tool" to make round speedo cable inner into square. (from memory there are 2 size options). A most "interesting" device , and NOT the sort of thing most people have in their toolbox !

It weighs about 5 kg ... guess, and probably cost a fortune ... the things ones buys 40 years ago at public auctions !
Ooo, can we see a picture of it please?! :bounce:
Dean
1973T Targa MFI 334 met blu- under restoration https://www.ddk-online.com/phpBB2/viewt ... 28&t=67060
1980 924 Turbo, blu/grn tartan - restored
knapmann
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Re: Speedo Not Working

Post by knapmann »

well my replacement cable has arrived from Roger Bray, its a foot longer than my original. Also unlike my original where it is crimped on only one end and you can pull out the cable, this new one is crimped on both ends. I could start cutting up the cable to try and make it fit but why should I? It should be correct. Its advertised as a 65-71 speedo cable... maybe its for LHD cars? however I would expect LHD cables to be even shorter than my RHD one if anything as the speedo is more central in the car. I cannot see how this cable would fit any 65-71 car with a 901/911 gearbox. Maybe it will fit with a load of slack in the tunnel or something but I dont want to spend hours trying to find out it doesnt work. Maybe its for a 915 gearbox car? im not sure where the speedo take off is on one of those cars.
Last edited by knapmann on Wed Jul 17, 2024 3:59 pm, edited 1 time in total.
Cortina
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Re: Speedo Not Working

Post by Cortina »

deano wrote: Wed Jul 17, 2024 10:39 am
Cortina wrote: Tue Jul 16, 2024 7:22 pm If it helps you (or anyone else ?) I have "The Tool" to make round speedo cable inner into square. (from memory there are 2 size options). A most "interesting" device , and NOT the sort of thing most people have in their toolbox !

It weighs about 5 kg ... guess, and probably cost a fortune ... the things ones buys 40 years ago at public auctions !
Ooo, can we see a picture of it please?! :bounce:
Yes , bear with me while I find a camera etc ............... Still in it's original box !!!
Royal Enfield .. still in India
GL 1800 Tour DCT, for pleasure / Fantic 240 Professional - play
Rally 911 (1966) build parked for a while
Rally 928 (work started again - inc serious weight loss programe !)
.... and now another VW Up GTI owner.
RobFrost
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Re: Speedo Not Working

Post by RobFrost »

knapmann wrote: Wed Jul 17, 2024 11:47 am well my replacement cable has arrived from Roger Bray, its a foot loner than my original. Also unlike my original where it is crimped on only one end and you can pull out the cable, this new one is crimped on both ends. I could start cutting up the cable to try and make it fit but why should I? It should be correct. Its advertised as a 65-71 speedo cable... maybe its for LHD cars? however I would expect LHD cables to be even shorter than my RHD one if anything as the speedo is more central in the car. I cannot see how this cable would fit any 65-71 car with a 901/911 gearbox. Maybe it will fit with a load of slack in the tunnel or something but I dont want to spend hours trying to find out it doesnt work. Maybe its for a 915 gearbox car? im not sure where the speedo take off is on one of those cars.
a. The cable you took out may not be original. It may have snapped once before and been shortened, especially if it lacks the pressing on the speedo end of the inner worm, which prevents the worm pulling through towards the gearbox. The Roger Bray way is the original way, I believe, with the worm not removeable unless it has broken.

b. I'm sure the route will be quite different for LHD vs RHD cars as mine went through the bulkhead area which differs quite a bit between LHD/RHD.

c. surplus cable should not be a problem, provided you can find a slightly longer route for it without too tight a bend anywhere. I can measure my original (1970) cable if you want and confirm the length. I believe 1970 is indeed a touch longer than SWB cars at 2750 vs 2480mm but they sell the longer one as a one-size fits all.
1970 911T, Signal orange (Restoration thread)
1988 3.2 Carrera backdate, Black
2001 996 Turbo, Lapis blue (am I allowed to put that here?)
I'm looking for a pre-impact bumper 911S or other high-revving 911 to restore - please let me know if you see one.
Cortina
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Re: Speedo Not Working

Post by Cortina »

Let's see if I can just insert 2 photos .... by the way , I lied about the weight ! (Tool is 9.56kg !)
You do not have the required permissions to view the files attached to this post.
Royal Enfield .. still in India
GL 1800 Tour DCT, for pleasure / Fantic 240 Professional - play
Rally 911 (1966) build parked for a while
Rally 928 (work started again - inc serious weight loss programe !)
.... and now another VW Up GTI owner.
deano
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Re: Speedo Not Working

Post by deano »

Nice, thanks for posting the tool pics.

Looks handy, if one ever has a problem finding the correct length cable 8) :lol:
Dean
1973T Targa MFI 334 met blu- under restoration https://www.ddk-online.com/phpBB2/viewt ... 28&t=67060
1980 924 Turbo, blu/grn tartan - restored
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Re: Speedo Not Working

Post by SeanP »

1966 912
1969 912/6 hotish rod in build
1974 914 Dead
LI 125 Lambretta (Yeah right it’s a 125)
Mini Cooper s
knapmann
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Re: Speedo Not Working

Post by knapmann »

Hi Sean

my only concern is that this looks identical to the one I have from Roger Bray and is also advertised as 65-71. Ill have to send the one I have back and order this one but im expecting it to be equally incorrect.

In the mean time i have welded the two ends of my original cable back together and re-installed it... maybe I can run a sweep on how long it will last!
RobFrost
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Re: Speedo Not Working

Post by RobFrost »

knapmann wrote: Wed Jul 17, 2024 4:02 pm
Hi Sean

my only concern is that this looks identical to the one I have from Roger Bray and is also advertised as 65-71. Ill have to send the one I have back and order this one but im expecting it to be equally incorrect.

In the mean time i have welded the two ends of my original cable back together and re-installed it... maybe I can run a sweep on how long it will last!
Probably telling my nan how to suck eggs here but in case it's not obvious, I'd blow out the old sleeve with compressed air, wash with an evaporative cleaner such as carb or brake cleaner, blow out again, and re-lubricate with lithium grease, for the best chance of it lasting.
1970 911T, Signal orange (Restoration thread)
1988 3.2 Carrera backdate, Black
2001 996 Turbo, Lapis blue (am I allowed to put that here?)
I'm looking for a pre-impact bumper 911S or other high-revving 911 to restore - please let me know if you see one.
SeanP
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Posts: 854
Joined: Thu Sep 06, 2012 11:59 pm
Location: North West Essex

Re: Speedo Not Working

Post by SeanP »

knapmann wrote: Wed Jul 17, 2024 4:02 pm
Hi Sean

my only concern is that this looks identical to the one I have from Roger Bray and is also advertised as 65-71. Ill have to send the one I have back and order this one but im expecting it to be equally incorrect.

In the mean time i have welded the two ends of my original cable back together and re-installed it... maybe I can run a sweep on how long it will last!
I fitted the carpoint one to mine after trying a few of the usual suspects offerings including Porsche. The carpoint one was the same length as the original. I have purchased a lot of parts from carpoint and must say that the quality and fitment of the parts that they supply is on par with the original porsche items, and often they are cheaper than most suppliers including delivery, remember you don’t pay the VAT on orders under £135 including delivery so I tend to wait and order several bits that I need.

I’ll give the welded one three mile's. It’s the last couple of feet up to the speedo that’s the cable killer!
The porsche offering I bought (read that as very long and expensive and used in the 74 on cars lasted all of about 300 yards before it snapped).
1966 912
1969 912/6 hotish rod in build
1974 914 Dead
LI 125 Lambretta (Yeah right it’s a 125)
Mini Cooper s
knapmann
DDK slapper chatter
Posts: 481
Joined: Mon May 18, 2020 4:01 pm

Re: Speedo Not Working

Post by knapmann »

SeanP wrote: Wed Jul 17, 2024 8:09 pm
knapmann wrote: Wed Jul 17, 2024 4:02 pm
Hi Sean

my only concern is that this looks identical to the one I have from Roger Bray and is also advertised as 65-71. Ill have to send the one I have back and order this one but im expecting it to be equally incorrect.

In the mean time i have welded the two ends of my original cable back together and re-installed it... maybe I can run a sweep on how long it will last!
I fitted the carpoint one to mine after trying a few of the usual suspects offerings including Porsche. The carpoint one was the same length as the original. I have purchased a lot of parts from carpoint and must say that the quality and fitment of the parts that they supply is on par with the original porsche items, and often they are cheaper than most suppliers including delivery, remember you don’t pay the VAT on orders under £135 including delivery so I tend to wait and order several bits that I need.

I’ll give the welded one three mile's. It’s the last couple of feet up to the speedo that’s the cable killer!
The porsche offering I bought (read that as very long and expensive and used in the 74 on cars lasted all of about 300 yards before it snapped).
You win the sweep, 3 miles was pretty much bang on. Its dead already, was worth a try though!
RobFrost
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Re: Speedo Not Working

Post by RobFrost »

I'd check by hand if the speedo is turning. Put the end of the core in and see how freely it turns, by hand.

There's a plastic cog within the speedo which degrades.

Sent from my SM-S918B using Tapatalk


1970 911T, Signal orange (Restoration thread)
1988 3.2 Carrera backdate, Black
2001 996 Turbo, Lapis blue (am I allowed to put that here?)
I'm looking for a pre-impact bumper 911S or other high-revving 911 to restore - please let me know if you see one.
SeanP
I luv DDK!
Posts: 854
Joined: Thu Sep 06, 2012 11:59 pm
Location: North West Essex

Re: Speedo Not Working

Post by SeanP »

It wont be the speedo as that is confirmed as working. Its the torque going through the length of spring wire (which the speedo cable is made of) along its length with dirt/rust/dried grease in the cable sheave combined with a new weak spot of it being welded together all causing binding/tension spots that have to be released
1966 912
1969 912/6 hotish rod in build
1974 914 Dead
LI 125 Lambretta (Yeah right it’s a 125)
Mini Cooper s
Lightweight_911
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Re: Speedo Not Working

Post by Lightweight_911 »

.

I've found in the past that inner cable breakage can also be aggravated by the outer cable being routed through too tight a radius ...

.
Andy

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- subtracting weight makes you faster everywhere”
knapmann
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Re: Speedo Not Working

Post by knapmann »

Lightweight_911 wrote: Thu Jul 18, 2024 1:21 pm .

I've found in the past that inner cable breakage can also be aggravated by the outer cable being routed through too tight a radius ...

.
This is the problem with trying to fit a longer than standard cable in the car, even though im sure sellers will say they can still be made to work...
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