Speedo Bounce

An alchemy of sparks, copper wire and earth

Moderators: User administrators, Moderators

Re: Speedo Bounce

Postby Sir Brixalot » 11 Jul 2018, 08:48

I used 3 in 1 a few months ago. Made no difference
1989 Autosleeper Auto 1-9 DG with LPG conversion
Sir Brixalot
 
Posts: 3640
Joined: 15 Oct 2010, 21:55
Location: Brixton Town
80-90 Mem No: 8927

Re: Speedo Bounce

Postby R0B » 11 Jul 2018, 08:54

Do you know if your cable is one of the Gemo ones or not?
2.1 LPG/Petrol Auto Caravelle
User avatar
R0B
Moderator
 
Posts: 15698
Joined: 07 Oct 2005, 17:33
Location: Cheshire
80-90 Mem No: 864

Re: Speedo Bounce

Postby NicBeeee » 11 Jul 2018, 12:36

Has anyone laid down the cable straight removed the cluster and connected the cable to a drill, be an interesting experiment to see how much bending the cable can take before bouncing the needle.
“A sure cure for seasickness is to sit under a tree.” ― Spike Milligan

1988 1.9 DG
NicBeeee
 
Posts: 625
Joined: 12 Aug 2010, 06:57
Location: Fairly close to Hinckley
80-90 Mem No: 8608

Re: Speedo Bounce

Postby itchyfeet » 11 Jul 2018, 16:18

I have asked Brickwerks who are going to look into it. :ok
1988 DG WBX LPG Tin Top
1989 DJ digijet WBX Holdsworth Villa 3 Pop Top
itchylinks
User avatar
itchyfeet
 
Posts: 10262
Joined: 23 Jul 2007, 17:24
Location: South Hampshire
80-90 Mem No: 12733

Re: Speedo Bounce

Postby itchyfeet » 11 Jul 2018, 16:21

NicBeeee wrote:Has anyone laid down the cable straight removed the cluster and connected the cable to a drill, be an interesting experiment to see how much bending the cable can take before bouncing the needle.


I don't have a spare speedo or I would, I try not to disturb the cluster if I can help it in case of breaking it.
1988 DG WBX LPG Tin Top
1989 DJ digijet WBX Holdsworth Villa 3 Pop Top
itchylinks
User avatar
itchyfeet
 
Posts: 10262
Joined: 23 Jul 2007, 17:24
Location: South Hampshire
80-90 Mem No: 12733

Re: Speedo Bounce

Postby Oldiebut goodie » 11 Jul 2018, 18:09

NicBeeee wrote:Has anyone laid down the cable straight removed the cluster and connected the cable to a drill, be an interesting experiment to see how much bending the cable can take before bouncing the needle.

Yes - in the samba link.
1Y 1.9d 1987 Hi-top Caravelle
508d Merc ex-bus
User avatar
Oldiebut goodie
 
Posts: 5642
Joined: 18 Apr 2008, 01:19
Location: Eastern Angle
80-90 Mem No: 11135

Re: Speedo Bounce

Postby itchyfeet » 11 Jul 2018, 18:49

937carrera wrote:There's not quite enough showing, but is the angle of the coils on the inner Gemo cable greater than on the VW one ?

Would that mean a less rigid inner cable, one more likely to kink ?


looks bigger diameter to me, need to measure...
ImageP1100459 by Paul_Barr, on Flickr
1988 DG WBX LPG Tin Top
1989 DJ digijet WBX Holdsworth Villa 3 Pop Top
itchylinks
User avatar
itchyfeet
 
Posts: 10262
Joined: 23 Jul 2007, 17:24
Location: South Hampshire
80-90 Mem No: 12733

Re: Speedo Bounce

Postby Oldiebut goodie » 11 Jul 2018, 19:02

It looks to me that the upper (Gemo) one has a lot of wear on the inner cable where it contacts the outer spirals - the original has a shoulder to hold it central there. Possibly that doesn't help.
1Y 1.9d 1987 Hi-top Caravelle
508d Merc ex-bus
User avatar
Oldiebut goodie
 
Posts: 5642
Joined: 18 Apr 2008, 01:19
Location: Eastern Angle
80-90 Mem No: 11135

Re: Speedo Bounce

Postby tobydog » 11 Jul 2018, 20:14

Larger diameter cable = larger (minimum) bend radius
Knowledge is power
1970 CU
tobydog
 
Posts: 552
Joined: 07 Mar 2009, 21:03
Location: Near Saarfend, Essex
80-90 Mem No: 6484

Re: Speedo Bounce

Postby itchyfeet » 11 Jul 2018, 20:41

I'd say more clearance in the VW cable but still got to measure as best I can.

ImageP1100463 by Paul_Barr, on Flickr
1988 DG WBX LPG Tin Top
1989 DJ digijet WBX Holdsworth Villa 3 Pop Top
itchylinks
User avatar
itchyfeet
 
Posts: 10262
Joined: 23 Jul 2007, 17:24
Location: South Hampshire
80-90 Mem No: 12733

Re: Speedo Bounce

Postby bigbadbob76 » 11 Jul 2018, 21:50

NicBeeee wrote:Has anyone laid down the cable straight removed the cluster and connected the cable to a drill, be an interesting experiment to see how much bending the cable can take before bouncing the needle.


I just tried this with a new unused Gemo cable, no speedo connected, I could bend it into an 8" circle before it started jumping.
Doesn't help much as the Gemo cables seem to last for a few weeks from new.
I did wonder if having an S bend in the cable would make it jump more. it didn't with the new one but might with an older one.
'86 1.9 DG, 4 speed, camper.
'Q 2cv6 trike with diy EFI.
'03 Furred ranger.
'95 Suzuki bandit 750.
User avatar
bigbadbob76
 
Posts: 1541
Joined: 07 Nov 2016, 14:41
Location: Isle of Skye
80-90 Mem No: 15707

Re: Speedo Bounce

Postby itchyfeet » 12 Jul 2018, 05:12

8 inch circle being diameter or radius?
I'm not 100% clear if the Gemo above is the one I bought a year or two ago or the one I bought several years ago and only fitted recently.
When I pull the other one put I will compare if it's different again.
1988 DG WBX LPG Tin Top
1989 DJ digijet WBX Holdsworth Villa 3 Pop Top
itchylinks
User avatar
itchyfeet
 
Posts: 10262
Joined: 23 Jul 2007, 17:24
Location: South Hampshire
80-90 Mem No: 12733

Re: Speedo Bounce

Postby diabolov » 12 Jul 2018, 10:18

looking at the pictures..

I was wondering due to the gaps in the outer casing of the Gemo cable, would the inner spiral be 'threading'' on the inside where the cable bends
round corners and jumping threads when the tension gets too much?? causing the bouncing?? as both wound in the same direction.
The VW cable doesn't have gaps in the outer casing...

Can you fit the Gemo inner into the VW outer and still get the bounce?.

M
Autohomes Kamper 1986 WBX 1.9 DG
User avatar
diabolov
 
Posts: 90
Joined: 24 Aug 2015, 12:41
Location: eastbourne-ish
80-90 Mem No: 14844

Re: Speedo Bounce

Postby itchyfeet » 12 Jul 2018, 11:12

diabolov wrote:looking at the pictures..

I was wondering due to the gaps in the outer casing of the Gemo cable, would the inner spiral be 'threading'' on the inside where the cable bends
round corners and jumping threads when the tension gets too much?? causing the bouncing?? as both wound in the same direction.
The VW cable doesn't have gaps in the outer casing...

Can you fit the Gemo inner into the VW outer and still get the bounce?.

M



Agree this is a possability and I wrot the same above but just not as well as you

you cant seperate inner frpm outer they have crimped ends both ends.
1988 DG WBX LPG Tin Top
1989 DJ digijet WBX Holdsworth Villa 3 Pop Top
itchylinks
User avatar
itchyfeet
 
Posts: 10262
Joined: 23 Jul 2007, 17:24
Location: South Hampshire
80-90 Mem No: 12733

Re: Speedo Bounce

Postby diabolov » 12 Jul 2018, 12:42

Ah! yes indeed you did. Sorry didn't go back far enough to pick up the ''story so far''

M
Autohomes Kamper 1986 WBX 1.9 DG
User avatar
diabolov
 
Posts: 90
Joined: 24 Aug 2015, 12:41
Location: eastbourne-ish
80-90 Mem No: 14844

PreviousNext

Return to Electrical & Instrumentation

Who is online

Users browsing this forum: milkman and 9 guests

cron