I've finally got round to mounting my speedo cable. As anyone using a Mark 1 MX5 will know, the cable comes out of the gearbox pretty much where
the tunnel starts. I've routed it so it's not in the way of any controls, but I'm wondering about the hole I've had to drill in
order to get the cable through.
I know that brake pipes, fuel lines and electrics all need rubber protection when passing through panels, but what about the speedo cable? I'm
thinking of a 3D printed blanking grommet. The reason I'm thinking about 3d printing is that I want to plug the hole up, but given that both ends
of the cable would mean splitting a rubber grommet, I think I'll have better control with 3D printed grommets. But it's effectively a hard
surface.
Any suggestions? By the way, I do have an Ebay listing bookmarked for rubber blanking grommets if push comes to shove, but I'd rather not go that
route due to the aforementioned 'cutting them in half'.
Can't you just go over-sized with the blanking grommet, cut a wee hole and push the end through it rather than splitting it? However the 3D printed solution seems nice, but maybe overkill. Either way, speedo cables are normally steel braided externally (PU coated) so no harm shoving it through a fairly hard surface, just not a sharp edge.
quote:
Originally posted by coyoteboy
Can't you just go over-sized with the blanking grommet, cut a wee hole and push the end through it rather than splitting it? However the 3D printed solution seems nice, but maybe overkill. Either way, speedo cables are normally steel braided externally (PU coated) so no harm shoving it through a fairly hard surface, just not a sharp edge.
I considered using the speedo cable (from Type 9 gearbox) in my MK Indy. Routing was too awkward though so I switched to an electric signal (magnets +
sensor) to feet my ETB speedo. I'm sure you're aware how stiff the speedo cable is (difficult to route tidily through the car).
That said, you can get right angle converters to better adapt the cable.
https://
www.burtonpower.com/90-degree-speedo-drive-adaptor-gbt9560.html?srsltid=AfmBOoqlMVRc9UYNi_MXxQwSPDlh0bwhiDL943K86zzgNiQPeQ-Tyytz
[Edited on 3-3-25 by nick205]
quote:
Originally posted by nick205
I considered using the speedo cable (from Type 9 gearbox) in my MK Indy. Routing was too awkward though so I switched to an electric signal (magnets + sensor) to feet my ETB speedo. I'm sure you're aware how stiff the speedo cable is (difficult to route tidily through the car).
That said, you can get right angle converters to better adapt the cable.
https:// www.burtonpower.com/90-degree-speedo-drive-adaptor-gbt9560.html?srsltid=AfmBOoqlMVRc9UYNi_MXxQwSPDlh0bwhiDL943K86zzgNiQPeQ-Tyytz
[Edited on 3-3-25 by nick205]
What diameter are the cable ends
What diameter does the hole in the firewall have to be to get the cable through?=A What diameter is the cable?=B Get a grommet with a panel diameter equal to "A" and a cable diameter equal to "B". Run cable through the hole in the firewall. Cut ONLY one side of the grommet. You don't have to make it two pieces. Put the grommet over the cable and put a lube on the grommet and carefully push it into the hole in the firewall. I wish I knew how to post pics. It's a lot easier to show you than type out a description. Russ
quote:
Originally posted by trialsman
What diameter does the hole in the firewall have to be to get the cable through?=A What diameter is the cable?=B Get a grommet with a panel diameter equal to "A" and a cable diameter equal to "B". Run cable through the hole in the firewall. Cut ONLY one side of the grommet. You don't have to make it two pieces. Put the grommet over the cable and put a lube on the grommet and carefully push it into the hole in the firewall. I wish I knew how to post pics. It's a lot easier to show you than type out a description. Russ
The 10mm hole doesn’t have to be in the middle of the grommet so you don’t need a long cut
I would drill a 10mm hole and cut to it before fitting to the car
G