Jump to content
Click here if you are having website access problems ×

Sigma SV - where on earth...


Recommended Posts

... does the earth lead go?


This should be an easy one. As part of the install of my engine, I've bolted a short earth lead to the engine mount. Now I'm damned if I can see anywhere in the build manual where it should bolt to. I'm assuming the engine as it's only 330mm long, so if noone can shed any light, I'll bolt it to the nearest likely looking place - but I'd like it to be right. Any recent Sigma builders ???

Link to comment
Share on other sites


That's where I was planning to go next. I have to say that the wiring, which was always going to be the tough part for me, seems to be the most poorly described. In the half hour or so since my original post I've come across a few more problems/questions. Would you be able to give me a hand (by proxy of course!)?

Link to comment
Share on other sites

As a non-specific reply...

You need an earth that:

a) Goes to the engine block... starter motor retaining bolt is a good place to try.

b) Another that goes to the frame, such as any of the engine mount to frame bolt but not the centre bolt that hold the engine mounting bracket as this is insulated by its rubber insert.



Deliveries by Saffron, *thumbup* the yellow 230bhp Sausage delivery machine

Link to comment
Share on other sites

For all connections in the engine, I used these photos to figure it all out




The 21st phot shows the connection you are after, I think.


Thanks to exfordy




Edited by - gfinlayson on 5 May 2008 09:40:24


Edited by - gfinlayson on 5 May 2008 09:43:36

Link to comment
Share on other sites

  • 1 year later...
  • Area Representative

Make sure this earth lead is well secured (engine chassis mount to engine fixing point on block) as this is the one Caterham say is most critical for the engine systems. My Sigma was very slightly loose and caused a bad misfire between 5-5,250 revs which only Track & Road managed to find on their RR and a few phone calls.





Back in a BEC! - but done alright in Class 1...

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Create New...