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Upgrading TVR Chimaera Ignition Components

I'm planning a couple of trips to Europe this year and so in the interests of avoiding possible problems I decided to upgrade the ignition system components. I think the ones on the car were original and so could do with an upgrade. Also, as everything was working the old parts would make ideal spares.

The New Parts

I decided to replace (ACT Part Number):
  • HT Leads, Magnecor Reds (ACTIG004)
  • Coil, Bosch (ACTIGA04)
  • Distributor Cap (ACTIGA01)
  • Rotor Arm (ACTIGA02)
  • Plug Extenders (ACTIG005)

I got all of these from ACT.

Replacement Process

I started with the rotor arm, it's just a matter of removing the distributor cap and then it's a pull-push replacement.

The new and old rotor arms:

Next I replaced the distributor cap, I marked the location of the number 1 feed and then switched them over. Then using the diagrams in the bible I worked through each cylinder as follows:

  • Removed the old lead and plug extenders
  • Connected the new plug extenders to the leads
  • Attached the extenders to the plugs
  • Routed the leads to the distributor

New vs. old plug extenders:


New Leads in place:

Replacing the coil was fairly straight forward but quite fiddly. Just undo the two securing bolts taking care not to drop the nuts / washers (which I managed to do several times). The connecting wires only go one way, there are two male and two female spade connectors.

The old coil:

The new coil:

After all that I was sure that I'd have missed something or not connected something. However a quick test-drive revealed that all was well. I think that the engine felt slightly smoother but that's probably just the "I spent money on it so it must be better" effect!



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