Rev Limiter

I decided that a rev limiter would probably be a good idea as when the wheels spin in 1st or 2nd (and sometimes 3rd) the revs can rise so quickly you can't get off the throttle fast enough. Thanks to the good old UK Cobra forum, I am the proud owner of a Pertronix rev limiter. Limit set to 5400 as per engine builders spec.

Installation is easy peasy, you tee off the +ve and tach from the distributor, add an earth and you're done. I had no idea how these work but its fairly straightforward. The box looks at the tacho feed and when it goes over the limit it dumps the power feed for the distributor to ground through a resistor and hey presto - no spark and engine revs drop. Revs drop below the limit and the distributor power feed comes back on again.

I found somewhere nice and discreet for it to go, on the bulkhead behind the header tank. (header tank temporarily removed in photos below)

The only minor annoyance was that the branch of the wiring loom that this fits into has the water temp/oil temp/ oil pressure wires on it so I had to disconnect all of these and re-do the sleeving but I now have a deep feeling of joy and satisfaction at a job properly done. We could easily have just bodged on an extra couple of wires but managed to resist the temptation.