Lotus Elan

Rev Limiter

PostPost by: david.g.chapman » Tue Sep 26, 2017 6:06 pm

Just a quick tale of an incident in my +2 a few weeks ago.

I was about 3 miles out of Beaulieu on an autumn break, and was just about to change up from 3rd to 4th at about 40 mph. Little did I know that the throttle cable had decided to stick partly open while in gear. As soon as I declutched to change up the engine shot up to 6500 rpm in less than a second, and was held there by my sprung-contact rev limiting rotor arm.

If I had not fitted it the revs would have gone up to who knows where, with possible engine failure.

As it happened, I was able to re-engage the clutch with a puff of clutch dust and burning, and was then able to brake the car until the engine stalled at the side of the road. A bit of fiddling about and the throttle cable was freed and there was no damage. Phew!

So I will not be driving without something to limit the revs in future (in the past I have used a standard rotor arm sometimes).

Dave Chapman.
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PostPost by: mbell » Tue Sep 26, 2017 6:47 pm

I am not very trusting of the old rotor arm with rev limiter and they're hard to get these days so I've fitted a Pertronix Electronic limiter for fear of something similar happening.
'73 +2 130/5 RHD, now on the road and very slowly rolling though a "restoration"
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