Hitting the Rev limiter?

[old-git]

Originally Posted by HDi fun

Also, as mentioned elsewhere in this thread, the rev limiter can cut in at inopportune moments!

You are of course at liberty to sort your gear change before commiting to a manoeuvre. THe natural rev limiter will cut in at the wrong time as well. And that one wrecks the engine.

That is why it is fitted, so that faulty natural rev limiters don't damage the engine

In 38 years of driving, some of then as a 'boy racer', I have never broken an engine by over-revving. Indeed, there have been a few occasions where a mechanical rev limiter would have resulted in more damage than just a broken engine.

I contend that if you are an enthusiast, build your own engines so know their limitations and trust your experience and skill, mechanical rev limiters are an unecessary restriction. But for the majority, they may save the engine from being damaged. However, as the occasional over-revving won't do any harm (the rev limiter is set quite a way from the failure RPM) you would have to be pretty leaden footed to do any real damage.

[Gangsta]

i have once in a mondeo to demonstrate it to my wife (we were having a discussion about it), and a few times at the pod.

[HDi fun]

Manufacturers do set the limits low to offset warranty claims - who can blame 'em. If you're blueprinting an engine and balancing the whole assembly the agreed OG, you can be a lot braver.

The only thing that they can't mitigate against is a downchange in a standard manual car, say to 2nd at 105mph. But you'd have to use some force to get the lever in against the syncromesh. Quadruple declutching anyone?

[old-git]

Originally Posted by HDi fun

The only thing that they can't mitigate against is a downchange in a standard manual car, say to 2nd at 105mph. But you'd have to use some force to get the lever in against the syncromesh. Quadruple declutching anyone?

Fortunately, never tried that

[HDi fun]

Me neither, but some months ago somebody posted on here that this was a sure fire way to defeat the rev limiter. Question is: Why?

It won't do any good because once over the limit the sparks and/or fuel are cut virtually dead.

[waynne]

On the Astra at least, once you are past the rev limiter it no longer kicks in. It is active while revs are below the limit set.

But as you say - why do this?

Quadrouple declutching FYI :- Dip clutch raise clutch dip clutch neutral raise clutch dip clutch move into gear raise clutch, engine goes supernova, dip clutch and then raise clutch Down changes are a reverse of this .