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Old 02-17-2014, 12:23 AM   #1
NorseForce
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Rev Limit

Hey guys. I have a question about the rev limiter. I have a 2014 Focus SE 5speed manual. I have read that the engine is limited to 6800 rpm. The other day I was racing a bit at wide open throttle and went to shift in to second gear but suddenly the power to the wheels ceased. Is this what happens when I hit the rev limiter? Thanks for your help, Im kind of a noob.


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Old 02-17-2014, 02:08 AM   #2
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Sounds like the rev limiter is what you experienced, bit of a shock eh?

A "soft" limiter that cuts spark intermittently isn't as much of a shock, but since that dumps unburned fuel into the CAT it isn't the usual type these days. (to prevent damage)
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Old 02-17-2014, 07:07 AM   #3
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Yep thats the stock rev limiter, get a tune and you can have it set as high as 7200 rpm and itll feel like a normal cars revv limiter
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Old 02-17-2014, 12:38 PM   #4
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Generally the revlimiter is hit when trying to race and in first gear.. The engine revs up so fast you do not have time to realize you are about to run out of revs!

you really do not want to do this on purpose much.. But once in awhile is not going to be bad.

True you can have the rev limit moved upward.. though doing so you then take a big risk in damaging your engine. the valvetrain can only move so fast.. that is the point of the rev cutoff. to STOP you from damaging the engine by over revving it.
You can still overrev your engine (and thus damage/destroy it) by downshifting it into over rev situation. though I can't see why anyone would want to do that.

Anyway when the engine cuts out near max RPM that is the rev limiter saving your ass. And your engine.
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Old 02-17-2014, 07:59 PM   #5
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Quote:
Originally Posted by Elizabeth View Post
Generally the revlimiter is hit when trying to race and in first gear.. The engine revs up so fast you do not have time to realize you are about to run out of revs!

you really do not want to do this on purpose much.. But once in awhile is not going to be bad.

True you can have the rev limit moved upward.. though doing so you then take a big risk in damaging your engine. the valvetrain can only move so fast.. that is the point of the rev cutoff. to STOP you from damaging the engine by over revving it.
You can still overrev your engine (and thus damage/destroy it) by downshifting it into over rev situation. though I can't see why anyone would want to do that.

Anyway when the engine cuts out near max RPM that is the rev limiter saving your ass. And your engine.
^This. It's a safety to save the engine additional wear. Don't be worried about having hit it, but don't make it a mission to hit it every time either.
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Old 08-23-2014, 08:36 PM   #6
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I recently acquired a brand new 2014 Focus SE auto through work. What is the Rev Limiter for this car. Mine, while in park, is set to 3500. I am wonder if this is an OEM setting or something that was changed by the Employer before releasing it to me?

Thanks in advance

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Old 08-23-2014, 08:54 PM   #7
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Sounds like you hit the torque management feature. Without turning off traction control, my car will completely kill the throttle (seen in data logs) for 2-3 seconds after a hard 1-2 shift, even if I haven't gotten close to the rev limiter.

Tom and I did 10-12tunes to help alleviate it and its much better but still happens when playing around if I forget to turn off traction control.
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Old 08-24-2014, 02:34 AM   #8
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Nemisus - OEM feature to prevent folks from damaging the engine.

Rev. high with no load is BAD for an engine, they prefer that you don't turn it to scrap by accident or on purpose.

2,500 rpm limit in gear with the brake applied, release brake for "Drag" launch. (Clutch disengaged at a stop with brake applied)
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Old 08-24-2014, 06:25 AM   #9
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Sailor,

Thank you very much for that feedback. Since this new car is a fleet vehicle I just had to ask. Either way it makes perfect sense.

Cheers

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Old 08-24-2014, 09:17 AM   #10
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If you guys wanna race, go to a pro race track place and always wear a helmet. Don't do it in the street!
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