Is revving to the limiter harmfull?

[KnockOff]

As title states I hear people do it all the time but always thought that it was bad. What's the truth about this?

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[TyphoonFiST]

As title states I hear people do it all the time but always thought that it was bad. What's the truth about this?

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The good old Italian Tune up...as long as you don't detonate when doing it...I see no harm no foul as long as the engine is in good running condition also.They have the Red line set to where the engineers felt comfortable it wouldn't grenade itself.....there probably is more Room in there to raise it to squeeze some extra horseys but why risk it?

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[KnockOff]

Just revving in neutral I mean. Should have clarified that. Like to hear exhaust pops at a stand still.

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[TyphoonFiST]

Just revving in neutral I mean. Should have clarified that. Like to hear exhaust pops at a stand still.

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Do you have that option installed in a tune for your car?

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[KnockOff]

Just ots stg 2 tune.

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[TyphoonFiST]

Just ots stg 2 tune.

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Did you get the snap crackle pop option?

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[felopr]

not really to a certain degree imo
i know this sounds silly but the rev limiter stops the engine from over-revving (no shit lol).
over revving is really bad for the rotation assembly, aka" crack, valve, camshaft etc" if not taken the measurement to support that extra rev of the engine.
The stock engine rev line is set to 6300ish rpm and rev limiter is set to 6500rpm, that means ford "guarantees" that the engine can rev that high without engine damage.
if you rev it past that, you are at your own risk that the engine could take damage, for example valve float, or hit a valve into the piston.

TLDR: hitting the stock rev limiter from time to time while doing a pull, not really

 

[KnockOff]

No pop option.
Just hearing ppl do it all the time. I'd like to a couple times to hear my tbe once its on just wondering if it woukd be safe.

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[TyphoonFiST]

No pop option.
Just hearing ppl do it all the time. I'd like to a couple times to hear my tbe once its on just wondering if it woukd be safe.

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There are tuners who can put that in a tune for you...mine does it upon decel most of the time and I like it....sounds ricey!

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[KnockOff]

Lol. Ricey.

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[M-Sport fan]

I've always heard/been told that free-revving an engine with no load on it (standing still in neutral) IS harmful, even up to the factory set rev limiter, and even when fully warmed up.

Whether or not this is the truth on modern rotating assemblies/valve trains lubricated by today's very high quality engine oils, is anyone's guess.

Any power train engineers/engine builders on here to give a definitive answer?

 

[KnockOff]

I've always heard/been told that free-revving an engine with no load on it (standing still in neutral) IS harmful, even up to the factory set rev limiter, and even when fully warmed up.

Whether or not this is the truth on modern rotating assemblies/valve trains lubricated by today's very high quality engine oils, is anyone's guess.

Any power train engineers/engine builders on here to give a definitive answer?

That's exactly what I have always been told but questioned weather that applies to newer engines.

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[Quisp]

If you get valve float or other valvetrain harmonics and valve kisses a piston, all bets are off. The power with a stock turbo signs off at 5500 so what's the pernt.

 

[felopr]

If you get valve float or other valvetrain harmonics and valve kisses a piston, all bets are off. The power with a stock turbo signs off at 5500 so what's the pernt.

hybrids/big turbo dont die at 5500, by dyno graphs posted before, they can be run to 7k before they run out of breath...

 

[apex1]

It is fairly common for a NASCAR driver to miss a shift and damage his engine. What does that suggest? Don't do it.

 

[felopr]

It is fairly common for a NASCAR driver to miss a shift and damage his engine. What does that suggest? Don't do it.

they also dont have rev limiters, that is why

 

[TyphoonFiST]

It is fairly common for a NASCAR driver to miss a shift and damage his engine. What does that suggest? Don't do it.

They redline at 9k and are designed to run high RPM for short periods of time. Our engine are designed medium RPM redline and are built with longevity in mind and fuel economy and a bunch of other earth friendly bark eater ideas.

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[Quisp]

hybrids/big turbo dont die at 5500, by dyno graphs posted before, they can be run to 7k before they run out of breath...

Hence my statement " stock turbo".

 

[Sprayed150]

There are tuners who can put that in a tune for you...mine does it upon decel most of the time and I like it....sounds ricey!

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shhhhhhh

the pops make me smile, it makes me miss my 08 gt that would pop fireballs coming down from high rpm or on wot shifts with the ignition cut setup on my nitrous tune

 

[M-Sport fan]

Hence my statement " stock turbo".

Even an upgraded turbo system would have me wary of screaming the factory bottom end, and maybe even valve train out to 7K+ revs every shift, whether or not many on here swear on their mother's lives it will not hurt anything, and do this on a minute to minute basis when daily driving their FiST.

IF I personally were to be having to shift consistently @ 6800+ revs to make power, it is time for a fully built, forged, balanced and blueprinted, knife-edged crank build.