Reving your engine just before shutdown: How bad?

[Sparkman]

Quote:

---

I am sure it kills him that the Turbo timer doesn't WOT right before it shuts the engine down.

---

I was at a family style party last summer and it was getting dark, I was rounding up the kids and I heard the most horrific sound, turns out it was this guy revving his Ford PSD immediately after starting it. I'm not so familiar with these engines that I know where the governor setpoint is, but it sounded like he held it all the way for 3-4 seconds. I was a bit disappointed in myself for not realizing that this guy was an idiot earlier, as I'd known him for years and I had a lot of hints, but that was it, he's now on my "list".

 

[RedDart]

It serves no purpose except to irritate the neighbors and prove how "cool" he is. It sounds like he is getting the reaction he wants. Hmmm...I wonder if a little concrete up the tailpipe would change his start up routine.

 

[Turbodriven]

In a naturally aspirated car it shouldn't cause many problems...bit dumb tho, but in a turbo charge unit its a sure way to shorten the life of your turbo...

My favorite is the early morning hooligan...clicks the motor over and then takes it straight down the road into the top of the rev range

 

[GT11]

I warm my engine up in the morning by bouncing my RPM's on my rev limiter at 5,000 RPM's so I can get heat.

 

[c502cid]

On a timing chain car it stretches the wee out of the chain doing that. It really makes them whip when you kill it while revving it. Very very bad. Not sure if it has the same result on a belt.

 

[ARB1977]

Ive never do it.

 

[cmhj]

Some people's kids!

 

[oldmaninsc]

My father-in-law used to do this do his cars - when he pulled into the garage he would run it around 2K RPMs for about 30 seconds. He said it "cools the engine". Uh, huh! I told him he was just wasting gas and it wasn't helping his engine any. He said he always did it, and his father always did and they got "lots of miles" out of their cars. The car he had at the time was an 84 Ford Crown Vic (former police car) that went about 300K before it died.

 

[Trucku]

Tanks don't count...lol
You can't hurt that engine.
I am sure this kid is doing wonders for his little 4 banger.

 

[Lorenzo]

Quote:

---

IIRC this was done to modified and race engines, to clear the sparkplugs of fouling and to blow out excess fuel. my nieghbor, who ran a short track car would do this also

---

Does a #@$%! can and giant "Type R" sticker count as "modified race engine?"

 

[OriginHacker21]

Most college kids I know start up their car and soar off to the redline without warming up their car. I think car care is something of the past these days. I remember my dad always changed his own oil (in the 80s/90s) and his own work - never went to get our oil done. I remember neighbors doing their own oil too... Now days everyone goes to IffyLube or Wal-Mart to get their oil done. Hmm... Same reason why people race to red lights and get upset because you slown down.

If the most wear comes from engine startup - people who redline their engines after startup have to be doing serious wonders for their engine - especially for the timing chain crowd as c502cid said.

 

[Shannow]

My Dad always gave the car one "blip" before shutdown, and it's a habit my brother and I picked up. Then we all lost it.

It's seriously still better than my workmate's wife. He describes her morning technique as

getinseatbeltonclutchinturnkeypressaccelertorreleaseclutch400RPM

 

[Shannow]

errm that should be 4000rpm

 

[Max_Wander]

sometimes i rev the engine up and cut the ignition with the pedal to the floor so as to draw in some cool air. Whether its good or bad to do, I dont know. Maybe introducing fresh oxygen into the combustion chamber can increase oxidation? When I've overheated my engine (due to coolant leaks) I've driven alternating between gentle acceleration and ignition-off, WOT, coasting so that the air being drawn into the engine can cool the chambers/head off somewhat. I think doing that saved my engine once. Revving when cold is always a bad idea... the oil is at its thickest and the flow is at its poorest.

 

[4esorselrahc]

Seems kind of pointless to me.

 

[JohnBrowning]

He is killing his rings and if it is OHC he might also be starveing the cam journals. The oil is slung off of the rings when accelerated with no load. The oil pump can not keep up with the rapid demand. When he shuts down the oil supply is cut off before the demand for lubrication or cooling has been taken car of.

 

[Trucku]

Quote:

---

errm that should be 4000rpm

---

Just hit reply to your own post. then in location bar dead center it will say "newreply.php" changet the newreply to "editpost" so its "editpost.php" and hit enter. You can then edit any mistakes.

For anyone who does not know.

 

[Trucku]

Oh yeah when this kid turns his car off, it doesn't shut off right away. It goes at least 2 or 3 revolutions. I watch this when he parked right out front. Sputters and shakes then its off..lol

 

[double vanos]

Two years ago, the lad next door started doing the cold engine redline thing with a brand new Neon.

I warned him that such folly would wind up getting his rod bearings. I doubt he even knew what I was talking about.

At 33k miles the engine developed a knock and then finally failed.

Today he is well aware of what rod bearings are as he parted with nearly $2000 to put them back right (along with a crankshaft).

I now notice reduced vigor with the engine when it is cold. It turns out that the youngsters DO learn when a principle is applied in real life.

 

[Max_Wander]

^ LOL ahahah that was too funny... gotta learn the hard way