High RPM to Remove Carbon

[joekingcorvette]

I really do believe the old Italian tune ups are good for most vehicles. Engines are made to be run hard once in a while but you need to know the vehicles limitations. You can see the dirty exhaust coming out of some vehicles when they are floored or quickly passing another vehicle. All that emissions and smoke is probably cleaning something out in the engine and exhaust system. How much you hot rod your vehicle is up to you.

 

[Patman]

I really do believe the old Italian tune ups are good for most vehicles. Engines are made to be run hard once in a while but you need to know the vehicles limitations. You can see the dirty exhaust coming out of some vehicles when they are floored or quickly passing another vehicle. All that emissions and smoke is probably cleaning something out in the engine and exhaust system. How much you hot rod your vehicle is up to you.

Italian tune ups are good for the soul too, I know that I get a big smile on my face after some full throttle blasts in my Vette I don’t get that same feeling when I go full throttle in the Civic, which is why I don’t bother doing it very often

 

[dbias]

When DI first came out VW recommended 20min @ 3k rpm to keep deposits in check. I had an Audi 3.2 and did this once or twice a year on the ride home. I got rid of the car at 148k miles with zero carbon issues

Here is the VW model paper for that.

https://patents.google.com/patent/US6866031B2/en

 

[billt460]

No it doesn’t especially with direct injection.
That’s because the correct air/fuel ratio is not optimal for emissions.
Fact is that the fuel/air ratio needs to be all over the place under different operating conditions, in order to keep emissions, LSPI, knock and a host of other parameters in check.

Short trips and cold weather still can result in carbon buildup.

Technically you may be right. But regardless, it's nothing compared to what once was. There are literally millions of modern, fuel injected vehicles out there, of all makes and engine sizes, (direct injected or otherwise), that run fine for well into 6 figures of mileage, without the owners revving them constantly.

I'm not saying there is anything "wrong" with doing this. It's your car to do whatever you would like. Just don't tell me it's, "necessary". Because there are too many cars and trucks out there that have proven otherwise.

 

[TiGeo]

Technically you may be right. But regardless, it's nothing compared to what once was. There are literally millions of modern, fuel injected vehicles out there, of all makes and engine sizes, (direct injected or otherwise), that run fine for well into 6 figures of mileage, without the owners revving them constantly.

I'm not saying there is anything "wrong" with doing this. It's your car to do whatever you would like. Just don't tell me it's, "necessary". Because there are too many cars and trucks out there that have proven otherwise.

Same goes for running 0W20

 

[billt460]

My 1991 5.0 Ford pickup rarely sees anything much over 2,000 RPM. And it only sees that passing at highway speeds when it drops out of overdrive. Mostly driving around town it doesn't get above 1,500 or so.

It has a 34 year old throttle body "EFI" fuel injection system. One of the earliest. If and when I do "get on it", nothing comes out of the tailpipe that is visible. And it's smooth as can be.

About all I accomplish by stomping on it, is worse fuel mileage. The plugs will easily go 75,000 miles. Even though the manual recommends every 30,000 miles.

 

[KrisZ]

Technically you may be right. But regardless, it's nothing compared to what once was. There are literally millions of modern, fuel injected vehicles out there, of all makes and engine sizes, (direct injected or otherwise), that run fine for well into 6 figures of mileage, without the owners revving them constantly.

I'm not saying there is anything "wrong" with doing this. It's your car to do whatever you would like. Just don't tell me it's, "necessary". Because there are too many cars and trucks out there that have proven otherwise.

Agreed.
I’m definitely not in the camp of this being necessary. More like it’s not a bad idea under some circumstances.

 

[svenson]

No it doesn’t especially with direct injection.
That’s because the correct air/fuel ratio is not optimal for emissions.
Fact is that the fuel/air ratio needs to be all over the place under different operating conditions, in order to keep emissions, LSPI, knock and a host of other parameters in check.

Short trips and cold weather still can result in carbon buildup.

these 2 are causing a lot of problems

 

[Skippy722]

According to their own words, it has “2x the cleaning detergents”… compared to what though? Their 87? A competitor’s premium? What’s their benchmark for comparison? Hard to tell with marketing speak like that.

I will agree though that some brands’ premium does have more detergents though, I’m just pointing out that this snippet from Circle K proves nothing.

Probably 2x the epa minimum, given that’s what they mention in the first drop down menu. Shell also says basically the same thing.

Never have done it "Scientifically" like the method described here, but i could assure that you can always feel the difference after you drive a car hard on the autobahn which was previously used mostly on short trips or around town.

4.000 RPM is my prefered cruising speed here with my Winter beater VW golf MK III. It´s a perfect smooth ride with 100 MPH / 160 KMH in 5. gear. You can drive for hours this way, the engine will last forever.

My Honda S2000 is a different story, to my knowledge it is one of the few engines wich you can destroy on the autobahn, because the engine cant stay the insane piston speed at 9.000 RPM for a longer period of time. Read: 30 Seconds ~ 1 Minute to my best knowledge.
I read about two cases in the german forum where owners blow up the engine on the Autobahn because they want to know "how fast this car can go"
They know everything about computers, but dont know the meaning of "Piston Speed" and what happens inside an engine....

When we drove to Arkansas I was kind of… okay I definitely was treating the van like it owed me money and I’m a loan shark with a barb wire bat. The next day my wife was driving it and she said “what did you do to my van, I can’t feel the engine running!” I told her she babies it and short trips it, the worst combo so I just blew out years of crud. She told me to be nice to her van….

 

[gfh77665]

Short trips and cold weather still can result in carbon buildup.

I have often wondered if living in a warm, southern climate without any cold is quantifiably better for a vehicle and engine than one which operates in areas with a cold climate.

 

[billt460]

I have often wondered if living in a warm, southern climate without any cold is quantifiably better for a vehicle and engine than one which operates in areas with a cold climate.

After living 38 years in the Midwest, and 34 years out here, I can all but guarantee it is much BETTER living in a warm / dry / hot climate, as far as vehicle longevity. I had far more problems with my vehicles living in the Midwest.

Not to mention what driving on wet / snow / and salted roads does to them.

 

[TomYoung]

To OP,
Nope. According to a GM (Northstar) engineer, that's NOT what you are trying to accomplish with the WOT procedure.
The act of getting the engine to high rpm for a short period is fine, if the engine will take it. BUT what you are really trying to do is free up the ring pack, especially the oil rings for those of us wishing to reduce oil consumption.
In the case of the WOT, it's the high vacuum of DE-celeration that works the magic on the rings. The high vacuum decel causes the rings to flutter in the piston grooves, breaking up carbon deposits therein.
I had a Northstar with "some" oil consumption, not really bad, like 1/2 qt in 5000 miles. It was determined then (2000 or so) that the VII's were not up to handling the high heat. They also called for regular dino oil mostly back then.

The procedure I used was switching to synthetic Mobil1, and using the WOT. I can only imagine that using a product like VRP along with the WOT might result in a much better outcome. That fixed the problem and resulted in 0 consumption!

Ultimately, it really doesn't matter much what the top deck of your pistons look like, as long as there is no interference with valve operation, etc. It's the rings that keep oil in the pan and compression in the combustion chamber.

Did the Northstar engineer work on any good engines?

 

[kebabaluba]

Instead of driving like a maniac, i`d vouch for water decarbonization method. Steam is powerfull stuff.

 

[billt460]

I would add that this topic doesn't apply to modern Diesel engines. Modern Diesels are all but destroying themselves, with all of the emissions garbage they have been saddled with by the EPA.

They've become a complicated, expensive, filthy nightmare. This regardless of how they're driven. Exhaust regurgitation has them so clogged with carbon deposits, that many of them have to have thousands of dollars of work performed on them, well before they make anywhere close to 100,000 miles.

I love Diesels, but I would never own a modern one. There is just too much expensive, complicated plumbing on them to go wrong. And the whole concept behind buying a Diesel used to be simplicity, reliability, longevity, and fuel economy.

Today none of that offsets the expensive maintenance and repairs they require. Then there is the added cost of the DEF, along with yet another complicated, expensive plumbing system to manage it.

Not to mention it's very corrosive nature. And none of that can be cured by, "standing on it". All of that extra soot has to go somewhere, if it's not coming out of the tailpipe. And the more Diesel you burn, The more of it your engine will generate.

 

[JohnnyG]

Did the Northstar engineer work on any good engines?

A lot of them are still on the road.

 

[frankbee3]

Italian tune ups are good for the soul too, I know that I get a big smile on my face after some full throttle blasts in my Vette I don’t get that same feeling when I go full throttle in the Civic, which is why I don’t bother doing it very often

Italian tuneup for the soul. Yes, some cars cry during the IT, others give a nice growl of satisfaction. If I had the Corvette, the Italian tune up would be compulsory maintenance.

My cars seem to complain during the Italian tune up..

 

[Patman]

Italian tuneup for the soul. Yes, some cars cry during the IT, others give a nice growl of satisfaction. If I had the Corvette, the Italian tune up would be compulsory maintenance.

My cars seem to complain during the Italian tune up..

The exhaust note from the LT1 engine in my Corvette has a nice “exotic” sound to it at full throttle/high rpm that is really music to my ears

 

[Mechanician]

The exhaust note from the LT1 engine in my Corvette has a nice “exotic” sound to it at full throttle/high rpm that is really music to my ears

The sound of a V8 is so nice, compared to the fart sound of a four cylinder.
It's hard to believe that the kids keep "enhancing" the sound of their four cylinder engines.
Not impressive in the least.

 

[billt460]

The sound of a V8 is so nice, compared to the fart sound of a four cylinder.
It's hard to believe that the kids keep "enhancing" the sound of their four cylinder engines.
Not impressive in the least.

One of the kids down the block from me has one of those big chrome "cans" on the back of his Honda whatever. It sounds like crap, and looks like the stack on one of those wood fired smokers.

 

[TiGeo]

The sound of a V8 is so nice, compared to the fart sound of a four cylinder.
It's hard to believe that the kids keep "enhancing" the sound of their four cylinder engines.
Not impressive in the least.

Get off my lawn much? Nothing like hurting someone's feelings in their V8 (that does sound good BTW) in my 1.8L @~400hp with "enhanced" exhaust...I can post drag and track videos until the cows come home...laughing...