+1 Take into account forced induction gasoline engines like diesels do not create a vacuum and use external pumps kind of eliminates this thing right off the hop.
A solution to Direct Injection carbon issues?
- Thread starter Graham Piccinini
- Start date
You're not constantly boosting, and a checkvalve would be enough to keep boost from going into the can
With the movement of the valves and the heat I think the appropriate chemical would do it. It would probably take a while but that's what you'd want, slow removal as the build-up dissolves, not big chunks coming off.
Look at oven cleaner, try and scrap the burnt on gunk off and it's not happening, soak it with oven cleaner and it wipes off. TCW-3, if allowed to soak, will let you wipe the carbon build-up off a piston with a rag.
Problem is the condensation of mist in the intake cooler. It may not arrive to engine intake.
Methanol/water injection is sometimes used by tuners who are trying to add more power to their turbocharged engines. The injector is mounted at the intake. BMW even provided this system on the F8x M4 GTS.
New BMW M water injection system
The BMW M4 GTS is the first series-produced street vehicle to utilise an innovative and pioneering water injection system that further optimises the performance and consumption of the turbocharged six-cylinder inline engine, even at full performance capacity.
www.bmw-m.com
Here's an example of an aftermarket solution for the BMW N55 engine.
N55 BMW Water Injection Kit
Water/Methanol/Alcohol injection commonly referred to as WMI allow you to make tremendous amounts of power in your N54 BMW on pump gas. The effect is similar to running 100 octane race gas or E85 fuel all the time with the additional cooling benefits allowing for even more power.
burgertuning.com
Water Meth injection doesn't do anything for intake valve buildup. Its magic happens in the combustion chamber.Methanol/water injection is sometimes used by tuners who are trying to add more power to their turbocharged engines. The injector is mounted at the intake. BMW even provided this system on the F8x M4 GTS.
New BMW M water injection system
The BMW M4 GTS is the first series-produced street vehicle to utilise an innovative and pioneering water injection system that further optimises the performance and consumption of the turbocharged six-cylinder inline engine, even at full performance capacity.www.bmw-m.com
Here's an example of an aftermarket solution for the BMW N55 engine.
N55 BMW Water Injection Kit
Water/Methanol/Alcohol injection commonly referred to as WMI allow you to make tremendous amounts of power in your N54 BMW on pump gas. The effect is similar to running 100 octane race gas or E85 fuel all the time with the additional cooling benefits allowing for even more power.
I've seen photos of valve steams which have been cleaned up with water/meth injection. *shrug*.
Example
Why You Should Consider Water-Methanol Injection For Your Engine
We take a look at all of the benefits of a water-methanol injection system from Snow Performance on different applications.
www.lsxmag.com
VW/Audi is solving this problem by injecting a small amount of fuel into the intake ports to "wash" the intake valves. The vast majority of the fuel is direct injected.
Have they brought that technology to the US? Last I read (2 yrs ago) was that they hadn't because it would make their vehicles less competitive cost wise for the economy segment.
I used this product recently and it seems to have improved things in my 2014 Focus With GDI.
I wasn't feeling any issues prior to using this product but I felt that I might as well do some IV cleaning for the first time as my Focus approached 60K. The car did idle smoother and seemed to run better afterwards. When I purchased this STP product last year it was $29.99 at AZ 'on sale' from $39.99....now it's $29.99 everyday price.
I wasn't feeling any issues prior to using this product but I felt that I might as well do some IV cleaning for the first time as my Focus approached 60K. The car did idle smoother and seemed to run better afterwards. When I purchased this STP product last year it was $29.99 at AZ 'on sale' from $39.99....now it's $29.99 everyday price.
Aren't we told that oil in the combustion chamber is what supposedly causes LSPI ?
If done right, the main advantage is supposed to be in performance and not just cleaning the intake valves.
Toyota has had it for a while, and there seem to be a special cleaning mode call D-4S. That's already gone in to a variety of luxury cars and the Tacoma pickup.
Toyota Advances D4S With Self-Cleaning Feature on Tacoma
Drivers may hear the self-cleaning taking place during a hot idle, and the process could last from 10 seconds to as long as 10 minutes, depending on driving patterns and the amount of build-up on the injectors.
www.wardsauto.com
The FR-S/BRZ/86 supposedly has both direct and port injectors.
Not necessarily oil, but oil deposits and/or components in the oil that may spontaneously explode.
Low Speed Pre-Ignition (LSPI) | Chevron Oronite (Global)
LSPI is an abnormal combustion event in which the fuel-air mixture ignites before intended, causing excessive pressures inside the engine's cylinders.
www.oronite.com
Zee09
$200 Site Donor 2023
Yes.... It wasn't a constant 3X idle but very close....maybe a 300 to 500 rpm variation in each direction at times.
You mean Motor Oil that gets caked on the valves and intake ports? Yes. But something like Marvel Mystery Oil (consisting of naphthalene and all other "cleaning" goodies) or any other Fuel Additive will keep the intake valves clean by breaking down that carbon on the valves and acting like "port-injection". With constant application that is.
It's much more than just "a small amount of fuel". Actually it's a significant amount
as the engine is running MPI only at lower loads at low to mid revs and that's where
very most daily driving happens. Blue is MPI, green and red are FSI modes.
source: Audi SSP606 (EA888 3G)
4WD
$50 site donor 2024
other builders have been doing the DI/PI thing for a while now
No. LSPI is caused by liquid oil inside the combustion chamber. MMO is not going to do anything and frankly I wish MMO was a banned topic. People attribute all sorts of things to MMO when it does nothing.
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