What is the popping at the top of the RPM band
03-27-2012, 08:36 PM
#11
AudiWorld Super User
Originally Posted by SloopJohnB@mac.com
I've found that using a gasoline that meets Top Tier specifications eliminates the carbon buildup problem.
http://www.toptiergas.com/
03-27-2012, 09:37 PM
#12
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bad example as the FSI engines get carbon buildup no matter what.... which is one reason i suggest WAI injection to EVERYONE that has one of those engines! the easiest way to fix a glaring error by VAG
03-28-2012, 05:13 AM
#13
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Let's undertand the issue.
First, ethanol is not the cleaning agent. Techron is (or similar, although i have foudn few that are truly its equal).
Second, the problem with DI engines has nothing to do with brand of gas. It is that the gas is injected directly (duh) - thus it does not pass over the valve seats and valves, thus cleaning them as a routine part of being sucked into the cylinder.
The problem remains whether you use shell, exxon, some poor mexican's dinner, or moonshine.
G
First, ethanol is not the cleaning agent. Techron is (or similar, although i have foudn few that are truly its equal).
Second, the problem with DI engines has nothing to do with brand of gas. It is that the gas is injected directly (duh) - thus it does not pass over the valve seats and valves, thus cleaning them as a routine part of being sucked into the cylinder.
The problem remains whether you use shell, exxon, some poor mexican's dinner, or moonshine.
G
03-28-2012, 06:16 AM
#15
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Let's undertand the issue.
First, ethanol is not the cleaning agent. Techron is (or similar, although i have foudn few that are truly its equal).
Second, the problem with DI engines has nothing to do with brand of gas. It is that the gas is injected directly (duh) - thus it does not pass over the valve seats and valves, thus cleaning them as a routine part of being sucked into the cylinder.
The problem remains whether you use shell, exxon, some poor mexican's dinner, or moonshine.
G
First, ethanol is not the cleaning agent. Techron is (or similar, although i have foudn few that are truly its equal).
Second, the problem with DI engines has nothing to do with brand of gas. It is that the gas is injected directly (duh) - thus it does not pass over the valve seats and valves, thus cleaning them as a routine part of being sucked into the cylinder.
The problem remains whether you use shell, exxon, some poor mexican's dinner, or moonshine.
G
03-28-2012, 09:40 AM
#17
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that's true, but the thing that changed int he new motors is only the switch from port injection to DI. So we concentrate on the change.
political rant alert.....you may tune out now.....
Remember all these things when you consider whether all of our ever tightening emissions regulations have a net benefit. Our politicians (few of whom are engineers) and the environmental lobbyists (who seem to be rather extremists and technically unsophisticated) continue to push for technology that makes very minor impacts on our air quality. Cars have been >>>90% clean for ages (putting aside C02, which cant be eliminated from an oxidation reaction). So many of the costly, hard-to-fix new systems on our vehicles are making small reductions in the remaining few percent. Diminishing returns, with accelerating costs and complexity. bear this in mind when you vote, when you reply to surveys, etc. We all want a clean environment, but an 80/20 rule might have us looking first at coal fired electrical plants (you know, the ones powering hybrid vehicles - yea, those!)
/ rant
G
political rant alert.....you may tune out now.....
Remember all these things when you consider whether all of our ever tightening emissions regulations have a net benefit. Our politicians (few of whom are engineers) and the environmental lobbyists (who seem to be rather extremists and technically unsophisticated) continue to push for technology that makes very minor impacts on our air quality. Cars have been >>>90% clean for ages (putting aside C02, which cant be eliminated from an oxidation reaction). So many of the costly, hard-to-fix new systems on our vehicles are making small reductions in the remaining few percent. Diminishing returns, with accelerating costs and complexity. bear this in mind when you vote, when you reply to surveys, etc. We all want a clean environment, but an 80/20 rule might have us looking first at coal fired electrical plants (you know, the ones powering hybrid vehicles - yea, those!)
/ rant
G
03-28-2012, 11:30 AM
#18
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where emissions should be focusing IS the C02. they need to start implimenting carbon scrubbers after the cat that can further clean the air. rather then worring about parts that like you said are already above 90% efficent
03-28-2012, 12:54 PM
#19
That popping sound is just your exhaust. Probably has to do with the mufflers/ resonators.
Sounds cool if you ask me! I don't think there is an issue as the engine sounds healthy.
Jason
Sounds cool if you ask me! I don't think there is an issue as the engine sounds healthy.
Jason
03-28-2012, 01:05 PM
#20
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