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6

Variable-length intakes increase the pressure of the air entering the intake manifold thanks to a physical phenomenon called Helmholtz resonance. It's also known as dynamic supercharging since it avoids the use of a mechanical device (compressor/blower) to boost intake air pressure. How the Helmholtz does it increase air pressure? Without getting too ...


5

The oil stuff is more than likely caused from what the intake pulls out of the crank case through the PCV. If you can get a hold of a couple cans of Seafoam, this should take care of the residue about as easy as you can do it without taking the engine apart. Use the rubber hose to the right of the photo to introduce it into your system. As an engine gets ...


5

First of all by "most production motorcycles" I am assuming commuter level motorcycles used in South and South East Asia its not true that all production motorcycles have intakes facing backwards, its more or less a ergonomics based design decision , some motorcycles have intakes facing 90 degrees to the side. Some have them facing towards the back as you ...


5

MAP = Manifold absolute pressure and is a sensor to measure vacuum, the computer calculates the engine air flow based on the vacuum, throttle position, and intake air temperature. The computer also measures the barometric pressure using the MAP sensor before the engine cranks, this lets the computer compensate for altitude, or how dense the air is. Typical ...


5

It sounds as though you did suck up some water and were on the verge of hydrolock, but didn't quite get there. I also doubt you have caused any damage to the engine, in fact, you may have inadvertently helped your engine (though I wouldn't suggest you do this again!!!). The extra sputtering may have been a case of the filter on your CAI getting soaked with ...


5

Specifically a foam filter for a lawn mower needs oiled, but just lightly. A foam filter lacks the ability to stop small particles as compared to a paper filter. The oil is added to make the filter "sticky" to these small particles giving the foam filter better filtering capability. As far as major engine damage, probably not. Worst case scenario the engine ...


4

The length of the intake runners have certain affects on the engine operation. For example, longer intake runners are used to improve the bottom end torque (torque at low RPMs) while shorter intake runners will improve top end power (horsepower at high RPMs). The lengths will vary from engine to engine as well as what the goals of each vehicle the engine ...


3

A quick search appears to indicate that this is a common issue on this particular model of Civic. The bolt does not want to come out all the way because the heat from the engine over time has liberated the plastic female housing that it threads into. To remove it you need to figure out a way to keep the plastic from spinning when the bolt is turned, as per ...


2

Perhaps a forward facing intake would be good for the engine but the disturbance it would create in the air infront of the bike would be quite bad for handling, straight line stability and completely negate the effect of the fairing. On a basic commuter bike, the problems with a forward facing inlet would be compounded by bikes that are ridden in all ...


2

Two things come to mind here: First, cars are a sieve. There are more holes in them than you can shake a stick at. Lizards are very pliable creatures and can fit through any of these small openings if it fits their needs. Second, the lizard may have been in your car since the last time you were in your car. You never know.


1

It looks like that piece is before the carb on that bike. It acts as a resonator, helping to damping out noises from the intake without adding restriction. Plenty of cars have the same thing in the intake. Some cars have a similar device in the exhaust after the muffler. It is often just a short piece of pipe welded into the main exhaust pipe.


1

The P0507 code refers to: A P0507 DTC trouble code may be caused by one or more of the following: A vacuum leak Leaking air intake after the throttle body EGR valve leaking vacuum A faulty positive crankcase ventilation (PCV) valve Damaged/failed/dirty throttle body Failed EVAP system Failed IAC (idle air controller) or faulty IAC circuit Things to ...


1

Since the car started fine after the first try, there should be nothing to worry about. The thing to remember is: different car; different situation. If it continued not to want to start, then you'd have an issue.


1

For this type of intake manifold gasket, if there is absolutely no damage to the rubber it should be good for reuse. You will need to be very careful with it when taking it off of the engine. Make sure you clean it up and put a very light coat of clean oil on it before installation. Do not remove it from the intake manifold to do this, though, as you run the ...



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