Performance air filters + noise
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Joined: Oct 2006
Posts: 984
From: Issaquah, WA
Rep Power: 61
Yeah I didn't snap anything. And I didn't try accelerating, I was just driving (through a crazy South Carolina rain storm) and all of a sudden it fell on its face. no puddles, so it wasn't like I immediately thought I locked it up, but the second time it did it a few months later (in heavy rain, again) I realized what had definitely caused it.
oh well. live and learn, I was young and relatively new to cars back then. thankfully nothing drastic/expensive happened.
oh well. live and learn, I was young and relatively new to cars back then. thankfully nothing drastic/expensive happened.
I believe the R32 has MAF sensor driven fueling. MAF sensors are technically known as hot wire anemometers. They work using a measurement of air's ability to remove varying amounts of heat with corresponding changes in airflow rate.
They do this by running a set amount of current through a thin wire and measuring the voltage drop across the wire (or setting voltage and measuring current). The measurement indicates the resistance of the wire. The resistance of the wire is dependent the temperature of the wire. This (and the air temperature) tells how much air is flowing across the wire, thus telling the ECU how much air is entering the engine and how much fuel should be injected.
Water is 20 times more effective at removing heat than air, so if there was water in the airstream entering the intake and running over the MAF, the ECU would see it as very, very fast airflow and overfuel the engine, which would make it run poorly as you describe.
Registered User
Joined: Dec 2016
Posts: 19
From: Hampton Roads, VA
Rep Power: 0
As @Mathman85 stated, you likely weren't close to hydrolock, but I think I can tell you why the car ran so poorly.
I believe the R32 has MAF sensor driven fueling. MAF sensors are technically known as hot wire anemometers. They work using a measurement of air's ability to remove varying amounts of heat with corresponding changes in airflow rate.
They do this by running a set amount of current through a thin wire and measuring the voltage drop across the wire (or setting voltage and measuring current). The measurement indicates the resistance of the wire. The resistance of the wire is dependent the temperature of the wire. This (and the air temperature) tells how much air is flowing across the wire, thus telling the ECU how much air is entering the engine and how much fuel should be injected.
Water is 20 times more effective at removing heat than air, so if there was water in the airstream entering the intake and running over the MAF, the ECU would see it as very, very fast airflow and overfuel the engine, which would make it run poorly as you describe.
I believe the R32 has MAF sensor driven fueling. MAF sensors are technically known as hot wire anemometers. They work using a measurement of air's ability to remove varying amounts of heat with corresponding changes in airflow rate.
They do this by running a set amount of current through a thin wire and measuring the voltage drop across the wire (or setting voltage and measuring current). The measurement indicates the resistance of the wire. The resistance of the wire is dependent the temperature of the wire. This (and the air temperature) tells how much air is flowing across the wire, thus telling the ECU how much air is entering the engine and how much fuel should be injected.
Water is 20 times more effective at removing heat than air, so if there was water in the airstream entering the intake and running over the MAF, the ECU would see it as very, very fast airflow and overfuel the engine, which would make it run poorly as you describe.
Very possible, never thought of it that way. Like I said, I was just a baby back then, but I completely understand the theory and math behind what you're talking about, coming from a nuclear power background. Pretty much nothing but thermo- and fluid dynamics.
Sold the car years ago, and just moved it up into the engine bay when I installed a SRI manifold.
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Joined: Sep 2017
Posts: 2,758
From: Boston
Rep Power: 158
I picked up a set of BMC air filters for $188 delivered. The OEM filters get dirty so quick for me. I am replacing it seems like every 5K miles. Mechanic is big on BMC filters for the Aston Martin. Plan to install them in a couple of weeks.