Warm air intake and water injection?

[Dust]

My current car has a water injection system, and is turbo. I have been thinking about trying to get a filter onto the turbo (right behind the radiator) for warm air, and then using the water injection to cool the air off when I get into boost. Does anyone see a problem with this? I don't know about the filter getting mounted yet, the turbo inlet is 1.875 inches.

[Dust]

I found a filter, and it is tapped for a nozzle. The filter will go behind the grill with a shield. it will mount to the turbo, and the nozzle will pretty much aim at the turbo. it's set to start at 7 psi. The only thing I don't know what to do with is the IAT sensor. it is mounted in the airbox, alot of good for a turbo car, but that is where it is. Do you think I should move it closer to the filter?

[fjasper]

I think it depends on what the ECU does with the temperature reading. If it uses a factor to correct temperature for boost, then after the water injection and before the turbo. If it uses straight temperature, it seems like the most consistent readings would come from having the IAT (Intake Air Temp) located at the throttle body.

I don't have experience with water injection or aftermarket ECUs, so I'm just guessing here.

[koji_kabuto]

if you have intercooler, i dont think you will get warm air intake, i have the intake right at the radiator fan. well a fairly large intercooler keep my ait low. at a stop idling w fan running, i never see ait shoot past 60c. ait drops as the car picks up speed. i agree with mr jasper. keep the ait as close as you can to the tb so the ecu reads the right value

[Phantom]

I usually place the IAT sensor in the filter this gives the lowest temp of incoming air and allows to have more timing and prevents the IAT a bit from heat soak. With a turbo since the difference in temp is more between filter and TB you might want to place it after the turbo so the engine will not ask for to much timing. Depending on the way the car calculates fuel it might use the IAT to calculate air density and torque.

I would not add a warm air intake to the car till you know what temps you are running currently. How do you have the water injection running?

[Daox]

IMO it doens't make sense to warm the air just to cool it later...

However, I would suggest using water injection to negate the need for fuel enrichment.

[Christ]

Water injection has a dual benefit, though. Water allows the user to make more power with the same fuel, because extracting enough heat from the fuel burning under pressure turns the vaporous water into steam, which expands to, what?, 1600 times its original volume?

[Christ]

Ok, not the same fuel, but only slightly more. The extra heat to turn the water to stream has to come from somewhere.

And he'd only be using the water on boost... I.e. when not exactly trying for max economy, I'd guess.

[Christ]

Wow... talk about a long project. This thread had one post OVER A YEAR AGO! And the original poster even brought it back with an update...

[ConnClark]

Originally Posted by Dust

I found a filter, and it is tapped for a nozzle. The filter will go behind the grill with a shield. it will mount to the turbo, and the nozzle will pretty much aim at the turbo. it's set to start at 7 psi. The only thing I don't know what to do with is the IAT sensor. it is mounted in the airbox, alot of good for a turbo car, but that is where it is. Do you think I should move it closer to the filter?

water injection before the turbo will cause erosion of the impeller. Think about the bits of metal will do to your engine. I'd also suggest you read this before considering a warm air intake on a turbo'd vehicle Compressor Efficiency and More