Water injection nozzle before or after IAT
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
Water injection nozzle before or after IAT
I want to get an accurate picture of IAT but am worried there will be issue of water getting on an open element IAT. Should I put IAT before or after injection nozzles. Thanks.
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T3Bunny
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Re: Water injection nozzle before or after IAT
Put the water injection nozzle before the IAT. I try to have it 6-8 inches before too so it gets a better picture of the temp drop introduced by the water injection. I have not seen an increase in IAT failures on any of the water injected cars I have owned or played with. If your still concerned, toss another IAT into your glovebox. Cheap insurance it won't fail on you!
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Minami Kotaro
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Re: Water injection nozzle before or after IAT
My water injector is before the sensor. I went through two open-element IATs in just a few months after I installed my water injection. I switched to a solid-element one and have had no further failures.
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Mike_Robert
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Re: Water injection nozzle before or after IAT
What was the failure mode of the open-element sensors? Hopefully not pieces falling out of them!Minami Kotaro wrote:My water injector is before the sensor. I went through two open-element IATs in just a few months after I installed my water injection. I switched to a solid-element one and have had no further failures.
-Mike
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T3Bunny
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Re: Water injection nozzle before or after IAT
I think one of those aircooled VW engines could vibrate ANYTHING apart....Mike_Robert wrote:What was the failure mode of the open-element sensors? Hopefully not pieces falling out of them!
-Mike
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Minami Kotaro
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Re: Water injection nozzle before or after IAT
They just quit working. All of a sudden, they'd only read -40F. Yeah, I suppose it could have been vibration but the failures happened too quickly after installing my water injection for it to be unrelated.Mike_Robert wrote:Minami Kotaro wrote:What was the failure mode of the open-element sensors? Hopefully not pieces falling out of them!
-Mike
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Mike_Robert
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Re: Water injection nozzle before or after IAT
Sounds like a fracture of the exposed wire leading to the thermistor bead leading to an open and resultant railed low. Do you still have any of the failed sensors? I'm curious as to whether the bead came out - I have a project in build right now that will be heavily dependent on water injection except it will probably not be at all tolerant of solids in the intake. The rotaries aren't known for tolerating foreign object debris. Thanks for the feedback!
-Mike
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efahl
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Re: Water injection nozzle before or after IAT
Hi Mike,Mike_Robert wrote:What was the failure mode of the open-element sensors? Hopefully not pieces falling out of them!
Bill Shurvinton's first failure was exactly that, the thermistor bead vibrated off the wires and went through the motor. Good thing rotaries are tough, eh?
Eric