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Old 07-08-2007, 10:47 PM   #1
flycaster
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Default Meth Injection & Hot temps

I run a 50/50 H20 and Meth mix, and for the second summer I'm having occasional issues with boiling line fluid causing the pressure pump to cavitate. It happens when it is is ubber hot outside (105+) and the underhood temps skyrocket.

The only reason I'm posting this is as a heads-up to anyone running straight meth, which has an even lower boiling point than my mix. If you don't have a failsafe and/or a primer pump to keep the feeder line under pressure, be careful when it is really hot outside - your pump may not be able to get any juice to the injector.

Note - this problem increases with altitude. Beware
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Old 07-08-2007, 11:12 PM   #2
shortys64
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This sounds like an awesome problem....I have the SMC kit, do I have to worry about this? I am running a 50/50 mix. Thanks for the heads up.
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Old 07-09-2007, 12:07 AM   #3
flycaster
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I can't answer that - I'd run it by your installer.

I have an Aquamist system that utilizes the I/C spray container in the trunk and the original lines to pull liquid to the pump and injector system located in the engine compartment. It's boiling in the line before it gets to the injector pump - after that it is pressurized so there is no problem. My fix will be to relay the I/C pump (located in the tank) to fire with the Aquamist pump - that will pressurize the feeder line all the way to the Aquamist pump and raise the boiling point.
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Old 07-09-2007, 09:24 AM   #4
ptirmal
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So it's boiling in the trunk? Why not just install the AM pump in the trunk and run new hose to the IC? Also if it's getting hot in the line leading to the AM pump under the before it gets to the hood why is underhood temp important?
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Old 07-09-2007, 11:35 AM   #5
flycaster
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Quote:
Originally Posted by ptirmal View Post
So it's boiling in the trunk?
No, no, no - it's boiling in the feeder line portion inside the engine compartment leading up the main AM pressure pump. I can see it bubbling.

Here's my point: at my elevation (@ 4,000' asl), a 50/50 mix will boil at approx. 172f, and 100% meth will boil at only 140f. With hot outside temps, a hot engine, and no or low air, it's gonna boil unless it's under pressure.

Last edited by flycaster; 07-09-2007 at 01:42 PM.
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Old 07-09-2007, 01:39 PM   #6
jblaine
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Old 07-09-2007, 01:50 PM   #7
flycaster
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^^We tried that right off the bat. If the car sits in a hot parking lot long enough with no air flow it isn't enough - line pressure is the best solution.
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Old 08-13-2007, 09:58 PM   #8
defrancb
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Go to the Snow Performance website, they have an upgraded solenoid that may help when using the stock trunk mounted resvoir for water/ methanol.
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