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08-10-2021, 06:25 PM | #1 |
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Water/meth injection
I'm looking for some info on a water/meth system for a blown flathead. I've read they can lower detonation by lowering cylinder temperature. I'm currently running 8lbs of boost at 5500 rpms. I'm using 93 octane with Lucas octane booster and have my advance maxed at 18 degrees. I know that humidity lowers octane so I get a little concerned here in New Jersey in the summertime. I'm not looking for horsepower, just a safety net
Thanks Joe |
08-10-2021, 06:29 PM | #2 |
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Re: Water/meth injection
Didn't J.C. Whitney sell setups for this? I seem to remember that. The Luftwaffe liked it as well. I think Oldsmobile also used it on their turbo-charged 215" V8's,
I would think a Google search would be productive. Here's some folks : https://www.fluidotech.it/en/landing...RoCCvEQAvD_BwE. |
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08-10-2021, 06:46 PM | #3 |
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Re: Water/meth injection
Just to be sure you are saying it correctly--higher humidity reduces the octane requirement, not the octane. The increase in water molecules from high humidity means lower oxygen content and tends to make the air/fuel mixture look richer in the combustion process.
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08-10-2021, 07:05 PM | #4 |
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Re: Water/meth injection
Yes! Thank you! What’s your opinion on this system?
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08-11-2021, 07:20 AM | #5 |
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Re: Water/meth injection
Not sure about the water, but plenty of people could attest to a meth injection perking them up.
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08-11-2021, 07:30 AM | #6 |
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Re: Water/meth injection
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08-11-2021, 07:40 AM | #7 |
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Re: Water/meth injection
I somewhat doubt you have a problem. However, a more simple solution, with less continual attention, might be a boost related ignition retard and/or knock sensor. If you can hear "squeaking" sounds under maximum loads there is a problem.
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08-11-2021, 09:56 PM | #8 |
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Re: Water/meth injection
The water/alcohol injection systems do work and help control detention under boost. Two potential problems with the systems if you run out of fluid (typically summer washer fluid is used) or if the pump fails, you run the risk of damaging your engine. Not sure how much you drive it but a pump gas/av gas or race gas mix is an option too.
The most expensive, but IMHO the best choice, is the MSD BTM (boost timing master). I ran their distributor, coil, and BTM ignition box with great success and zero issues. It comes with a small dial that you mount on or under the dash and allows you to dial 0,1,2,or 3 degrees of timing reduction per pound of boost. The adjustment feature is really nice if you want to switch between race fuel and pump gas and leave static timing and boost pulley ratios alone. You just dial in more timing retard for pump gas. I am not sure if pump E85 is readily available in NJ. I don't have any experience with E85 and a blown flathead but I have used it with great success with a blown sbc. The problem with E85 is that you would need a proper fuel system for it. A larger output fuel pump and the carb/carbs need to be modified for it as well as PTFE fuel line for longevity. Good luck with it, whatever you decide!
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08-11-2021, 10:03 PM | #9 |
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Re: Water/meth injection
Ironically, we just lost a fellow worker to a random drug test...meth
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08-11-2021, 10:36 PM | #10 |
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Re: Water/meth injection
do the math not the meth
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08-11-2021, 10:45 PM | #11 |
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Re: Water/meth injection
[QUOTE=fordor41;2045146]do the math not the meth[/QUOT
True that.
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08-11-2021, 11:06 PM | #12 | |
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Re: Water/meth injection
Quote:
GB
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08-12-2021, 04:31 AM | #13 | |
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Re: Water/meth injection
Quote:
I've looked at the BTM's and it's something I can visit again. I'm running a Mallory Unilite and Mallory coil. I'm pretty sure the MSD BTM is compatible with my setup. We don't have E85 here so that's not an option for me. Do you know anything about the meth system adding cylinder pressure? Thanks Joe |
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08-12-2021, 06:06 AM | #14 |
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Re: Water/meth injection
Dang. It's fallen out of favor with druggies on the east coast, but seems like it's still out there though.
Last edited by Tim Ayers; 08-12-2021 at 07:05 AM. |
08-12-2021, 06:41 AM | #15 | |
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Re: Water/meth injection
Quote:
I was a temporary Oregonian. It was/is still a drug to be reckoned with there, at least in the southern part.
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08-12-2021, 07:08 AM | #16 | |
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Re: Water/meth injection
Quote:
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08-12-2021, 08:25 AM | #17 |
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Re: Water/meth injection
Here is a photo of the factory installed vitameter on my 1951 crosley super sports. It would inject vitane (mixture of water and alcohol and lead) because of the higher 10:1 compression on the quicksilver engines. The vitameter was a add on for other cars but i understand they never worked well. I just run high octane fuel
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08-12-2021, 08:55 AM | #18 |
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Re: Water/meth injection
That's neat to see. Hadn't heard of one before
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