Comments on Methanol/water injectors for Mopars

Discussion in 'Fuel and Air Systems' started by burrpenick, Oct 23, 2018.

  1. burrpenick

    burrpenick '72 Duster

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    I'm trying to decide if I want to install headers on my 360-many folks just say NO, but the extra HP would be nice too. But, I recently saw one of these kits at a show and the owner seemed to love it. Anyone have some Mopar experience- maybe one of these would make me feel like I've not left a lot on the table?
     
  2. Mattax

    Mattax Just the facts, ma'am FABO Gold Member

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    It's for detonation control under high compression, high load situations. You adding a supercharger? :lol:

    Used extensively for military aircraft during and after WW2 for addressing low octane fuel or, for very high load situations and increasing supercharger boost for brief periods during combat. That's the same types of uses it can be appropriate for with automobiles.
     
    • Agree Agree x 1
    • burrpenick

      burrpenick '72 Duster

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      Agreed, but many users suggest more HP too. Of course it doesnt appear to be a cheap HP gain like HEADERS.
       
    • mario03srt

      mario03srt FABO Gold Member FABO Gold Member

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      Burr,

      As you may know those are 2 completely different processes. The headers will improve air flow and allow for more fuel = power. Meth injection is a way to increase octane and therefore raise the ceiling for detonation. So if you have a high compression motor 10.5 on up, or running boost on pump gas the Meth which is about 108 octane will allow more safe power under elevated engine tuning, timing/boost/compression/cyl pressure w/o engine damage. I'm guessing that your 360 is a stock engine, is it a 5.9 magnum or LA 360? LA 360's are a very soft compression engine like 8 to 1 whereas the Magnum is about 9.6 to 1. The Magnum 5.9 would show some improvement in power if you ran a water/meth inj system due to the cooling of the air charge which increases air density and with efi it will compensate which will provide max timing and adj the fuel trims out as you are now fueling the car secondarily and still run fine. If it is a stock LA 360 don't bother really. It's just going to gurgle! On a lightly modded Dodge SRT-4 Turbo I ran Water/Meth on 18 psi of boost, stock was 15, and it made 15 horses, and 40 ft lbs over stock over the added 3 psi of boost just due to cooling. Be advised also that once the modded engine is set to run Water/Meth if it should quit and you do not have any fail-safes you will rattle the motor or melt a piston. On a stock setup there is no issue.

      FYI,

      Marion
       
    • burrpenick

      burrpenick '72 Duster

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      thanks for the true life experiences you have with the injection; my engine is the LA, not totally stock but not wild. I probably wont go there- $500 is more than I want to invest for maybe any increase in power.