I Want Meth!

Discussion in '1996 - 2004 SN95 Mustang -General/Talk-' started by Nightfire, Dec 26, 2013.


  1. sethahoward

    sethahoward Member

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    Check around and see if you can get straight methanol anywhere around you. I buy it at a local speed shop. Its only $3.xx a gallon and then i mix it down 50/50 with distilled water. I comes out to about $2 a gallon. which is cheaper than the blue bug juice at the gas station.
    #21
  2. Nightfire

    Nightfire Mustang Master

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    Yeah that sounds good. My local speed shop sells everything VP
    #22
  3. sneaky98gt

    sneaky98gt Mustang Master

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    Winters will likely disagree with me, but I've had great results running washer fluid (I mix my own now at 75%/25% water/meth). I have tried and noticed no gain between 75/25, 50/50, or 25/75. But then again, I'm mainly trying to cool it down since I'm non-intercooled, and I'm tuning it safely by not leaning it out any at all. The extra octane from the meth is just an added bonus and not exactly tuned around.

    If you're dead set on using the methanol as a fuel source, you better have all of the safety stuff offered, and the tune better be spot on, and you better be danged sure nothing is going to go wrong with any of that safety stuff.

    +1 on both accounts. LOTS of people around here running AIS with no issues. They definitely have the nicest tank/pump setup (the 3-gallon truck-mount tank).

    Although after reviewing their website, I am a little disappointed to see how much their prices have gone up. 3 years ago, I bought their Stage I trunk mount kit with the dual nozzle up grade for around $350 shipped. Now, that same setup is over $500 + shipping.
    #23
  4. Nightfire

    Nightfire Mustang Master

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    My tuner says that he doesn't alter the fuel tables or meth, only timing. He's seen too many catastrophic failures from a meth error. So if only the timing is changed a bit, is it still dangerous if there is an injection problem?
    #24
  5. sneaky98gt

    sneaky98gt Mustang Master

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    It would depend on how he is controlling that spark. If he is just adding timing to the borderline tables, that's kinda iffy in my opinion. If you have all the safety stuff setup right and all that, you may get away with it just fine. But if something happens to that safety stuff....

    If he adds timing based on the air charge temps, then you'll definitely be just fine.
    #25
  6. Nightfire

    Nightfire Mustang Master

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    What kind of performance gains could I see from advancing the timing only? Is it worth it?
    #26
  7. sneaky98gt

    sneaky98gt Mustang Master

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    The exact answer would obviously depend on the nature of your setup and how aggressive the tune is.

    A halfway decent way to have an idea of the gains is how much you think you could increase the timing. Do you know what your max timing is?

    Most intercooled cars that I've seen run 17-18 degrees of timing max. Warmer ACTs would likely back that off a couple or few degrees depending on how much boost and compression the car is running. My car, on 8-9ish pounds of non-intercooled boost, is able to run 24 degrees of timing with no detonation with the water/meth spraying (I've actually gone up to 26 at the track, but no gain was found as that was likely over maximum brake torque timing; going from 23-24 only showed slight, inconsistent gains). That is on my 'race' tune (slightly more aggressive ramp-in timing, and less timing pulled in the 140-160 ACT range). My street tune is almost identical, except the timing is backed down to around 18 degrees of timing. There is a HUGE, very noticeable difference. I've actually never raced on the street tune, but I'd guess it's an easy 30-40 rwhp and even more torque low in the RPM range.

    Bottom line: if your max timing is in the 18ish degree range and you were able to bump that up to say 23 degrees with water/meth, you should see a nice gain. The gain should be bigger in the summer when the hot ACTs might pull the timing back even further, to maybe 15 or 16 degrees.

    How safely and accurately you'll be able to bump that timing using the ACTs on an intercooled car, I honestly don't know, I don't have direct experience with that. The idea is to add in a lot of timing when the water/meth brings the temperatures way down. On my non-intercooled setup, that's super easy to do. With no water/meth, the temps skyrocket to 200+ almost instantaneously. But with the water meth, temps will extremely quickly drop sub-140. So pretty much, when the air charge temps are less than 140, we are 100% sure that the methanol system is working properly, and thus throw the timing to its arse. This way, we are increasing the timing from the lower ACTs, but we are also taking advantage of the octane from the methanol because the cool ACTs tell us that there's definitely methanol there. That's why I'm able to run 24 degrees of timing on the same ACTs that you're only able to run 18.

    But, with an intercooled setup that is only seeing ACTs in the 120 range, it may be harder to distinguish if the meth system is working by only looking at the ACTs. I honestly don't know how much the meth will bring the temps down. That's why I said (in one thread or another) to not be afraid to experiment and really throw some volume at it. Obviously you don't want the car to go super rich or bog down from all the extra fuel and water, but you still want the largest temperature difference possible so you can be more confident in the meth system working correctly, and thus more confidently (and safely) add in the extra timing.
    #27
    trombonedemon likes this.
  8. Modular2v

    Modular2v Founding Member

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    I live down the street from devils own... Their customer service is great
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