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Is there an advantage to injecting pure meth for cooling and raising the octane? You never know what kind of gas you are pumping anymore so I was thinking about doing pure meth on a 10 or 15 nozzle.
Is there an advantage to injecting pure meth for cooling and raising the octane? You never know what kind of gas you are pumping anymore so I was thinking about doing pure meth on a 10 or 15 nozzle.
Absolutely. Pure meth definitely raises knock resistance while adding fuel and cooling the intake charge. Water mixed in only serves to absorb heat, which does effectively raise knock resistance. Water, however, does not evaporate nearly as readily as meth, and adds nothing for fueling. The tradeoffs, however, are significant. Pure meth is flammable in your container, whereas a less than 50% mix of mostly water is not. This is much safer. A water mix is also FAR less corrosive than pure meth. That being said, I always took the route of using pure meth instead of a mix, but the decision was not taken lightly, and was influenced by having a marginally adequate fuel system for my high boost setting.
Water certainly has a higher latent heat capacity, but needs to be atomized better to work properly. Alcohol has a lower phase change temp which is beneficial other than octane.
Absolutely. Pure meth definitely raises knock resistance while adding fuel and cooling the intake charge. Water mixed in only serves to absorb heat, which does effectively raise knock resistance. Water, however, does not evaporate nearly as readily as meth, and adds nothing for fueling. The tradeoffs, however, are significant. Pure meth is flammable in your container, whereas a less than 50% mix of mostly water is not. This is much safer. A water mix is also FAR less corrosive than pure meth. That being said, I always took the route of using pure meth instead of a mix, but the decision was not taken lightly, and was influenced by having a marginally adequate fuel system for my high boost setting.
I've put 40% meth in a container about 1/4" deep and lit it with a match. It will burn a clear/bluish flame. Don't know if the blue was normal or just caused by the windshield washer fluid, but it definitely will burn at lower than 50% mixtures.
I've put 40% meth in a container about 1/4" deep and lit it with a match. It will burn a clear/bluish flame. Don't know if the blue was normal or just caused by the windshield washer fluid, but it definitely will burn at lower than 50% mixtures.
That's interesting as I thought boost juice wasn't flammable and it's 49/51.
I've put 40% meth in a container about 1/4" deep and lit it with a match. It will burn a clear/bluish flame. Don't know if the blue was normal or just caused by the windshield washer fluid, but it definitely will burn at lower than 50% mixtures.
You mention 40% meth, but then also mention WW fluid. I was referring to a pure meth/pure water mix. That being said, I do not know the exact ratio at which the mix becomes flammable. However, I believe we can all agree that a 50% water solution will not light as easily as pure methanol.
Not sure where most of you put your tanks, engine comp, trunk, roof, etc, lol, but being a small station wagon the only place I could mount mine was in the back near the hatch. There was a trap door area below, not big, but room to mount the pump. I had to use a sol. so it couldn't gravitate into the engine. Not sure if that location is considered safe or not, but didn't think it was a fire hazard. I keep a towel over it, just so I don't have to answer questions, lol.
Why not just run the M1 instead of all the mixing stuff? I think I pay $3 a gallon for it. Turns on after 4psi so I only use it when I’m screwing around. 93 oct so I can drive anywhere without worry of fuel.
I have stock rod gen3 5.3 with 870/830. The M1 is mainly the reason it’s alive I’m sure lol. Peak tq timing is 12* and tapers back up to 14* after the curve… 22psi with twin gt35s.
I have the Alkycontrol kit though so that pump is made to last with M1. Not sure how good the snow performance pump is.
Others have had the exact opposite experience where they had an overboost and the water is what saved the motor.
I would think the octane is most important at that level but I honestly wouldn’t have that answer. I have put 24 psi to it for a moment but chasing a low voltage issue so injector duty cycle is at 100.
That's interesting as I thought boost juice wasn't flammable and it's 49/51.
I've seen some tests that suggest the boost juice is much less than 49% methanol and that devils own was an even lower percentage.
Originally Posted by Z32_5.3
Why not just run the M1 instead of all the mixing stuff? I think I pay $3 a gallon for it. Turns on after 4psi so I only use it when I’m screwing around. 93 oct so I can drive anywhere without worry of fuel.
I have stock rod gen3 5.3 with 870/830. The M1 is mainly the reason it’s alive I’m sure lol. Peak tq timing is 12* and tapers back up to 14* after the curve… 22psi with twin gt35s.
I have the Alkycontrol kit though so that pump is made to last with M1. Not sure how good the snow performance pump is.
Every one has different fuel availability and combos that may have different needs. For example I'm at 19 psi on a 377 I run 50% ethanol and only a 3 gph nozzle currently with about 50/50 water/meth on at 4 psi. My peak timing is 18 and the plugs show I could probably run 20. I just don't have a need to push it that far unless I'm in a race I know is going to be neck and neck then I would add a little rpm to the shift points and put those 2 degrees in. Haven't switched to a larger nozzle yet, but plan to soon maybe to a 5 gph. I don't want to rely on the water/meth it just adds a little cushion and availability to add timing if I need to and adding rpm also adds peak boost due to the nature of the procharger.
If I was running pump only instead of ethanol then maybe straight M1 would be better. I also have an ethanol gas station and an oreilly's practically right near me with plenty of wwf and heet in stock always. It's a matter of what works for me and is readily available. To get M1 is a lot longer drive for me plus to consider the additional flammability risks.
I would think the octane is most important at that level but I honestly wouldn’t have that answer. I have put 24 psi to it for a moment but chasing a low voltage issue so injector duty cycle is at 100.
JoeNova has a good story about an over boost. @AwesomeAuto
Is there an advantage to injecting pure meth for cooling and raising the octane? You never know what kind of gas you are pumping anymore so I was thinking about doing pure meth on a 10 or 15 nozzle.
Performance gained is directly proportional to the amount you can inject. (and where its injected IMO ) With meth there is no limit. You can literally replace 20-50% of your total fueling with straight meth. When using a knock limited fuel, This will yield MUCH better results that any amount of water, as the water will cause ignition issues at any real volume. Then of course you have distribution issues to deal with if you do spray high volumes.
So the big compromise is to mix both and spray in smaller volumes because its easy and practical.
If you want big results and put in the time and effort, you can have "E85 like performance" with pump gas and meth injection. You can also mix your own M20,M30,M50 fuels. This way you don't have to worry about distribution. Few Turbo Buick buds have been mixing their own 91 with 20-30% meth for years. And have had great results similar to E85(also no noticeable issues with filters ,lines, corrosion, etc) . Its easier than setting up a direct injection system and worrying about distribution at high volumes. They also spray straight meth on top of that, but at the standard small volumes. (15-30gph)
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