Pros/Cons of 100%meth or 50/50 mix
Feb 17, 2007, 06:12 PM
#21
The more methanol you run the more gasoline you have to pull out of your tune to get the AFR right, so the more dependent you become on the kit and whatever failsafe you have working properly. Also, keep in mind that water does pull heat out more efficiently than either alky or meth (water > meth > alky). The idea of 50:50 is to get the octane benefit of the alky/meth and the cooling effect of the water, while reducing the risk to the engine of an injection failure. I would think that 100% meth would make the most power if you inject enough of it, but also carry the greatest risk of oil dilution and detonation on a failure event.
Feb 17, 2007, 06:16 PM
#22
100% methanol is how our meth kits are setup and recommended to run. This is how we install and tune them as well.
I think our performance feats speak for themselves. 405whp/445tq on a SAFC and reflash with HKS 280 280 cams with our meth kit back in June of 2005.
Est 575whp and 10 second passes now on a slightly modified 100% meth kit of ours on factory IX turbo with supporting mods in 2006.
I think our performance feats speak for themselves. 405whp/445tq on a SAFC and reflash with HKS 280 280 cams with our meth kit back in June of 2005.
Est 575whp and 10 second passes now on a slightly modified 100% meth kit of ours on factory IX turbo with supporting mods in 2006.
Feb 17, 2007, 06:17 PM
#23
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I know a few have had some issues with 100% meth causing their pumps to overheat, especially on a dyno or with road racing. Running a mix to lower the boiling point may be of greater concern vs cost. I still run 100% meth however.
Feb 17, 2007, 06:27 PM
#24
The answer is a volume based answer. If you are running a small jet like 500cc you can run 50/50 mix 250cc water and 250cc meth is not a problem and will work well. With higher volume jets like 1200cc you cannot add 600cc water, they will work best just 100% meth. or up to 20% water if you really insist that water needs to be present. A single 15g/hr jet at 200psi is 1200cc+.
Feb 17, 2007, 07:06 PM
#25
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UCC, that's just one example. 100% has a good bit more power potential than 50/50.
OP, there's nothing special about Aquamist in terms of safety. If you're referring to failsafes, then fine, but you don't even have to run meth if you're worried about corrosion. I run 100% denatured alcohol, because it's not toxic, and because I can get it just about anywhere. Meth is harder to source, but it's cheaper. You can run 100% alky in any major kit with no worries whatsoever.
OP, there's nothing special about Aquamist in terms of safety. If you're referring to failsafes, then fine, but you don't even have to run meth if you're worried about corrosion. I run 100% denatured alcohol, because it's not toxic, and because I can get it just about anywhere. Meth is harder to source, but it's cheaper. You can run 100% alky in any major kit with no worries whatsoever.
fouling agents like Acetone, Methyl Ethyl Ketone, Dichloromethane, Methanol....is added to poison the stuff to prevent drinking.
Feb 17, 2007, 07:55 PM
#26
A Few Notes . . .
- Nozzles like M10 and M15 are rated at 10 and 15 gph respectively at 100psi. That works out to 630 and 946cc/min respectively.
- Most injection pumps deliver around 100psi at the line, but keep in mind this is working against manifold pressure, so the actual injection rate is less than published.
- More than double the mass of methanol vs. gasoline is required to affect the AFR.
- The issue with running 100% methanol is the fact that methanol tends to eventually erode the santoprene pump diaphragm. If 100% methanol is used, one may want to keep a few extra diaphragms on hand, pending someone having a Teflon one made.
- Issues of methanol contaminating the oil and other related aggravations primarily pertain to vehicles running 100% methanol as the primary fuel (not momentary methanol injection).
- Nozzles like M10 and M15 are rated at 10 and 15 gph respectively at 100psi. That works out to 630 and 946cc/min respectively.
- Most injection pumps deliver around 100psi at the line, but keep in mind this is working against manifold pressure, so the actual injection rate is less than published.
- More than double the mass of methanol vs. gasoline is required to affect the AFR.
- The issue with running 100% methanol is the fact that methanol tends to eventually erode the santoprene pump diaphragm. If 100% methanol is used, one may want to keep a few extra diaphragms on hand, pending someone having a Teflon one made.
- Issues of methanol contaminating the oil and other related aggravations primarily pertain to vehicles running 100% methanol as the primary fuel (not momentary methanol injection).
Feb 17, 2007, 08:14 PM
#28
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santoprene is actually stands up to methanol pretty well.
http://www.santoprene.com/site/Resou...ance_guide.pdf
its good maintanence to switch out the diaphgram and even the in/out valves once or twice a year to ensure good pumping.
http://www.santoprene.com/site/Resou...ance_guide.pdf
its good maintanence to switch out the diaphgram and even the in/out valves once or twice a year to ensure good pumping.