Thats funny Aside from the hundreds of people that can make over 100hp from the stuff the three he read were REAL... those other few hundred people are just lying to help increase the company they originally got apparently screwed by. LOL

 

+1^^^^^ Lol

 

ok from what i've read briefly, direct alcohol injection can have an effective octane rating of 130.

non direct injected alcohol can raise your 91-93 octane fuel up to 104-108 effective octane. i will assume this upper limit of 108 is 100% alcohol.

now what does this mean? uhm... we're gonna have to do some really ruff and lame math here, but first of all 'effective' octane must clarified, alcohol of course has less REAL octane than gasoline but since it burns at a lower temperature (and also a lower yield) and the fact that it has a higher specific heat than air it helps lower the temps in the cumbustion chamber allowing you to put more boost in.

now the psi per octane on evos goes something like this. 91 octane you can get away with 22psi well tuned and safe. with 93 you can get away with 23-24psi and with br's miraculaous 94 octane you can get around 24. now these are REALLY ruff numbers because the actual psi per octane is prolly somewhere in the area of a fraction of a psi per octane and will vary greatly from car to car and varying elevations plus how hot your turbo is (so maybe i should have cited pounds per minute... but i don't have that info)! ok on with the numbers, we usually see a very safe 25-27 psi coming out of 100 octane and people running 110 and 116 can run anywehre from 30-35psi.

so what does this mean? uhm... iunno but you'll have to do a lotta guestimating here, basically the more alkie you have (the less water) the closer you will be to the higher end numbers. but i'm just putting the info here so you can guestimate.

oh and i'm sure you've all guessed that in the end it's all about the tuning, so the tuning has the last word. hope shiv gets on here and tells what he's seen most consistently with alkie.

 

I run 100% methanol which is very affordable. I am currently waiting on a 55 gallon drum of it. I have boosted 30+ psi with it and never had a problem.

PJ

 

One quick question-In order to boost so much (25+ psi) do you need a built engine or anything?

 

no u shouldnt as the methanol will decrease all chances of detonation. Just make sure it is working properly. There are some horror stories about it not spraying. Just ask calhoun he lost his evo due to it. Poor guy i feel bad for him......

PJ

 

how to safe the car from it?

 

1) Get a system capable of detecting faults like pump failure, broken lines, clog lines - and then able to cut boost or/and switch to a less aggresive map if you have one of those ems that allows it
2) Maintenence!!! check your in-line filter, nozzle, pump diaphgram, lines for kinks

Its not failsafe but you can reduce the risk

 

you would want headstuds, but hte stock bottom should be fine for even a gt35r pumping 25psi, don't make too much more htan 550 hp on stock bottom if you want at least some longevity.

aem is the only standalone i know of that is worth getting for evo and still has these alkie features, you'll notice about 90% of the peopel running alkie however either don't have aem or don't have these fail safes setup. lovely huh.

 

When Phill from Hydra was in town tuning a very nice wrx, i got to speak to him briefly. I believe they will have an ems for the evo soon and have the capability of map switching when a fault is detected

 

the newest SMC kits do not need a 3rd party lubrication. idk about other kits though

 

SMC switch from a fuel pump ( which requires the klotz lube) to a flojet pump. Thats a smaller version of the giant shurflo pump. They all use a santoprene diaphgram to pressurise the liquid. Good insurance to maintain the pump, give it new diaphgram, in/out valves once in a while

 

yeah i knew about this but they don't have an evo application yet... keeping fingers crossed, would like to see what they have to offer.

i'm a bit surprised people haven't said pump redundancy, it's quite common in pc cooling with water and peltiers, why wouldn't you do it with your car? that eliminates HALF the risk already, if you have two sets of everything then you can worry a LOT less.

 

The hydra kits have been out for a while.
But we wont get into it here. IMHO they do not compete on the same level as the AEM EMS

 

your "effective" octane rating depends on the amount of alcahol you inject as well as the type. remember that. If you think about it, it isn't worth trying to figure out the octane rating, seeing as you cannot tune this way. Perhaps if it is simply for comparison's sake I can see your point, but as to tuning it, since there is no "108 octane tune" and you would tune alc. injection the same as how you would tune race gas, there is no help in knowing octane number, seeing as you will generally target an AFR, then bump up timing till you see knock and back off.