True... True... 2 trannies and 2 clutches in 7000 miles says it all. :doh:

 

Thoughts on alcohol injection?

 

Man... that's a display block if I've ever seen one. It took me over a month to polish my head. It would take eons to polish a block unless it was CNC'd (is it?...). I doubt polishing would be an optional thing, because I wouldn't touch a polishing job like that on a cast part for less than $2500, and even then I would still have to be forced to do it.

 

Alcohol injection is more commonly used in NA applications because it doesn't require the higher pressure like water does to atomize properly. Water puts the fire out on NA setups. Alcohol adds fuel, and that's not all bad, but I'd say it isn't necessary on a boosted setup if you're just trying to extend your knock ceiling. If you want another fuel source, look into propane injection.

Some people mix alcohol into their water injection systems. It keeps it from freezing up in the winter, and since ambient temps are lower, your engine is already cooler. If you're not close to the knock ceiling, (keeping exhaust temps well under 850°C), then you'll be able to make a few more horsepower by adding alcohol. But the inert gas which is water vapor actually does just fine at increasing your compression while lowering combustion chamber temps.

Using alcohol is one of those things that just takes some expiramenting. The water injection setup doesn't have to be modified at all to use it, so... I'm sure you'd find a way.

 

Where was all this info about water injection last month when i was askin bout it!!!

WCS goo luck on u'r build.. it's sounding a lot like mine! only mine is still on the engine stand.. needs to go back into the car but i messed up one of my motor mounts ( broke off bolt )

Your Definatly going to have a fast car!

 

I was talking to a DSM guy that I work with that was going on about it. He said something about how water injection might not be the best route because of my FMIC. Said that the temps will be a lot cooler that a non FMIC setup and that the water wouldn't atomize completely because of the lower temp.

He was also talking about how all the GN guys are using alchohol no their turbo setups now.

I think that the different injection methods are debatable just like the SC/Turbo comparison. Is this accurate?

 

It's true. Your IC will dramatically lower temps, in effect, doing 1 of the things that what water injection is supposed to do. But the water vapor that serves as an inert gas pushes back the detonation limitations of whatever fuel you're using, so if you have a problem with knocking over (x) PSI with (x) fuel, using water injection will allow you to turn the boost up even more and extend that limitation no matter how efficient your IC is.

A lot of people run WI in lieu of replacing their intercooler because of the cost differential, but there's no reason why you can't run both and achieve more than 100% efficiency between both setups.

Basically, it won't hurt you or work against you. It all depends on whether or not you're knocking as to whether or not you'll need it, and my bet is that if you push 20 PSI on 9.5:1 pistons with pump gas, you're going to see lots of it. Watch your EGT's, and keep 'em under 850°C. If they rise over 850, you can benefit from it regardless. If they're below 850, adding alcohol to the mix can put a little extra fire under your ass. A little more power, too. Like I said, it's one of those things where you have to expirament to find out what works perfectly on your car. So, yes. It's like the SC/Turbo debate only with alternate fuels.

 

you should donate your car to a good charity...

... like ... me?

That's pretty sick though, with 400whp what kind of axles are you going to be using? I know alot of people run up to like 300 with the stock ones, but eventually they're bound to blow. Some stage 2's might do the trick eh?

I can imagine hearing that turbo go by... with that BOV you should be making plenty of sound.

:thumbup: As ALWAYS, good job... also hit me up on AIM at "xphaseoneeklipz"... I am doing a turbo b18c, and theres plenty of parts I need... wondering what your prices are.... thanks!

 

Hmm... would getting an EGT and noting the readings be the best way to determine which setup to go with?


Not sure about axles. I think I'll run my NAPA ones until they give and go from there.

I hit you up, no reply.
I have plenty of crap I want to get rid of!

 

Are you serious? You don't have an EGT gauge already?

An EGT gauge won't tell you what to fill your WI system with. It would be the same system whether you run water or alcohol. Your EGT reading will only tell you if you need it or not.

BUT!!!! You can still benefit from WI whether or not you need it. You just have to be able to break 17 PSI to make it work right, that's all. If you don't have a big IC, you can get away using it with lower boost, but the nozzles should be located closer to the compressor outlet if that's the case.

No EGT gauge? 12's? Man... you've been lucky so far.