Since you guys seem to fiddle with water/alky injection a bit here, I wondered if you would be kind enough to offer some input on that type of system on my 4 cylinder Turbo Dodge. Please excuse my ignorance and what are most likely very basic questions.
In short, it appears my 52 pph fuel injectors are out of steam. I decided to reactivate my old cold start injector setup (which used to inject gasoline), but converted it to alcohol injection. Here is a quick video of one of the three that are installed spraying. This mist appears to be pretty fine, at least to my untrained eye. Does it look sufficient?
http://mysite.verizon.net/res1elpe/alcohol.mpg
This system runs with its own EFI pump (got it off an old 280Z turbo) and has its own FPR that is boost referenced to hold injection pressure at 55 psi over boost. For a reservoir, I used an old coolant overflow bottle from a Peugeot I found at the junkyard awhile back. (This bottle can take pressure if need be.) There are three cold starts in the intake pipe so that should flow a pretty decent amount of alcohol/water (or whatever other fuel. Ive used methanol before and may try it again.) In short, not too bad for about 40 bucks total.
Any of you guys know about how much affect a given volume of alcohol has on power and or ability to run more boost? (These cold starts typically flow about 30 hp worth of gasoline each from all reports, but I am unsure how that volumetric flow rate will translate when alcohol is being injected. If I recall, isnt stoichiometric for alky about 7:1? If so, the cold starts "rating" might only be half of what they would be with gasoline?)
Since alcohol is an oxygenated fuel, any idea from past alky users how this will this affect my narrow band O2 voltages? I assume they will drop for a given actual A/F ratio? Any idea how this system will affect EGTs?
And...the final question.....What is the best ratio of water to alcohol? I have been planning on using straight 71% isopropyl with no additional water mixed in since this stuff is cheap and easy to find at Walgreens, Eckerds, etc, etc. Should I be looking for something different?
In short, it appears my 52 pph fuel injectors are out of steam. I decided to reactivate my old cold start injector setup (which used to inject gasoline), but converted it to alcohol injection. Here is a quick video of one of the three that are installed spraying. This mist appears to be pretty fine, at least to my untrained eye. Does it look sufficient?
http://mysite.verizon.net/res1elpe/alcohol.mpg
This system runs with its own EFI pump (got it off an old 280Z turbo) and has its own FPR that is boost referenced to hold injection pressure at 55 psi over boost. For a reservoir, I used an old coolant overflow bottle from a Peugeot I found at the junkyard awhile back. (This bottle can take pressure if need be.) There are three cold starts in the intake pipe so that should flow a pretty decent amount of alcohol/water (or whatever other fuel. Ive used methanol before and may try it again.) In short, not too bad for about 40 bucks total.
Any of you guys know about how much affect a given volume of alcohol has on power and or ability to run more boost? (These cold starts typically flow about 30 hp worth of gasoline each from all reports, but I am unsure how that volumetric flow rate will translate when alcohol is being injected. If I recall, isnt stoichiometric for alky about 7:1? If so, the cold starts "rating" might only be half of what they would be with gasoline?)
Since alcohol is an oxygenated fuel, any idea from past alky users how this will this affect my narrow band O2 voltages? I assume they will drop for a given actual A/F ratio? Any idea how this system will affect EGTs?
And...the final question.....What is the best ratio of water to alcohol? I have been planning on using straight 71% isopropyl with no additional water mixed in since this stuff is cheap and easy to find at Walgreens, Eckerds, etc, etc. Should I be looking for something different?
