alcohol injection???
yup, you can get it at a drug store. theres normal 70% and the better 91% that doctors use.
the setup that i used to run was overkill, but i felt that the fine mist from the fogger jet spraying into the intercooler was very effective.
you most likely could get similar results from just spraying near the TB, but i liked the idea of the evaporative cooling of the alcohol when misting it into the IC.
the setup that i used to run was overkill, but i felt that the fine mist from the fogger jet spraying into the intercooler was very effective.
you most likely could get similar results from just spraying near the TB, but i liked the idea of the evaporative cooling of the alcohol when misting it into the IC.
it would be interesting to see an experiment to determine if spraying a mist into the IC or spraying near the TB is more effective.
one thing to remember though, if your going to spray the IC, it would be best to use a misting nozzle so that the isopropyl doesnt pool in the IC and become useless.
ive been thinking if having the spray cool the intercooler, or having it vaporize in the cylinders is best...
imagine having direct port alcohol injection. now thats overkill.
one thing to remember though, if your going to spray the IC, it would be best to use a misting nozzle so that the isopropyl doesnt pool in the IC and become useless.
ive been thinking if having the spray cool the intercooler, or having it vaporize in the cylinders is best...
imagine having direct port alcohol injection. now thats overkill.
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240Kuminachu
- Posts: 286
- Joined: Sun Sep 01, 2002 4:54 am
well isopropyl is alcohol. i believe 91% isopropyl has a latent heat of vaporization [energy absorbed during vaporization] that exceeds methanol.
***EDIT***- it does not have a higher LHV. methanol has the highest LHV out of methanol, ethanol, and isopropyl. however methanol is corrosive. ethanol and isopropyl are not.
it turns out that contrary to my belief, 100% denatured alcohol [ethanol] is the best to spray.
***EDIT***- it does not have a higher LHV. methanol has the highest LHV out of methanol, ethanol, and isopropyl. however methanol is corrosive. ethanol and isopropyl are not.
it turns out that contrary to my belief, 100% denatured alcohol [ethanol] is the best to spray.
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240Kuminachu
- Posts: 286
- Joined: Sun Sep 01, 2002 4:54 am
Dam, you guys are good..
Ok, so what are the draw backs of using this sort of injection, I know water is only good for it, but will the ISO or the alcohol cause any problems. Like Nitros? I know injecting alcohol will cause temperatures to rise and with heat comes bad things, but what exactly will this do to my motor?
Also, I been pondering.What if you put water injection before the intercooler and alcohol after the intercooler, right into the intake. Would this not lower temps and increase power, or keep temp the same and increase power? Seems like a good idea.
Ok, so what are the draw backs of using this sort of injection, I know water is only good for it, but will the ISO or the alcohol cause any problems. Like Nitros? I know injecting alcohol will cause temperatures to rise and with heat comes bad things, but what exactly will this do to my motor?
Also, I been pondering.What if you put water injection before the intercooler and alcohol after the intercooler, right into the intake. Would this not lower temps and increase power, or keep temp the same and increase power? Seems like a good idea.
well, anytime your injecting water, your not increasing power. your making the cylinder temperatures lower and the mixture richer, resulting in the ability to increase boost.
its the increase in boost that you gain power from.
but with water/alky injection, theres only so far you can go. as you inject more and more water/alky you will get to a point where you will start to lose power because your displacing too much air.
just like the fuel mixture, the injection system needs to be tuned for the best response/cooling.
thats why i overelaborated the system on my DSM. with the nitrous nozzle and jet pills, i was able to adjust the flow of alcohol. also, with the FPR, the flow rate remained constant instead of pinching off at high boost. if the pressure is kept constant while boost increases, the pressure of the fluid will drop relative to the boost pressure and the flow will decrease as boost rises.
what i would like to come up with is maybe a rising rate regulator or a solenoid duty cycle that varies with boost pressure.
the one thing i didnt like about my old setup that im going to try to rectify on my next one is that the flow remained constant over the entire boost range. i would rather have the flow increase as boost increases.
as far as the setup tuning, what you have to do is increase the injection untill the car starts to bog, then back off. thats why the NOS jets work very well. you can tune with flow pills.
its the increase in boost that you gain power from.
but with water/alky injection, theres only so far you can go. as you inject more and more water/alky you will get to a point where you will start to lose power because your displacing too much air.
just like the fuel mixture, the injection system needs to be tuned for the best response/cooling.
thats why i overelaborated the system on my DSM. with the nitrous nozzle and jet pills, i was able to adjust the flow of alcohol. also, with the FPR, the flow rate remained constant instead of pinching off at high boost. if the pressure is kept constant while boost increases, the pressure of the fluid will drop relative to the boost pressure and the flow will decrease as boost rises.
what i would like to come up with is maybe a rising rate regulator or a solenoid duty cycle that varies with boost pressure.
the one thing i didnt like about my old setup that im going to try to rectify on my next one is that the flow remained constant over the entire boost range. i would rather have the flow increase as boost increases.
as far as the setup tuning, what you have to do is increase the injection untill the car starts to bog, then back off. thats why the NOS jets work very well. you can tune with flow pills.
