im trying to collect and view more data of the effects of alky. i was wondering if anyone has any powerlogger or XFI runs with and without alky. Ive been doing some logging without alky and then turning it on and running it to see the effects it has on the intake charge. i was wondering if anyone has some hard data they could show me. Dont get me wrong here alky is awsome im just trying to look at the cooling data from other cars.
Alky Cooling Effect Data
- Thread starter Boost231
- Start date
Welcome!
By registering with us, you'll be able to discuss, share and private message with other members of our community.
BlackMetal
Active Member
- Joined
- Sep 29, 2005
- Messages
- 4,688
I'd be interested in that as well.
http://home.att.net/~alkycontrol/datalogs/data1.jpg
HTH
Depends how much alcohol, depends on where temp sensor is placed. The above done tests had teh sensor in the back of the intake below the coil pack.
HTH
Depends how much alcohol, depends on where temp sensor is placed. The above done tests had teh sensor in the back of the intake below the coil pack.
Scott Atk
Senior Member
- Joined
- May 25, 2001
- Messages
- 2,654
Don't know about WOT plenum temps without ALKY, but my plenum temp drops from a cruising temp of 125-140 to about 62 when I go WOT. This is with a dual nozzle ALKY CONTROL setup.
BlackMetal
Active Member
- Joined
- Sep 29, 2005
- Messages
- 4,688
The temperature drop will depend a lot on how much of the methanol actually vaporizes in the intake charge before the intake charge has reached the temperature sensor. Theoretically, you could get as much as a 200 F temperature drop from the vaporization of methanol.
The temperature drop caused by methanol in an air/fuel charge takes place when the methanol changes state from a liquid to a vapor (dissociation). When it is injected into the up pipe or plenum, the methanol doesn't change to vapor all at once. The rate at which the methanol vaporizes will have much to do with the quality of the mix with the air charge and the quality of atomization from the nozzle. The finer the atomization, the more surface area of the methanol that is available for immediate evaporization. There are other factors that come into play that affect the rate of vaporization. Temperature and pressure are some main ones. Higher temperatures promote vaporization of methanol and higher pressures inhibit it. Since, most likely, not all the methanol will have vaporized by the time the intake charge hits the temp sensor, you will not be able to obtain the complete temperature drop of the charge caused by the methanol. Some of the methanol will continue to vaporize in the intake runner and port, some will vaporize as it enters the hot cylinder and combustion chamber, some will vaporize as it makes contact to the hot intake valve, and most of the rest, if not all the rest, will vaporize from the buildup of heat during the compression stroke. The cooling effect of the vaporization will continue on well past the time the charge has passed the temperature sensor.
The temperature drop caused by methanol in an air/fuel charge takes place when the methanol changes state from a liquid to a vapor (dissociation). When it is injected into the up pipe or plenum, the methanol doesn't change to vapor all at once. The rate at which the methanol vaporizes will have much to do with the quality of the mix with the air charge and the quality of atomization from the nozzle. The finer the atomization, the more surface area of the methanol that is available for immediate evaporization. There are other factors that come into play that affect the rate of vaporization. Temperature and pressure are some main ones. Higher temperatures promote vaporization of methanol and higher pressures inhibit it. Since, most likely, not all the methanol will have vaporized by the time the intake charge hits the temp sensor, you will not be able to obtain the complete temperature drop of the charge caused by the methanol. Some of the methanol will continue to vaporize in the intake runner and port, some will vaporize as it enters the hot cylinder and combustion chamber, some will vaporize as it makes contact to the hot intake valve, and most of the rest, if not all the rest, will vaporize from the buildup of heat during the compression stroke. The cooling effect of the vaporization will continue on well past the time the charge has passed the temperature sensor.
Ever wonder why methanol engines like high CRs and boost pressures?
The higher CRs and boost pressures heat up the intake charge more, causing more complete vaporization of the methanol by the time of the spark event. If there's more vaporized methanol available during the starting stages of combustion to be burned with the oxygen in the air, mo power.
The higher CRs and boost pressures heat up the intake charge more, causing more complete vaporization of the methanol by the time of the spark event. If there's more vaporized methanol available during the starting stages of combustion to be burned with the oxygen in the air, mo power.
family sedan
New Member
- Joined
- Mar 27, 2008
- Messages
- 4
Has anyone measured the difference with denatured alcohol? Back in the day we found denatured a lot better than methanol or a methanol mix.
Warp6
Mine since '92
- Joined
- May 25, 2001
- Messages
- 1,877
http://www.turbobuick.com/forums/alcohol-nitrous-propane-tech/224454-alky-temps-tb.html
Scroll down to post #12 for a screen shot. This was last summer with a dual nozzle setup from Razor. The temp in my intake went from 132 deg. to 78 deg. running 20psi boost
Scroll down to post #12 for a screen shot. This was last summer with a dual nozzle setup from Razor. The temp in my intake went from 132 deg. to 78 deg. running 20psi boost
