Using dry ice to improve performance and fuel economy

**boydapa** · March 30th, 2005 12:03 PM

eh kng ideretso ko nalang sa aircon ko yun intake(lagyan ng tubo)---may aircon ka na, cold air intake ka pa hehe

**SubaruSti** · March 30th, 2005 12:07 PM

Hindi maganda ang cool air sa engine,hindi magiging maganda ang combustion.naka2bawas ng life span ng engine ang cold air intake. kung balak mo talaga patagalin ang sasakyan mo keep it stock,kung gus2 mo naman pabilisin modify it,severely modified cars doesnt last long compare to stock.

**corbon44** · March 30th, 2005 02:03 PM

F1 teams use dry ice to keep their cars cool (saw them stuffing the chunks into the sides) sa starting grid kapag masyadong mainit ang track...other than that haven't really seen how it's used...

**alwayz_yummy** · March 30th, 2005 05:08 PM

maybe the dry-ice is used only to cool the engine...

pansin ko ganito..pag cool engine ng van(normal operationg temperature, which is 1/4 of the temp. gauge)ok ang performance..but kung noon time,parang sluggish ang performance and the gauge went over 1/4 mark to half...pero mag humigit by a "pinkie finger" sa 1/2, ramdam na ang sluggishness..

one time i hose down my oil coolers, condensers and radiator with water...cold but when it passed on the parts, the water is near boiling hot..when i checked my uged and seen it returned to 1/4,i went off....since the wheather is hot that day on NLEX, it immediately rose to 1/2 again....

opinion ko lang using ordinary water...havent tried dry-ice..diba ang evo-8 may sprayers sa intercooler?

**ARB** · March 30th, 2005 08:46 PM

before drag racers have a canister with cold ice or dry ice inside with the fuel line passing in the middle, cold fuel parang nitrous daw ang effect, its easier to burn.

**quiksie** · March 30th, 2005 10:23 PM

diba pag nadikit ang dryice sa metal ay may tunog na masakit sa tenga. Try niyo idikit ang kutsara masakit sa tenga ang result. Bakit ganun?
Ako nakabukas ng konti ang hood ko para may ram air effect, since wala ako ram air hehe. Nakabukas ng kontio ang hood ko para mahanginan din ang makina. Ayus din pakabit ng airfilter, mine is k&n sa gsr ko nakakatulong din

**scarab** · March 30th, 2005 11:15 PM

Originally Posted by ARB

before drag racers have a canister with cold ice or dry ice inside with the fuel line passing in the middle, cold fuel parang nitrous daw ang effect, its easier to burn.

...i think this is what they do before. not to cool the engine but to cool down the fuel.

**the_golden_boy** · March 31st, 2005 01:02 AM

cool air DOESN'T mean more oxygen.

actually, from what i recall, sucking in cool air will result in a greater amount of oxygen taken in during the intake stroke. because any matter that is cooled becomes denser, which is a result of the the molecules becoming more compact. the same principle explains why sealed cooking pans, rice cookers etc. all expel air at high speeds when heated, the heated matter expands due to the decrease in density increasing the amount of pressure in a given unit of volume, and if you cool the matter the opposite hapens. the matter becomes denser and therefore becomes more compact. More compact matter means that there will be a greater amount of matter per unit of volume than matter that is less dense.

Remember, as you climb/drive to higher altitudes you get less oxygen but air gets colder.

in truth, the amount of air in the atmosphere is directly proportional to altitude. so the higher you go the thinner the air becomes. it is true that the amount of oxygen is less when you are at higher altitudes but this is not because the temperature is lower. it is in fact due to the increasing altitude.
The troposphere is the lowest layer and contains about 75% of the total mass of the atmosphere, but the thermosphere, which is one of the two outer layers contains less than 1% of the total mass of the earth's atmoshpere. The thermosphere's temperature could reach 441 degrees farenheit, which is very hot. If you believe that the amount of air decreases when the temperature decreases then this layer should have the largest percentage of mass of the atmosphere. But it doesn't. Air is closer to the lowest layer because of gravity.

So colder oxygen means more oxygen per unit of volume.