Double_J

iTrader: (28)

I was wondering if anyone intentionally lowers the temperature of the liquid they are injecting.

When I have my car parked in the garage vs outside in the hot sun I notice a significant difference in how quickly my intake temps drop.

I imagine if you are running a mixture of water and meth (or antifreeze) that you could put the liquid in the freezer prior to taking it out. It's safe to assume you can have an even larger impact on the temps.

Has anyone done this, and also is it even worth the trouble??

proz07

iTrader: (6)

are you drag racing..... cause if not its not worth the hastle. itl just heat back up in a matter of minutes.

z

Double_J

iTrader: (28)

Not drag racing no. I know it will certainly warm back up in time. How quickly it warms back up will depending on how much liquid you can hold, and how cold you made the liquid.

I would guess it be in the 30-60 minute range. Certainly long enough to run down the 1/4 mile, make some dyno pulls, or do a few laps @ a track.

I guess if you needed more time, let's say at the track you could also put some AI liquid in a cooler (along with a few beverages).

pmrobert

From a purely physics point of view, that would contribute relatively very little to heat reduction of the charge mass. On the other hand, it should be safe, is very inexpensive, doesn't carry a weight or complexity penalty so "Why not?". Let us know what you observe. AI reduces observed temperature mostly via a property of most liquids known as latent heat of vaporization. This occurs when a substance changes phase (liquid to gas in our use). A significant amount of heat is required for this phase change to occur and subsequently the temp of the air (the charge mass) is reduced. All liquids take different amounts of heat to change phase, it just so happens water is by far the leader. See http://www.engineeringtoolbox.com/fl...eat-d_147.html for a table comparing common liquids.

ronbros3

add to the topic;
i read (somplace,dont ask), that the water should be heated to just below boiling,like 200F, then it can vaporize much quicker, which is needed for a rapid heat absorbtion.

pmrobert

I don't know about MUCH quicker but it would be quicker. It takes relatively little heat to get liquid water to 100C, a bunch more heat is required/absorbed with the phase change from liquid to gas. Good point though - time for thought experiments...

BDC

Good thinking, Double_J. There's technical merit to your question. What pmrobert said is a good response. It's also why I'm not a fan of keeping an AI water (and especially anything with alcohol!!) tank in the engine bay.

B

ronbros3

add to topic. i said this 10yrs ago

at some point, all alcohols will DETONATE, water never will(at least not what we know,at this point, in our knowledge).

also 10yrs back, if we are tryin to kill our rotarys ,, why not NITROMETHANE, if somebody gets it figured out ,they are gonna win a lot of races.