should an ecotec loose a noticable amount of power in 40 degree heat?

[pillzor]

just wondering because mine seems too love the 40 degree days, must mean those super 6 cai`s do actually work!

[Rossbx]

The Ecotechs work more efficiently and economically when hot. Normal operating temp is around 100 degrees C, so no they shouldn't lose power at all

[Brett_jjj]

Mine goes better the colder it is, seems to loose a bit on very hot days ,enough to notice it.

[WogBoyz]

Mine goes better the colder it is, seems to loose a bit on very hot days ,enough to notice it.

yup thats cus the colder the air the more dense it is, therfore more air gets sucked in and more power

[Chris E]

My buick does this, I think most cars would because as stated before, hotter air is less dense, can fit less oxygen in the cylinders, less power.

[danja]

The Ecotechs work more efficiently and economically when hot. Normal operating temp is around 100 degrees C, so no they shouldn't lose power at all

He's talking about the ambient air temperature, not the coolant temperature.

What others have said about hot air being less dense is true, and this will convert to less petrol being burnt. For those two get basic chemistry, hydrocarbon + oxygen = water + carbon dioxide + energy, using say ethanol as a simple example:

C2-H5-O-H (ethanol) + 3 O2 (oxygen) ---(combustion)---> 3 H2-O (water) + 2 C-O2 (carbon dioxide) + energy

So for each molecule of ethanol, you need 3 molecules of oxygen to burn it and release the energy stored in that fuel. Your engine displaces a fixed volume, so as the air becomes less dense you fit less molecules of air into each cylinder, and you burn less fuel per power stroke, meaning "lost" power. You can think of it essentially as reverse turbo-charging.

[pillzor]

ok so this is some + 1 argument for all the super 6 OTR CAI working or not arguments going on in this website atm then.

[immortality]

just wondering because mine seems too love the 40 degree days, must mean those super 6 cai`s do actually work!

thats because the ambient air temp is getting a lot closer to the underbonnet air temps that effect the super6 CAI and on those days that it is cooler your not getting the benefit of that cooler air hence the sensation that your car goes well when high ambient temps

[Vee-ard]

thats because the ambient air temp is getting a lot closer to the underbonnet air temps that effect the super6 CAI and on those days that it is cooler your not getting the benefit of that cooler air hence the sensation that your car goes well when high ambient temps

yeah, LOL @ the +1 argument.

[Dinwoodie]

I have never been in a naturally aspirated car that doesnt lose noticable power in the hot weather. Have been in quite a few intercooled turbo's that hot weather doesnt seem to bother though

[pjdm1980]

Not really any diff in my S/C 6
Never runs over 1/4 for to long or the fan kicks in and drops it back down.

[Crossy_014]

mine runs horribly over 40

[hako]

Don't forget your aircon compressor is running flat out at those temperatures and drags a few KW.

[aceventura]

C2-H5-O-H (ethanol) + 3 O2 (oxygen) ---(combustion)---> 3 H2-O (water) + 2 C-O2 (carbon dioxide) + energy

Danja, you've done a better job than some high-school teachers I know!

Another piece of information to put this into perspective - The density of air halves moving from 25 degrees to ~300 (323.15 to be exact) degrees. So for a given volume of air at 25 degrees - if you heat that to ~300 degrees, it will occupy twice the volume at the same pressure.

[hako]

Danja, you've done a better job than some high-school teachers I know!

Another piece of information to put this into perspective - The density of air halves moving from 25 degrees to ~300 (323.15 to be exact) degrees. So for a given volume of air at 25 degrees - if you heat that to ~300 degrees, it will occupy twice the volume at the same pressure.

That is one reason why 'modern' engines run so hot - once the air is past the throttle body the higher engine temps cause a slight but measureable increase in the pressure of the air in the induction passages and combustion chambers. So the cooler on the outside is good and hotter on the inside is also good.

[danja]

Danja, you've done a better job than some high-school teachers I know!

I'm glad all that HSC chemistry wasn't a complete bloody waste of time!

[greenfoam]

You also have maps in the tune that will retard the spark over a certain air and coolant temps