Fuel Economy & Emissions Talk about the mileage database, EPA, hypermiling, gas and driving strategy.

2007 Prius cold air intake

  #1  
Old 05-28-2007, 04:43 PM
2007 Prius owner
Thread Starter
Join Date: May 2007
Location: SC
Posts: 17
Default 2007 Prius cold air intake

Would the Prius get better milage if it had a cold air intake on it?
 
  #2  
Old 05-28-2007, 05:29 PM
bwilson4web's Avatar
Engineering first
Join Date: Oct 2005
Location: Huntsville, AL
Posts: 5,613
Default Re: 2007 Prius cold air intake

Originally Posted by billynjoanna View Post
Would the Prius get better milage if it had a cold air intake on it?
It has a cold air intake. Some folks are of the opinion that warming the air in the winter improves mileage. However, this remains something still under discussion.

Recently, I developed a technique for measuring gasoline energy content but testing at 60F and 88F has not shown a significant change in ICE efficiency within the same tank. When the colder weather comes back, I'll re-run the tests with a wider temperature range.

Bob Wilson
 
  #3  
Old 06-04-2007, 10:08 AM
Active Enthusiast
Join Date: Dec 2005
Posts: 54
Default Re: 2007 Prius cold air intake

cold air intake is often a misnomer. they are very simply an exposed filter on a tube and may or may not provide cooler air entering the MAF sensor. on a prius they would be a waste of money i would think. i'm sure the prius engineers designed a very efficient airbox for your small displacement engine. keep your filter clean or throw in a k&n if it makes you happy. it will last the lifetime of your car (but require a re-oil every ~50K miles or so)
 
  #4  
Old 06-04-2007, 06:41 PM
gpsman1's Avatar
Hybrid and Ethanol Expert
Join Date: Mar 2005
Location: All over the Central U.S.
Posts: 3,589
Default Re: 2007 Prius cold air intake

I agree. Cold air intakes are designed to add more oxygen, and create more horsepower, burning MORE GAS in the process.

Liquid gasoline does not burn. Only gasoline vapors burn. The colder the air/gas mixture, the more difficult it is vaporize to ignite, and you risk loosing more gas unburned out the exhaust.

A WARMER air intake is going to be a more fuel efficient one.
-John
 
  #5  
Old 06-05-2007, 06:56 AM
Active Enthusiast
Join Date: Dec 2005
Posts: 54
Default Re: 2007 Prius cold air intake

actually, no. a cooler charge makes more hp and is more efficient. why do you think turbocharged engines are intercooled...
cooler air makes for better combustion (up to a point) & lower intake temps enable the engine to advance timing - hotter cylinder temps lead to predetonation/knock. if the cylinder temps are too high the engine ecu will compensate by making a richer mix in order to cool things down (more gas used). again, turbocharged engines will see this on a greater scale, but the same principle applies to NA engines as far as i know.
 
  #6  
Old 06-05-2007, 07:35 AM
MPG FANATIC WITH GUZZLERS
Join Date: Sep 2005
Location: New Orleans
Posts: 521
Default Re: 2007 Prius cold air intake

Lowering the resistance between the throttle plate and the outside won't change the part throttle fuel economy on a modern spark ignition car.In part throttle operation Any drop in resistance upstream is simply countered by closing the throttle plate;any increase in resistance is countered by opening it a little until the amount of mixture is what is required to pull the load.
In the sort of driving most folks do on this forum, you could tape about 20% of the air horn off,and you wouldn't be able to measure any change in FE.
CAIs might improve peak hp(the ones commonly sold probably drop hp at many RPMs), but they won't improve FE on a modern car.
Luck,
Charlie
 
  #7  
Old 06-05-2007, 07:23 PM
gpsman1's Avatar
Hybrid and Ethanol Expert
Join Date: Mar 2005
Location: All over the Central U.S.
Posts: 3,589
Default Re: 2007 Prius cold air intake

Sorry Pete. Everything you said goes against chemistry and physics.
I already said cold air intake systems provide more horsepower.
This is at a cost of more fuel being burned.
Any cold air intake is NOT designed for fuel economy.
Don't take my word for it, and please don't argue with me and tell me I'm wrong. Go out and try it.
 
  #8  
Old 09-07-2009, 05:46 AM
Enthusiast
Join Date: Sep 2009
Posts: 5
Default Re: 2007 Prius cold air intake

A cold air intake is a device used to bring lower temprature air into a car's internal- combustion engine to increase engine power and efficiency.cold air intake systems come in many different colors and sizes,and are easy to install when compared with other performance-increasing modifications.


Intakes are one of the most popular, easy and cost efficient options to improve your car’s speed and horsepower.




quebec used car dealer
 

Last edited by usedcar129; 09-09-2009 at 08:59 AM.
  #9  
Old 07-19-2011, 08:59 PM
Enthusiast
Join Date: May 2011
Posts: 30
Default Re: 2007 Prius cold air intake

Originally Posted by billynjoanna View Post
Would the Prius get better milage if it had a cold air intake on it?
Have you tried (temporarily) running the gasoline engine with the original equipment air cleaner housing lid removed? No air filter is even better than a low restriction air filter.
 
Related Topics
Thread
Topic Starter
Forum
Replies
Last Post
collegejester
Toyota Highlander Hybrid
1
12-01-2007 10:25 AM
billynjoanna
Toyota Prius
0
05-29-2007 02:18 PM
rgx
Honda Civic Hybrid
3
05-08-2006 07:27 PM


Thread Tools
Search this Thread
Quick Reply: 2007 Prius cold air intake


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.