Go Back   EcoModder Forum > EcoModding > DIY / How-to
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 07-17-2009, 01:32 AM   #11 (permalink)
16 Ferret Circus
 
bnmorgan's Avatar
 
Join Date: May 2009
Location: Ecru, Mississippi
Posts: 89

GrumblyDavidson - '00 Harley Davidson Road King FLHRP-I
90 day: 38.37 mpg (US)

e30 - '91 bmw 325iC Convertible
90 day: 25.63 mpg (US)

Golf - '04 Volkswagen Golf GL-TDI
90 day: 38.29 mpg (US)

HHR - '09 Chevy HHR LT Panel
90 day: 30.03 mpg (US)
Thanks: 10
Thanked 2 Times in 2 Posts
I'll shortly be working on an '88 festiva, carb 1.3L as my first project. I noticed that on the intake hat, there is a tube running to the fender, and a smaller metal tube running up to a valve of some sort, the other end attached to a heat shield on the exhaust manifold. If i force this valve to remain open, is that going to give me intake air that is too hot? Is hot air gonna help that much, and how much will it hurt what power there is? 70 mile per day commute through rural Mississippi.

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 07-18-2009, 01:33 AM   #12 (permalink)
EcoModding Lurker
 
Join Date: Jul 2009
Location: North Carolina
Posts: 77

The Odyssey Van - '11 Honda Odyssey EX-L
90 day: 29.1 mpg (US)

silver racecar - '13 hyundai accent GS
90 day: 38.8 mpg (US)
Thanks: 0
Thanked 8 Times in 4 Posts
"Version 1.0, 3-years ago, drew the air from between the heat shield and manifold. IATs were way too high -- 180F in the Winter! The faster warmups were nice, but detonation wasn't. v1.1 moved the tube to its current location, which is far enough away, but never broke 90F. Removing the shield allowed "v1.2" to reach 100-110F on cold days, 140F on 40F+ days (fall is a bit unpredictable). This is in combination with a rad-block and has worked well since."

RH77: Have you tried changing the gap, heat range, type of spark plugs being used to fix the detonation due to high intake temps? I had a supercharger on a toyota tacoma and the discharge temps of the s/c was so hot that it caused detonation that could only be cured with timing adjustment and/or colder heat range plugs. Just an idea.....
  Reply With Quote
Old 08-03-2009, 09:00 PM   #13 (permalink)
Certified Duct Tape Tech.
 
swoody's Avatar
 
Join Date: Feb 2008
Location: Chicago, USA
Posts: 76

Slow Ride - '00 Honda Civic DX
90 day: 46.32 mpg (US)
Thanks: 0
Thanked 0 Times in 0 Posts
I tried this same setup in my Civic, but for some reason it dropped my MPG. I just removed the flexible piping, and now I just have a large hole in the side of my intake where the cool air tube and resonator used to be, and I get much better mileage now. I figure it's pulling in warmer air from the engine bay, but not getting the extremely hot air from the headers. Seems to be a great compromise for my car
__________________
~ If you don't jump with both feet, you don't move at all ~
2000 Civic DX :: 52/50 psi :: Free Warmer Air Intake :: Duct Tape Aero
"Spare the duct tape, spoil the job."
  Reply With Quote
Old 08-11-2009, 10:33 AM   #14 (permalink)
EcoModding Apprentice
 
Join Date: Jun 2009
Location: stl
Posts: 138

rusty - '00 ford mustang coupe
90 day: 24.31 mpg (US)

cbr929 - '00 honda cbr929 fast
90 day: 39.54 mpg (US)

Porshe - '06 Kawasaki zx10r
90 day: 47.21 mpg (US)

truck - '96 ford ranger
90 day: 26.51 mpg (US)
Thanks: 5
Thanked 11 Times in 8 Posts
so what kind of gains did you guys get from wai??
  Reply With Quote
Old 02-16-2013, 05:44 PM   #15 (permalink)
EcoModding Lurker
 
Join Date: Feb 2013
Location: United States
Posts: 18
Thanks: 1
Thanked 0 Times in 0 Posts
I'm seriously looking at replacing the Cold Air Intake I've currently got on my 1991 Jeep Cherokee Laredo 4.0L (Spectre Industries Modular Tubes with Original Factory Bellows-Elbow and Amsoil Synthetic Dry Media Cone Filter) with a Donaldson G070020 Sealed Cylindrical Air Filter Housing and plumb a heat resistant duct to my replacement APN Exhaust Header in order to improve colder weather fuel efficiency. I'll try to post pics once its done.
  Reply With Quote
Old 02-20-2013, 11:04 PM   #16 (permalink)
EcoModding Lurker
 
Join Date: Jan 2013
Location: Oregon, US
Posts: 43

ZoomFreakingZoom - '88 Mazda RX7 Convertible
90 day: 19.02 mpg (US)

Geo - '96 Geo Prizm Base
90 day: 32.42 mpg (US)
Thanks: 2
Thanked 2 Times in 2 Posts
I don't quite get this mod.

Warmer air is less dense, I get that. Therefore the car would run leaner if it thought there was mroe air coming into the engine than expected based off the air flow meter. However, if I'm not mistaken, most cars have BOTH an air flow meter and an intake air temperature sensor that sends information to the ECU. So, if that were the case for this specific car, I don't see how this would help since the ECU would just correct accordingly and inject less fuel anyways.

Optimally you would want cold air going into the engine(to an extent) and the ECU to know how cold it is and how much there is to inject the correct amount of fuel.

Is there something I'm missing?
__________________
1988 rx7 convertible. Streetported, racing beat header and presilencer replacing all 3 catalytic converters. Atkins 6 port sleeves. K&N cone filter intake. 22mpg average, 27mpg max. Spreadsheet (updated regularly):
https://dl.dropbox.com/u/5310442/198...%20mileage.xls
  Reply With Quote
Old 02-20-2013, 11:06 PM   #17 (permalink)
The brake pedal is evil
 
Join Date: Jan 2013
Location: California__ Awsome: Yes
Posts: 373

Trolla - '94 Geo Prizm base
90 day: 35.82 mpg (US)

Ecomodded prizm - '94 geo Prizm Base
90 day: 37.88 mpg (US)

Dad's Corolla - '89 Toyota Corolla Base.
90 day: 29.51 mpg (US)

Denny's Detector - '08 Mercury Grand Marquis

Project E - '94 Geo Prizm Base
Team Toyota
90 day: 39.69 mpg (US)
Thanks: 4
Thanked 47 Times in 44 Posts
Heat. The engine will run richer with cold air because the ECU adds more fuel to make it so that it can burn the fuel properly since cold fuel is hard to ignite.
The hondas seem to like it at 120f, it manages the same MPG gain as lean burn if memory serves.
__________________
Getting sensor data off of a pre OBDII Toyota ECU via TDCL.
All of this is on E10: Project E is my current focus.

  Reply With Quote
Old 02-20-2013, 11:29 PM   #18 (permalink)
EcoModding Lurker
 
Join Date: Jan 2013
Location: Oregon, US
Posts: 43

ZoomFreakingZoom - '88 Mazda RX7 Convertible
90 day: 19.02 mpg (US)

Geo - '96 Geo Prizm Base
90 day: 32.42 mpg (US)
Thanks: 2
Thanked 2 Times in 2 Posts
I'm not sure I quite buy that. An engine that is already at an operating temperature of 200 degree or more is not going to have problems igniting the charge from a "cold air" intake because by the time is actually gets to the engine, it's plenty warm. Maybe this wouldn't be true if temps are down below say 40 degrees, but still I'd have to see really solid data showing good gains to believe this is beneficial.

Cold air intakes are good for both power and mpg. A denser charge is a good thing.
__________________
1988 rx7 convertible. Streetported, racing beat header and presilencer replacing all 3 catalytic converters. Atkins 6 port sleeves. K&N cone filter intake. 22mpg average, 27mpg max. Spreadsheet (updated regularly):
https://dl.dropbox.com/u/5310442/198...%20mileage.xls
  Reply With Quote
Old 02-20-2013, 11:52 PM   #19 (permalink)
The brake pedal is evil
 
Join Date: Jan 2013
Location: California__ Awsome: Yes
Posts: 373

Trolla - '94 Geo Prizm base
90 day: 35.82 mpg (US)

Ecomodded prizm - '94 geo Prizm Base
90 day: 37.88 mpg (US)

Dad's Corolla - '89 Toyota Corolla Base.
90 day: 29.51 mpg (US)

Denny's Detector - '08 Mercury Grand Marquis

Project E - '94 Geo Prizm Base
Team Toyota
90 day: 39.69 mpg (US)
Thanks: 4
Thanked 47 Times in 44 Posts
Quote:
Originally Posted by 13B_88FC View Post
I'm not sure I quite buy that. An engine that is already at an operating temperature of 200 degree or more is not going to have problems igniting the charge from a "cold air" intake because by the time is actually gets to the engine, it's plenty warm. Maybe this wouldn't be true if temps are down below say 40 degrees, but still I'd have to see really solid data showing good gains to believe this is beneficial.

Cold air intakes are good for both power and mpg. A denser charge is a good thing.[Citation needed]
My Prizm has seen a 4 MPG boost from the WAI and my average temperature is in the 70's.
When I put the CAI back on, I see it drop back down to 33 MPG.
Half the problem is that the engine has a hard time getting up to operating temperature quickly.
__________________
Getting sensor data off of a pre OBDII Toyota ECU via TDCL.
All of this is on E10: Project E is my current focus.

  Reply With Quote
Old 02-21-2013, 12:11 AM   #20 (permalink)
EcoModding Lurker
 
Join Date: Jan 2013
Location: Oregon, US
Posts: 43

ZoomFreakingZoom - '88 Mazda RX7 Convertible
90 day: 19.02 mpg (US)

Geo - '96 Geo Prizm Base
90 day: 32.42 mpg (US)
Thanks: 2
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by H-Man View Post
My Prizm has seen a 4 MPG boost from the WAI and my average temperature is in the 70's.
When I put the CAI back on, I see it drop back down to 33 MPG.
Half the problem is that the engine has a hard time getting up to operating temperature quickly.
Is that in primarily city or highway driving?

__________________
1988 rx7 convertible. Streetported, racing beat header and presilencer replacing all 3 catalytic converters. Atkins 6 port sleeves. K&N cone filter intake. 22mpg average, 27mpg max. Spreadsheet (updated regularly):
https://dl.dropbox.com/u/5310442/198...%20mileage.xls
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Warm air intake? how about warm fuel? ebacherville EcoModding Central 30 03-08-2010 10:37 PM
Comparing Warm Air Intakes (WAI) & Cold Air Intakes (CAI) toomuch EcoModding Central 22 04-07-2009 10:30 PM
Grill block affected milleage mar5ka Aerodynamics 24 08-31-2008 11:17 AM
Moving air intake into the engine compartment? pasadena_commut Aerodynamics 5 07-25-2008 04:24 PM
carbed car .. think a warm air intake will help? ebacherville EcoModding Central 21 06-29-2008 10:16 AM



Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com