HAI in altima ??? - Fuelly Forums

Click here to see important news regarding the aCar App

Reply
 
Thread Tools Display Modes
 
Old 08-12-2006, 06:14 PM   #1
Supporting Member
 
lovemysan's Avatar
 
Join Date: Jun 2006
Posts: 595
Country: United States
HAI in altima ??? updated with pics

A friend of mine inspired by my recent gas saving antics, fabbed a really nice HAI. Initially he noticed a increase in mileage before settling back down. He was averaging 28mpg 70% highway. After the HAI he was able to get 30.9mpg. It had not been in the 30s for a long time (33mpg all time high). After the initial spike it settled into the 28s again.

The car is a 98 altima, 5 spd, he uses the air light to moderate. Of course the spike could have been a fluke, but I think that most likely the car ran lean initially and the computer re trimmed the fuel.

My question, could you get or trick the ecm to take advantage of the hot air?

For my saturn 200 deegrees is the highest effecient HAI temp, any suggestions for a nissan?








__________________

__________________
02 Saturn SL
5 speed
for pics click the link below

https://s75.photobucket.com/albums/i3...emysan/saturn/

[SIGPIC][/SIGPIC]
"for best mileage swap in a d15z1"
lovemysan is offline   Reply With Quote
Old 08-12-2006, 06:17 PM   #2
*shrug*
 
Join Date: Sep 2005
Posts: 6,195
Country: United States
i imagine the nissan is clever enough to retard ignition to counter the affects of the hot air, which is prolly what's happening. if he wants to get wicked mileage have him pick up a scangauge!
__________________

SVOboy is offline   Reply With Quote
Old 08-12-2006, 11:30 PM   #3
Registered Member
 
Compaq888's Avatar
 
Join Date: Oct 2005
Posts: 1,460
Country: United States
Quote:
Originally Posted by lovemysan
A friend of mine inspired by my recent gas saving antics, fabbed a really nice HAI. Initially he noticed a increase in mileage before settling back down. He was averaging 28mpg 70% highway. After the HAI he was able to get 30.9mpg. It had not been in the 30s for a long time (33mpg all time high). After the initial spike it settled into the 28s again.

The car is a 98 altima, 5 spd, he uses the air light to moderate. Of course the spike could have been a fluke, but I think that most likely the car ran lean initially and the computer re trimmed the fuel.

My question, could you get or trick the ecm to take advantage of the hot air?

For my saturn 200 deegrees is the highest effecient HAI temp, any suggestions for a nissan?
I used to own a 99 altima. It's the same car only a year younger than your friends's car. Tell him he's wasting time with HAI, CAI, WAI's. The only way to get better mileage is with the stock airbox and a Nissan Air filter, not fram, but the air filter from the dealer.

Look in my garage(gassavers garage) for my altima. Do everything to his car what I did and he is guranteed 31mpg mixed driving. Freeway should be about 38-40mpg.
__________________

Compaq888 is offline   Reply With Quote
Old 08-13-2006, 11:06 AM   #4
Supporting Member
 
lovemysan's Avatar
 
Join Date: Jun 2006
Posts: 595
Country: United States
Well he moved the iat into the intake air stream. I think I'll have him move it away from the hot air.
__________________
02 Saturn SL
5 speed
for pics click the link below

https://s75.photobucket.com/albums/i3...emysan/saturn/

[SIGPIC][/SIGPIC]
"for best mileage swap in a d15z1"
lovemysan is offline   Reply With Quote
Old 08-13-2006, 07:34 PM   #5
Supporting Member
 
lovemysan's Avatar
 
Join Date: Jun 2006
Posts: 595
Country: United States
This afternoon he wrapped the o2 sensor with foil and I pulled iat sensor and laid it on top of the driver side headlight. He tells me after 95 miles he is seeing a signifigant power loss(yay!) and the mileage is substantially better, he is thinking 5mpg or so. Cross your fingers, will see if the ecm relearns to ineffecient. Might as well nock on wood too!
__________________
02 Saturn SL
5 speed
for pics click the link below

https://s75.photobucket.com/albums/i3...emysan/saturn/

[SIGPIC][/SIGPIC]
"for best mileage swap in a d15z1"
lovemysan is offline   Reply With Quote
Old 08-13-2006, 07:42 PM   #6
*shrug*
 
Join Date: Sep 2005
Posts: 6,195
Country: United States
Poor o2 sensor.
SVOboy is offline   Reply With Quote
Old 08-13-2006, 07:52 PM   #7
Registered Member
 
Compaq888's Avatar
 
Join Date: Oct 2005
Posts: 1,460
Country: United States
I give up.
__________________

Compaq888 is offline   Reply With Quote
Old 08-19-2006, 08:20 AM   #8
Supporting Member
 
lovemysan's Avatar
 
Join Date: Jun 2006
Posts: 595
Country: United States
Quote:
Originally Posted by SVOboy
Poor o2 sensor.
Wouldn't you like to sport some phat reynolds wrap wear. Gotta sport the bling bling.
__________________

__________________
02 Saturn SL
5 speed
for pics click the link below

https://s75.photobucket.com/albums/i3...emysan/saturn/

[SIGPIC][/SIGPIC]
"for best mileage swap in a d15z1"
lovemysan is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Average mileage wrong species5618w Fuelly Web Support and Community News 7 02-23-2014 01:55 PM
How some 9 pound alloys changed my life SVOboy General Fuel Topics 43 08-11-2006 03:41 PM
Any FE info on Mazda Miatas? LincolnW General Fuel Topics 1 07-07-2006 07:51 AM
Reasons for picking a fuel efficient car Matt Timion Automotive News, Articles and Products 0 09-21-2005 12:30 PM

» Fuelly iOS Apps
No Threads to Display.
Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 06:20 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.