A/F controller pros and cons? - D-series.org

Go Back   D-series.org Motor Mayhem & Suspension Satisfaction Engine Management

D-Series.org is the premier Honda All Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 12-07-2005, 07:10 PM   #1 (permalink)
D-series soldier
 
iTrader: (7)
Join Date: May 2005
Posts: 560
Rep Power: 15 strykersd is almost a somebodystrykersd is almost a somebodystrykersd is almost a somebodystrykersd is almost a somebody
iTrader Score: 7 reviews
Default A/F controller pros and cons?

Hey guys, i was just talking to a friend who moved about 150miles away to go to college, he still comes down about once a month to visit his parents. Lately he's been looking into good gas milage and he came to me for help. One idea we had was a air/fuel controller, like the Apexi SAFC. He figured it'd be worth it since it can add a few hp and also be set to save gas on long drives, well with the help of an air to fuel ratio gauge. So far his engine is stock other then an short ram intake. My question is, can it really help with gas milage on our 1.6L engines? Oh yeah, forgot to mention, his car's a Sentra, not a civic, but I would guess it wouldn't be too different. Anyone run one of these in there NA D-series engines? Does leaning out the air/fuel ratio a bit help with gas mileage? Thanks guys

Patrick
97 Civic LX
strykersd is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 12-08-2005, 06:24 AM   #2 (permalink)
allwheeldriveturboboxer
 
builthatch's Avatar
 
iTrader: (5)
Join Date: Sep 2003
Location: DEEEEP southern NJ
Posts: 2,469
Rep Power: 26 builthatch is the fucking MAN!!!!builthatch is the fucking MAN!!!!builthatch is the fucking MAN!!!!builthatch is the fucking MAN!!!!
builthatch is the fucking MAN!!!!
iTrader Score: 5 reviews
Send a message via AIM to builthatch
Default

Quote:
Originally Posted by strykersd
Hey guys, i was just talking to a friend who moved about 150miles away to go to college, he still comes down about once a month to visit his parents. Lately he's been looking into good gas milage and he came to me for help. One idea we had was a air/fuel controller, like the Apexi SAFC. He figured it'd be worth it since it can add a few hp and also be set to save gas on long drives, well with the help of an air to fuel ratio gauge. So far his engine is stock other then an short ram intake. My question is, can it really help with gas milage on our 1.6L engines? Oh yeah, forgot to mention, his car's a Sentra, not a civic, but I would guess it wouldn't be too different. Anyone run one of these in there NA D-series engines? Does leaning out the air/fuel ratio a bit help with gas mileage? Thanks guys

Patrick
97 Civic LX
interesting idea, but, IMO

driving style would have a better impact than playing with a safc...if you drive conservatively, and keep your car is a good tune with good tire pressures and the least amount of junk (weight) in the car, you should be pretty darn close to the peak efficiency of the setup. i am not saying its not possible to gain mpg with tuning the fuel curve from stock, but the stuff involved to do it correctly i think would outweigh the gains, if any were even to be found. if i were to attack something like this, i would also want timing controls too and a higher resolution fuel controller.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

builthatch is offline   Reply With Quote Quick reply to this message
Old 12-08-2005, 05:00 PM   #3 (permalink)
D-series soldier
 
iTrader: (7)
Join Date: May 2005
Posts: 560
Rep Power: 15 strykersd is almost a somebodystrykersd is almost a somebodystrykersd is almost a somebodystrykersd is almost a somebody
iTrader Score: 7 reviews
Default

Yeah, he does that, but he's mostly looking for the best mileage on long drives. I believe he already does the rest, like high tire pressure etc. We got the idea from looking at a site on the 3 stage vtec D-series heads, it said something bout how on the lowest cam profile (low RPMS) it runs air to fuel ratios as lean as 20:1 . Thanks

Patrick
97 Civic LX
strykersd is offline   Reply With Quote Quick reply to this message
 
Old 12-08-2005, 06:39 PM   #4 (permalink)
allwheeldriveturboboxer
 
builthatch's Avatar
 
iTrader: (5)
Join Date: Sep 2003
Location: DEEEEP southern NJ
Posts: 2,469
Rep Power: 26 builthatch is the fucking MAN!!!!builthatch is the fucking MAN!!!!builthatch is the fucking MAN!!!!builthatch is the fucking MAN!!!!
builthatch is the fucking MAN!!!!
iTrader Score: 5 reviews
Send a message via AIM to builthatch
Default

Quote:
Originally Posted by strykersd
Yeah, he does that, but he's mostly looking for the best mileage on long drives. I believe he already does the rest, like high tire pressure etc. We got the idea from looking at a site on the 3 stage vtec D-series heads, it said something bout how on the lowest cam profile (low RPMS) it runs air to fuel ratios as lean as 20:1 . Thanks

Patrick
97 Civic LX
ahh...ic.

with such lean-burn conditions like the vtec-e deal, so many things are more important than ever- first is port design (and CC to an extent) for incredible swirl to atomize like nothing else and a close second is timing, which is uuuber CRITICAL...that's stuff you don't have control of unfortunately with the vafc.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

builthatch is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the D-series.org forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On


iconAll times are GMT -8. The time now is 05:41 PM. | Welcome to Forum, please register to access all of our features.