Air fuel ratio - Honda Civic Forum

Go Back   Honda Civic Forum > Honda Civics by Generation > 7th Generation Civic > Advanced Engine Performance and Swaps


Advanced Engine Performance and Swaps Post information/questions about Forced Induction, Nitrous, Engine Building and Swaps here.


Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 09-05-2007   #1
Jza
Registered!!
 
Join Date: Aug 2007
Location: Ottawa
Age: 26
Posts: 338
Rep Power: 114
Jza is a jewel in the roughJza is a jewel in the roughJza is a jewel in the roughJza is a jewel in the rough
Send a message via MSN to Jza
Air fuel ratio

What is the ideal air/fuel ratio? I've heard figures like 10 parts air, 1 part gas. Is this correct? What is the air/fuel ratio given off by a completely stock engine?
__________________
Jza is offline   Reply With Quote
Old 09-05-2007   #2
Jap-Euro Fusion
Hey! Look At Me!! I'm a Supporting Member!!
iTrader: (16)
 
Boilermaker1's Avatar
 
Join Date: Jul 2002
Location: Washington DC
Age: 34
Posts: 13,140
Images: 8
Rep Power: 306
Boilermaker1 is a splendid one to beholdBoilermaker1 is a splendid one to beholdBoilermaker1 is a splendid one to beholdBoilermaker1 is a splendid one to beholdBoilermaker1 is a splendid one to beholdBoilermaker1 is a splendid one to beholdBoilermaker1 is a splendid one to beholdBoilermaker1 is a splendid one to beholdBoilermaker1 is a splendid one to beholdBoilermaker1 is a splendid one to beholdBoilermaker1 is a splendid one to behold
Re: Air fuel ratio

14.7:1 is complete combustion (everything is expended). You dont want to run that high under load, as you want some factor of safety set into the system, NA, I think you could get away with High 12s at WOT, under boost, you want mid 11s
__________________
2002 Civic
Closet Built... 236.7 HP, 187.3 ft-lb

http://www.civicforums.com/forums/19...-car-sale.html

2008 Audi A3 2.0T S-Line
Boilermaker1 is offline   Reply With Quote
Old 09-08-2007   #3
Jza
Registered!!
 
Join Date: Aug 2007
Location: Ottawa
Age: 26
Posts: 338
Rep Power: 114
Jza is a jewel in the roughJza is a jewel in the roughJza is a jewel in the roughJza is a jewel in the rough
Send a message via MSN to Jza
Re: Air fuel ratio

So complete combustion is 14.7 parts air and 1 part gas. But idealy, you want 12 parts air and 1 part gas at WOT (wide open throttle)?
__________________
Jza is offline   Reply With Quote
Old 09-08-2007   #4
My Pony Princess is the inspiration for my ride.
iTrader: (17)
 
speedfoos's Avatar
 
Join Date: Apr 2006
Age: 40
Posts: 5,187
Rep Power: 0
speedfoos is an unknown quantity at this point
Re: Air fuel ratio

For boost or NA?
speedfoos is offline   Reply With Quote
Old 09-08-2007   #5
Jza
Registered!!
 
Join Date: Aug 2007
Location: Ottawa
Age: 26
Posts: 338
Rep Power: 114
Jza is a jewel in the roughJza is a jewel in the roughJza is a jewel in the roughJza is a jewel in the rough
Send a message via MSN to Jza
Re: Air fuel ratio

Both
__________________
Jza is offline   Reply With Quote
Old 09-28-2007   #6
Turbo Guru
iTrader: (14)
 
andyman97's Avatar
 
Join Date: Oct 2002
Location: Rockville, MD
Age: 36
Posts: 4,077
Rep Power: 232
andyman97 has a reputation beyond reputeandyman97 has a reputation beyond reputeandyman97 has a reputation beyond reputeandyman97 has a reputation beyond reputeandyman97 has a reputation beyond reputeandyman97 has a reputation beyond reputeandyman97 has a reputation beyond reputeandyman97 has a reputation beyond reputeandyman97 has a reputation beyond reputeandyman97 has a reputation beyond reputeandyman97 has a reputation beyond repute
Send a message via AIM to andyman97 Send a message via Yahoo to andyman97
Re: Air fuel ratio

12 anything :1 is uber rich. You won't make power that rich. I'd say mid-high 13's would be good under n/a apps. Mid-low 11's is ideal for boost, gives a good cushion of safety.
__________________
02 Civic d17a2 turbo
490 whp/360 tq @ 31 psi

-If you pm me and I don't respond, it's because, either:

a) Your question is stupid
-or-
b) it can be found by searching if you'd quit being lazy
andyman97 is offline   Reply With Quote
Old 09-28-2007   #7
7thgen Power Maker
iTrader: (74)
 
dezod's Avatar
 
Join Date: Sep 2003
Location: Buffalo, NY, US
Posts: 9,060
Images: 57
Rep Power: 0
dezod is a splendid one to beholddezod is a splendid one to beholddezod is a splendid one to beholddezod is a splendid one to beholddezod is a splendid one to beholddezod is a splendid one to beholddezod is a splendid one to beholddezod is a splendid one to beholddezod is a splendid one to beholddezod is a splendid one to beholddezod is a splendid one to behold
Send a message via AIM to dezod
Re: Air fuel ratio

12's:1 on an N/A all motor app should be fine. That will allow for some buffer of bad gas and top end runs.
dezod is offline   Reply With Quote
 
 
Reply

Similar Threads
Thread Thread Starter Honda Civic Forum Replies Last Post
P0134 OBD-II code. Any luck buying Denso 234-9017 on Amazon? juror Mechanical Problems/Vehicle Issues and Fix-it Forum 5 05-26-2015 06:35 PM
1998 transmission, gear ratio cruisers10 6th Generation Civic 1 05-12-2015 10:46 PM
what to put in gauge pods AFlyer Parts and Products 2 03-04-2002 05:09 PM
need pillar holder Booohahaha Parts and Products 1 01-20-2002 12:03 PM
Air to Fuel Ratio. 02Si General Honda Civic Forum Archive. 3 01-01-2002 11:30 AM


Tags
06, af, air, b16, boosted, civic, fuel, honda, ideal, motor, na, ratio, ratios, si, turbo

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 On
Pingbacks are On
Refbacks are On

 

All times are GMT -5. The time now is 07:55 PM.
 
vBulletin Skin by ForumTemplates.com
 

All Content Copyright 2007 CivicForums.com