Super AFC Area is for discussing the Apexi Super AFC

Old school 5-knob SAFC: target AFRs?

Old 07-28-10, 05:59 AM
  #1  
Senior Member
5 Year Member
Thread Starter
iTrader: (1)
 
soldave's Avatar
 
Join Date: Jan 2010
Location: Okinawa, Japan
Posts: 249
Likes: 0
Recieved 0 Likes on 0 Posts
Old school 5-**** SAFC: target AFRs?

Just got myself an AEM wideband and have picked up a 5-**** "older than time itself" SAFC and plan to do a a bit of very basic and mild fuel tuning on my 1991 S5 Tii FC. Don't have any major engine mods; in fact I've just got the emissions stuff removed, full intake & exhaust, stock & freshly cleaned injectors and a full tune-up. Have also done a complete rewire of the fuel pump to a straight relay and removed the variable resistor so I know it's going to be running rich.

The 5-**** SAFC just has 5 rpm levels at which to adjust the fuelling (800, 2400, 4000, 5600 and 7200rpm), and can adjust up to 30% either way of stock. Am probably going to do my tuning for 4000, 5600 and 7200 at WOT and will probably take a reading for 2400 at WOT and also when cruising too. Was wondering what I should be aiming for in terms of a little leaner but still safe AFRs. Am not going to be boosting much above 10psi (12psi would be an absolute and unlikely maximum).

Idle & WOT AFR thoughts would be appreciated
soldave is offline  
Old 08-03-10, 12:14 PM
  #2  
10th AE
 
Join Date: May 2010
Location: Edmonton, AB, Canada
Posts: 25
Likes: 0
Recieved 0 Likes on 0 Posts
I have the exact same safc 5 *** on my 88. It was put in by the previous owner and I'm somewhat lost with it. Any clarification on the different settings on it would be great(tips for performance etc.)
Pullout1979 is offline  
Old 05-10-11, 04:28 PM
  #3  
Jackstand Drifter
5 Year Member
iTrader: (10)
 
Osirus9's Avatar
 
Join Date: Dec 2006
Location: Chicago, IL
Posts: 1,065
Likes: 0
Recieved 0 Likes on 0 Posts
safe AFRs at WOT on a turbo are between 10 and 12. a good cruising AFR is 13. These AFRs are conservative, but with a setup like that you don't want to get anywhere near the hairy edge of the fuel curve.
Osirus9 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Einheri
Single Turbo RX-7's
14
10-07-15 12:23 PM
93FD510
New Member RX-7 Technical
2
10-01-15 02:00 PM
Devon Murray
Introduce yourself
2
09-25-15 09:41 AM


Thread Tools
Search this Thread
Quick Reply: Old school 5-knob SAFC: target AFRs?


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.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: