What's your idle AFR ?

Your premier source for information on the Turbo KA: KA24E-T and KA24DE-T (KA with aftermarket turbo kit)!
gyfer
Posts: 395
Joined: Mon Oct 14, 2002 7:30 pm

Post

Just bought a Wideband O2.Trying to learn about tuning.Mine says 12.3 at idle... I would say that's wong.

What's your AFR during idle ??


crzycav86
Posts: 3836
Joined: Tue Aug 05, 2003 1:28 pm
Car: 93 Nissan 240SX KAT

Post

what are you using for tuning? safc?

KATwo40
Posts: 1761
Joined: Tue Feb 01, 2005 9:40 am
Car: 1993 240sx KA-T

Post

Mine is 14.7-ish @ idle.

gyfer
Posts: 395
Joined: Mon Oct 14, 2002 7:30 pm

Post

I use Emanage.

How about everyone else ? Give me your AFR @ idle !! Don't be shy

SeanC
Posts: 367
Joined: Mon Mar 20, 2006 2:35 pm
Car: 1993 240sx SE

Post

high 14's low 15's is perfect for idle and cruising. then at WOT look for 11's with a turbo and 12.5-13.2 for n/a.

MarkEmark
Posts: 1857
Joined: Sun Aug 25, 2002 6:25 pm
Car: fully-built '95 240sx KA-T
Contact:

Post

gyfer wrote:Just bought a Wideband O2.Trying to learn about tuning.Mine says 12.3 at idle... I would say that's wong.

What's your AFR during idle ??
Yah, that's definitely too rich. Even with a JWT ECU, I'm running between 14.7:1-15.2:1 at idle.

Cruising at full vacuum, it's 20:1

Florida240sx
Posts: 11114
Joined: Thu Jul 01, 2004 7:17 am
Car: 1993 Nissan 240SX Hatch 5spd
2012 Nissan Altima S coupe 2.5
Location: DeLand FL

Post

My idle is like 11-12 as well. Your idle should be 14.7 Anything between 14-14.7 will be fine. My first setup i was able to tune it and I had it at 14.5 Now with my 555cc's I can't get it above 13.

User avatar
Chezedik
Posts: 4726
Joined: Tue Dec 17, 2002 8:35 pm
Car: 1991 Nissan 240sx

Post

Idle can be as high at 36:1, there is no need for full enrichment without boost conditions. I would say 20-25:1 is more than safe if not too rich.

1WheelWonder
Posts: 961
Joined: Wed Jan 19, 2005 11:16 am
Car: 1991 Nissan 240sx

Post

I sit at around 14.5-15.5 at idle and cruise with 550cc Deatchwerk injectors and SafcII, soon to be Enthalpy tuned.

User avatar
DammitBobby
Posts: 1431
Joined: Fri May 02, 2003 5:41 am
Car: S13 91 KA24DET
Contact:

Post

Car wont idle at 19 to 1. That is what JWT 72lbs reads. I had to add 30% fuel to get the car to idle around 14.7. You don`t want to have stall issues after boosting. It will fry your turbo bearings. Ask me how I know.

gyfer
Posts: 395
Joined: Mon Oct 14, 2002 7:30 pm

Post

That's for the input guys.

How cruising at constant speed, say 70mph ??

User avatar
Chezedik
Posts: 4726
Joined: Tue Dec 17, 2002 8:35 pm
Car: 1991 Nissan 240sx

Post

That just comes from my recent experience with helping to tune a K-pro, it idles fine while logging a constant 38:1. But it could just be having trouble reading, who knows.

User avatar
Jookmasta
Posts: 5172
Joined: Fri Apr 18, 2003 3:26 pm

Post

well initial startup presents 18:1 or 17:1 but then when the engine is warmed up, 15:1 or so...........this is with the enthalpy tune....

BillKlineVT
Posts: 78
Joined: Tue Jul 05, 2005 10:23 am

Post

lol at 38:1 what mileage do u get, 300 mpg? sounds like whatever wideband ur using is broken if you're seriously getting 38:1... ur car should start to buck at anything leaner than 17-18:1, if not before that. I idle between 15 and 16 most of the time

180sx
Posts: 230
Joined: Thu May 08, 2003 3:25 pm

Post

well yah 14-15 at idle and cruise. 12 in boost otherweise ur idle is a waist of gas ...1thing to watch is motor has to be fully warmed up cuz u have self learn function ecu ussses as well as warm up enhacements.

and there isn't a replacement for displacement by the way.....3.5l turbo will smoke a 2.5l turbo motor just like ka's kill sr and ca'a if you look at it that way

gyfer
Posts: 395
Joined: Mon Oct 14, 2002 7:30 pm

Post

Thanks for the input and reading my signature

I repeat, if you think there's no replacement for displacemnt, you don't know anything about physics and chemistry.

Peace


Return to “KA24ET / KA24DET Forum”