hey whats up I have a stock gsr in a eg hatch with only headers and intake


so i have hondata s300 and a AEM wideband does anyone know what the AFR should be?

when its at 17.4 feels great and pulls hard but when i get it to run at 15.1 it feels like a single cam?

so could use anying info thanks

 

What kind of fuel are you using?

Google is your best friend.. A quick search will yield answers for ya.

 

i run 93 and i got it to run around 14.2 but when im on it hard it leans out to 10.00 how do i richen that

 

you have that backwards 10 would be way rich

 

under full throttle u should b anywhere from 12-13.3:1, under part throttle u should be at 14.7:1 You pull up the fuel tables and add/subtract fuel to the desired ratio. You do have the aem wired into ur ecu right? casue u should

 

hey no i didnt wire it to my hondata ecu but im going to do that today, so lower the number mean RICH (more fuel) and higher the number mean lean (more air)

 

14.7:1 The one in this equation is the one part of fuel, the 14.7 is 14.7 parts of air which means if u had one ounce of fuel u would have 14.7 ounces of air to get a air/fuel ratio of 14.7:1

 

oh thanks i understand now so for say when i punch on it and it reads 10.3 it means its 10.3 of air to 1 fuel meaning 10.3.1 which is to much fuel for the amont of air?

and also how when i change my idle a/f it was 17.2 so i took it to 14.2.1 but my idle went from 1000rpm to like 1600rpms?

 

You could have a Vacuum leak or your IACV may not be working properly????? Or you may be changing the wrong parameters to make the changes to your AFRs. You should not be changing the main fuel cells in the fuel table before you have your injectors dialed in properly.

 

you can pull up a stock map and change for injectors than pull the tables up and adjust accordingly. Check the timing, dont forget to do the timing setup in hondata. Check ur duty cylcle for the iacv located in perematers somewhere. The idle area to me is always the hardest to tune