As title states its a stock b18b1 with I/H/E
89 civic sedan obd1 p75
My afr for idle is at 14.6-14.7
What would be best for WoT? Looking for more hp.
Sorry no dyno in our area looking for opinions
So we just street tune

Thanks in advance

 

For something like this 13.5-13.3 would probably be around ideal. Some cars like it richer like 12.9, others like it leaner in the 13's.. really depends

12.9-13.5 is a fine targert to shoot for.

 

Thanks for the reply ddtech! What I needed

 

i used to run a stock ls at 13.5-13.7 wot with stock timing and 93 octane. it never had any issues and ran for tens of thousands of miles through multiple owners. honestly tho id shoot for a little richer, right around 13.3

 

12.8:1 - 13.2:1 is usually the sweet spot in power and reliability for an all motor setup at WOT. You can gain throttle response and pick up some power leaning out more in 1st and 2nd gear usually up to 13.5:1.

Idle at full temperature 14.7:1 is stoichiometric. 5th gear cruising with minimal load can be leaned out to even 15.5:1 but anything leaner than 14.7:1 produces a large amount of NOx and sometimes with minimal MPG increases. Shoot for 14.5:1 cruising and it will be fine.

 

thanks for the reply. We got only 91 octane in our area.so probably go with the richer side? and maybe 18 degree ignition timing

ill just keep testing and tuning at those afr to see which makes power more.
I hit 15.4 at the track want to see if I can get to 15.0-15.2 with just fine tuning.

In our area since its just a small island. our max mph is 45 so I cruise in 5th gear right around 2k rpm. Shifting a 2k-2500 rpm. so 14.5:1 is what I should be aiming for?