13.1-13.7 on the afr gauge too lean? help

[snowrules]

I have an 06 apex that I am trying to get the fuel dialed in. I have an aem air fuel gauge installed to help me set it up. I am also running a hauck fuel controller. I started this weekend with a gutted exhaust modded lower air box and fix ram air lid. took it out and it had a bad lean spot from about 7700-8900 rpm running 13.2-13.7 on the afr gauge also lean at wot running 10700 rpm gauge was reading 13.1-31.2. this was with the hauck controller maxed out for more fuel at all the settings. Thought maybe the controller just couldn't add enough fuel so removed the gutted exhaust retested. a little better but still at 7700-8900 rpm it ran13.2-13.4 and at wot it ran 13.1-13.3 again with all settings at full fuel on the controller. then removed the cut lower air box and retested still ran 13.2-13.4 between 7700-8900 rpm and 13.1-13.2 wot with the fuel settings maxed out. then ran it with just the ram air lid again with all fuel settings at stock because the consensus is that you can run a ram air lid without even adding a fuel controller got even leaner 13.2-13.7 at 7700-8900 rpm and 13.2-13.3 at wot 10700 rpm. then i put the stock lid back on so now the sled was totally stock no air box mods no exhaust mods set the fuel settings to stock and again sled ran 13.2-13.7 at 7700-8900 rpm and 13.1-13.2 at wot 10700 rpm. in all the research i've done here everyone says that 13.0- 13.1 is about as lean as you want to go if you want to hold it there for long so question is why in stock form is it running that lean at 7700-8900 rpm which is right around cruising speed and wot where you would hold it for long periods of time? could it be my hauck controller is not working properly? i thought it should have enough adjustment to add an air box mod and exhaust. has anyone else put an afr gauge on a stock sled and seen numbers that lean? if so i assume it's ok to run it at 13.1-13.7 because thats how it comes stock. any input would be great I am scratching my head and chasing my tail on this one guys thanks in advance.

 

[Turk]

Running a/f,s in the 13,s in the mid range on a stock sled is fine. Even my turbo will run mid-low 13,s & has no issues.
Your good to go at those a/f ratios.

 

[snowrules]

ok what about at wot? still ok? and by stock sled do you mean non turbo or sced? still ok for those numbers running air box mods and an exhaust? thanks for the help turk

 

[snowrules]

bump

 

[snowrules]

anyone know why the fuel controller can't add enough fuel to get the ratios down into the mid 12's ? anyone know what percentage over stock the hauck controller is able to add?

 

[mbarryracing]

i'd be looking at the Fuel Pressure at WOT, maybe a weak fuel pressure regulator that can't maintain...
You could also have a defective controller that isn't actually adding any additional fuel, could explain why there isn't a change in AFR with change in program settings. Seen this on a boosted application before, after it was too late.

With a controller, you should be able to make it so rich that the sled huffs sooty black exhaust...

 

[Turk]

You have to go thru a proper cycling to keep the changes you make on your controller otherwise it reverts back to stock. Make sure your locking in the changes you make. It should be in the directions.

 

[snowrules]

ya that's what i figured about being able to make it really rich mbarry. also didn't see anything in the instructions about locking it turk but it seemed like it was holding my settings cause when i'd go back to adjust it the lights were in the same position i had set them in not all back at 1. what do you mean by proper cycling ?

 

[snowrules]

anyone know if there is a way to test the controller to see if it's working properly? gonna call hauck today and ask them

 

[mbarryracing]

if the Hauck controller is similar to the Dobek style that FPP uses, then there is no additional locking or cycling once you land on the light setting you want. It maintains the last light until you change it again.
No way to test a controller other then the way you already are with your AFR gauge.
Hauck will gladly sell you another one, though.

 

[snowrules]

hahaha ya i'm sure they would. i'm leaning towards the controller is not working properly. i have a PC3 on my other apex and was able to get the afr in the mid to high 12's weet spot the whole way through so i may just go that route instead for the added accuracy and adjustability.

 

[snowrules]

problem solved just ordered a Power commander 5 lol merry christmas to me hahaha