Ports/Valve buildup pic at 117k miles. Inside intake also.
04-14-2018, 04:46 PM
#11
10 Second Truck Club
I'd be curious to see what mine look like now that I'm at 10K.
I've had AFM disabled most of the time and since I have a wideband and HPT, I logged WOT and they run like a solid 10:1 air/fuel ratio wide open. I changed mine to run closer to 12:1 at WOT.
I've had AFM disabled most of the time and since I have a wideband and HPT, I logged WOT and they run like a solid 10:1 air/fuel ratio wide open. I changed mine to run closer to 12:1 at WOT.
04-19-2018, 12:17 PM
#12
Man that's rich, I watched a dyno video of an intake swap on one of these trucks and they saw as low as 9.x:1 if I remember correctly with the stock intake setup and it leaned out a hair with the cold air. I need to ask my tuner if he leaned mine out a bit.
04-19-2018, 01:24 PM
#13
10 Second Truck Club
I'd like to see how yours compares.
Man that's rich, I watched a dyno video of an intake swap on one of these trucks and they saw as low as 9.x:1 if I remember correctly with the stock intake setup and it leaned out a hair with the cold air. I need to ask my tuner if he leaned mine out a bit.
Man that's rich, I watched a dyno video of an intake swap on one of these trucks and they saw as low as 9.x:1 if I remember correctly with the stock intake setup and it leaned out a hair with the cold air. I need to ask my tuner if he leaned mine out a bit.
Adding an intake shouldn't stop it from seeking out that same mixture...
04-20-2018, 12:50 PM
#14
On the gen5 motors there is a table in the power enrichment section (think it's eq ratio) that is your commanded air/fuel mixture at wot. It's set to command a pretty rich mixture, so fixing air fuel is as easy as adjusting this to command a leaner mixture at wot. I have a wideband to confirm it, but once commanded to say 12:1 it will learn and run 12:1.
Adding an intake shouldn't stop it from seeking out that same mixture...
Adding an intake shouldn't stop it from seeking out that same mixture...
I hear ya, based on that info it shouldn't. They ran the test immediately after installing it so it probably hadn't had enough time to learn and adjust.
04-22-2018, 08:09 AM
#15
On the gen5 motors there is a table in the power enrichment section (think it's eq ratio) that is your commanded air/fuel mixture at wot. It's set to command a pretty rich mixture, so fixing air fuel is as easy as adjusting this to command a leaner mixture at wot. I have a wideband to confirm it, but once commanded to say 12:1 it will learn and run 12:1.
Adding an intake shouldn't stop it from seeking out that same mixture...
Adding an intake shouldn't stop it from seeking out that same mixture...
in open loop it probably just makes an educated guess based on maf reading. Likely fine if you’re stock, but not fine if your not stock.
04-22-2018, 01:03 PM
#16
10 Second Truck Club
I'd agree but I don't know if just an air intake is going to make that drastic of a change.
04-22-2018, 04:43 PM
#17
Open loop fueling is usually programmed and not adjusted/read, since it is open loop. So under WOT an increase in air is going to lean the mixture.
04-22-2018, 06:03 PM
#18
10 Second Truck Club
Cold airs on these trucks see about 15-20 hp back to back on the dyno. The change is fairly drastic. I've seen them tested in videos and spoke to my tuner who also has tested it back to back on the dyno.
Open loop fueling is usually programmed and not adjusted/read, since it is open loop. So under WOT an increase in air is going to lean the mixture.
Open loop fueling is usually programmed and not adjusted/read, since it is open loop. So under WOT an increase in air is going to lean the mixture.
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