Good luck indeed Duke, I'll be sure to keep an eye out for the results.

I ordered a set of telescopic gauges so I can exactly measure the ID of my AF1 tube, no more guess work! If its a 3.0", 3.5" here I come! If it is indeed a 3.25" I'll try running the new tune.

I'm curious to see your final #s....

-NCSU

 

Well I have the 3.5" tube, now I just need the 3.5" air filter. Apparently the filter for the 3.5" tube has a narrower diameter.

So I'll mess with that when it comes later this week. As for a dyno, I'll try and do it this weekend. However, I have some very serious family matters that have been taking a lot of my time and thus tuning is not a top priority.

Since I have the 3.0" AF1 on now I decided to go back to the stock tune and try it out.

I noticed a HUGE change in the shifts and a significant change in power throughout the RPMs.

I've also narrowed down what I think is the source for the trq lockup in out deal I have at light throttle on the highway. It's still doing it with the stock tune! I originally thought it was a tuning deal but now I actually believe it to be the AF1 intake.

When talking to Mike, one of the things he brought up was the baffles on the stock intake and how they create pressure once filled with air and some how (I forgot the exact words he used) but serve as a way to force air into the engine faster at speed.

I think this is why I'm in an out of trq lock up more then I was with the stock intake and stock tuning. I mean everything is the same now as before with the exception of the AF1.

I'm not saying it's a bad thing, just something I notice. It isn't my favorite side effect but it's definitely worth it when I feel the difference the AF1 makes in acceleration and WOT.

It's just a little give and take.

Duke

 

(webmaster note: post in violation of Vendor rules removed - https://www.f150online.com/forums/forumrules.html)

 

Hey Casey,

I'm swamped at work this week and then need to spend some time with my girlfriends family over the weekend. Her brother's brain cancer came back a month ago and doctors reviewed his scans last week and told them he only has a few weeks left. Needless to say it's been an overwhelming and stressful time.

I probably won't be able to make it to the dyno until next week. I'll give you guys a call when I know more on Monday or Tuesday.

Thanks again,

Duke

 

geez that's tough man

 

Yeah it's been a rough few weeks. Pair that with the 80 hour work week I've had this week and 75 from last week and I'm a little wore out.

Duke

 

P0171 - system too lean in bank 1.

I just installed the 3.5" AF1 on my truck with the 92 oct high perf tune that was built for the 3.25" intake. We were wondering if my truck was just one to react rich as well as having the difficulty of running a 3.00 on a 3.25 tune.


I'm not really seeing a point a to dynoing now without adjusting for the A/F in advance. Especially when I'm pulling lean codes.

I'll give Mike a call on Monday morning and see if I can get an adjusted fuel strategy for the 3.5" so we have a better chance of being accurate on the dyno this week.

Duke

PS. I'll do some quick A/F data logging on the XCal2. Granted it won't be extremely accurate but we'll have an idea as to how lean we're talking. IE. Hopefully not so lean it's hurting something.

 

Well I thought you could data log the A/F ratio in the XCal2 but I guess I was wrong. I didn't see where that was an option last night.

Either way I cleared the code and it pulled lean again on the way to work this morning. I have already boxed up the other AF1 and it'd be a PITA to get it back out and have to uninstall the 3.5".

I called TP and left a message for Mike to call me back and I will discuss with him. Hopefully we can adjust at least the 91 oct tune for the 3.5" fuel strategy and then go dyno. I just don't see a point in dyno'ing when we already know it's running lean (P0171).

That way Mike doesn't need to do other adjustments to the 87 oct tow and perf tune until we see what happens with the 91 oct perf tune.

Duke

PS. 6 pages and 3,000+ views makes for a pretty good post huh?

 

Hi Duke,

I know you called earlier today, & we can make an adjustment to one of your tunes for you so that you can dyno it, no problem - I'll try to get a call back to you later today or tomorrow!

 

Hey Mike,

Well as I'm typing this Crystal called. Sounds good I'll be checking my email for the new 91 Oct per tune. I wanted to dyno on Friday after work, but then again the sooner I can get the tune the better.

I just hate driving the truck around pulling a lean code as we don't *know with certainty* if it's just lean enough to pull a code or lean enough to hurt something.

Thanks again for the help,

Duke

 

so after installing 3.25/with the right tune your now running lean??
same tune 3" you were rich?? man that is sucking in some air then...or something is afoot dear watson..

mike will figure it out,cause HE DA MAN!!!

i hope kissin butt moves me up the list...lol mike??

 

No we went straight from the 3.25" tune with a 3.0" AF1 to a 3.25" tune with a 3.5" AF1. Thats why it weant lean. Sure you would think it'd go lean in this scenario but then again I was off the charts rich and there was a good chance that it would have been rich with a 3.25" AF1 and 3.25" tune.

Mike sent out the new 3.5" tune to match the intake today so I'll load that up for my trip home.

Thanks Mike!

Duke

 

As long as you aren't hammering around at extended WOT don't worry about it. Go datalog the short term fuel trims and you'll see the computer compensating as necessary.

 

Yeah I was really easy on it during that time and didn't do multiple WOT runs.

Fortunately Mike was kind enough to send the new tune right away. "Butt dyno" (which isn't always accurate ) feels a HUGE difference. Power throughout the band feels stronger and I no longer have that extended pedal travel while going 60. Just the slightest addition of pressure on the pedal gives the necessary additional power and the truck doesn't rev (whether it be 3rd gear or trq lockup) to get more.

Who knows if this is related to a rich/lean condition that I had, but whatever it is, it feels better.

The one thing I noticed as different is this scenario:
" Cruising down the highway at 60, click OD to turn it off, and then punch it." The truck doesn't seem to pull as hard right here (whether it be going into a different gear or what) but it certainly doesn't "pop" like it did before. This isn't a big deal because I really don't do that often, it's more of a fun thing. If it helps with the overal power while cruising down the highway at part throttle changes, then I'm more then fine with that.

Either way, I'll be dynoing hopefully on Friday and sending the data log and dyno info into TP ASAP.

Thanks again,

Duke

 

Hi Duke,

Yeah, your truck is an excellent example of why we like to get datalogging on vehicles running aftermarket intakes - we actually have to use 3 different transfer functions for the 3.215" AF1, and a couple different ones on the 3.5" so far, as different trucks just react differently.

For example, originally I didn't feel that you would see lean codes on the 3.25 " AF1 MAF TF, when using the 3.5" tube, but you did - oh well, it just goes to show you!!

SO I shot you a tune with our latest MAF TF for the 3.5" AF1, that was the only change, and you can feel the difference. Now as long as in closed loop you are still within the range of adaptive strategy (which stock is typically +/- 30%), then it will correct on it's own, though it will report a lean or rich code well before it runs out of adaptive range, it's just set up conservatively.

However, once you are outside of adaptive range, then in many cases you will notice some changes in response when the MAF TF is closer, as it is now with that tune I shot you.

The bottom line is, we'll get it dialed in once we have all the data - have fun!