I will admit (and I am sure most of you know...) I have been super frustrated with my current LET/Eurocharged "tune", but I will say that Matt/Jerry/Tony from Eurocharged and Brandon from Krazy House Kustoms are doing everything they can in order for this situation to be right. We arrived last night at Krazy House Kustoms around 7:15pm (after hours!) and strapped my car down and did some dyno pulls to try and dial it in. Long story short, the tune I currently had was a mess. A/F was rich (except at the top) and the timing was all over the map. I still managed a decent 340hp and 377tq to the wheels on a Mustang Dyno.....Anyway, I was still going way lean at the top of 3rd and 4th. Few tweaked tunes later we were able to get a decent A/F throughout the RPM band except it kept leaning out at the top still. Hmmmmm, at this point we didn't think my BAP was working so......We put a fuel pressure gauge on the fuel rail to see what the fuel pressure was doing at that point. Low and behold, soon as the car reached the top of 3rd, the needle "fluttered". What that means, I am not sure as it still did have what looked like, decent fuel pressure. The owner of the shop, Brandon (who was a super nice guy) said it is possible I was running out of injector, but more a fuel pump issue. Not sure....

I have decided to go the SL55 fuel pump route and be done with it. After all, my current pump does have 52k miles on it so it wouldn't hurt to change it.....I am praying this solves the lean conditions on top. The car has more in it and the current tune definitely needs to be tweaked as I am running higher octane and meth. We should see some nice numbers once we can get the lean condition to subside, add a bit of timing etc.....

I just felt it was necessary to thank all of these people that are going out of their way to help me out. Thanks guy! We are not there, but we will get this right eventually!

 

Where are you going to get your fuel pump from and how much is it?

 

I believe Eurocharged is handling this....I am not sure on the price yet.

 

it was going lean up top even with the meth? that is really weird!

hopefully you can get that worked out soon, i would not think you are maxing out the injectors.

does your obdii tool should show you your injector duty cycle, mine does.

 

The meth was not turned on during the pulls. We wanted to get the tune dialed in without it first, then tune for the meth......I am not sure if mine reads duty cycle. Is that what short/long term fuel trim is?

 

that should be it.

your torque was really high, especially on a mustang dyno!

 

Yeah, it was. Although I really wasn't paying much attention to the numbers so long as my A/F and timing were straight. Those were just the highest numbers I saw..... So how do I decipher short/long term fuel trim? It's not like it shows you a % of they duty cycle right? It may, but I haven't looked at those numbers.

 

Here are some screen captures of mine:


chart1.jpg

TimMSRT6datalog1.jpg

I would not think you are maxing yours out since others are running more boost with 181 and 185 pulleys with no fuel issues. Like you said, maybe it is your pump.

Maybe the filter in the pump is dirty.

 

Your timing looks pretty good although I can't tell how much the numbers bounced. So judging by that chart, your at 92-93% duty cycle on the injectors? Am I reading that right?

 

that is an older datalog (previous tune that was rich) but from what I see there it shows a peak of about 75%. Ignore the chart on the top, look at the graph. the chart was just showing someone how it can do an average and was most likely from a datalog that was not WOT but the graph is a WOT run.

The car had an a/f ratio in the low 11's on that datalog.

 

I am retarded, where are you getting the numbers from? Or I should say, how are you figuring the % out?

 

Top left corner in red


TimMSRT6datalog1.jpg
but I may be wrong.




Here is the fuel tuner I set up on my other car, you could adjust your fuel so easy and set up the closed loop and open loop seperately in 200rpm increments. (or as little as 50rpm increments)

Here is one of my old tunes, I could jump in the car and hook up the laptop and tune my car in just a few seconds. I really miss that It was really easy to solder in to the ecu.
Dynocorrected11-14-04.jpg

 

I wish it were that easy too man......