i_love_cars said:

seems that way. Just fuckin' weird. After your idea yesterday I second-guessed myself and emailed Terry immediately (as noted) and double-checked my research and while it all lines up, I just don't get it. 

To my understanding, even the N54 runs like, well, pretty much every motor you can think of, meaning it likes low 12's for AFR as the happy place. 

This is why I don't tune my own N55 and just leave it to someone who knows WTF they're doing

To be fair, I'm running about 13 under full boost to 12.6 by redline.

To my understanding, even the N54 runs like, well, pretty much every motor you can think of, meaning it likes low 12's for AFR as the happy place. 

This is why I don't tune my own N55 and just leave it to someone who knows WTF they're doing

Here is one of their charts and the AFR is very similar to mine. They run about 12.9 sooner but above 4500 rpm they are still at 13.3 or so:

i_love_cars said:

So far so good. N55's do run a bit more on the lean side anyway but my AFRs pull down to about 12.9-13.1 above 5400 rpm. Terry looked at logs I emailed him and said it looked fine but with the timing on the BEF I just don't see a 12.3 AFR happening without PI or meth. I don't think it's going to be anywhere near dangerous enough to lean out at those numbers, though. 

If you're comfortable with it, that's all that matters. If I were you, I'd richen it up with by adjusting the scalers in the BEF.

I hope you're not still running lean. I saw your post on N54tech and looked at your logs.

475 whp / 477 wtq on E50 was my best pull today. The power band looks fantastic and I really couldn't be happier, especially knowing that I put all the parts on the car together myself and shit isn't blowing up. 

First 2 pulls were back at 21 psi same as what I had last week when I was making 420. When those looked clean I upped the targets to 23 psi in the midrange. Pull 3 had intake temps of 120 degrees so I had their dyno tech spray the engine down a bit before the 4th pull and picked up an extra 9 hp / 8 tq on the 4th pull.  23 psi in the midrange gave a really nice power increase between 4k and 5500 as you can see. 

I would really like to have that in my pocket to upload and test with to see if it is just a tuning issue on the back end. Hopefully he responds today.

I know my E85 backend flash drops all cylinder timing to 9-10° right when I hit full boost. From there, it tapers up to 12-13° advanced. Looks to me like all of your cylinders (except #1) aren't advancing timing.

patsbimmer1 said:

Did the n55 have injector issues?

not as widespread as N54 but it does happen.

Earl said:

Couldn't you have simply pulled a plug and checked it there instead of running back and forth to the dyno?

probably. it only takes a minute to swap them but I was at the dyno more to just get a base run of where I am currently at. Not really trying to solve world problems there. LMT had $50 pulls for the month of May which is a pretty good deal so I figured why the hell not.

Going to pull the plug and check the gap next I guess.

Also, sweet flames breh.

So my plan is this:  figure out if I have a bad coil or injector on Cylinder 1, then get these new colder N20 plugs installed and working properly. Currently running a stock heat range plug and some of you know I tried the N20 plugs as recommended by Dzenno and PTF and I had some issues. I'm going to revisit that because they are a colder heat range and many other N55s are reporting success with them. Today I am going to swap coils between cylinders 1 and 2 to see if my timing issue shifts over to cylinder 2. 

Hopefully this will inform me enough to fix the car and resume tuning because at this point all I have is a cobb flash and a JB4 with high boost targets. No adjustments have been dialed in yet for AFR or timing bias in my jb4 map.

#exhaustFlames

http://vid1170.photobucket.com/albums/r526/wardjt1983/IMG_0127_zpsuzatlhtm.mp4

patsbimmer1 said:

bk335 said:

Looking good. 

I had my car aligned at big bear last fall and whatever they adjust in the steering has been squeaking ever since.  It gets worse when the temp gets colder so I'm really stumped what squeaks.

All they do is turn the inner tie rod... unless the boot got jammed up it shouldn't make any noise, although if that happens it usually doesn't make noise and/or the boot will correct itself.  If it's only when turning the wheel it's likely a lower balljoint or upper strut mount.  

That's exactly what I thought. I took the tie rods off a while back and greased the outer ball joints but that didn't help at all. It sounds like it's more where the rack and pinion meet.

bk335 said:

Looking good. 

I had my car aligned at big bear last fall and whatever they adjust in the steering has been squeaking ever since.  It gets worse when the temp gets colder so I'm really stumped what squeaks.

All they do is turn the inner tie rod... unless the boot got jammed up it shouldn't make any noise, although if that happens it usually doesn't make noise and/or the boot will correct itself.  If it's only when turning the wheel it's likely a lower balljoint or upper strut mount.

shoulda taken it back to them. They do a lot of track setups for people I know and I've had all 4 of my cars there and never any issues. Jason is usually really good. Our goal should be to get our steering problem fixed before the next WIBimmers meet, otherwise Snap will just have more ammunition to make fun of us with as he lashes out at others who have functioning cars because he refuses to man up and buy a 335.