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Author Topic: 2001 Audi A4 with 2.7 single turbo swap  (Read 182240 times)
marcellus
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« Reply #30 on: March 11, 2012, 08:32:11 PM »

I am semi-finished with my MAF.  My car HATES it as it sits.  I didnt know that damn thing was so sensitive.  I stuck my hand in front of the sensor just to see if it was pulling in air, and I stalled the motor.  I closed the hood and the idle went haywire.  I think I need to get some straight piping in front of the sensor to clean the readings up.

Pics:






Kind of what I was thinking of:


I dont know how it will react with the bend in front of it, and I will have to relocate the power steering res.  Maybe I can relocate the MAF a few inches back on the pipe and use that space for a straight section..  


edited to reword the last part
« Last Edit: October 08, 2012, 09:23:05 PM by marcellus » Logged
marcellus
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« Reply #31 on: March 11, 2012, 08:37:10 PM »

Maybe I can push the hotside piping more forwards and try to squeeze it here:





If I run it down there I should be able to run the 3.5" tube from the MAF all the way to the front core support.  But, things never work out as planned...I am sure it would be a major pita to squeeze that pipe in there.
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marcellus
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« Reply #32 on: March 11, 2012, 09:35:59 PM »

yo, definitely change your kfmiop and kfmirl to use the linked project, below, set to big turbo.
the kfmirl and kfmiop's you showed there are for mid-rpm turbos, right?  dual-k04's with mid-rpm response.

http://nefariousmotorsports.com/forum/index.php?topic=1371.0title=



The tables I showed are the ones from the files posted on the forum.  I havent changed any of them, I was just analyzing the differences so I can see which way I should go.  I attempted to use the calculators and I always seem to get something funky in the first few colums when I post my IRL and tell it to compute.  Also the IRL calculator table is bigger than my XDF is set to. 
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jibberjive
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« Reply #33 on: March 11, 2012, 09:57:20 PM »

Nice to see pics of the hardware.  Looks good, though probably a little short-sighted to wait until after everything is complete to figure out where you're going to run a MAF and filter.  You definitely want flow to be laminar by the sensor, so a straight section would be nice (if possible).  You'll probably want to run a flow straightener like this as well http://www.saxonpc.com/100mm-cells-for-100.html

yo, definitely change your kfmiop and kfmirl to use the linked project, below, set to big turbo.
the kfmirl and kfmiop's you showed there are for mid-rpm turbos, right?  dual-k04's with mid-rpm response.

http://nefariousmotorsports.com/forum/index.php?topic=1371.0title=


  Do you use that program for stuff on your 2.7t m-box?  If so, I assume just to translate KFMIRL to KFMIOP, and possibly the KFZWOP converter?
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marcellus
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« Reply #34 on: March 11, 2012, 10:19:50 PM »

Nothing really went as I planned or imagined with the plumbing.  I meant to relocate the ABS and the power steering res. so I would have a big open space to play with.  I got tired of messing around with all the little things and really wanted the car running, and I couldnt figure where to neatly tuck the abs and didnt want to remake the lines.  I had enough on my plate as it was.  Hindsight says I should have moved all that stuff because now I am in a bind.

My last setup in this car was MAFless so I forgot about all the little things needed to make it work.  Another thought.....I might buy a flange and have it welded further back on the intake, extend the charge piping more forward and weld more piping on the end of the intake pipe.  Do you think the readings will be messed up with a bend right behind the meter? 

http://www.treadstoneperformance.com/product.phtml?p=2479&cat_key=467&prodname=Chevy+Corvette+Upgrade+MAF+Flange+Adapter

« Last Edit: March 11, 2012, 10:22:04 PM by marcellus » Logged
jibberjive
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« Reply #35 on: March 11, 2012, 10:44:53 PM »

I think it has the potential to have erratic/incorrect readings, but you don't know until you try.  Before you go welding new flanges and whatnot, I'd probably just try the cheap trick of a flow straightener first.  Never know, it could be as simple as that $10 fix.
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marcellus
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« Reply #36 on: March 12, 2012, 07:59:38 AM »

Thank you!  I was going to get one, but the ones I found were quite a bit more money.
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fastestaudiwagon
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« Reply #37 on: March 12, 2012, 01:15:54 PM »

Nice to see another single turbo car. I hope you iron out everything. good luck.
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marcellus
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« Reply #38 on: March 12, 2012, 01:30:54 PM »

Nice to see another single turbo car. I hope you iron out everything. good luck.

Thank you! 
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marcellus
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« Reply #39 on: March 12, 2012, 02:03:04 PM »

WOW!

http://forums.quattroworld.com/s4/msgs/149459.phtml

I dont know what the issue is there.   Huh  No, love lost over it. 
« Last Edit: March 12, 2012, 02:10:46 PM by marcellus » Logged
Snow Trooper
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« Reply #40 on: March 12, 2012, 02:30:13 PM »

WOW!

http://forums.quattroworld.com/s4/msgs/149459.phtml

I dont know what the issue is there.   Huh  No, love lost over it. 

I think that one guy confused you and FAW.  I was kinda confused on him saying you had an attitude, then i realized who he was referring to.
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« Reply #41 on: March 12, 2012, 02:31:58 PM »

Nice to see another single turbo car. I hope you iron out everything. good luck.

Hey Mu, welcome to nef.  You should put your car back onto motronic and tune it yourself, would be cool to have data on more setups.
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marcellus
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« Reply #42 on: March 12, 2012, 02:42:47 PM »

Its Cool.

Whats your thoughts on the intake?  I dont want to send you jacked up logs because of it.  I flashed a few different stage three files yesterday just to see what the MAF was reading at idle.  They range from the low 5 to high 7 range. 

Ordered the flow straightener.  Since the guy is in Oregon(one state down)  i should have it pretty quick. 

Thanks for the link JibberJive. 
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« Reply #43 on: March 12, 2012, 02:50:19 PM »

the maf will matter but it isnt crucial right now.  try running with it unplugged and in speed density mode.  as long as your AFRs stay ok while its unplugged it will be okay to start forming your maps.  the maf will be needed when its time to boost more than low 20s.

right now we need to see what your car, with nothing working against it is truly capable of spool wise.  we really need rpms vs spool vs requested and we can start to tackle getting the system to boost properly. that can even be logged with vag-com.

once we know what that turbo does on 2.7 liters we can map everything around that.

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« Reply #44 on: March 12, 2012, 02:50:55 PM »

also, I think I left some of your o2 heater stuff on, if you get codes for them, ignore for now.
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