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Scion tC 1G Forced Induction Turbo and supercharger applications...

Blow Thru Setup, Help! Ptuning anyone!

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Old Aug 2, 2009 | 01:48 PM
  #21  
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what the afrs again before stalling? and it does it when coming off gear or clutch pedal pressed? is it during deceleration? what is the vacuum reading before stalling? It might be that the maf needs to be recalibrated for your pipe or maybe just afr/ignition issue
Old Aug 2, 2009 | 06:18 PM
  #22  
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ill have to go drive around again to check, it happens if like im in gear at above 3k rpms and i press the clutch in and hold for like 5+ more seconds then it stalls, also sometimes i shift it will act is if its trying to stall (i think this might be cuz of a leaking bov or thats its not recirc'd)?
Old Aug 2, 2009 | 06:32 PM
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also pull sometiming in the idle area...
Old Aug 2, 2009 | 06:46 PM
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yeah sounds like the problem is around decel and idle area.. how does the car idle, any surging?
Old Aug 2, 2009 | 06:54 PM
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idles good at like 14.7-15
Old Aug 2, 2009 | 07:05 PM
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no surging in rpms at idle? not sure about the ultimate but try datalogging a run and when it does this and see how much timing you have and compare with your afrs and other data.. maybe the problem is with the maf, doesnt like his new piping environment like elevation said it may want a different afr or ignition at idle so compensate.. Out stock maf isnt calibrated for that setup..
Old Aug 2, 2009 | 07:27 PM
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my rpms are always a little rough sometimes at idle cuz im using the automatic ecu still :/ sometimes its fine and just sits but other times its jumpy
Old Aug 2, 2009 | 07:31 PM
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automatic ecu? wouldnt it cause some driveability problems when used on a manual? not sure. lol maybe it wanna shift but this time you are the boss lol
Old Aug 2, 2009 | 07:44 PM
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nah no driving mishaps caused by it just idle issues sometimes, but ill go out in a little bit and look at the afr's
Old Aug 2, 2009 | 08:15 PM
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well i cant tell u what the afr's are when it stalls because everytime i let off the throttle in any gear my aem gauge says " - - - " lol and it will continue to say "- - -" until i either downshift or give it gas,
Old Aug 2, 2009 | 08:44 PM
  #31  
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^^ try putting some fuel on decel, though its normally lean during fuel cut off too lean can cause stalling
Old Aug 2, 2009 | 09:59 PM
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i still need someone whos pro with this setup to confirm that my piping has no fault.
Old Aug 2, 2009 | 10:24 PM
  #33  
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It should be good tuning needed! Take it from me dummy I have that setup
Old Aug 2, 2009 | 10:40 PM
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well luiggi has thrown me on the back burner lol idk why, im highly considering a trip to CFT to get this car DONE.
Old Aug 2, 2009 | 11:11 PM
  #35  
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Do what you gotta do. Talk to him. Be a msn. And talk to him like a paying customer that's if you pay. And if you dont well what do you expect paying customer will come first lol.
Old Aug 2, 2009 | 11:46 PM
  #36  
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well ive paid for a tune and ive yet to get a perfect tune out of all of these i have gotten.
Old Aug 3, 2009 | 09:28 PM
  #37  
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Originally Posted by SoFloTC
well ive paid for a tune and ive yet to get a perfect tune out of all of these i have gotten.
I will tune you thats not the issue but you want to put on the meth and all the other things which i need to retune again and again.. lets get everything on and ready then we finish the tune once and for all........ Just give me a time in advance I am extremely busy this week but i will make time for your car.

Take it easy...
Luiggi
Old Aug 3, 2009 | 10:24 PM
  #38  
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If your MAF sensor is now located on the upper intercooler pipe, chances are with your kit it is 2.25" in diameter. At very mininum, you will want to alter the airflow map on your EMU to reduce the amount of airflow the stock ECU sees at idle and you will certainly need to clamp the overall voltage on the MAF so that it does not see above 5V, which on a 2.25 diameter pipe will occur very quickly. This will prevent the ECU from throwing codes pertaining to invalid airflow voltages under certain engine conditions.

Secondly, having the airflow values that are so far off for a given load point will result in timing values that are now too low (loss of power under these lower engine loads). This assumes of course, that your tuner isn't already aware of this and tunes the timing map occordingly.

As far as the BOV location goes, your tuner may be right, the only way to find out is by disconnecting the vacuum line going to the BOV to keep it closed (see how the engine reacts). It may be possible that the close proximity of your BOV to your MAF sensor will cause excessive turbulence near the MAF probe causing it to go nuts everytime the BOV opens. If you can, it would probably benefit you to locate the BOV as far in front of the MAF sensor as possible. Hint, look at our Spec-SS Turbo Kit.

- Toan
Old Aug 3, 2009 | 10:43 PM
  #39  
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i thought the dezod pipe to throttle body was 2.5" maybe im wrong, so if it is 2.25" ur advising that i get a piece of 2.5" piping and place the MAF on that piece?


ill have the maf moved further back

Last edited by SoFloTC; Aug 3, 2009 at 10:51 PM.
Old Aug 11, 2009 | 04:03 PM
  #40  
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a 2.5" pipe will do just fine. if you go bigger diameter your car will run leaner.
i run a blow tru setup myself. my maf sensor is located just in front where the charge pipe bends to go into the intake.



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