Switching Delphi 85mm MAF sensors. Tuning required?
10-05-2013, 12:16 PM
#1
Switching Delphi 85mm MAF sensors. Tuning required? I'm trying to smooth out the driveability and surging as much as possible in a '00 heads/cam LS1 C5. The dyno tune was done at one shop and I had another tuner strap the car to his dyno and check the tune at his shop. The 2nd tuner agreed the car is tuned spot-on and recommended not changing a thing. So I'm confident the tune is great and running 11.8 e.t. @ 121 trap speed at 2000DA with a very soft launch and running sub-par street tires backs-up the power it made on the dynos.
I'm currently using a de-screened 85mm LS2 MAF out of a '05 C6. What I'm thinking about trying to do to smooth out driveability and the very little surging is swap out the de-screened Delphi 85mm MAF with a screened 85mm Delphi MAF. Due to my lack of tune related know-how, my question is; would the car need any tuning at all switching from one 85mm MAF to another 85mm MAF, whether it be from a C5Z06, C6, GM truck, etc? Or would that not make a difference and not be necessary?
I'm currently using a de-screened 85mm LS2 MAF out of a '05 C6. What I'm thinking about trying to do to smooth out driveability and the very little surging is swap out the de-screened Delphi 85mm MAF with a screened 85mm Delphi MAF. Due to my lack of tune related know-how, my question is; would the car need any tuning at all switching from one 85mm MAF to another 85mm MAF, whether it be from a C5Z06, C6, GM truck, etc? Or would that not make a difference and not be necessary?
10-05-2013, 04:03 PM
#2
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Well, if any of your issues relate to airflow bias or
reversion, then the swap might change something.
Kinda the point of trying, right? I haven't seen any
differences from screened on my car but the 'vettes
have more of a bend in the tract. Might play first with
just rotating the orientation of the descreened one
and see if anything results (airflow bias - nothing to
do with reversion).
reversion, then the swap might change something.
Kinda the point of trying, right? I haven't seen any
differences from screened on my car but the 'vettes
have more of a bend in the tract. Might play first with
just rotating the orientation of the descreened one
and see if anything results (airflow bias - nothing to
do with reversion).
10-05-2013, 06:35 PM
#3
Thanks jimmyblue. I first did a search and came across a post about a guy who had the same concern as me, wanting to smooth out driveability as much as possible in a heads/cam C5. He would sometimes have a slight surging under low load, low rpm steady cruising. He mentioned that he swapped out his de-screened MAF to a screened MAF and it smoothed out the driveability/surging.
But my question still persists. Would any tuning be necessary swapping a de-screened 85mm Delphi MAF with another 85mm Delphi MAF, even if the two MAF sensors come from different vehicles? Like one from a '05 C6 and the other from a C5 Z06, LS2 GTO or 6.0L truck, etc. I guess another way to ask would be; are all 85mm Delphi MAF sensors the exact same, no matter what vehicle they were installed in from the factory?
But my question still persists. Would any tuning be necessary swapping a de-screened 85mm Delphi MAF with another 85mm Delphi MAF, even if the two MAF sensors come from different vehicles? Like one from a '05 C6 and the other from a C5 Z06, LS2 GTO or 6.0L truck, etc. I guess another way to ask would be; are all 85mm Delphi MAF sensors the exact same, no matter what vehicle they were installed in from the factory?
