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nyet
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« Reply #30 on: March 20, 2013, 12:43:59 PM »
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No question - clear as water  So from all these points (the following is strongly theoretical): If I put two identical MAF with identical diameter in the car. One on the inlet side and the other on the pressure side, they both will show the same values across the rev/boost range? Neglecting air column turbulence (and any other esoteric effects), yes. |
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nyet
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« Reply #31 on: March 20, 2013, 12:45:23 PM »
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The MAF sensor should definitely come after the intercooler to battle with less tuning changes.
Not only that, but the MAF may have a preferred operating temp range where it is most accurate... |
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CoupedUp
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« Reply #32 on: March 20, 2013, 01:18:25 PM »
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Not only that, but the MAF may have a preferred operating temp range where it is most accurate...
Yea, I was wondering that. I know that there is an IAT sensor on the bottom of the intake manifold and behind the throttle body. Does the ECU calculate a difference between ambient and charge air? |
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nyet
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« Reply #33 on: March 20, 2013, 01:48:07 PM »
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Yea, I was wondering that. I know that there is an IAT sensor on the bottom of the intake manifold and behind the throttle body. Does the ECU calculate a difference between ambient and charge air?
Not the difference, per se, but IAT is used in various calculations throughout ME7 By and large, though, a thin film MAF is self-compensating for the temp of the air passing through it (by design) |
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britishturbo
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« Reply #34 on: March 21, 2013, 01:00:42 PM »
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I once thought it would be cool to go Mafless... but since using the HPX in blow through (works great for me and friends using it) I don't really see the need.
The blow through setup works very well.
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britishturbo
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« Reply #35 on: March 21, 2013, 01:01:54 PM »
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Btw you can buy a module that replaces a MAF sensor with 2 x MAP sensors (you need 2 sensors - one for ambient, one for boost) and provides a "MAF like" 0-5V output.
I'll find the link to it later.
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ddillenger
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« Reply #36 on: March 21, 2013, 01:19:06 PM »
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Btw you can buy a module that replaces a MAF sensor with 2 x MAP sensors (you need 2 sensors - one for ambient, one for boost) and provides a "MAF like" 0-5V output.
I'll find the link to it later.
That's exactly the sort of thing the OP was trying to do. |
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Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience!
Email/Google chat:
DDillenger84(at)gmail(dot)com
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britishturbo
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« Reply #37 on: March 21, 2013, 01:22:41 PM »
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britishturbo
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« Reply #38 on: March 21, 2013, 01:31:23 PM »
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Hmmmm I just realized that unit has "WOT AFR Tracking"
Hookup a Wideband to it and it will adjust the maf output in realtime to match the AFR you want... wow, cool little unit
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nyet
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« Reply #39 on: March 21, 2013, 01:34:33 PM »
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Hmmmm I just realized that unit has "WOT AFR Tracking"
Hookup a Wideband to it and it will adjust the maf output in realtime to match the AFR you want... wow, cool little unit
holy fuckballs that is sweet. Kinda scary though, not sure if ME7 would appreciate load moving around like that |
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Axis
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« Reply #40 on: March 21, 2013, 01:35:35 PM »
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Hmmmm I just realized that unit has "WOT AFR Tracking"
Hookup a Wideband to it and it will adjust the maf output in realtime to match the AFR you want... wow, cool little unit
Might sound cool in theory, but what is the practical improvment over STFT? |
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britishturbo
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« Reply #41 on: March 21, 2013, 01:39:52 PM »
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Might sound cool in theory, but what is the practical improvment over STFT?
Think open loop... not closed loop.... Hello! |
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britishturbo
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« Reply #42 on: March 21, 2013, 01:40:34 PM »
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holy fuckballs that is sweet. Kinda scary though, not sure if ME7 would appreciate load moving around like that Might just have to get one and try it... hehe :-) |
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nyet
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« Reply #43 on: March 21, 2013, 01:42:28 PM »
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Might just have to get one and try it... hehe :-)
Does it need an RPM pickup? throttle plate/accel pedal input? |
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Axis
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« Reply #44 on: March 21, 2013, 01:44:57 PM »
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Think open loop... not closed loop.... Hello!
 Hello! Explain how AFR Tracking differs from Closed loop |
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