MAF placement
07-08-2011, 07:54 PM
#1
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MAF placement Is there a min/max distance I can install the MAF from the TB? Are there any advantages to having it closer or farther away?
TIA,
Dhamen
TIA,
Dhamen
07-08-2011, 09:44 PM
#2
Minimum distance... look at several factory cars, the MAF and TB are the same part. LS1 based F-Body cars are pretty close to the TB while trucks are much farther away.
The number one rule I have heard is to not have the MAF imminently before or after a bend as it tends to skew the readings.
The number one rule I have heard is to not have the MAF imminently before or after a bend as it tends to skew the readings.
07-08-2011, 10:33 PM
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That makes sense. The elbows create turbulence which throws the readings off. Then I also want to keep it as close to the TB as possible to get an accurate temp reading.
Thanks gofastwclass it's simple and it's clear to me now.
Thanks gofastwclass it's simple and it's clear to me now.
07-11-2011, 03:35 PM
#5
Minimum distance... look at several factory cars, the MAF and TB are the same part. LS1 based F-Body cars are pretty close to the TB while trucks are much farther away.
The number one rule I have heard is to not have the MAF imminently before or after a bend as it tends to skew the readings.
The number one rule I have heard is to not have the MAF imminently before or after a bend as it tends to skew the readings.
This. I'm planning on using a fairly tight 90* connected to the TB and the backside of the MAF, and hopefully at least a foot long tube in front of the MAF. If I can make it fit, I might even try to use a stock truck airbox and panel filter
I recall an automotive engineer friend telling me (and posting) 2 things. First, if there IS a bend in the pipe pre-MAF, ideally you want the air to make 1 complete swirl before going thru the MAF. That, and every real automotive engineer you'lle ver talk to will tell you if they were designing an intake without space constrictions - they'd use the largest panel filter you can fit. Not one has ever said they'd use a cone filter..... Food for thought, eh??
07-15-2011, 10:01 PM
#6
TECH Fanatic
Ive been thinking about the same thing, but here's what Im thinking of I have a 1987 GN, and GM have the MAF before the turbo inlet, Im installing a turbo on a LQ4, and was thinking of trying the MAF on the inlet of the turbo to see how it works, but on the GN it sit a good 2feet from the turbo.
07-15-2011, 10:14 PM
#7
Ive been thinking about the same thing, but here's what Im thinking of I have a 1987 GN, and GM have the MAF before the turbo inlet, Im installing a turbo on a LQ4, and was thinking of trying the MAF on the inlet of the turbo to see how it works, but on the GN it sit a good 2feet from the turbo.
I would think that the only time it could be an issue is if there is compressor surge, it could send pressure pulses back out thru the MAF.
