Nitrous, descreened MAF and airflow dynamics
01-12-2006 | 02:24 PM
#1
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From: East Central Florida
Nitrous, descreened MAF and airflow dynamics I think I have hit upon the cleanest way for me to do
a high-stealth setup. It's unique to the Blackwing lid
(SS option) and would reuse the AIR breather line and
elbow, to feed the jet streams up from below the
radiator support / lower airbox panel.
My question is this: with the expanded N2O stream
blowing crosswise, would I see any significant MAF
error? I would expect a lot of turbulence in the air
space above the filter, which is normally pretty
laminar and a nice straight shot up the tract to the
manifold. I attached a pic w/ airflows doodled in....
Wondering if anyone's run a side-shooting setup of
similar construction and has observed MAF error
problems (or the lack).
a high-stealth setup. It's unique to the Blackwing lid
(SS option) and would reuse the AIR breather line and
elbow, to feed the jet streams up from below the
radiator support / lower airbox panel.
My question is this: with the expanded N2O stream
blowing crosswise, would I see any significant MAF
error? I would expect a lot of turbulence in the air
space above the filter, which is normally pretty
laminar and a nice straight shot up the tract to the
manifold. I attached a pic w/ airflows doodled in....
Wondering if anyone's run a side-shooting setup of
similar construction and has observed MAF error
problems (or the lack).
01-12-2006 | 02:41 PM
#2
AFAIC there is no such thing as not having MAF error.
The MAF just does what it does, and then assumes a certain oxygen content. It is not an oxygen sensor, just fairly good at measuring 'standard' air mass.
The added oxygen in N2O is NOT accounted for by the MAF at all.
The only reason you get a higher MAF reading with N2O is because of the temperature drop. The relative temperature as read by the MAF is directly dependant on the distance and direction between the MAF and the N2O discharge nozzle.
Mounting the nozzle so far away from the MAF will definately allow a warmer temperature at the MAF and give less signal /less fueling for the N2O.
Not saying this is good or bad, just that you will obviously have to adjust your tune, or this distance to get whatever AFR you're shooting for.
The MAF just does what it does, and then assumes a certain oxygen content. It is not an oxygen sensor, just fairly good at measuring 'standard' air mass.
The added oxygen in N2O is NOT accounted for by the MAF at all.
The only reason you get a higher MAF reading with N2O is because of the temperature drop. The relative temperature as read by the MAF is directly dependant on the distance and direction between the MAF and the N2O discharge nozzle.
Mounting the nozzle so far away from the MAF will definately allow a warmer temperature at the MAF and give less signal /less fueling for the N2O.
Not saying this is good or bad, just that you will obviously have to adjust your tune, or this distance to get whatever AFR you're shooting for.
01-12-2006 | 05:01 PM
#3
It'll work and a vette buddy has his like this. He may have run his line and nozzle all the way up, but however he did it, it worked fine. This coming from the side is how the standard dry set-ups are plumbed in stock airboxes. I really see no problems. If you check out my web there are numerous CAI boxes and nozzle location pics, for insight. Dry is forgiving for sure, on placement, unless really close or really far from maf.
Robert
Robert
