Lid-O-Rama - Data!
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Joined: Mar 2002
Posts: 12,604
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From: East Central Florida
Lid-O-Rama - Data! Summary:
LS-1 Motorsports and SLP Engineering aftermarket
lids eliminate any measurable flow restriction,
OEM is significant lid-only restriction. OEM and
common aftermarket filters show nearly identical
restriction, Blackwing reduces by about 1/3.
Screened MAF restriction is about the same as
the OEM lid + filter.
Experimental Detail:
I set up to test the three lids and four filters.
Many pics at
Pictures of experimental setup, and pieces tested, and SLP lid package
EDIT: not anymore, chumps at WebShots lost all my albums!
Setup: shop vac w/ vacuum port drilled into tank.
Inlet adapter cone made from plastic cup to get
smooth airflow in at std 3" orifice size of lids.
A water tube vacuum gauge set up on a 8:1 slope
was used to read the vacuum level. Baseline
vacuum draw was approx 6" H2O into a 2" diameter
final orifice. All data are relative to baseline
zeroed for each reading by placement of measure.
The limit of repeatability+resolution was about
1/8" indicated, or 1/64" H2O.
Data:
Bare Lids:
OEM 9/64"
SLP 0 <1/64"
LS-1M 0 < 1/64"
Neither of the aftermarket lids posed any meaningful restriction to this setup. The
OEM lid was noticeable. I heard a distinctive
"rushing" noise only on the OEM lid, which I
make to be turbulence induced by the "silencer"
pods.
Combinations:
OEM lid, OEM filter 17/64"
OEM lid, Blackwing filter 11/64"
LS-1M lid, Blackwing 4/64"
SLP lid, Blackwing 4/64"
LS-1M lid, Purolator filter 6/64"
LS-1M lid, Fram filter 7/64"
LS-1M lid, OEM filter 7/64"
The Blackwing filter poses roughly 2/3
the restriction of the OEM and standard
aftermarket filters. I do not have a
K&N for test. I think the filter is an
insignificant element in the flow
restriction stackup.
Another interesting datapoint, since I had the
piece off to install the SLP lid:
MAF, screened, stock 16/64"
MAF restriction is on the order of the OEM
lid + filter combines.
LS-1 Motorsports and SLP Engineering aftermarket
lids eliminate any measurable flow restriction,
OEM is significant lid-only restriction. OEM and
common aftermarket filters show nearly identical
restriction, Blackwing reduces by about 1/3.
Screened MAF restriction is about the same as
the OEM lid + filter.
Experimental Detail:
I set up to test the three lids and four filters.
Many pics at
Pictures of experimental setup, and pieces tested, and SLP lid package
EDIT: not anymore, chumps at WebShots lost all my albums!
Setup: shop vac w/ vacuum port drilled into tank.
Inlet adapter cone made from plastic cup to get
smooth airflow in at std 3" orifice size of lids.
A water tube vacuum gauge set up on a 8:1 slope
was used to read the vacuum level. Baseline
vacuum draw was approx 6" H2O into a 2" diameter
final orifice. All data are relative to baseline
zeroed for each reading by placement of measure.
The limit of repeatability+resolution was about
1/8" indicated, or 1/64" H2O.
Data:
Bare Lids:
OEM 9/64"
SLP 0 <1/64"
LS-1M 0 < 1/64"
Neither of the aftermarket lids posed any meaningful restriction to this setup. The
OEM lid was noticeable. I heard a distinctive
"rushing" noise only on the OEM lid, which I
make to be turbulence induced by the "silencer"
pods.
Combinations:
OEM lid, OEM filter 17/64"
OEM lid, Blackwing filter 11/64"
LS-1M lid, Blackwing 4/64"
SLP lid, Blackwing 4/64"
LS-1M lid, Purolator filter 6/64"
LS-1M lid, Fram filter 7/64"
LS-1M lid, OEM filter 7/64"
The Blackwing filter poses roughly 2/3
the restriction of the OEM and standard
aftermarket filters. I do not have a
K&N for test. I think the filter is an
insignificant element in the flow
restriction stackup.
Another interesting datapoint, since I had the
piece off to install the SLP lid:
MAF, screened, stock 16/64"
MAF restriction is on the order of the OEM
lid + filter combines.
Last edited by jimmyblue; Sep 27, 2005 at 08:58 AM.
TECH Junkie
Joined: Nov 2001
Posts: 3,987
Likes: 0
From: Melbourne, FL
Re: Lid-O-Rama - Data! Interesting results, but I don't believe that a test like that is as good as old fashioned track testing. I won't go into long winded specific details, but I have personally tested no filter vs. K&N filter vs. Holley filter on my car at the same track/same day. The Holley is the hands-down winner, and outperformed the no-filter scenario.
