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Richard.
A stub stack is a short, usually cast aluminium piece that typically fits i=
nside a pancake style filter assembly. It has a radiused edge and smooths t=
he flow into the carburetor.
David Vizard did a lot of work on a flow bench back in the 70s and determin=
ed that the turbulence caused by the flat surface of such filters bolted di=
rectly to the carburetor could be reduced by installing such a device.
The MGB original air filters incorporate a similar design with an alloy ada=
pter with radiused edges.
Snub stacks are expensive, so I'd only use them for racing or other perform=
ance use. Moss does carry an HIF44/6 snub stack for use with the MG superch=
arger kit.
http://www.mossmotors.com/Shop/ViewProducts.aspx?PlateIndexID=3D111408
I run a couple of snub stacks on a Weber 45 DCOE in my race car, again it's=
a lot of cash for a minor improvement.
Kelvin.
From: zmagnette-bounces@autox.team.net [mailto:zmagnette-bounces@autox.team=
.net] On Behalf Of Richard Greenberg
Sent: Wednesday, November 13, 2013 9:34 AM
To: List for the Z Magnette Group - North America
Subject: Re: [Zmagnette] Stub stacks
What is a stub stack? Would it allow for a filter that lies closer to the e=
ngine than a regular pancake filter?
On Nov 13, 2013, at 9:53 AM, Allen Bachelder wrote:
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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue vli=
nk=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span style=3D'f=
ont-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Richard. =
<o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt;=
font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span><=
/p><p class=3DMsoNormal><span style=3D'font-size:11.0pt;font-family:"Calibr=
i","sans-serif";color:#1F497D'>A stub stack is a short, usually cast alumin=
ium piece that typically fits inside a pancake style filter assembly. It ha=
s a radiused edge and smooths the flow into the carburetor. <o:p></o:p></sp=
an></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt;font-family:"Ca=
libri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=3DM=
soNormal><span style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"=
;color:#1F497D'>David Vizard did a lot of work on a flow bench back in the =
70s and determined that the turbulence caused by the flat surface of such f=
ilters bolted directly to the carburetor could be reduced by installing suc=
h a device. <o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'font-=
size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </=
o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt;font-fa=
mily:"Calibri","sans-serif";color:#1F497D'>The MGB original air filters inc=
orporate a similar design with an alloy adapter with radiused edges. <o:p><=
/o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt;font-f=
amily:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:11.0pt;font-family:"Calibri","sa=
ns-serif";color:#1F497D'>Snub stacks are expensive, so I’d only use t=
hem for racing or other performance use. Moss does carry an HIF44/6 snub st=
ack for use with the MG supercharger kit. <o:p></o:p></span></p><p class=3D=
MsoNormal><span style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif=
";color:#1F497D'><o:p> </o:p></span></p><p class=3DMsoNormal><span sty=
le=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><a=
href=3D"http://www.mossmotors.com/Shop/ViewProducts.aspx?PlateIndexID=3D11=
1408">http://www.mossmotors.com/Shop/ViewProducts.aspx?PlateIndexID=3D11140=
8</a><o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:11=
.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></s=
pan></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt;font-family:"C=
alibri","sans-serif";color:#1F497D'>I run a couple of snub stacks on a Webe=
r 45 DCOE in my race car, again it’s a lot of cash for a minor improv=
ement.<o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:1=
1.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></=
span></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt;font-family:"=
Calibri","sans-serif";color:#1F497D'>Kelvin. <o:p></o:p></span></p><p class=
=3DMsoNormal><span style=3D'font-size:11.0pt;font-family:"Calibri","sans-se=
rif";color:#1F497D'><o:p> </o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'=
><o:p> </o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:=
11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p><=
/span></p><p class=3DMsoNormal><span style=3D'font-size:11.0pt;font-family:=
"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div=
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in =
0in'><p class=3DMsoNormal><b><span style=3D'font-size:10.0pt;font-family:"T=
ahoma","sans-serif"'>From:</span></b><span style=3D'font-size:10.0pt;font-f=
amily:"Tahoma","sans-serif"'> zmagnette-bounces@autox.team.net [mailto:zmag=
nette-bounces@autox.team.net] <b>On Behalf Of </b>Richard Greenberg<br><b>S=
ent:</b> Wednesday, November 13, 2013 9:34 AM<br><b>To:</b> List for the Z =
Magnette Group - North America<br><b>Subject:</b> Re: [Zmagnette] Stub stac=
ks<o:p></o:p></span></p></div></div><p class=3DMsoNormal><o:p> </o:p><=
/p><p class=3DMsoNormal>What is a stub stack? Would it allow for a filter t=
hat lies closer to the engine than a regular pancake filter?<o:p></o:p></p>=
<div><p class=3DMsoNormal><o:p> </o:p></p><div><div><p class=3DMsoNorm=
al>On Nov 13, 2013, at 9:53 AM, Allen Bachelder wrote:<o:p></o:p></p></div>=
</div><p class=3DMsoNormal><o:p> </o:p></p></div></div></body></html>=
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