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Re: [Healeys] Tapping SUs for air filters.

To: <josef-eckert@t-online.de>
Subject: Re: [Healeys] Tapping SUs for air filters.
From: <simon.lachlan@alexarevel.plus.com>
Date: Thu, 22 Nov 2018 17:14:00 -0000
Cc: Healeys <healeys@autox.team.net>
Delivered-to: mharc@autox.team.net
Delivered-to: healeys@autox.team.net
References: <001701d4826d$c8fbd360$5af37a20$@alexarevel.plus.com> <1542902576035.4236909.12d85aa7faf686c55300707f8b782631839eef22@spica.telekom.de>
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I don=E2=80=99t want to destroy anything. To suggest otherwise is =
absolutely fatuous. Anyhow, I=E2=80=99ve access to loads of them.

As to horsepower, my car started life with three HS4s. I was able to =
procure three HD6s for peanuts and took advice as to fitting them. I =
spoke to Denis Welch and John Chatham=E2=80=99s from where I=E2=80=99d =
bought the car; their separate opinions were that I would indeed get =
more power and that I=E2=80=99d maybe be surprised to see fuel =
consumption drop. I won=E2=80=99t name names, but various of our gurus =
on this list concurred. I fitted the HD6s. I got better performance and, =
particularly with higher octane, better mpg. However, I=E2=80=99m sure =
you know best=E2=80=A6=E2=80=A6=E2=80=A6..

=20

=20

From: Healeys <healeys-bounces@autox.team.net> On Behalf Of =
josef-eckert@t-online.de
Sent: 22 November 2018 16:03
To: healeys@autox.team.net
Subject: [Healeys] Tapping SUs for air filters.

=20

So you want to destroy three carburetter bodies???

What do you expect from the three HD6s?? More horsepower - nope!! More =
fuel consumation!!!

=20

=20

=20

=20

-----Original-Nachricht-----

Betreff: [Healeys] Tapping SUs for air filters.

Datum: 2018-11-22T15:49:39+0100

Von: "simon.lachlan@alexarevel.plus.com =
<simon.lachlan@alexarevel.plus.com =


=20

=20

=20

I=E2=80=99ll be removing my carbs soon in order to achieve clearance for =
raising (the front of) the engine. (Harmonic balancer installation).

So, it struck me that I may give my 3 HD6s another go. Swap them with =
the current setup.

Thinking it through and looking at the big box of bits, I recalled what =
a pain it is to get the nuts and two washers onto the bolts that hold on =
the air filters. I have French manufactured K&N lookalikes. The bolt =
starts inside the filter, goes through the carb and gets two washers and =
a nut. Very awkward to deal with those nuts and washers. PITA.

I thought that I might put in helicoils then I thought =E2=80=9CWhy not =
tap the holes?=E2=80=9D

The holes on my HD6s are 11/32=E2=80=9D or 8.8mm.

I am no engineer but it seems to me, from looking at tables on Google, =
that I could use a 25/64=E2=80=9D drill bit and tap them out to =
7/16=E2=80=9D. I have both the drill and the tap but would like some =
expertise applied to the issue before I start drilling.

Any input would be much appreciated.

Thanks,

Simon

=EF=BB=BF


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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-GB =
link=3D"#0563C1" vlink=3D"#954F72"><div class=3DWordSection1><p =
class=3DMsoNormal><span style=3D'mso-fareast-language:EN-US'>I =
don=E2=80=99t want to destroy anything. To suggest otherwise is =
absolutely fatuous. Anyhow, I=E2=80=99ve access to loads of =
them.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'mso-fareast-language:EN-US'>As to horsepower, my car started =
life with three HS4s. I was able to procure three HD6s for peanuts and =
took advice as to fitting them. I spoke to Denis Welch and John =
Chatham=E2=80=99s from where I=E2=80=99d bought the car; their separate =
opinions were that I would indeed get more power and that I=E2=80=99d =
maybe be surprised to see fuel consumption drop. I won=E2=80=99t name =
names, but various of our gurus on this list concurred. I fitted the =
HD6s. I got better performance and, particularly with higher octane, =
better mpg. However, I=E2=80=99m sure you know =
best=E2=80=A6=E2=80=A6=E2=80=A6..<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'mso-fareast-language:EN-US'><o:p>&nbsp;</o:p></span></p><div><di=
v style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span =
lang=3DEN-US>From:</span></b><span lang=3DEN-US> Healeys =
&lt;healeys-bounces@autox.team.net&gt; <b>On Behalf Of =
</b>josef-eckert@t-online.de<br><b>Sent:</b> 22 November 2018 =
16:03<br><b>To:</b> healeys@autox.team.net<br><b>Subject:</b> [Healeys] =
Tapping SUs for air filters.<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt'><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>So =
you want to destroy three carburetter bodies???</span><o:p></o:p></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt'><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>Wha=
t do you expect from the three HD6s?? More horsepower - nope!! More fuel =
consumation!!!</span><o:p></o:p></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt'>&nbsp;<o:p></o:p></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt'><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><o:p></o:p></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt'>&nbsp;<o:p></o:p></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt'>&nbsp;<o:p></o:p></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt'>-----Original-Nachricht-----<o=
:p></o:p></p><p style=3D'margin:0cm;margin-bottom:.0001pt'>Betreff: =
[Healeys] Tapping SUs for air filters.<o:p></o:p></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt'>Datum: =
2018-11-22T15:49:39+0100<o:p></o:p></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt'>Von: &quot;<a =
href=3D"mailto:simon.lachlan@alexarevel.plus.com";>simon.lachlan@alexareve=
l.plus.com</a>&quot; &lt;<a =
href=3D"mailto:simon.lachlan@alexarevel.plus.com";>simon.lachlan@alexareve=
l.plus.com</a>&gt;<o:p></o:p></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt'>An: &quot;Healeys&quot; =
&lt;<a =
href=3D"mailto:healeys@autox.team.net";>healeys@autox.team.net</a>&gt;<o:p=
></o:p></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt'>&nbsp;<o:p></o:p></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt'>&nbsp;<o:p></o:p></p><p =
style=3D'margin:0cm;margin-bottom:.0001pt'>&nbsp;<o:p></o:p></p><div><div=
><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I=E2=80=99ll=
 be removing my carbs soon in order to achieve clearance for raising =
(the front of) the engine. (Harmonic balancer =
installation).<o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>So, it =
struck me that I may give my 3 HD6s another go. Swap them with the =
current setup.<o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Thinking it =
through and looking at the big box of bits, I recalled what a pain it is =
to get the nuts and two washers onto the bolts that hold on the air =
filters. I have French manufactured K&amp;N lookalikes. The bolt starts =
inside the filter, goes through the carb and gets two washers and a nut. =
Very awkward to deal with those nuts and washers. PITA.<o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I thought =
that I might put in helicoils then I thought =E2=80=9CWhy not tap the =
holes?=E2=80=9D<o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>The holes =
on my HD6s are 11/32=E2=80=9D or 8.8mm.<o:p></o:p></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I am no =
engineer but it seems to me, from looking at tables on Google, that I =
could use a 25/64=E2=80=9D drill bit and tap them out to 7/16=E2=80=9D. =
I have both the drill and the tap but would like some expertise applied =
to the issue before I start drilling.<o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Any input =
would be much appreciated.<o:p></o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Thanks,<o:p>=
</o:p></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Simon<o:p></=
o:p></p></div></div><p =
class=3DMsoNormal>=EF=BB=BF<o:p></o:p></p></div></body></html>
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