Subject: [WPTA] MGB Tune advise / opinion

From: Jim Thornton via Wpta <[email-masked]>
Date: Sat, 24 May 2025 18:04:26 -0400

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div><p style=3D"margin: 0px; font-style: n=
ormal; font-variant-caps: normal; font-width: normal; line-height: normal; f=
ont-family: system-ui; font-size-adjust: none; font-kerning: auto; font-vari=
ant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric=
: normal; font-variant-east-asian: normal; font-variant-position: normal; fo=
nt-variant-emoji: normal; font-feature-settings: normal; font-optical-sizing=
: auto; font-variation-settings: normal;">Hi all.&nbsp; Looking for opinion o=
n my MGB set up.&nbsp; I am getting some backfiring when decelerating and tw=
eaking things to get it to run better. &nbsp;</p>
<p style=3D"margin: 0px; font-style: normal; font-variant-caps: normal; font=
-width: normal; line-height: normal; font-family: system-ui; font-size-adjus=
t: none; font-kerning: auto; font-variant-alternates: normal; font-variant-l=
igatures: normal; font-variant-numeric: normal; font-variant-east-asian: nor=
mal; font-variant-position: normal; font-variant-emoji: normal; font-feature=
-settings: normal; font-optical-sizing: auto; font-variation-settings: norma=
l; min-height: 27.4px;"><br></p>
<p style=3D"margin: 0px; font-style: normal; font-variant-caps: normal; font=
-width: normal; line-height: normal; font-family: system-ui; font-size-adjus=
t: none; font-kerning: auto; font-variant-alternates: normal; font-variant-l=
igatures: normal; font-variant-numeric: normal; font-variant-east-asian: nor=
mal; font-variant-position: normal; font-variant-emoji: normal; font-feature=
-settings: normal; font-optical-sizing: auto; font-variation-settings: norma=
l;">DCOE side draft carb</p>
<p style=3D"margin: 0px; font-style: normal; font-variant-caps: normal; font=
-width: normal; line-height: normal; font-family: system-ui; font-size-adjus=
t: none; font-kerning: auto; font-variant-alternates: normal; font-variant-l=
igatures: normal; font-variant-numeric: normal; font-variant-east-asian: nor=
mal; font-variant-position: normal; font-variant-emoji: normal; font-feature=
-settings: normal; font-optical-sizing: auto; font-variation-settings: norma=
l;">Timing is 20 BTDC at 1000 rpm</p>
<p style=3D"margin: 0px; font-style: normal; font-variant-caps: normal; font=
-width: normal; line-height: normal; font-family: system-ui; font-size-adjus=
t: none; font-kerning: auto; font-variant-alternates: normal; font-variant-l=
igatures: normal; font-variant-numeric: normal; font-variant-east-asian: nor=
mal; font-variant-position: normal; font-variant-emoji: normal; font-feature=
-settings: normal; font-optical-sizing: auto; font-variation-settings: norma=
l; min-height: 27.4px;"><br></p>
<p style=3D"margin: 0px; font-style: normal; font-variant-caps: normal; font=
-width: normal; line-height: normal; font-family: system-ui; font-size-adjus=
t: none; font-kerning: auto; font-variant-alternates: normal; font-variant-l=
igatures: normal; font-variant-numeric: normal; font-variant-east-asian: nor=
mal; font-variant-position: normal; font-variant-emoji: normal; font-feature=
-settings: normal; font-optical-sizing: auto; font-variation-settings: norma=
l;">main jet 155</p>
<p style=3D"margin: 0px; font-style: normal; font-variant-caps: normal; font=
-width: normal; line-height: normal; font-family: system-ui; font-size-adjus=
t: none; font-kerning: auto; font-variant-alternates: normal; font-variant-l=
igatures: normal; font-variant-numeric: normal; font-variant-east-asian: nor=
mal; font-variant-position: normal; font-variant-emoji: normal; font-feature=
-settings: normal; font-optical-sizing: auto; font-variation-settings: norma=
l;">air corrector 170</p>
<p style=3D"margin: 0px; font-style: normal; font-variant-caps: normal; font=
-width: normal; line-height: normal; font-family: system-ui; font-size-adjus=
t: none; font-kerning: auto; font-variant-alternates: normal; font-variant-l=
igatures: normal; font-variant-numeric: normal; font-variant-east-asian: nor=
mal; font-variant-position: normal; font-variant-emoji: normal; font-feature=
-settings: normal; font-optical-sizing: auto; font-variation-settings: norma=
l;">Idle jet 55F9</p>
<p style=3D"margin: 0px; font-style: normal; font-variant-caps: normal; font=
-width: normal; line-height: normal; font-family: system-ui; font-size-adjus=
t: none; font-kerning: auto; font-variant-alternates: normal; font-variant-l=
igatures: normal; font-variant-numeric: normal; font-variant-east-asian: nor=
mal; font-variant-position: normal; font-variant-emoji: normal; font-feature=
-settings: normal; font-optical-sizing: auto; font-variation-settings: norma=
l;">Air/Fuel turned back to 3 turns out.</p></div><div><br></div><br id=3D"l=
ineBreakAtBeginningOfSignature"><div dir=3D"ltr"><div><div><span style=3D"ba=
ckground-color: rgba(255, 255, 255, 0);">Jim Thornton</span></div><div><a hr=
ef=3D"x-apple-data-detectors://0" x-apple-data-detectors=3D"true" x-apple-da=
ta-detectors-type=3D"address" x-apple-data-detectors-result=3D"0" style=3D"b=
ackground-color: rgba(255, 255, 255, 0);"><font color=3D"#000000">25 Sheila C=
ourt</font></a></div><div><a href=3D"x-apple-data-detectors://0" x-apple-dat=
a-detectors=3D"true" x-apple-data-detectors-type=3D"address" x-apple-data-de=
tectors-result=3D"0" style=3D"background-color: rgba(255, 255, 255, 0);"><fo=
nt color=3D"#000000">Pittsburgh, PA 15227</font></a></div></div><div><span s=
tyle=3D"background-color: rgba(255, 255, 255, 0);">&nbsp;</span></div><div><=
span style=3D"background-color: rgba(255, 255, 255, 0);">(C):&nbsp;&nbsp;<a h=
ref=3D"tel:412-680-0939" x-apple-data-detectors=3D"true" x-apple-data-detect=
ors-type=3D"telephone" x-apple-data-detectors-result=3D"3">412-680-0939</a><=
/span></div><div><span style=3D"background-color: rgba(255, 255, 255, 0);">&=
nbsp;</span></div></div></body></html>=

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_______________________________________________
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Archive: http://www.team.net/archive

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From: Larry Ross via Wpta <[email-masked]>
Date: Sat, 24 May 2025 23:57:52 -0400

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Could be a distributor issue...

I had the same issue on my TR8...

Larry Ross

On Sat, May 24, 2025, 6:12=E2=80=AFPM Jim Thornton via Wpta <[email-masked]=
m.net>
wrote:

> Hi all.  Looking for opinion on my MGB set up.  I am getting some
> backfiring when decelerating and tweaking things to get it to run better.
>
>
> DCOE side draft carb
>
> Timing is 20 BTDC at 1000 rpm
>
>
> main jet 155
>
> air corrector 170
>
> Idle jet 55F9
>
> Air/Fuel turned back to 3 turns out.
>
>
> Jim Thornton
> 25 Sheila Court
> Pittsburgh, PA 15227
>
> (C):  412-680-0939
>
> Donate: http://www.team.net/donate.html
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/wpta/[email-masked]
>
>
>

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<div dir=3D"auto"><div dir=3D"auto"><br></div><div dir=3D"auto">Could be a =
distributor issue...</div><div dir=3D"auto"><br></div><div dir=3D"auto">I h=
ad the same issue on my TR8...</div><div dir=3D"auto"><br></div><div dir=3D=
"auto">Larry Ross</div></div><br><div class=3D"gmail_quote gmail_quote_cont=
ainer"><div dir=3D"ltr" class=3D"gmail_attr">On Sat, May 24, 2025, 6:12=E2=
=80=AFPM Jim Thornton via Wpta &lt;<a href=3D"mailto:[email-masked]">w=
[email-masked]</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote=
" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><=
div dir=3D"auto"><div><p style=3D"margin:0px;font-style:normal;font-variant=
-caps:normal;line-height:normal;font-family:system-ui;font-size-adjust:none=
;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:no=
rmal;font-variant-numeric:normal;font-variant-east-asian:normal;font-featur=
e-settings:normal">Hi all.=C2=A0 Looking for opinion on my MGB set up.=C2=
=A0 I am getting some backfiring when decelerating and tweaking things to g=
et it to run better. =C2=A0</p>
<p style=3D"margin:0px;font-style:normal;font-variant-caps:normal;line-heig=
ht:normal;font-family:system-ui;font-size-adjust:none;font-kerning:auto;fon=
t-variant-alternates:normal;font-variant-ligatures:normal;font-variant-nume=
ric:normal;font-variant-east-asian:normal;font-feature-settings:normal;min-=
height:27.4px"><br></p>
<p style=3D"margin:0px;font-style:normal;font-variant-caps:normal;line-heig=
ht:normal;font-family:system-ui;font-size-adjust:none;font-kerning:auto;fon=
t-variant-alternates:normal;font-variant-ligatures:normal;font-variant-nume=
ric:normal;font-variant-east-asian:normal;font-feature-settings:normal">DCO=
E side draft carb</p>
<p style=3D"margin:0px;font-style:normal;font-variant-caps:normal;line-heig=
ht:normal;font-family:system-ui;font-size-adjust:none;font-kerning:auto;fon=
t-variant-alternates:normal;font-variant-ligatures:normal;font-variant-nume=
ric:normal;font-variant-east-asian:normal;font-feature-settings:normal">Tim=
ing is 20 BTDC at 1000 rpm</p>
<p style=3D"margin:0px;font-style:normal;font-variant-caps:normal;line-heig=
ht:normal;font-family:system-ui;font-size-adjust:none;font-kerning:auto;fon=
t-variant-alternates:normal;font-variant-ligatures:normal;font-variant-nume=
ric:normal;font-variant-east-asian:normal;font-feature-settings:normal;min-=
height:27.4px"><br></p>
<p style=3D"margin:0px;font-style:normal;font-variant-caps:normal;line-heig=
ht:normal;font-family:system-ui;font-size-adjust:none;font-kerning:auto;fon=
t-variant-alternates:normal;font-variant-ligatures:normal;font-variant-nume=
ric:normal;font-variant-east-asian:normal;font-feature-settings:normal">mai=
n jet 155</p>
<p style=3D"margin:0px;font-style:normal;font-variant-caps:normal;line-heig=
ht:normal;font-family:system-ui;font-size-adjust:none;font-kerning:auto;fon=
t-variant-alternates:normal;font-variant-ligatures:normal;font-variant-nume=
ric:normal;font-variant-east-asian:normal;font-feature-settings:normal">air=
 corrector 170</p>
<p style=3D"margin:0px;font-style:normal;font-variant-caps:normal;line-heig=
ht:normal;font-family:system-ui;font-size-adjust:none;font-kerning:auto;fon=
t-variant-alternates:normal;font-variant-ligatures:normal;font-variant-nume=
ric:normal;font-variant-east-asian:normal;font-feature-settings:normal">Idl=
e jet 55F9</p>
<p style=3D"margin:0px;font-style:normal;font-variant-caps:normal;line-heig=
ht:normal;font-family:system-ui;font-size-adjust:none;font-kerning:auto;fon=
t-variant-alternates:normal;font-variant-ligatures:normal;font-variant-nume=
ric:normal;font-variant-east-asian:normal;font-feature-settings:normal">Air=
/Fuel turned back to 3 turns out.</p></div><div><br></div><br id=3D"m_24328=
84776870730897lineBreakAtBeginningOfSignature"><div dir=3D"ltr"><div><div><=
span style=3D"background-color:rgba(255,255,255,0)">Jim Thornton</span></di=
v><div><a style=3D"background-color:rgba(255,255,255,0)" rel=3D"noreferrer"=
><font color=3D"#000000">25 Sheila Court</font></a></div><div><a style=3D"b=
ackground-color:rgba(255,255,255,0)" rel=3D"noreferrer"><font color=3D"#000=
000">Pittsburgh, PA 15227</font></a></div></div><div><span style=3D"backgro=
und-color:rgba(255,255,255,0)">=C2=A0</span></div><div><span style=3D"backg=
round-color:rgba(255,255,255,0)">(C):=C2=A0=C2=A0<a href=3D"tel:412-680-093=
9" target=3D"_blank" rel=3D"noreferrer">412-680-0939</a></span></div><div><=
span style=3D"background-color:rgba(255,255,255,0)">=C2=A0</span></div></di=
v></div>_______________________________________________<br>
<a href=3D"mailto:[email-masked]" target=3D"_blank" rel=3D"noreferrer"=
>[email-masked]</a><br>
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</blockquote></div>

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