Subject: Re: [TR] TR3 coil question

From: "Kinderlehrer" <[email-masked]>
Date: Thu, 17 Sep 2015 13:56:17 -0700

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Hi Andrew,

My understanding is that the TR3 uses a non-ballasted 3.5 ohm coil, but
that's stock. But, if you are frying coils, I would suspect the voltage
regulator. You don't say if you have a generator or upgraded to an
alternator, but in either case, I would guess that if the voltage isn't
being controlled, it could result in an excess of power, particularly at
high revs, and the symptoms you are experiencing.

Just my guess,

Bob

From: Triumphs [mailto:[email-masked]] On Behalf Of Andrew
Uprichard
Sent: Thursday, September 17, 2015 1:41 PM
To: [email-masked]
Subject: [TR] TR3 coil question

I recently finished the restoration of a '57 small-mouth with a number of
upgrades / modifications including oversize pistons, ported head, lightened
flywheel, SU HS6 carbs with long intake manifold, and a 1,2,3 distributor.

The car runs great, but I seem to be frying coils, usually after pushing the
revs.

The first time it happened, I called 1,2,3 and they reminded me I had to use
a coil with more than 1.0 (and ideally more than 1.5) ohms resistance and no
external ballast.  I tried a regular Lucas coil and all was well until I
took the car to a rolling road yesterday and we ran it up to 5500 rpm.  (By
the way, the carburetion was fine  throughout the rev range, so I don't
think this is a fuel issue).  The car performed well on the dyno, but on the
way home started to backfire on acceleration, the same symptoms I have had
twice before and have been "cured" by replacing the coil.

This time I have ordered a Bosch Blue, 3.5 ohm coil, as recommended by
1,2,3.

If it happens again, I think I will revert to a standard points or Pertronix
set-up and see how the car runs, but I was wondering if anyone had had a
similar experience or might have any suggestions.

Andrew Uprichard

P.S.  The one thing we did observe at the rolling road was there was too
much advance:  around 10 degrees at idle and 35 degrees (25 added by the
!,2,3 distributor) at 4000 rpm. Although the car wasn't pinging, it did
flatten out around 4500 where one might have expected more power.  I can't
see how too much advance could be a culprit, but I am open to any thoughts.

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vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'color:#1F497D'>Hi Andrew,<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:#1F497D'>My understanding is that =
the TR3 uses a non-ballasted 3.5 ohm coil, but that&#8217;s stock. But, =
if you are frying coils, I would suspect the voltage regulator. You =
don&#8217;t say if you have a generator or upgraded to an alternator, =
but in either case, I would guess that if the voltage isn&#8217;t being =
controlled, it could result in an excess of power, particularly at high =
revs, and the symptoms you are experiencing.<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'color:#1F497D'>Just my =
guess,<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'color:#1F497D'>Bob<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'color:#1F497D'><o:p>&nbsp;</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:"Tahoma","sans-serif"'>From:</span>=
</b><span style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> =
Triumphs [mailto:[email-masked]] <b>On Behalf Of =
</b>Andrew Uprichard<br><b>Sent:</b> Thursday, September 17, 2015 1:41 =
PM<br><b>To:</b> [email-masked]<br><b>Subject:</b> [TR] TR3 =
coil question<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>I recently =
finished the restoration of a &#8217;57 small-mouth with a number of =
upgrades / modifications including oversize pistons, ported head, =
lightened flywheel, SU HS6 carbs with long intake manifold, and a 1,2,3 =
distributor.<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>The car runs great, but I seem to be frying coils, =
usually after pushing the revs.<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>The first =
time it happened, I called 1,2,3 and they reminded me I had to use a =
coil with more than 1.0 (and ideally more than 1.5) ohms resistance and =
no external ballast.&nbsp; I tried a regular Lucas coil and all was well =
until I took the car to a rolling road yesterday and we ran it up to =
5500 rpm.&nbsp; (By the way, the carburetion was fine&nbsp; throughout =
the rev range, so I don&#8217;t think this is a fuel issue).&nbsp; The =
car performed well on the dyno, but on the way home started to backfire =
on acceleration, the same symptoms I have had twice before and have been =
&#8220;cured&#8221; by replacing the coil.<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>This time I =
have ordered a Bosch Blue, 3.5 ohm coil, as recommended by =
1,2,3.<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>If it happens again, I think I will revert to a =
standard points or Pertronix &nbsp;set-up and see how the car runs, but =
I was wondering if anyone had had a similar experience or might have any =
suggestions.<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>Andrew Uprichard<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>P.S.&nbsp; =
The one thing we did observe at the rolling road was there was too much =
advance:&nbsp; around 10 degrees at idle and 35 degrees (25 added by the =
!,2,3 distributor) at 4000 rpm. Although the car wasn&#8217;t pinging, =
it did flatten out around 4500 where one might have expected more =
power.&nbsp; I can&#8217;t see how too much advance could be a culprit, =
but I am open to any thoughts.<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div></body></html>
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** [email-masked] **

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

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---

From: Frank Fisher <[email-masked]>
Date: Thu, 17 Sep 2015 21:07:58 +0000 (UTC)

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cant help with the coil problem
but inquiring minds want to know hp and torque
:_)
frank

      From: Andrew Uprichard <[email-masked]>
 To: [email-masked]=20
 Sent: Thursday, September 17, 2015 1:41 PM
 Subject: [TR] TR3 coil question
  =20
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4895570876 {margin:1.0in 1.0in 1.0in 1.0in;}#yiv4895570876 div.yiv489557087=
6WordSection1 {}-->I recently finished the restoration of a =E2=80=9957 sma=
ll-mouth with a number of upgrades / modifications including oversize pisto=
ns, ported head, lightened flywheel, SU HS6 carbs with long intake manifold=
, and a 1,2,3 distributor. =C2=A0The car runs great, but I seem to be fryin=
g coils, usually after pushing the revs. =C2=A0The first time it happened, =
I called 1,2,3 and they reminded me I had to use a coil with more than 1.0 =
(and ideally more than 1.5) ohms resistance and no external ballast.=C2=A0 =
I tried a regular Lucas coil and all was well until I took the car to a rol=
ling road yesterday and we ran it up to 5500 rpm.=C2=A0 (By the way, the ca=
rburetion was fine=C2=A0 throughout the rev range, so I don=E2=80=99t think=
 this is a fuel issue).=C2=A0 The car performed well on the dyno, but on th=
e way home started to backfire on acceleration, the same symptoms I have ha=
d twice before and have been =E2=80=9Ccured=E2=80=9D by replacing the coil.=
 =C2=A0This time I have ordered a Bosch Blue, 3.5 ohm coil, as recommended =
by 1,2,3. =C2=A0If it happens again, I think I will revert to a standard po=
ints or Pertronix =C2=A0set-up and see how the car runs, but I was wonderin=
g if anyone had had a similar experience or might have any suggestions. =C2=
=A0Andrew Uprichard =C2=A0P.S.=C2=A0 The one thing we did observe at the ro=
lling road was there was too much advance:=C2=A0 around 10 degrees at idle =
and 35 degrees (25 added by the !,2,3 distributor) at 4000 rpm. Although th=
e car wasn=E2=80=99t pinging, it did flatten out around 4500 where one migh=
t have expected more power.=C2=A0 I can=E2=80=99t see how too much advance =
could be a culprit, but I am open to any thoughts. =C2=A0

[email-masked]

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<html><body><div style=3D"color:#000; background-color:#fff; font-family:He=
lveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;fo=
nt-size:16px"><div dir=3D"ltr"><span>cant help with the coil problem</span>=
</div><div dir=3D"ltr"><span><br></span></div><div dir=3D"ltr" id=3D"yui_3_=
16_0_1_1442518461053_15429"><span id=3D"yui_3_16_0_1_1442518461053_15430">b=
ut inquiring minds want to know hp and torque</span></div><div dir=3D"ltr" =
id=3D"yui_3_16_0_1_1442518461053_15428"><span><br></span></div><div dir=3D"=
ltr" id=3D"yui_3_16_0_1_1442518461053_15427"><span>:_)</span></div><div dir=
=3D"ltr" id=3D"yui_3_16_0_1_1442518461053_15426"><span><br></span></div><di=
v dir=3D"ltr" id=3D"yui_3_16_0_1_1442518461053_15425"><span>frank</span></d=
iv><div dir=3D"ltr" id=3D"yui_3_16_0_1_1442518461053_15424"><span><br></spa=
n></div><div dir=3D"ltr" id=3D"yui_3_16_0_1_1442518461053_15423"><span><br>=
</span></div><br>  <div style=3D"font-family: HelveticaNeue, Helvetica Neue=
, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id=3D"yui_=
3_16_0_1_1442518461053_15402"> <div style=3D"font-family: HelveticaNeue, He=
lvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;=
" id=3D"yui_3_16_0_1_1442518461053_15401"> <div dir=3D"ltr" id=3D"yui_3_16_=
0_1_1442518461053_15417"> <hr size=3D"1">  <font size=3D"2" face=3D"Arial" =
id=3D"yui_3_16_0_1_1442518461053_15433"> <b><span style=3D"font-weight:bold=
;">From:</span></b> Andrew Uprichard &lt;[email-masked]&gt;<br> <=
b><span style=3D"font-weight: bold;">To:</span></b> [email-masked]=
 <br> <b><span style=3D"font-weight: bold;">Sent:</span></b> Thursday, Sept=
ember 17, 2015 1:41 PM<br> <b><span style=3D"font-weight: bold;">Subject:</=
span></b> [TR] TR3 coil question<br> </font> </div> <div class=3D"y_msg_con=
tainer" id=3D"yui_3_16_0_1_1442518461053_15400"><br><div id=3D"yiv489557087=
6"><style><!--
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=09{}
--></style><div id=3D"yui_3_16_0_1_1442518461053_15399"><div class=3D"yiv48=
95570876WordSection1" id=3D"yui_3_16_0_1_1442518461053_15398"><div class=3D=
"yiv4895570876MsoNormal" id=3D"yui_3_16_0_1_1442518461053_15434">I recently=
 finished the restoration of a =E2=80=9957 small-mouth with a number of upg=
rades / modifications including oversize pistons, ported head, lightened fl=
ywheel, SU HS6 carbs with long intake manifold, and a 1,2,3 distributor.</d=
iv><div class=3D"yiv4895570876MsoNormal" id=3D"yui_3_16_0_1_1442518461053_1=
5435"> &nbsp;</div><div class=3D"yiv4895570876MsoNormal" id=3D"yui_3_16_0_1=
_1442518461053_15403">The car runs great, but I seem to be frying coils, us=
ually after pushing the revs.</div><div class=3D"yiv4895570876MsoNormal"> &=
nbsp;</div><div class=3D"yiv4895570876MsoNormal" id=3D"yui_3_16_0_1_1442518=
461053_15397">The first time it happened, I called 1,2,3 and they reminded =
me I had to use a coil with more than 1.0 (and ideally more than 1.5) ohms =
resistance and no external ballast.&nbsp; I tried a regular Lucas coil and =
all was well until I took the car to a rolling road yesterday and we ran it=
 up to 5500 rpm.&nbsp; (By the way, the carburetion was fine&nbsp; througho=
ut the rev range, so I don=E2=80=99t think this is a fuel issue).&nbsp; The=
 car performed well on the dyno, but on the way home started to backfire on=
 acceleration, the same symptoms I have had twice before and have been =E2=
=80=9Ccured=E2=80=9D by replacing the coil.</div><div class=3D"yiv489557087=
6MsoNormal"> &nbsp;</div><div class=3D"yiv4895570876MsoNormal">This time I =
have ordered a Bosch Blue, 3.5 ohm coil, as recommended by 1,2,3.</div><div=
 class=3D"yiv4895570876MsoNormal"> &nbsp;</div><div class=3D"yiv4895570876M=
soNormal">If it happens again, I think I will revert to a standard points o=
r Pertronix &nbsp;set-up and see how the car runs, but I was wondering if a=
nyone had had a similar experience or might have any suggestions.</div><div=
 class=3D"yiv4895570876MsoNormal"> &nbsp;</div><div class=3D"yiv4895570876M=
soNormal">Andrew Uprichard</div><div class=3D"yiv4895570876MsoNormal"> &nbs=
p;</div><div class=3D"yiv4895570876MsoNormal">P.S.&nbsp; The one thing we d=
id observe at the rolling road was there was too much advance:&nbsp; around=
 10 degrees at idle and 35 degrees (25 added by the !,2,3 distributor) at 4=
000 rpm. Although the car wasn=E2=80=99t pinging, it did flatten out around=
 4500 where one might have expected more power.&nbsp; I can=E2=80=99t see h=
ow too much advance could be a culprit, but I am open to any thoughts.</div=
><div class=3D"yiv4895570876MsoNormal"> &nbsp;</div></div></div></div><br><=
br>** <a ymailto=3D"mailto:[email-masked]" href=3D"mailto:triumphs=
@autox.team.net">[email-masked]</a> **<br><br>Donate: <a href=3D"h=
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