Subject: Re: [TR] Lightening TR3 Flywheel

From: davehogye <[email-masked]>
Date: Sun, 10 Jan 2016 05:00:11 +0000 (UTC)

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Very informative drawings. Pretty neat. 
The lighter of the factory flywheels, weigh 29 lbs. with ring gear. The heavier unit weighs 34 lbs. 
With the availability of new light flywheels, I wouldn't consider lightening a stock unit. 
Both steel and aluminum flywheels are available new. BPNorthwest has them. Both weigh less than 10lbs. without the ring gear. Bolt on ring gear is extra. Summit might have a better price on the aluminum Fidanza. Fidanza is probably supplying BPN. 
The steel flywheels are drilled for TR4A-TR6 pressure plate, but don't let that stop you from making this change. The later diaphragm pressure plate is also lighter and improved. The aluminum units are drilled for both TR3s and the later 4A-6 pressure plates. Other considerations...aluminum flywheels have a replaceable friction surface and steel units should to be resurfaced when changing the clutch disc. I would recommend balancing new flywheels. The pressure plate too. Balancing isn't really necessary for a street car, but it wouldn't hurt. 
The lighter the smoother the better. 

Dave H. 

----- Original Message -----

From: "Randall" <[email-masked]> 
To: "Bill Brewer" <[email-masked]> 
Cc: [email-masked] 
Sent: Saturday, January 9, 2016 2:42:09 PM 
Subject: Re: [TR] Lightening TR3 Flywheel 

> ISTR that there are instructions somewhere on lightening 
> a stock TR3 flywheel. Anyone on the list have it? I don't 
> have Kastner's competition prep book. I did find a grainy 
> instruction diagram in Vizard's competition prep book. 

Here's what I have. The Kastner books I checked don't give details for lightening. 

You might try talking to Joe Alexander. ISTR he said he had a shop that knew how to remove 7 lb or so. He did a run of lightweight 
steel flywheels made, but I think they're all gone and I've not heard that he plans to get more made. 

Of course, there's always the alloy Fidanza, available through Summit and others. I've been very happy with mine, but there are 
some concerns so that may be more than you want for your Morgan. The racers seem to have a hard time keeping them on the crank, but 
that hasn't been an issue for me on the street. I still had to heat it up with a torch to get it off the old 3A motor, after 
roughly 50K miles. (The instructions note that it is a light press fit onto the crankshaft and suggest using heat to remove it.) 

Randall 

** [email-masked] ** 

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

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<html><body><div style=3D"font-family: Arial; font-size: 12pt; color: #0000=
00"><div aria-label=3D"Compose body"><span style=3D"font-size: 12pt;">Very =
informative drawings. &nbsp;Pretty neat.</span></div><div aria-label=3D"Com=
pose body">The lighter of the factory flywheels, weigh 29 lbs. with ring ge=
ar. &nbsp;The heavier unit weighs 34 lbs.</div><div aria-label=3D"Compose b=
ody">With the availability of new light flywheels, I wouldn't consider ligh=
tening a stock unit.</div><div aria-label=3D"Compose body">Both steel and a=
luminum flywheels are available new. &nbsp;BPNorthwest has them. &nbsp;Both=
 weigh less than 10lbs. without the ring gear. &nbsp;Bolt on ring gear is e=
xtra. &nbsp;Summit might have a better price on the aluminum Fidanza. &nbsp=
;Fidanza is probably supplying BPN.</div><div aria-label=3D"Compose body">T=
he steel flywheels are drilled for TR4A-TR6 pressure plate, but don't let t=
hat stop you from making this change. &nbsp;The later diaphragm pressure pl=
ate is also lighter and improved. &nbsp;The aluminum units are drilled for =
both TR3s and the later 4A-6 pressure plates. &nbsp;Other considerations...=
aluminum flywheels have a replaceable friction surface and steel units shou=
ld to be resurfaced when changing the clutch disc. <span style=3D"font-size=
: 12pt;">I would recommend balancing new flywheels. &nbsp;The pressure plat=
e too. &nbsp;Balancing isn't really necessary for a street car, but it woul=
dn't hurt.</span></div><div aria-label=3D"Compose body"><span style=3D"font=
-size: 12pt;">The lighter the smoother the better.</span></div><div aria-la=
bel=3D"Compose body"><span style=3D"font-size: 12pt;"><br></span></div><div=
 aria-label=3D"Compose body"><span style=3D"font-size: 12pt;">Dave H.</span=
></div><div aria-label=3D"Compose body"><span style=3D"font-size: 12pt;"><b=
r></span></div><div aria-label=3D"Compose body"><span style=3D"font-size: 1=
2pt;"><br></span></div><div><br></div><hr id=3D"zwchr"><div style=3D"color:=
#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:=
Helvetica,Arial,sans-serif;font-size:12pt;" data-mce-style=3D"color: #000; =
font-weight: normal; font-style: normal; text-decoration: none; font-family=
: Helvetica,Arial,sans-serif; font-size: 12pt;"><b>From: </b>"Randall" &lt;=
[email-masked]&gt;<br><b>To: </b>"Bill Brewer" &lt;billbrewer59@yahoo.=
com&gt;<br><b>Cc: </b>[email-masked]<br><b>Sent: </b>Saturday, Jan=
uary 9, 2016 2:42:09 PM<br><b>Subject: </b>Re: [TR] Lightening TR3 Flywheel=
<br><div><br></div><br>&gt; &nbsp; &nbsp; &nbsp;ISTR that there are instruc=
tions somewhere on lightening <br>&gt; a stock TR3 flywheel. Anyone on the =
list have it? I don't <br>&gt; have Kastner's competition prep book. I did =
find a grainy <br>&gt; instruction diagram in Vizard's competition prep boo=
k.<br><div><br></div>Here's what I have. &nbsp;The Kastner books I checked =
don't give details for lightening. <br><div><br></div>You might try talking=
 to Joe Alexander. &nbsp;ISTR he said he had a shop that knew how to remove=
 7 lb or so. &nbsp;He did a run of lightweight<br>steel flywheels made, but=
 I think they're all gone and I've not heard that he plans to get more made=
.<br><div><br></div>Of course, there's always the alloy Fidanza, available =
through Summit and others. &nbsp;I've been very happy with mine, but there =
are<br>some concerns so that may be more than you want for your Morgan. &nb=
sp;The racers seem to have a hard time keeping them on the crank, but<br>th=
at hasn't been an issue for me on the street. &nbsp;I still had to heat it =
up with a torch to get it off the old 3A motor, after<br>roughly 50K miles.=
 &nbsp;(The instructions note that it is a light press fit onto the cranksh=
aft and suggest using heat to remove it.)<br><div><br></div>Randall<br><div=
><br></div><br>** [email-masked] **<br><div><br></div>Donate: http=
://www.team.net/donate.html<br>Archive: http://www.team.net/archive<br>Foru=
ms: http://www.team.net/forums<br>Unsubscribe/Manage: http://autox.team.net=
/mailman/options/triumphs/[email-masked]<br></div><div><br></div></div=
></body></html>
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** [email-masked] **

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

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From: Gregory Donovan <[email-masked]>
Date: Sun, 10 Jan 2016 17:08:17 +0000 (UTC)

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The advantages of a lighter flywheel are pretty clear. Faster acceleration =
=3D more fun.

Once you have a lighter flywheel installed and balanced, etc., are there an=
y long-term disadvantages?=C2=A0
E.g. does that extra mass in the flywheel help absorb vibration that is now=
 absorbed by something else in a flywheel-lightened car?
--Greg
=20

      From: Randall <[email-masked]>

>=C2=A0 =C2=A0 =C2=A0 ISTR that there are instructions somewhere on lighten=
ing=20
> a stock TR3 flywheel. Anyone on the list have it? I don't=20
> have Kastner's competition prep book. I did find a grainy=20

Here's what I have.=C2=A0 The Kastner books I checked don't give details fo=
r lightening.=20

You might try talking to Joe Alexander.=C2=A0 ISTR he said he had a shop th=
at knew how to remove 7 lb or so.=C2=A0 He did a run of lightweight
steel flywheels made, but I think they're all gone and I've not heard that =
he plans to get more made.

Of course, there's always the alloy Fidanza, available through Summit and o=
thers.=C2=A0 I've been very happy with mine, but there are
some concerns so that may be more than you want for your Morgan.=C2=A0 The =
racers seem to have a hard time keeping them on the crank, but
that hasn't been an issue for me on the street.=C2=A0 I still had to heat i=
t up with a torch to get it off the old 3A motor, after
roughly 50K miles.=C2=A0 (The instructions note that it is a light press fi=
t onto the crankshaft and suggest using heat to remove it.)

Randall

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<html><head></head><body><div style=3D"color:#000; background-color:#fff; f=
ont-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, =
sans-serif;font-size:16px"><div id=3D"yui_3_16_0_1_1452403640116_20023">The=
 advantages of a lighter flywheel are pretty clear. Faster acceleration =3D=
 more fun.<br></div><div id=3D"yui_3_16_0_1_1452403640116_20025"><br></div>=
<div id=3D"yui_3_16_0_1_1452403640116_20024">Once you have a lighter flywhe=
el installed and balanced, etc., are there any long-term disadvantages?&nbs=
p;</div><div id=3D"yui_3_16_0_1_1452403640116_20024"><br></div><div id=3D"y=
ui_3_16_0_1_1452403640116_20024">E.g. does that extra mass in the flywheel =
help absorb vibration that is now absorbed by something else in a flywheel-=
lightened car?</div><div id=3D"yui_3_16_0_1_1452403640116_20024"><br></div>=
<div id=3D"yui_3_16_0_1_1452403640116_20024">--Greg<br></div> <div class=3D=
"qtdSeparateBR" id=3D"yui_3_16_0_1_1452403640116_19979"><br><br></div><div =
class=3D"yahoo_quoted" id=3D"yui_3_16_0_1_1452403640116_19956" style=3D"dis=
play: block;">  <div style=3D"font-family: HelveticaNeue, Helvetica Neue, H=
elvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id=3D"yui_3_1=
6_0_1_1452403640116_19955"> <div style=3D"font-family: HelveticaNeue, Helve=
tica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" i=
d=3D"yui_3_16_0_1_1452403640116_19954"> <div dir=3D"ltr" id=3D"yui_3_16_0_1=
_1452403640116_19953"> <font size=3D"2" face=3D"Arial" id=3D"yui_3_16_0_1_1=
452403640116_19957"> <hr size=3D"1" id=3D"yui_3_16_0_1_1452403640116_19978"=
> <b><span style=3D"font-weight:bold;">From:</span></b> Randall &lt;TR3driv=
[email-masked]&gt;<br></font></div><div dir=3D"ltr" id=3D"yui_3_16_0_1_145240=
3640116_19953"><font size=3D"2" face=3D"Arial"><br></font></div><div class=
=3D"y_msg_container" id=3D"yui_3_16_0_1_1452403640116_19966">&gt;&nbsp; &nb=
sp; &nbsp; ISTR that there are instructions somewhere on lightening <br>&gt=
; a stock TR3 flywheel. Anyone on the list have it? I don't <br>&gt; have K=
astner's competition prep book. I did find a grainy <br>&gt; instruction di=
agram in Vizard's competition prep book.<br><br>Here's what I have.&nbsp; T=
he Kastner books I checked don't give details for lightening. <br><br>You m=
ight try talking to Joe Alexander.&nbsp; ISTR he said he had a shop that kn=
ew how to remove 7 lb or so.&nbsp; He did a run of lightweight<br>steel fly=
wheels made, but I think they're all gone and I've not heard that he plans =
to get more made.<br><br>Of course, there's always the alloy Fidanza, avail=
able through Summit and others.&nbsp; I've been very happy with mine, but t=
here are<br>some concerns so that may be more than you want for your Morgan=
.&nbsp; The racers seem to have a hard time keeping them on the crank, but<=
br>that hasn't been an issue for me on the street.&nbsp; I still had to hea=
t it up with a torch to get it off the old 3A motor, after<br>roughly 50K m=
iles.&nbsp; (The instructions note that it is a light press fit onto the cr=
ankshaft and suggest using heat to remove it.)<br><br>Randall<br><br></div>=
 </div> </div>  </div></div></body></html>
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