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Absolutely right Richard but you are have missed my point.
M
On Tue., Sep. 7, 2021, 5:59 p.m. richard mayor, <boyracer466@gmail.com>
wrote:
> Michael,
>
> Comparing the weight of fuel in the gas tank to rotational mass is like
> comparing apples to bananas.
>
> Richard
>
>
> On Tue, Sep 7, 2021 at 2:24 PM Michael Salter <michaelsalter@gmail.com>
> wrote:
>
>> The total mass of the flywheel is not completely relevant insofar as
>> engine moment of inertia is concerned.
>> What is important is the mass removed times the square of the radius, so
>> just how much weight has been removed per se is not important.
>> Secondly removing rotational inertia is not always the best thing to do,
>> if it was you can be assured that manufacturers would be all over it as =
a
>> way to save money.
>> The rotational mass is often designed in to protect the drive train, in
>> particular the gearbox.
>> Read this:
>> https://www.netbug.net/blogmichael/2017/01/03/austin-healey-100-crank-fa=
ilures/
>> Thirdly lightening a flywheel in of itself has very little effect on
>> acceleration. An engine with a lightened flywheel may accelerate to 600=
0
>> RPM 1 - 2 seconds more quickly but that doesn't necessarily equate to 1-=
2
>> seconds faster to 60 MPH. You may be able to shift marginally faster if =
the
>> gearbox can stand the extra loads and the 4 to 5 pounds off vehicle weig=
ht
>> is really only the equivalent of half a tank of fuel. (Who ever notices
>> that their car accelerates more quickly with a half full gas tank).
>>
>> Just sayin'
>>
>> M
>>
>> On Tue., Sep. 7, 2021, 4:17 p.m. Earl Kagna via Healeys, <
>> healeys@autox.team.net> wrote:
>>
>>> I have Bill Bolton lightened flywheels in both my Healeys. According t=
o
>>> Kent Lambert, who took over Bills Healey business awhile back, the stoc=
k
>>> weight (6 cyl) is 28.5 pounds, and Bills machining program reduced them=
to
>>> 24.
>>>
>>>
>>>
>>> Both of my cars run just fine, no problems at all in the 20 + or so
>>> years that I=E2=80=99ve had them installed.
>>>
>>>
>>>
>>> Earl Kagna
>>>
>>> Victoria BC
>>>
>>> BJ8, BT7 tri-carb
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> *From:* Healeys <healeys-bounces@autox.team.net> *On Behalf Of *richard
>>> mayor
>>> *Sent:* Tuesday, September 7, 2021 10:23 AM
>>> *To:* healeys <healeys@autox.team.net>
>>> *Subject:* [Healeys] Lightened flywheels
>>>
>>>
>>>
>>> 6 cylinder flywheels vary slightly but are all generally in the 29 poun=
d
>>> range. Very aggressive machine work can get the weight down to the 22-2=
3
>>> pound range.
>>>
>>> How much weight you take off will affect your driving style. To maintai=
n
>>> the feel of a stock Healey while still improving the engines response, =
I
>>> suggest removing no more than 3 pounds.
>>>
>>>
>>>
>>> Richard
>>>
>>>
>>> <https://www.avast.com/sig-email?utm_medium=3Demail&utm_source=3Dlink&u=
tm_campaign=3Dsig-email&utm_content=3Demailclient> Virus-free.
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<div dir=3D"auto">Absolutely right Richard=C2=A0 but you are have missed my=
point.<div dir=3D"auto"><br></div><div dir=3D"auto">M</div></div><br><div =
class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Tue., Sep. 7=
, 2021, 5:59 p.m. richard mayor, <<a href=3D"mailto:boyracer466@gmail.co=
m">boyracer466@gmail.com</a>> 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"ltr"><div>Michael, <br></div><div><br></div><div>Comparing=
the weight of fuel in the gas tank to rotational mass is like comparing ap=
ples to bananas. <br></div><div><br></div><div>Richard<br></div><div><br></=
div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_at=
tr">On Tue, Sep 7, 2021 at 2:24 PM Michael Salter <<a href=3D"mailto:mic=
haelsalter@gmail.com" target=3D"_blank" rel=3D"noreferrer">michaelsalter@gm=
ail.com</a>> wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"=
margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-lef=
t:1ex"><div dir=3D"auto">The total mass of the flywheel is not completely r=
elevant insofar as engine moment of inertia is concerned.<div dir=3D"auto">=
What is important is the mass removed times the square of the radius, so ju=
st how much weight has been removed per se is not important.=C2=A0</div><di=
v dir=3D"auto">Secondly removing rotational inertia is not always the best =
thing to do, if it was you can be assured that manufacturers would be all o=
ver it as a way to save money.</div><div dir=3D"auto">The rotational mass i=
s often designed in to protect the drive train, in particular the gearbox.<=
/div><div dir=3D"auto">Read this:=C2=A0 <a href=3D"https://www.netbug.net/b=
logmichael/2017/01/03/austin-healey-100-crank-failures/" target=3D"_blank" =
rel=3D"noreferrer">https://www.netbug.net/blogmichael/2017/01/03/austin-hea=
ley-100-crank-failures/</a></div><div dir=3D"auto">Thirdly lightening a fly=
wheel in of itself has very little effect on acceleration.=C2=A0 An engine =
with a lightened flywheel may accelerate to 6000 RPM 1 - 2 seconds more qui=
ckly but that doesn't necessarily equate to 1-2 seconds faster to 60 MP=
H. You may be able to shift marginally faster if the gearbox can stand the =
extra loads and the 4 to 5 pounds off vehicle weight is really only the equ=
ivalent of half a tank of fuel. (Who ever notices that their car accelerate=
s more quickly with a half full gas tank).</div><div dir=3D"auto"><br></div=
><div dir=3D"auto">Just sayin'</div><div dir=3D"auto"><br></div><div di=
r=3D"auto">M</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" cla=
ss=3D"gmail_attr">On Tue., Sep. 7, 2021, 4:17 p.m. Earl Kagna via Healeys, =
<<a href=3D"mailto:healeys@autox.team.net"; rel=3D"noreferrer noreferrer"=
target=3D"_blank">healeys@autox.team.net</a>> wrote:<br></div><blockquo=
te class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px =
solid rgb(204,204,204);padding-left:1ex"><div lang=3D"EN-US"><div><p class=
=3D"MsoNormal">I have Bill Bolton lightened flywheels in both my Healeys.=
=C2=A0 According to Kent Lambert, who took over Bills Healey business awhil=
e back, the stock weight (6 cyl) is 28.5 pounds, and Bills machining progra=
m reduced them to 24.<u></u><u></u></p><p class=3D"MsoNormal"><u></u>=C2=A0=
<u></u></p><p class=3D"MsoNormal">Both of my cars run just fine, no problem=
s at all in the 20 + or so years that I=E2=80=99ve had them installed.<u></=
u><u></u></p><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"Mso=
Normal">Earl Kagna<u></u><u></u></p><p class=3D"MsoNormal">Victoria BC<u></=
u><u></u></p><p class=3D"MsoNormal">BJ8, BT7 tri-carb<u></u><u></u></p><p c=
lass=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNormal"><u></u>=
=C2=A0<u></u></p><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><div style=
=3D"border-color:rgb(225,225,225) currentcolor currentcolor;border-style:so=
lid none none;border-width:1pt medium medium;padding:3pt 0in 0in"><p class=
=3D"MsoNormal"><b>From:</b> Healeys <<a href=3D"mailto:healeys-bounces@a=
utox.team.net" rel=3D"noreferrer noreferrer noreferrer" target=3D"_blank">h=
ealeys-bounces@autox.team.net</a>> <b>On Behalf Of </b>richard mayor<br>=
<b>Sent:</b> Tuesday, September 7, 2021 10:23 AM<br><b>To:</b> healeys <=
<a href=3D"mailto:healeys@autox.team.net"; rel=3D"noreferrer noreferrer nore=
ferrer" target=3D"_blank">healeys@autox.team.net</a>><br><b>Subject:</b>=
[Healeys] Lightened flywheels<u></u><u></u></p></div><p class=3D"MsoNormal=
"><u></u>=C2=A0<u></u></p><div><div><p class=3D"MsoNormal">6 cylinder flywh=
eels vary slightly but are all generally in the 29 pound range. Very aggres=
sive machine work can get the weight down to the 22-23 pound range. <u></u>=
<u></u></p></div><div><p class=3D"MsoNormal">How much weight you take off w=
ill affect your driving style. To maintain the feel of a stock Healey while=
still improving the engines response, I suggest removing no more than 3 po=
unds. <u></u><u></u></p></div><div><p class=3D"MsoNormal"><u></u>=C2=A0<u><=
/u></p></div><div><p class=3D"MsoNormal">Richard =C2=A0 <u></u><u></u></p><=
/div></div></div><div id=3D"m_2206703498914175201gmail-m_-54513475677065413=
58m_4102748135953362380m_-1299543942381278781DAB4FAD8-2DD7-40BB-A1B8-4E2AA1=
F9FDF2"><br>
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