--===============6218842329237258169==
--000000000000720c6d05a45c2064
Content-Transfer-Encoding: quoted-printable
Wow 8000 R.P.M from a 100 engine ... I'd say that is very unlikely!
We managed to get a big valve, "S" head, short stroke engine up to 6200 but
nothing that we tried, despite hours of dyno work, could produce anything
like those revs.
Maybe with a very big blower and many spare cranks.
You can read about our attempts here.
<https://www.netbug.net/blogmichael/2007/03/19/building-a-100r-race-engine/=
>
M
On Tue, Apr 28, 2020 at 10:45 AM Hap Polk <happolk@cox.net> wrote:
> Perry,
>
> Ii was a Buick Straight-8 (Fireball 8) engine from 1931 to 1953. The smal=
l
> block version, up to 273 cubic inch capacity came with lifters and push
> rods that could be dropped in a Healey 4-cylinder. The lifters were
> considerably lighter, especially if one added an oil drain hole to the
> lubricate the cam and not have to lift a bucket of oil each revolution. T=
he
> push rods were slightly larger in diameter and appeared to my eye to be
> stronger. The Buick lifter and push rods coupled with Dodge valves and
> titanium valve spring caps was the hot set up. When joined by an Isky or
> Crane cam, rumors were a 4-cylider could touch 8,000 rpm for brief moment=
s.
> I was never able to verify the 8,000 rpm story told by some Southern
> California BMC dealers in the late 50s and early 60s. In 1961, I ran the
> Buick lifters and push rods with an Isky =C2=BE race cam in a ported head=
. My
> personal rpm limit remained 4,800 rpm. Mid-range torque was improved per =
my
> butt meter.
>
>
>
> The Healey-Hunter DOHC conversion engine race redline was 7,000 rpm. Thei=
r
> cranks were fully polished and ran with lighter pistons and rods. Avoidin=
g
> resonance frequencies, especially around 5,200 rpm was understood. In the=
ir
> very limited race life, no crank failures were noted, but rapid cam wear
> was.
>
>
>
> Does anyone know what race rpm limit some Healey 4-clynders engines are
> running these days with a steel billet crank, lighter internals, and a
> somewhat reinforcing cast aluminum sump?
>
> Hap Polk
>
> 100M
>
>
>
> *From:* Healeys <healeys-bounces@autox.team.net> *On Behalf Of *Perry via
> Healeys
> *Sent:* Monday, April 27, 2020 6:51 PM
> *To:* Wayne Schultz <waschu2@gmail.com>; healeys@autox.team.net
> *Subject:* Re: [Healeys] Oil Additives
>
>
>
> Listers / Wayne
>
> I was thinking about the way the cam lobes are lubricated in the original
> configuration ( stock parts). Please chime in if this is way off.
>
> It would seem most of the lubrication comes from the steady drip that
> comes out at the rocker and runs down the pushrod. First the tappets
> (lifters) get some oil, then passes by the lifter and then on to the cam
> lobe.
>
> The oil dripping from the rocker shaft bushings drips onto the top of the
> head and drops through the pushrod holes to the lifter gallery. On some
> worn out engines this is a flood instead of a drip. Then you have the oil
> fog that is in the crank case/oil pan area when the engine is running due
> to the squirt of oil coming out of the piston rods big ends. The intent w=
as
> to oil down the piston bores but coats pretty much everything.
>
> The bucket lifters, which by the way was an old hot rod trick from the
> early days of Austin Healeys, using lighter weight lifters out of a
> straight eight Oldsmobile (if I remember correctly) and longer pushrods m=
ay
> or may not be drilled to allow oil to the cam lobe/lifter face. Some guys
> used pressurized oil to squirt the interface when the bucket was not
> drilled. The bucket lifters sold years ago that did not have a hole in th=
e
> lifters had failure problems. A hole was added but the problem with the
> drilled hole in the bucket it could clog and there was little to no
> lubrication of the cam lobes, thus major wear.
>
> I=E2=80=99m not suggesting that the can lobe failure was caused by a plug=
ged hole
> in the lifter since I did not work on this engine. But it is a possibilit=
y.
>
> Perry
>
>
>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=3D550986> for
> Windows 10
>
>
>
> *From: *Wayne Schultz <waschu2@gmail.com>
> *Sent: *Monday, April 27, 2020 4:49 PM
> *To: *healeys@autox.team.net
> *Subject: *[Healeys] Oil Additives
>
>
>
> Hello everyone, I recently completed a rebuild of the engine in my Healey
> 3000. At 48K miles i noticed metal during an oil change. I dropped my oil
> pan and found even more metal and a silver ring in the block that lined u=
p
> with a cam lobe. I had been using Mobil 1 for years and always had good o=
il
> pressure and a very quiet motor. I pulled the motor and upon teardown I
> found one bad cam lobe and several lifters that had mild pitting. I
> thought about how I used my car and came to conclusion I, rather than th=
e
> oil might be the reason for the cam failure. I drove my car every coupl=
e
> of weeks in nice weather. This is just enough time for the oil to leave t=
he
> cam and lifters to drain into the pan. This meant the next time I started
> the engine the cam and lifters might have been metal on metal. My new
> lifters are short bucket lifters with a drain hole to lubricate the cam
> lobes. Now using VR-1 20/50
>
>
>
>
> _______________________________________________
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation $12.75
>
> Archive: http://www.team.net/pipermail/healeys
> http://autox.team.net/archive
>
> Healeys@autox.team.net
> http://autox.team.net/mailman/listinfo/healeys
>
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/healeys/michaelsalter@gmail.com
>
>
--000000000000720c6d05a45c2064
Content-Transfer-Encoding: quoted-printable
<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:comic sa=
ns ms,sans-serif;font-size:small">Wow 8000 R.P.M from a 100 engine ... I=
9;d say that is very unlikely!</div><div class=3D"gmail_default" style=3D"f=
ont-family:comic sans ms,sans-serif;font-size:small">We managed to get a bi=
g valve, "S" head, short stroke engine up to 6200 but nothing tha=
t we tried, despite hours of dyno work, could produce anything like those r=
evs.</div><div class=3D"gmail_default" style=3D"font-family:comic sans ms,s=
ans-serif;font-size:small">Maybe with a very big blower and many spare cran=
ks.<br></div><div class=3D"gmail_default" style=3D"font-family:comic sans m=
s,sans-serif;font-size:small">You can read about our attempts <a href=3D"ht=
tps://www.netbug.net/blogmichael/2007/03/19/building-a-100r-race-engine/">h=
ere.</a></div><div class=3D"gmail_default" style=3D"font-family:comic sans =
ms,sans-serif;font-size:small"><br></div><div class=3D"gmail_default" style=
=3D"font-family:comic sans ms,sans-serif;font-size:small">M<br></div></div>=
<br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Tue=
, Apr 28, 2020 at 10:45 AM Hap Polk <<a href=3D"mailto:happolk@cox.net";>=
happolk@cox.net</a>> wrote:<br></div><blockquote class=3D"gmail_quote" s=
tyle=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);pad=
ding-left:1ex"><div lang=3D"EN-US"><div class=3D"gmail-m_-54959316480284904=
71WordSection1"><p class=3D"MsoNormal">Perry,<u></u><u></u></p><p class=3D"=
MsoNormal">Ii was a Buick Straight-8 (Fireball 8) engine from 1931 to 1953.=
The small block version, up to 273 cubic inch capacity came with lifters a=
nd push rods that could be dropped in a Healey 4-cylinder. The lifters were=
considerably lighter, especially if one added an oil drain hole to the lub=
ricate the cam and not have to lift a bucket of oil each revolution. The pu=
sh rods were slightly larger in diameter and appeared to my eye to be stron=
ger. The Buick lifter and push rods coupled with Dodge valves and=C2=A0 tit=
anium valve spring caps was the hot set up. When joined by an Isky or Crane=
cam, rumors were a 4-cylider could touch 8,000 rpm for brief moments. I wa=
s never able to verify the 8,000 rpm story told by some Southern California=
BMC dealers in the late 50s and early 60s. In 1961, I ran the Buick lifter=
s and push rods with an Isky =C2=BE race cam in a ported head. My personal =
rpm limit remained 4,800 rpm. Mid-range torque was improved per my butt met=
er.<u></u><u></u></p><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p clas=
s=3D"MsoNormal">The Healey-Hunter DOHC conversion engine race redline was 7=
,000 rpm. Their cranks were fully polished and ran with lighter pistons and=
rods. Avoiding resonance frequencies, especially around 5,200 rpm was unde=
rstood. In their very limited race life, no crank failures were noted, but =
rapid cam wear was. <u></u><u></u></p><p class=3D"MsoNormal"><u></u>=C2=A0<=
u></u></p><p class=3D"MsoNormal">Does anyone know what race rpm limit some =
Healey 4-clynders engines are running these days with a steel billet crank,=
lighter internals, and a somewhat reinforcing cast aluminum sump?<u></u><u=
></u></p><p class=3D"MsoNormal">Hap Polk<u></u><u></u></p><p class=3D"MsoNo=
rmal">100M<u></u><u></u></p><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>=
<div><div style=3D"border-color:rgb(225,225,225) currentcolor currentcolor;=
border-style:solid none none;border-width:1pt medium medium;padding:3pt 0in=
0in"><p class=3D"MsoNormal"><b>From:</b> Healeys <<a href=3D"mailto:hea=
leys-bounces@autox.team.net" target=3D"_blank">healeys-bounces@autox.team.n=
et</a>> <b>On Behalf Of </b>Perry via Healeys<br><b>Sent:</b> Monday, Ap=
ril 27, 2020 6:51 PM<br><b>To:</b> Wayne Schultz <<a href=3D"mailto:wasc=
hu2@gmail.com" target=3D"_blank">waschu2@gmail.com</a>>; <a href=3D"mail=
to:healeys@autox.team.net" target=3D"_blank">healeys@autox.team.net</a><br>=
<b>Subject:</b> Re: [Healeys] Oil Additives<u></u><u></u></p></div></div><p=
class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNormal">Listers=
/ Wayne<u></u><u></u></p><p class=3D"MsoNormal">I was thinking about the w=
ay the cam lobes are lubricated in the original configuration ( stock parts=
). Please chime in if this is way off. <u></u><u></u></p><p class=3D"MsoNor=
mal">It would seem most of the lubrication comes from the steady drip that =
comes out at the rocker and runs down the pushrod. First the tappets (lifte=
rs) get some oil, then passes by the lifter and then on to the cam lobe. <u=
></u><u></u></p><p class=3D"MsoNormal">The oil dripping from the rocker sha=
ft bushings drips onto the top of the head and drops through the pushrod ho=
les to the lifter gallery. On some worn out engines this is a flood instead=
of a drip. Then you have the oil fog that is in the crank case/oil pan are=
a when the engine is running due to the squirt of oil coming out of the pis=
ton rods big ends. The intent was to oil down the piston bores but coats pr=
etty much everything.<u></u><u></u></p><p class=3D"MsoNormal">The bucket li=
fters, which by the way was an old hot rod trick from the early days of Aus=
tin Healeys, using lighter weight lifters out of a straight eight Oldsmobil=
e (if I remember correctly) and longer pushrods may or may not be drilled t=
o allow oil to the cam lobe/lifter face. Some guys used pressurized oil to =
squirt the interface when the bucket was not drilled. The bucket lifters so=
ld years ago that did not have a hole in the lifters had failure problems. =
A hole was added but the problem with the drilled hole in the bucket it cou=
ld clog and there was little to no lubrication of the cam lobes, thus major=
wear. =C2=A0<u></u><u></u></p><p class=3D"MsoNormal">I=E2=80=99m not sugge=
sting that the can lobe failure was caused by a plugged hole in the lifter =
since I did not work on this engine. But it is a possibility. <u></u><u></u=
></p><p class=3D"MsoNormal">Perry<u></u><u></u></p><p class=3D"MsoNormal"><=
u></u>=C2=A0<u></u></p><p class=3D"MsoNormal">Sent from <a href=3D"https://=
go.microsoft.com/fwlink/?LinkId=3D550986" target=3D"_blank">Mail</a> for Wi=
ndows 10<u></u><u></u></p><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><d=
iv style=3D"border-color:rgb(225,225,225) currentcolor currentcolor;border-=
style:solid none none;border-width:1pt medium medium;padding:3pt 0in 0in"><=
p class=3D"MsoNormal"><b>From: </b><a href=3D"mailto:waschu2@gmail.com"; tar=
get=3D"_blank">Wayne Schultz</a><br><b>Sent: </b>Monday, April 27, 2020 4:4=
9 PM<br><b>To: </b><a href=3D"mailto:healeys@autox.team.net"; target=3D"_bla=
nk">healeys@autox.team.net</a><br><b>Subject: </b>[Healeys] Oil Additives<u=
></u><u></u></p></div><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><div><=
p class=3D"MsoNormal">Hello everyone, I recently completed=C2=A0a rebuild o=
f the engine in my Healey 3000. At 48K miles i noticed metal during an oil =
change. I dropped my oil pan and found even more metal and a silver ring in=
the block that lined up with a cam lobe. I had been using Mobil 1 for year=
s and always had good oil pressure and a very quiet motor.=C2=A0 I pulled t=
he motor and upon teardown I found one bad cam lobe and several lifters tha=
t had mild pitting.=C2=A0 I thought about how I used my car and came to con=
clusion=C2=A0 I, rather than the oil might=C2=A0be=C2=A0the=C2=A0 reason fo=
r the cam failure.=C2=A0 I drove my car every couple of weeks in nice weath=
er. This is just enough time for the oil to leave the cam and lifters to dr=
ain into the pan. This meant the next time I started the engine the cam and=
lifters=C2=A0might have been metal on metal.=C2=A0 My new lifters are shor=
t bucket lifters with a drain hole to lubricate=C2=A0the cam lobes. Now usi=
ng VR-1 20/50<u></u><u></u></p></div><p class=3D"MsoNormal"><u></u>=C2=A0<u=
></u></p><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p></div></div>_______=
________________________________________<br>
rer" target=3D"_blank">http://www.team.net/donate.html</a><br>
<br>
Archive: <a href=3D"http://www.team.net/pipermail/healeys"; rel=3D"noreferre=
r" target=3D"_blank">http://www.team.net/pipermail/healeys</a> <a href=3D"h=
ttp://autox.team.net/archive" rel=3D"noreferrer" target=3D"_blank">http://a=
utox.team.net/archive</a><br>
<br>
<a href=3D"mailto:Healeys@autox.team.net"; target=3D"_blank">Healeys@autox.t=
eam.net</a><br>
<a href=3D"http://autox.team.net/mailman/listinfo/healeys"; rel=3D"noreferre=
r" target=3D"_blank">http://autox.team.net/mailman/listinfo/healeys</a><br>
<br>
s/michaelsalter@gmail.com" rel=3D"noreferrer" target=3D"_blank">http://auto=
x.team.net/mailman/options/healeys/michaelsalter@gmail.com</a><br>
<br>
</blockquote></div>
--000000000000720c6d05a45c2064--
--===============6218842329237258169==
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
_______________________________________________
Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archive
Healeys@autox.team.net
http://autox.team.net/mailman/listinfo/healeys
--===============6218842329237258169==--
|