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Everyone should be aware this cam is ground on an original TR cam core, not=
a new blank. Ken
From: Fot <fot-bounces@autox.team.net> On Behalf Of Tony and Annie Garmey v=
ia Fot
Sent: Sunday, January 22, 2023 3:24 PM
To: Tony Drews <tony@tonydrews.com>
Cc: fot@autox.team.net
Subject: Re: [Fot] A cam for Rick
The Larry young DX cam profile is available at Webb Camshaft, Riverside Ca=
=2E
I=E2=80=99ve used this profile with a lot of success for multiple clients .=
Sent from my iPhone
On Jan 22, 2023, at 2:58 PM, Tony Drews via Fot <fot@autox.team.net <mailto=
:fot@autox.team.net> > wrote:
=EF=BB=BF
I was going to keep out of this one but am not capable of it. :)
I run Larry's original design cams. I'm not quite sure who is making them =
now - Ken Knight had some made last go-round. It's fast but not as peaky a=
s the Erson 24 - coming out of a turn at 3000 rpm is fine, 3500 is better, =
pulls through 6500 RPM, not sure where it drops off - haven't had the coura=
ge to rev that high.
Most of the front runners (to my knowledge at least) run the Erson 24. I r=
an a modified one of those (experimental) and hated that one because it was=
even worse at low RPM than the Erson.
We ran an Isky 666 cam early on and it might be more suitable for a less hi=
ghly stressed engine. It was tractable and pulled through 6000, not sure a=
bout higher - I suspect going over 6000 won't be worth it. With a built en=
gine, ported head, all the goodies it's not as fast / powerful as the Larry=
or Erson ones.
The Isky would be easier on the valve train. Larry's profile requires full=
diameter stock lifters - if you've gone with the GT40 lifters sleeved down=
it'll wipe the cam. One set of lifters I bought from BPNW they had put a =
chamfer around the edge to break the sharp edge and that was enough to wipe=
a cam too. It's pretty high lift so you need to have your ducks in a row =
for there not to be spring bind, have the seat pressures right, and conside=
r valves and springs a replaceable wear item. I suspect the same is true f=
or the Erson 24 grind as well. I believe there's an Erson 23 grind which i=
s less radical that might be an option.
I'm trying to point out possible "off the shelf" items that don't require y=
ou to send a profile to a cam grinder...
The Erson ones are hopefully still available from Brian Howlett / BFE / www=
=2EBritishFrameandEngine.com <http://www.BritishFrameandEngine.com> . Not =
sure who's making the Larry Young design ones now.
Cheers, Tony Drews
On 1/22/2023 11:30 AM, Larry Young via Fot wrote:
The numbers for Erson/BFE #24 mentioned by David and Henry is the last one =
in my list and has the longest duration. Like Henry said, if you drop below=
4,000 your dead.
I got interested in the history of cam design. According the Speedy Bill Sm=
ith (Speedway Motors) the real innovators after WWII were Ed Winfield and C=
ollins of Harmon-Collins (see the book "Souping the Stock Engine). He said =
their designs were heavily copied by the others. I think Kas's cams were de=
signed by someone from Harmon-Collins.
I certainly don't have the experience of many others on this list, but I'll=
contribute a few comments on what Rick has said. Cams is a subject that is=
mysterious (Rick said "black art") to many, so it is easy for them to be f=
ooled. There is nothing mysterious about it. I agree that most people put t=
o much emphasis on peak HP rather than the entire range you will operate in=
=2E
- Larry
On 1/22/2023 6:46 AM, David Gott via Fot wrote:
Hi FOT,
I used Larry Young=E2=80=99s site to learn a lot about cams and their relat=
ive effects on engine performance with some crude engine modeling software,=
in the quest to pick the right cam for my wants, building a strong mid ran=
ge engine, trying not to spin over 6,000 if I can help it with a stock base=
d crank. Does anyone happen to have the specs on the Gillander=E2=80=99s=
#24 they could share? Just curious. Maybe it=E2=80=99s at the pointy end=
of the list below?
Rick McCurdy, here=E2=80=99s the cam reference list Larry put together, bel=
ow, and I=E2=80=99d sure be curious what Rick Parent=E2=80=99s software wou=
ld say I should have done!!!
Triumph Cams <https://www.tildentechnologies.com/Cams/TriumphCams.html>
_______________________________________________
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
s.com
_______________________________________________
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
@msn.com
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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue vli=
nk=3Dpurple style=3D'word-wrap:break-word'><div class=3DWordSection1><p cla=
ss=3DMsoNormal>Everyone should be aware this cam is ground on an original T=
R cam core, not a new blank.=C2=A0 Ken<o:p></o:p></p><p class=3DMsoNormal><=
o:p> </o:p></p><div><div style=3D'border:none;border-top:solid #E1E1E1=
1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal><b>From:</b> Fot <=
;fot-bounces@autox.team.net> <b>On Behalf Of </b>Tony and Annie Garmey v=
ia Fot<br><b>Sent:</b> Sunday, January 22, 2023 3:24 PM<br><b>To:</b> Tony =
Drews <tony@tonydrews.com><br><b>Cc:</b> fot@autox.team.net<br><b>Sub=
ject:</b> Re: [Fot] A cam for Rick<o:p></o:p></p></div></div><p class=3DMso=
Normal><o:p> </o:p></p><p class=3DMsoNormal>The Larry young DX c=
am profile is available at Webb Camshaft, Riverside Ca. <o:p></o:p></=
p><div><p class=3DMsoNormal style=3D'margin-bottom:12.0pt'>I=E2=80=99ve use=
d this profile with a lot of success for multiple clients . <o:p></o:p=
></p><div><p class=3DMsoNormal>Sent from my iPhone<o:p></o:p></p></div><div=
><p class=3DMsoNormal><br><br><o:p></o:p></p><blockquote style=3D'margin-to=
p:5.0pt;margin-bottom:5.0pt'><p class=3DMsoNormal style=3D'margin-bottom:12=
=2E0pt'>On Jan 22, 2023, at 2:58 PM, Tony Drews via Fot <<a href=3D"mail=
to:fot@autox.team.net">fot@autox.team.net</a>> wrote:<o:p></o:p></p></bl=
ockquote></div><blockquote style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><=
div><p class=3DMsoNormal>=EF=BB=BF <o:p></o:p></p><p>I was going to keep ou=
t of this one but am not capable of it. :)<o:p></o:p></p><p>I run Lar=
ry's original design cams. I'm not quite sure who is making them now =
- Ken Knight had some made last go-round. It's fast but not as peaky =
as the Erson 24 - coming out of a turn at 3000 rpm is fine, 3500 is better,=
pulls through 6500 RPM, not sure where it drops off - haven't had the cour=
age to rev that high.<o:p></o:p></p><p>Most of the front runners (to my kno=
wledge at least) run the Erson 24. I ran a modified one of those (exp=
erimental) and hated that one because it was even worse at low RPM than the=
Erson.<o:p></o:p></p><p>We ran an Isky 666 cam early on and it might be mo=
re suitable for a less highly stressed engine. It was tractable and p=
ulled through 6000, not sure about higher - I suspect going over 6000 won't=
be worth it. With a built engine, ported head, all the goodies it's =
not as fast / powerful as the Larry or Erson ones.<o:p></o:p></p><p>The Isk=
y would be easier on the valve train. Larry's profile requires full d=
iameter stock lifters - if you've gone with the GT40 lifters sleeved down i=
t'll wipe the cam. One set of lifters I bought from BPNW they had put=
a chamfer around the edge to break the sharp edge and that was enough to w=
ipe a cam too. It's pretty high lift so you need to have your ducks i=
n a row for there not to be spring bind, have the seat pressures right, and=
consider valves and springs a replaceable wear item. I suspect the s=
ame is true for the Erson 24 grind as well. I believe there's an Erso=
n 23 grind which is less radical that might be an option.<o:p></o:p></p><p>=
I'm trying to point out possible "off the shelf" items that don't=
require you to send a profile to a cam grinder...<o:p></o:p></p><p>The Ers=
on ones are hopefully still available from Brian Howlett / BFE / <a href=3D=
"http://www.BritishFrameandEngine.com";>www.BritishFrameandEngine.com</a>.&n=
bsp; Not sure who's making the Larry Young design ones now.<o:p></o:p></p><=
p>Cheers, Tony Drews<o:p></o:p></p><div><p class=3DMsoNormal>On 1/22/2023 1=
1:30 AM, Larry Young via Fot wrote:<o:p></o:p></p></div><blockquote style=
=3D'margin-top:5.0pt;margin-bottom:5.0pt'><p class=3DMsoNormal>The numbers =
for Erson/BFE #24 mentioned by David and Henry is the last one in my list a=
nd has the longest duration. Like Henry said, if you drop below 4,000 your =
dead.<br><br>I got interested in the history of cam design. According the S=
peedy Bill Smith (Speedway Motors) the real innovators after WWII were Ed W=
infield and Collins of Harmon-Collins (see the book "Souping the Stock=
Engine). He said their designs were heavily copied by the others. I think =
Kas's cams were designed by someone from Harmon-Collins.<br><br>I certainly=
don't have the experience of many others on this list, but I'll contribute=
a few comments on what Rick has said. Cams is a subject that is mysterious=
(Rick said "black art") to many, so it is easy for them to be fo=
oled. There is nothing mysterious about it. I agree that most people put to=
much emphasis on peak HP rather than the entire range you will operate in.=
<br> - Larry <br><br><br>On 1/22/2023 6:46 AM, David Gott via Fot wrot=
e:<br><br><o:p></o:p></p><blockquote style=3D'margin-top:5.0pt;margin-botto=
m:5.0pt'><p class=3DMsoNormal>Hi FOT, <o:p></o:p></p><div><p class=3DMsoNor=
mal><o:p> </o:p></p></div><div><p class=3DMsoNormal>I used Larry Young=
=E2=80=99s site to learn a lot about cams and their relative effects on eng=
ine performance with some crude engine modeling software, in the quest to p=
ick the right cam for my wants, building a strong mid range engine, trying =
not to spin over 6,000 if I can help it with a stock based crank. &n=
bsp;Does anyone happen to have the specs on the Gillander=E2=80=99s #24 the=
y could share? Just curious. Maybe it=E2=80=99s at the pointy e=
nd of the list below?<o:p></o:p></p></div><div><p class=3DMsoNormal><o:p>&n=
bsp;</o:p></p></div><div><p class=3DMsoNormal>Rick McCurdy, here=E2=80=99s =
the cam reference list Larry put together, below, and I=E2=80=99d sure be c=
urious what Rick Parent=E2=80=99s software would say I should have done!!! =
<o:p></o:p></p></div><div><p class=3DMsoNormal><o:p> </o:p></p><=
/div><div><p class=3DMsoNormal><a href=3D"https://www.tildentechnologies.co=
m/Cams/TriumphCams.html" target=3D"_blank">Triumph Cams</a> <o:p></o:p=
></p></div><div><p class=3DMsoNormal><o:p> </o:p></p></div><p class=3D=
MsoNormal><o:p> </o:p></p></blockquote><p class=3DMsoNormal><br><br><b=
r><o:p></o:p></p><pre>_______________________________________________<o:p><=
/o:p></pre><pre><a href=3D"mailto:fot@autox.team.net";>fot@autox.team.net</a=
><o:p></o:p></pre><pre><o:p> </o:p></pre><pre><a href=3D"http://www.fo=
t-racing.com">http://www.fot-racing.com</a><o:p></o:p></pre><pre><o:p> =
;</o:p></pre><pre>Donate: <a href=3D"http://www.team.net/donate.html";>http:=
//www.team.net/donate.html</a><o:p></o:p></pre><pre>Archive: <a href=3D"htt=
p://autox.team.net/archive">http://autox.team.net/archive</a> <a href=3D"ht=
tp://www.team.net/pipermail/fot">http://www.team.net/pipermail/fot</a><o:p>=
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http://www.fot-racing.com
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