Subject: Re: [Fot] Six cylinder cams

From: "R. John Lye" <[email-masked]>
Date: Sun, 01 Nov 2015 14:45:34 -0500

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I definitely agree with this.=C2=A0 All my trailers have gotten winches
soon after purchase once I realized how useful they are. 
=C2=A0
John

On Sat, 31 Oct 2015 19:59:45 -0400, Scott Janzen  wrote:

       Agree with the winch. Especially useful for hauling broken cars 
on. One of the best things I did for my trailer. 

Sent from my mobile device=C2=A0

On Oct 31, 2015, at 7:24 PM, Spitfire Racing  wrote:

Putting a car on and off a trailer is what winches are made for. 
That=E2=80=99s the stuff that buggers clutches also. 
=C2=A0
Russ
=C2=A0
=C2=A0
From: Fot [mailto:[email-masked]] On Behalf Of McKearn McKearn
Sent: Saturday, October 31, 2015 6:45 PM
To: Duncan Charlton
Cc: Mike Piggot (new); FOT list
Subject: Re: [Fot] Six cylinder cams
=C2=A0
=C2=A0
I can tell you that I already have a GT6 with a good flexible power 
band and good reliability. It lacks quickness=C2=A0however,=C2=A0due in par=
t to 
the TR6 engine=C2=A0which is not highly tuned=C2=A0=C2=A0and I'm sure the g=
earing 
could be better (3.27 rearend-Toyota T50 trans.)( Good for the 
highway.)=C2=A0My old car is pretty much=C2=A0to the point where I don't wa=
nt 
to do anything more to it=C2=A0so I want to move on to another 
project.=C2=A0=C2=A0This time=C2=A0I want to build a car that snorts . I do=
 however 
need to put it on and off the trailer and I'm not thrilled about 
breaking parts with max. RPMs so I can't afford to go all out.=C2=A0 I'm 
looking for quickness through the gears and good handling.=C2=A0
=C2=A0
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 P.J.=C2=A0
=C2=A0
=C2=A0
On Sat, Oct 31, 2015 at 3:43 PM, Duncan Charlton  wrote:
=C2=A0
Larry=E2=80=99s comments make me wonder the precise intended purpose of the=
 
engine mentioned by the original poster.=C2=A0 =E2=80=9CTrack days=E2=80=9D=
 might mean 
different things to different people.=C2=A0 Does P. J. want a good flexible=
 
power band, or does he need an ultimate dyno horsepower figure?=C2=A0 Does 
the motor have the gear set to be able to take advantage of an engine 
with very little low-end torque? How high among his priorities is the 
ability to be able to drive the car back on the trailer at the end of 
every track weekend?=C2=A0 Lack of sponsorship and cash prizes mean that I 
must find the setup that maximizes the fun/cost ratio. 

Duncan

> On Oct 31, 2015, at 1:34 PM, Larry Young  wrote:
>
> That is an interesting article, but only speaks to one side of the 
> issue.=C2=A0 I always say that you want to pick an intake duration for an=
 
> RPM range that you're willing and able to turn. We all know what 
> happens to a stock TR4 crank which sees >6,000 on a regular basis.=C2=A0 
> Some guys want a cam good beyond 7,000, but they are just not willing 
> to push it that far. Nowadays I'm more of a street car guy, but still 
> like to have power.=C2=A0 I don't believe the choices should be to do 
> nothing or go all the way to race specs.=C2=A0 From 1968 on Triumphs were=
 
> severely detuned to pass emissions.=C2=A0 Compression ratio and duration 
> and hence cam overlap at TDC were reduced.=C2=A0 For example, the early 
> TR250/6 had 193 degrees duration (measured at 0.050), while the TR4 
> was about 215 and the early PI TR5/6 was 226. It seems crazy to 
> rebuild a street car of this era to the original specs.=C2=A0 Bumping the=
 
> compression ratio by a point and increasing the duration to something 
> like 210-215 will make the engine the way it would have been without 
> emission restrictions.=C2=A0 I would not feel guilty about polluting the 
> planet, since most of these cars see few miles annually and most of 
> the other pollution controls (e.g. ignition retard) probably quit 
> working years ago. 
> - Larry
>
> On 10/29/2015 7:25 AM, Duncan Charlton wrote:
>> Cam specs and static CR are interactive.=C2=A0 This will give you a 
>> rundown if you are not already knowledgeable about this subject:
>>
>> http://www.crankshaftcoalition.com/wiki/Cam_and_compression_ratio_compat=
ibility
>>
>> Duncan
>> (Texas)
>>
>>
>
> _______________________________________________
> [email-masked]
>
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=C2=A0
=C2=A0
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m

-------------------------

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--
Thanks,
John

[email-masked]
=C2=A0

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ta-hsystem=3D"true"></head>
<body><style>p{margin: 0;padding: 0;}

</style>
<p>I definitely agree with this.=C2=A0 All my trailers have gotten winches<=
/p>
<p>soon after purchase once I realized how useful they are.</p>
<p>=C2=A0</p>
<p>John<br><br>On Sat, 31 Oct 2015 19:59:45 -0400, Scott Janzen
&lt;[email-masked]&gt; wrote:</p>
<blockquote style=3D"border-left: 2px solid #000000; padding-right: 0px;
padding-left: 5px; margin-left: 5px; margin-right: 0px;">
<div id=3D"html-message"><meta>
<div>Agree with the winch. Especially useful for hauling broken cars on. On=
e of
the best things I did for my trailer.<br><br>Sent from my mobile device=C2=
=A0</div>
<div><br>On Oct 31, 2015, at 7:24 PM, Spitfire Racing &lt;<a href=3D"mailto=
:[email-masked]" target=3D"">[email-masked]</a>=
&gt; wrote:<br><br>
</div>
<div><meta>
<meta name=3D"Generator">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size: 11.0pt; font-family:
'Calibri','sans-serif'; color: #1f497d;">Putting a car on and off a trailer=
 is
what winches are made for. That=E2=80=99s the stuff that buggers clutches
also.</span></p>
<p>=C2=A0</p>
<p class=3D"MsoNormal"><span style=3D"font-size: 11.0pt; font-family:
'Calibri','sans-serif'; color: #1f497d;">Russ</span></p>
<p>=C2=A0</p>
<p>=C2=A0</p>
<div style=3D"border: none; border-top: solid #B5C4DF 1.0pt; padding: 3.0pt=
 0in
0in 0in;">
<p class=3D"MsoNormal"><strong><span style=3D"font-size: 10.0pt; font-famil=
y:
'Tahoma','sans-serif';">From:</span></strong><span style=3D"font-size: 10.0=
pt;
font-family: 'Tahoma','sans-serif';"> Fot [<a href=3D"mailto:fot-bounces@au=
tox.team.net" target=3D"">mailto:[email-masked]</a>] <strong>On=
 Behalf Of
</strong>McKearn McKearn<br><strong>Sent:</strong> Saturday, October 31, 20=
15
6:45 PM<br><strong>To:</strong> Duncan Charlton<br><strong>Cc:</strong> Mik=
e
Piggot (new); FOT list<br><strong>Subject:</strong> Re: [Fot] Six cylinder
cams</span></p>
<p>=C2=A0</p>
</div>
<p>=C2=A0</p>
<div>
<div>
<p class=3D"MsoNormal">I can tell you that I already have a GT6 with a good
flexible power band and good reliability. It lacks quickness=C2=A0however,=
=C2=A0due in
part to the TR6 engine=C2=A0which is not highly tuned=C2=A0=C2=A0and I'm su=
re the gearing
could be better (3.27 rearend-Toyota T50 trans.)( Good for the highway.)=C2=
=A0My old
car is pretty much=C2=A0to the point where I don't want to do anything more=
 to
it=C2=A0so I want to move on to another project.=C2=A0=C2=A0This time=C2=A0=
I want to build a car
that snorts . I do however need to put it on and off the trailer and I'm no=
t
thrilled about breaking parts with max. RPMs so I can't afford to go all ou=
t.=C2=A0
I'm looking for quickness through the gears and good handling.=C2=A0</p>
<p>=C2=A0</p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0
P.J.=C2=A0</p>
<p>=C2=A0</p>
</div>
</div>
<div>
<p>=C2=A0</p>
<div>
<p class=3D"MsoNormal">On Sat, Oct 31, 2015 at 3:43 PM, Duncan Charlton &lt=
;<a href=3D"mailto:[email-masked]" target=3D"_blank">duncan.ch=
[email-masked]</a>&gt; wrote:</p>
<p>=C2=A0</p>
<p class=3D"MsoNormal" style=3D"margin-bottom: 12.0pt;">Larry=E2=80=99s com=
ments make me
wonder the precise intended purpose of the engine mentioned by the original
poster.=C2=A0 =E2=80=9CTrack days=E2=80=9D might mean different things to d=
ifferent people.=C2=A0
Does P. J. want a good flexible power band, or does he need an ultimate dyn=
o
horsepower figure?=C2=A0 Does the motor have the gear set to be able to tak=
e
advantage of an engine with very little low-end torque? How high among his
priorities is the ability to be able to drive the car back on the trailer a=
t the
end of every track weekend?=C2=A0 Lack of sponsorship and cash prizes mean =
that I
must find the setup that maximizes the fun/cost
ratio.<br><br>Duncan<br><br><br>&gt; On Oct 31, 2015, at 1:34 PM, Larry You=
ng
&lt;<a href=3D"mailto:[email-masked]" target=3D"">[email-masked]<=
/a>&gt;
wrote:<br>&gt;<br>&gt; That is an interesting article, but only speaks to o=
ne
side of the issue.=C2=A0 I always say that you want to pick an intake durat=
ion for
an RPM range that you're willing and able to turn. We all know what happens=
 to a
stock TR4 crank which sees &gt;6,000 on a regular basis.=C2=A0 Some guys wa=
nt a cam
good beyond 7,000, but they are just not willing to push it that far. Nowad=
ays
I'm more of a street car guy, but still like to have power.=C2=A0 I don't b=
elieve
the choices should be to do nothing or go all the way to race specs.=C2=A0 =
>From 1968
on Triumphs were severely detuned to pass emissions.=C2=A0 Compression rati=
o and
duration and hence cam overlap at TDC were reduced.=C2=A0 For example, the =
early
TR250/6 had 193 degrees duration (measured at 0.050), while the TR4 was abo=
ut
215 and the early PI TR5/6 was 226. It seems crazy to rebuild a street car =
of
this era to the original specs.=C2=A0 Bumping the compression ratio by a po=
int and
increasing the duration to something like 210-215 will make the engine the =
way
it would have been without emission restrictions.=C2=A0 I would not feel gu=
ilty
about polluting the planet, since most of these cars see few miles annually=
 and
most of the other pollution controls (e.g. ignition retard) probably quit
working years ago.<br>&gt; - Larry<br>&gt;<br>&gt; On 10/29/2015 7:25 AM, D=
uncan
Charlton wrote:<br>&gt;&gt; Cam specs and static CR are interactive.=C2=A0 =
This will
give you a rundown if you are not already knowledgeable about this
subject:<br>&gt;&gt;<br>&gt;&gt; <a href=3D"http://www.crankshaftcoalition.=
com/wiki/Cam_and_compression_ratio_compatibility" target=3D"_blank">http://=
www.crankshaftcoalition.com/wiki/Cam_and_compression_ratio_compatibility</a=
><br>&gt;&gt;<br>&gt;&gt;
Duncan<br>&gt;&gt; (Texas)<br>&gt;&gt;<br>&gt;&gt;<br>&gt;<br>&gt;
_______________________________________________<br>&gt; <a href=3D"mailto:f=
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<p>=C2=A0</p>
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<p>=C2=A0</p>
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<p><br><br></p>
<p><br> --<br>Thanks,<br> John<br><br><br> [email-masked]</p>
<p>=C2=A0</p>

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