Subject: Re: [TR] Compression

From: Dan Cronin <[email-masked]>
Date: Tue, 16 Oct 2018 10:52:30 -0400

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Anyone have this information for the TR3-4a series motors?

On Oct 16, 2018, at 7:55 AM, DAVID MASSEY <[email-masked]> wrote:

Mark, for some reason, some messages get stripped of LF's and CR's and =
an ascii table such as the one you sent don't display properly.  I took =
the liberty of putting the data into a spreadsheet and taking an image =
attached below.

Did I get this right?  Also note I added a column for per-cylinder =
displacement which is critical for calculating compression ratio.

Dave Massey

-----Original Message-----
From: Mark J Bradakis <[email-masked]>
To: triumphs <[email-masked]>
Sent: Mon, Oct 15, 2018 7:31 pm
Subject: Re: [TR] Compression

On 10/15/18 9:09 AM, Carl Carlson wrote: > Can anyone tell me where the =
TR250 & early TR6 engine gets it=E2=80=99s high compression as the bore =
& stroke is the same as the latter engine? > Application       CR    =
Thickness   CC depth   CC volume GT6 Mk I        9.50 GT6+            =
9.25     3.450     0.425       34 GT6 Mk III      9.25     3.32       =
.47        37 (early) GT6 Mk III      8.0      3.40       .55        44 =
(late) TR250, TR6      8.5      3.55       .60        48.5 TR6 middle    =
  7.75     3.54       .68        55 TR6 late        7.5      3.55       =
.70        57 TR6 race 1     10.25     3.375      .52        41.6 TR6 =
race 2     12.3      3.295      .44        33 GT6 race 1     10.75     =
3.31       .385       30 GT6 race 2     12.75     3.22       .300       =
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D""><font=
 color=3D"#4f7a28" class=3D"">Anyone have this information for the =
TR3-4a series motors?</font><div class=3D""><font color=3D"#4f7a28" =
class=3D""><span style=3D"caret-color: rgb(79, 122, 40);" class=3D""><br =
class=3D""></span></font><div><br class=3D""><div class=3D"">On Oct 16, =
2018, at 7:55 AM, DAVID MASSEY &lt;<a href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><font size=3D"3" =
face=3D"Arial, Helvetica, sans-serif" class=3D"">
<div class=3D""> <font size=3D"3" class=3D"">Mark, for some reason, some =
messages get stripped of LF's and CR's and an ascii table such as the =
one you sent don't display properly.&nbsp; I took the liberty of putting =
the data into a spreadsheet and taking an image attached =
below.</font></div>

<div class=3D""><font size=3D"3" class=3D""><br class=3D"">
</font></div>

<div class=3D""><font size=3D"3" class=3D""><img =
src=3D"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAhgAAADRCAIAAAABnlwSA=
HN5LpoOcJevwBaCHQwcsYlrYOQif+B4I5wxTBkZHWAAAAAElFTkSuQmCC" alt=3D"" =
class=3D""><br class=3D"">
</font></div>

<div class=3D""><br class=3D"">
</div>

<div class=3D""><font size=3D"3" class=3D"">Did I get this right?&nbsp; =
Also note I added a column for per-cylinder displacement which is =
critical for calculating compression ratio.</font><br class=3D"">
<font size=3D"3" class=3D""></font></div>

<div class=3D""> <br class=3D"">
</div>

<div class=3D""> <br class=3D"">
</div>

<div style=3D"clear:both" class=3D""><font size=3D"4" class=3D"">Dave =
Massey</font><br class=3D"">
<br class=3D"">
</div>

<div class=3D""> <br class=3D"">
</div>

<div class=3D""> <br class=3D"">
</div>

<div style=3D"font-family: arial, helvetica; font-size: 10pt;" =
class=3D"">-----Original Message-----<br class=3D"">
From: Mark J Bradakis &lt;<a href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>&gt;<br class=3D"">
To: triumphs &lt;<a href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>&gt;<br class=3D"">
Sent: Mon, Oct 15, 2018 7:31 pm<br class=3D"">
Subject: Re: [TR] Compression<br class=3D"">
<br class=3D"">
On 10/15/18 9:09 AM, Carl Carlson wrote:
&gt; Can anyone tell me where the TR250 &amp; early TR6 engine gets =
it=E2=80=99s high compression as the bore &amp; stroke is the same as =
the latter engine?
&gt;
Application&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; CR&nbsp;&nbsp;&nbsp; =
Thickness&nbsp;&nbsp; CC depth&nbsp;&nbsp; CC volume

GT6 Mk I&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 9.50
GT6+&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
9.25&nbsp;&nbsp;&nbsp;&nbsp; 3.450&nbsp;&nbsp;&nbsp;&nbsp; =
0.425&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 34
GT6 Mk III&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 9.25&nbsp;&nbsp;&nbsp;&nbsp; =
3.32&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
.47&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 37
(early)
GT6 Mk III&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
8.0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
3.40&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
.55&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 44
(late)
TR250, TR6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
8.5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
3.55&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
.60&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 48.5
TR6 middle&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 7.75&nbsp;&nbsp;&nbsp;&nbsp; =
3.54&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
.68&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 55
TR6 late&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
7.5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
3.55&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
.70&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 57
TR6 race 1&nbsp;&nbsp;&nbsp;&nbsp; 10.25&nbsp;&nbsp;&nbsp;&nbsp; =
3.375&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
.52&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 41.6
TR6 race 2&nbsp;&nbsp;&nbsp;&nbsp; 12.3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
3.295&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
.44&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 33
GT6 race 1&nbsp;&nbsp;&nbsp;&nbsp; 10.75&nbsp;&nbsp;&nbsp;&nbsp; =
3.31&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
.385&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 30
GT6 race 2&nbsp;&nbsp;&nbsp;&nbsp; 12.75&nbsp;&nbsp;&nbsp;&nbsp; =
3.22&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
.300&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 24.4

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