[TR] Compression

[Dan Cronin]

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


On Oct 16, 2018, at 7:55 AM, DAVID MASSEY <dave1massey at cs.com> 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 <mark at bradakis.com>
To: triumphs <triumphs at autox.team.net>
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’s 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       24.4 ** triumphs at autox.team.net <mailto:triumphs at autox.team.net> ** Donate: http://www.team.net/donate.html <http://www.team.net/donate.html> Archive: http://www.team.net/pipermail/triumphs <http://www.team.net/pipermail/triumphs> http://www.team.net/archive <http://www.team.net/archive> 
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