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Just when I think I found the answer=E2=80=A6
Unfortunately BLMC compounded this by downgrading the steel used for the =
crank from EN40B to the far inferior EN16U.
I find this:
Triumph NEVER ever fitted a EN40B crankshaft to their engines.
The Mk3/1500 Spitfire and TR cranks were always made from EN16T.
AND THIS:
The story that different materials were used for the Spitfire crankshaft =
seems to be something of an urban myth - there is a widespread belief =
that early Spitfire engines used a crank made from EN40 steel as =
standard, and later ones used the cheaper, inferior EN16. I don't know =
where this story originated, but I reckon that someone has confused the =
Triumph 1300 engine with the BLMC Mini Cooper 'S' 1300 engine, which did =
use a crank made from EN40, up to around 1968. After that, even the =
Cooper 'S' used EN16 for the cranks, which were generally tuftrided to =
improve durability. To the best of my knowledge, all Triumph engines =
used EN16, it's just that the small crank 1300 engine had a lighter =
crank and lighter conrods - that's why it doesn't self-destruct like the =
1500. If you still believe the Mk3 Spit had an EN40 crank, just remember =
that exactly same crank (Stanpart 307422) was used in the Herald 13/60 =
saloon/sedan, and most of the Herald 1200 engines. Those models were =
produced in larger numbers than the Spitfire, had only a single carb, =
and were about 10BHP down on the Spit Mk2 and Mk3. Why would Triumph use =
a better material than absolutely necessary for a low powered saloon =
car?
Don
DON COUCH PHOTOGRAPHY
(512)-680-3540
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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; -webkit-line-break: after-white-space;" =
class=3D""><p style=3D"border: 0px; margin: 5px 0px 20px; padding: 0px; =
font-size: 14px; font-family: 'Droid Sans', sans-serif; line-height: =
22px;" class=3D""><b class=3D"">Just when I think I found the =
answer=E2=80=A6</b></p><p style=3D"border: 0px; margin: 5px 0px 20px; =
padding: 0px; font-size: 13px; font-family: 'Droid Sans', sans-serif; =
line-height: 22px; color: rgb(102, 102, 102);" class=3D""><span =
style=3D"color: rgb(93, 93, 93); background-color: rgb(255, 255, 255);" =
class=3D"">Unfortunately BLMC compounded this by downgrading the steel =
used for the crank from EN40B to the far inferior EN16U.</span></p><div =
style=3D"font-size: 14px;" class=3D""><b class=3D"">I find =
this:</b></div><div style=3D"font-size: 14px;" class=3D""><br =
class=3D""></div><p style=3D"border: 0px; margin: 5px 0px 20px; padding: =
0px; font-size: 13px; font-family: 'Droid Sans', sans-serif; =
line-height: 22px; color: rgb(102, 102, 102);" class=3D"">Triumph NEVER =
ever fitted a EN40B crankshaft to their engines.</p><p style=3D"border: =
0px; margin: 5px 0px 20px; padding: 0px; font-size: 13px; font-family: =
'Droid Sans', sans-serif; line-height: 22px; color: rgb(102, 102, 102);" =
class=3D"">The Mk3/1500 Spitfire and TR cranks were always made from =
EN16T.</p><div class=3D""><br class=3D""></div><div style=3D"font-size: =
14px;" class=3D""><b class=3D"">AND THIS:</b></div><div class=3D""><br =
class=3D""></div><div class=3D""><br class=3D""></div><div =
class=3D""><span style=3D"font-family: Arial, Helvetica, sans-serif; =
font-size: 14px; background-color: rgb(255, 255, 255);" class=3D"">The =
story that different materials were used for the Spitfire crankshaft =
seems to be something of an urban myth - there is a widespread belief =
that early Spitfire engines used a crank made from EN40 steel as =
standard, and later ones used the cheaper, inferior EN16. I don't know =
where this story originated, but I reckon that someone has confused the =
Triumph 1300 engine with the BLMC Mini Cooper 'S' 1300 engine, =
which </span><i style=3D"font-family: Arial, Helvetica, sans-serif; =
font-size: 14px;" class=3D"">did</i><span style=3D"font-family: Arial, =
Helvetica, sans-serif; font-size: 14px; background-color: rgb(255, 255, =
255);" class=3D""> use a crank made from EN40, up to around 1968. =
After that, even the Cooper 'S' used EN16 for the cranks, which were =
generally tuftrided to improve durability. To the best of my knowledge, =
all Triumph engines used EN16, it's just that the small crank 1300 =
engine had a lighter crank and lighter conrods - that's why it doesn't =
self-destruct like the 1500. If you still believe the Mk3 Spit had an =
EN40 crank, just remember that </span><i style=3D"font-family: =
Arial, Helvetica, sans-serif; font-size: 14px;" =
class=3D"">exactly</i><span style=3D"font-family: Arial, Helvetica, =
sans-serif; font-size: 14px; background-color: rgb(255, 255, 255);" =
class=3D""> same crank (Stanpart 307422) was used in the Herald =
13/60 saloon/sedan, and most of the Herald 1200 engines. Those models =
were produced in larger numbers than the Spitfire, had only a single =
carb, and were about 10BHP down on the Spit Mk2 and Mk3. Why would =
Triumph use a better material than absolutely necessary for a low =
powered saloon car?</span></div><div class=3D""><span =
style=3D"font-family: Arial, Helvetica, sans-serif; font-size: 14px; =
background-color: rgb(255, 255, 255);" class=3D""><br =
class=3D""></span></div><div class=3D""><span style=3D"font-family: =
Arial, Helvetica, sans-serif; font-size: 14px; background-color: =
rgb(255, 255, 255);" class=3D""><br class=3D""></span></div><div =
class=3D""><span style=3D"font-family: Arial, Helvetica, sans-serif; =
font-size: 14px; background-color: rgb(255, 255, 255);" =
class=3D"">Don</span></div><div class=3D""><span style=3D"font-family: =
Arial, Helvetica, sans-serif; font-size: 14px; background-color: =
rgb(255, 255, 255);" class=3D""><br class=3D""></span></div><div =
class=3D"">
<div class=3D"">DON COUCH PHOTOGRAPHY</div><div =
class=3D"">(512)-680-3540</div>
</div>
<br class=3D""></body></html>=
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Archive: http://www.team.net/archive
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