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I'm running valve seat pressure of 110 lbs closed and 285 lbs open @.
500 lift on my TR6 race engine.
On Sep 16, 2015, at 8:57 AM, Kas Kastner wrote:
>
> Never be beaten by equipment.
>
>
> ---------- Forwarded message ----------
> From: Kas Kastner <kaskastner@gmail.com>
> Date: Wed, Sep 16, 2015 at 6:53 AM
> Subject: Re: [Fot] FW: TR6 Cannon Intake Manifold
> To: Van Mulders Marcel <van.mulders.marcel@telenet.be>
>
>
> The camshaft is the thing that has to determine the spring pressure,
> but to me, it seems way way way too light. My TR-3-4 engines with my
> G-3 camshaft had 135 pounds on the seat and about 320 open pressure.
> I realize this will sound out of bounds for you but rev range and
> how much RPM you intend to use will be a factor.
>
> Do not let them talk you out of the 45mm carbs and I used 40mm
> chokes in both the TR-6 engine and even the GT-6 engine even ran on
> the dyno with NO VERNTRI and made more power but limited the low rpm
> smoothness so I never raced it that way... the factory 1147cc
> Spitfire engines for Le Mans and Sebring had 45 mm Webers and made
> 3% more power.
>
> Never be beaten by equipment.
>
>
> On Wed, Sep 16, 2015 at 1:18 AM, Van Mulders Marcel
> <van.mulders.marcel@telenet.be
> > wrote:
> Thanks to the Fot members for their reactions : most are warnings
> that triple 45 Webers may be too big on a TR6 engine. But it is a
> race engine (2720cc) and the owner has already bought 3 good
> secondhand 45 Webers with identical progression holes : 36mm main
> venturi's seem to be a reasonable starting point in this case? If
> necessary, he can go down to 34mm in 45 Webers.
> I've seen TR6 racecars with 45 Webers and I wonder if the Cannon
> manifold, with 40mm diameter bores on the carburetor side, can be
> reamed to 45mm?
> Another question : the valve seat pressure on my TR4A racecar is 35
> kgs/77 lbs. I've also a cylinderhead with only 25 kgs/55lbs seat
> pressure. The springs on both cylinderheads are 5.25kg/mm (290lbs/").
> Do you think 25kgs seat pressure is enough?
> Marcel
>
>
> Van: Van Mulders Marcel [mailto:van.mulders.marcel@telenet.be]
> Verzonden: woensdag 9 september 2015 17:32
> Aan: 'fot@autox.team.net'
> Onderwerp: TR6 Cannon Intake Manifold
>
> I have to install triple Webers DCOE 45 on a TR6 engine. The owner
> has also provided a Cannon one piece intake manifold with balance
> pipes. The bore of the runners is 40mm on the carburettor side and
> 31.5mm on the cylinderhead side.
> Can these runners be reamed to 45mm/34mm? If not, are there other
> inlet manifolds available?
> Marcel.
>
> _______________________________________________
> fot@autox.team.net
>
> http://www.fot-racing.com
>
> Donate: http://www.team.net/donate.html
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>
>
>
>
>
> _______________________________________________
> fot@autox.team.net
>
> http://www.fot-racing.com
>
> Donate: http://www.team.net/donate.html
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>
Allen Washatko
#6 Triumph TR6
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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; ">I'm running valve seat pressure =
of 110 lbs closed and 285 lbs open @.500 lift on my TR6 race =
engine.<br><div><div>On Sep 16, 2015, at 8:57 AM, Kas Kastner =
wrote:</div><br class=3D"Apple-interchange-newline"><blockquote =
type=3D"cite"><div dir=3D"ltr"><br clear=3D"all"><div><div =
class=3D"gmail_signature"><p><strong><font color=3D"#000099">Never be =
beaten by equipment.</font></strong></p></div></div> <br><div =
class=3D"gmail_quote">---------- Forwarded message ----------<br>From: =
<b class=3D"gmail_sendername">Kas Kastner</b> <span dir=3D"ltr"><<a =
href=3D"mailto:kaskastner@gmail.com";>kaskastner@gmail.com</a>></span><b=
r>Date: Wed, Sep 16, 2015 at 6:53 AM<br>Subject: Re: [Fot] FW: TR6 =
Cannon Intake Manifold<br>To: Van Mulders Marcel <<a =
href=3D"mailto:van.mulders.marcel@telenet.be";>van.mulders.marcel@telenet.b=
e</a>><br><br><br><div dir=3D"ltr"><div>The camshaft is the thing =
that has to determine the spring pressure, but to me, it seems way way =
way too light. My TR-3-4 engines with my G-3 camshaft had 135 pounds on =
the seat and about 320 open pressure. I realize this will sound =
out of bounds for you but rev range and how much RPM you intend to use =
will be a factor.</div><div><br></div><div>Do not let them talk you out =
of the 45mm carbs and I used 40mm chokes in both the TR-6 engine and =
even the GT-6 engine even ran on the dyno with NO VERNTRI and made more =
power but limited the low rpm smoothness so I never raced it that way... =
the factory <strong>1147cc</strong> <strong>Spitfire</strong> engines =
for Le Mans and Sebring had 45 mm Webers and made 3% more =
power.</div></div><div class=3D"gmail_extra"><br =
clear=3D"all"><div><div><p><strong><font color=3D"#000099">Never be =
beaten by equipment.</font></strong></p></div></div> <br><div =
class=3D"gmail_quote">On Wed, Sep 16, 2015 at 1:18 AM, Van Mulders =
Marcel <span dir=3D"ltr"><<a =
href=3D"mailto:van.mulders.marcel@telenet.be"; =
target=3D"_blank">van.mulders.marcel@telenet.be</a>></span> =
wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px =
0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-widt=
h:1px;border-left-style:solid"><u></u> <div> <div align=3D"left" =
dir=3D"ltr"><font color=3D"#0000ff" face=3D"Arial" size=3D"2"><span>Thanks=
to the Fot members for their reactions : most are warnings that =
triple 45 Webers may be too big on a TR6 engine. But it is a race engine =
(2720cc) and the owner has already bought 3 good secondhand 45 =
Webers with identical progression holes : 36mm main =
venturi's seem to be a reasonable starting point in this =
case? </span></font><font color=3D"#0000ff" face=3D"Arial" =
size=3D"2"><span>If necessary, he can go down to 34mm in 45 =
Webers.</span></font></div> <div align=3D"left" dir=3D"ltr"><font =
color=3D"#0000ff" face=3D"Arial" size=3D"2"><span> I've seen TR6 =
racecars with 45 Webers and I wonder if the Cannon manifold, =
with 40mm diameter bores on the carburetor side, can be reamed =
to 45mm? </span></font></div> <div align=3D"left" dir=3D"ltr"><font =
color=3D"#0000ff" face=3D"Arial" size=3D"2"><span>Another question : the =
valve seat pressure on my TR4A racecar is 35 kgs/77 lbs. I've also =
a cylinderhead with only 25 kgs/55lbs seat pressure. The springs on both =
cylinderheads are 5.25kg/mm (290lbs/").</span></font></div> <div =
align=3D"left" dir=3D"ltr"><font color=3D"#0000ff" face=3D"Arial" =
size=3D"2"><span>Do you think 25kgs seat pressure is =
enough?</span></font></div> <div align=3D"left" dir=3D"ltr"><font =
color=3D"#0000ff" face=3D"Arial" =
size=3D"2"><span>Marcel</span></font></div> <div align=3D"left" =
dir=3D"ltr"><font color=3D"#0000ff" face=3D"Arial" =
size=3D"2"><span></span></font> </div><br> <div align=3D"left" =
lang=3D"nl" dir=3D"ltr"> <hr> <font face=3D"Tahoma" size=3D"2"><b>Van:</b>=
Van Mulders Marcel [mailto:<a =
href=3D"mailto:van.mulders.marcel@telenet.be"; =
target=3D"_blank">van.mulders.marcel@telenet.be</a>] =
<br><b>Verzonden:</b> woensdag 9 september 2015 17:32<br><b>Aan:</b> '<a =
href=3D"mailto:fot@autox.team.net"; =
target=3D"_blank">fot@autox.team.net</a>'<br><b>Onderwerp:</b> TR6 =
Cannon Intake Manifold<br></font><br></div> <div></div> <div><font =
face=3D"Arial" size=3D"2"><span>I have to install triple Webers =
DCOE 45 on a TR6 engine. The owner has also provided a Cannon one piece =
intake manifold with balance pipes. The bore of the =
runners is 40mm on the carburettor side and 31.5mm on the =
cylinderhead side.</span></font></div> <div><font face=3D"Arial" =
size=3D"2"><span>Can these runners be reamed to 45mm/34mm? If not, are =
there other inlet manifolds available?</span></font></div><span><font =
color=3D"#888888"> <div><font face=3D"Arial" =
size=3D"2"><span>Marcel.</span></font></div></font></span></div> =
<br>_______________________________________________<br> <a =
href=3D"mailto:fot@autox.team.net"; =
target=3D"_blank">fot@autox.team.net</a><br> <br> <a =
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rel=3D"noreferrer">http://www.fot-racing.com</a><br> <br> Donate: <a =
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ail.com</a><br> <br> <br> <br></blockquote></div><br></div> =
</div><br></div> _______________________________________________<br><a =
href=3D"mailto:fot@autox.team.net";>fot@autox.team.net</a><br><br>http://ww=
w.fot-racing.com<br><br>Donate: =
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/blockquote></div><br><div> <span class=3D"Apple-style-span" =
style=3D"border-collapse: separate; color: rgb(0, 0, 0); font-family: =
Helvetica; font-style: normal; font-variant: normal; font-weight: =
normal; letter-spacing: normal; line-height: normal; orphans: 2; =
text-align: -webkit-auto; text-indent: 0px; text-transform: none; =
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0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: =
auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div =
style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space; "><div><div>Allen =
Washatko</div><div>#6 Triumph =
TR6</div><div><br></div></div><br></div></span><br =
class=3D"Apple-interchange-newline"> </div><br></body></html>=
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