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*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
> Archive: http://www.team.net/archive
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<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>F=
rom: <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 I=
ntake Manifold<br>To: Van Mulders Marcel <<a href=3D"mailto:van.mulders.=
marcel@telenet.be">van.mulders.marcel@telenet.be</a>><br><br><br><div di=
r=3D"ltr"><div>The camshaft is the thing that has to determine the spring p=
ressure, 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 r=
ealize this will sound=C2=A0 out of bounds for you but rev range and how mu=
ch 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 a=
nd made more power but limited the low rpm smoothness so I never raced it t=
hat way... the factory <strong>1147cc</strong> <strong>Spitfire</strong> en=
gines 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><f=
ont color=3D"#000099">Never be beaten by equipment.</font></strong></p></di=
v></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:<b=
r><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;paddi=
ng-left:1ex;border-left-color:rgb(204,204,204);border-left-width: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=20
are=C2=A0warnings that triple 45 Webers may be too big on a TR6 engine. But=
it=20
is a race engine (2720cc) and=C2=A0the owner has already bought 3=C2=A0good=
=20
secondhand 45 Webers with identical progression holes :=C2=A036mm=C2=A0main=
=20
venturi's=C2=A0seem=C2=A0 to be=C2=A0a reasonable starting point in thi=
s case?=20
</span></font><font color=3D"#0000ff" face=3D"Arial" size=3D"2"><span>If ne=
cessary, he can go down to 34mm in 45=20
Webers.</span></font></div>
<div align=3D"left" dir=3D"ltr"><font color=3D"#0000ff" face=3D"Arial" size=
=3D"2"><span>=C2=A0I've seen TR6 racecars with 45 Webers and I=20
wonder if the Cannon manifold, with=C2=A040mm diameter bores on the carbure=
tor=20
side,=C2=A0can 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=C2=A0seat pressure on my=20
TR4A racecar is 35 kgs/77 lbs. I've also a cylinderhead with only 25 kg=
s/55lbs=20
seat pressure. The springs on both cylinderheads are 5.25kg/mm=20
(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=20
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>=C2=A0</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=20
[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=20
september 2015 17:32<br><b>Aan:</b> '<a href=3D"mailto:fot@autox.team.n=
et" target=3D"_blank">fot@autox.team.net</a>'<br><b>Onderwerp:</b>=20
TR6 Cannon Intake Manifold<br></font><br></div>
<div></div>
<div><font face=3D"Arial" size=3D"2"><span>I have to install=20
triple=C2=A0 Webers DCOE 45 on a TR6 engine. The owner has also provided a=
=20
Cannon one piece intake manifold with=C2=A0balance pipes.=C2=A0The bore of =
the=20
runners=C2=A0is 40mm on the carburettor side and 31.5mm on the cylinderhead=
=20
side.</span></font></div>
<div><font face=3D"Arial" size=3D"2"><span>Can these runners be=20
reamed to 45mm/34mm? If not, are there other inlet manifolds=20
available?</span></font></div><span><font color=3D"#888888">
<div><font face=3D"Arial" size=3D"2"><span>Marcel.</span></font></div></fon=
t></span></div>
<br>_______________________________________________<br>
<a href=3D"mailto:fot@autox.team.net"; target=3D"_blank">fot@autox.team.net<=
/a><br>
<br>
<a href=3D"http://www.fot-racing.com"; target=3D"_blank" rel=3D"noreferrer">=
http://www.fot-racing.com</a><br>
<br>
=3D"noreferrer">http://www.team.net/donate.html</a><br>
Archive: <a href=3D"http://www.team.net/archive"; target=3D"_blank" rel=3D"n=
oreferrer">http://www.team.net/archive</a><br>
Forums: <a href=3D"http://www.team.net/forums"; target=3D"_blank" rel=3D"nor=
eferrer">http://www.team.net/forums</a><br>
skastner@gmail.com" target=3D"_blank" rel=3D"noreferrer">http://autox.team.=
net/mailman/options/fot/kaskastner@gmail.com</a><br>
<br>
<br>
<br></blockquote></div><br></div>
</div><br></div>
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_______________________________________________
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http://www.fot-racing.com
Archive: http://www.team.net/archive
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