<div dir="ltr"><br clear="all"><div><div class="gmail_signature"><p><strong><font color="#000099">Never be beaten by equipment.</font></strong></p></div></div>
<br><div class="gmail_quote">---------- Forwarded message ----------<br>From: <b class="gmail_sendername">Kas Kastner</b> <span dir="ltr"><<a href="mailto:kaskastner@gmail.com">kaskastner@gmail.com</a>></span><br>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="mailto:van.mulders.marcel@telenet.be">van.mulders.marcel@telenet.be</a>><br><br><br><div dir="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="gmail_extra"><br clear="all"><div><div><p><strong><font color="#000099">Never be beaten by equipment.</font></strong></p></div></div>
<br><div class="gmail_quote">On Wed, Sep 16, 2015 at 1:18 AM, Van Mulders Marcel <span dir="ltr"><<a href="mailto:van.mulders.marcel@telenet.be" target="_blank">van.mulders.marcel@telenet.be</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid"><u></u>
<div>
<div align="left" dir="ltr"><font color="#0000ff" face="Arial" size="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="#0000ff" face="Arial" size="2"><span>If necessary, he can go down to 34mm in 45
Webers.</span></font></div>
<div align="left" dir="ltr"><font color="#0000ff" face="Arial" size="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="left" dir="ltr"><font color="#0000ff" face="Arial" size="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="left" dir="ltr"><font color="#0000ff" face="Arial" size="2"><span>Do you think 25kgs seat pressure is
enough?</span></font></div>
<div align="left" dir="ltr"><font color="#0000ff" face="Arial" size="2"><span>Marcel</span></font></div>
<div align="left" dir="ltr"><font color="#0000ff" face="Arial" size="2"><span></span></font> </div><br>
<div align="left" lang="nl" dir="ltr">
<hr>
<font face="Tahoma" size="2"><b>Van:</b> Van Mulders Marcel
[mailto:<a href="mailto:van.mulders.marcel@telenet.be" target="_blank">van.mulders.marcel@telenet.be</a>] <br><b>Verzonden:</b> woensdag 9
september 2015 17:32<br><b>Aan:</b> '<a href="mailto:fot@autox.team.net" target="_blank">fot@autox.team.net</a>'<br><b>Onderwerp:</b>
TR6 Cannon Intake Manifold<br></font><br></div>
<div></div>
<div><font face="Arial" size="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="Arial" size="2"><span>Can these runners be
reamed to 45mm/34mm? If not, are there other inlet manifolds
available?</span></font></div><span><font color="#888888">
<div><font face="Arial" size="2"><span>Marcel.</span></font></div></font></span></div>
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