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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Yes, tightening down the throttle linkage is a very delicate operation as in most times if you don’t hold down both throttles the mere tightening of the clamps increases the rpm. Learned that one the hard way even though it says it in the service manual. I also agree on the syncrometer. This is a good meter from Goodparts and measures the same suction with device on each carb. I routinely tweak the throttle a little bit to get each carb set in between tests.<o:p></o:p></p><p class=MsoNormal>Jim<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><b>From:</b> DAVID MASSEY <dave1massey@cs.com> <br><b>Sent:</b> Tuesday, October 16, 2018 7:35 AM<br><b>To:</b> ptegler@verizon.net; trguy75@gmail.com; triumphs@autox.team.net<br><b>Subject:</b> Re: [TR] 61 TR3A SU H6 Carb Issues<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div><div><blockquote style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 2.0pt;margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>Seriously though.... what method didyou use to balance the air flow at idle? One of those little flow meters?<br>NOPE NADA STOP right there. Think about it...you're sealing off the air to get the bubble to rise so of course the idle changes....so the balance tube in the manifold sucks from the other carb, bypassing the fuel pull.<o:p></o:p></span></p></div></blockquote></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'>What are you talking about? Sure you affect airflow with the airflow meter but you are affecting both carbs equally when you switch from carb to carb. If you get the same reading from both they are being effected the same and have the same starting point. The concept that the human ear is better than an instrument specifically designed to measure airflow is pure hubris.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'>One thing to watch out for is assuming that since the carbs are balanced at idle they are balanced under throttle. Be very careful when tightening down the linkage to ensure that both carbs open simultaneously. This is particularly important on the TR6-style linkage that has built-in disengagement zones.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:13.5pt;font-family:"Arial",sans-serif;color:black'>Dave Massey</span><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>-----Original Message-----<br>From: Paul Tegler <<a href="mailto:ptegler@verizon.net">ptegler@verizon.net</a>><br>To: Jim Henningsen <<a href="mailto:trguy75@gmail.com">trguy75@gmail.com</a>>; triumphs <<a href="mailto:triumphs@autox.team.net">triumphs@autox.team.net</a>><br>Sent: Tue, Oct 16, 2018 3:16 am<br>Subject: Re: [TR] 61 TR3A SU H6 Carb Issues<o:p></o:p></span></p><div id="AOLMsgPart_1.2_b3d72249-8701-4264-8a12-6cac1217176c"><div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>ok....what do you mean by 'carbs aren't running smoothly' ?<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>Engine is not smooth?.. sputtering? not running smooth while cruising?<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>An old adage.... (well two actually)<br>"..most carb problems are electrical..." and "..most ignition problems are the carbs"<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>Seriously though.... what method didyou use to balance the air flow at idle? One of those little flow meters?<br>NOPE NADA STOP right there. Think about it...you're sealing off the air to get the bubble to rise so of course the idle changes....so the balance tube in the manifold sucks from the other carb, bypassing the fuel pull.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>I was finally convinced by an old mechanic and have learned from tuning more SU and ZS carbs than I care to mention.... use a 1/4" fuel line as a stethoscope ...one end in your ear..the other just up against the edge (not in) the carb throat. blocks minimal air... and believe me you can hear as little 1-2 cfm readily, but you can also hear the gurgle of the fuel flow! Years ago I actually gave away my flow gauges.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>Eons ago..I got so fed up once I bought brand new NOS SU carbs to replace mine after three rebuilds of the orig units. BUT...STILL had the same issue...smooth speed cruising and it ran like crap. Pull the choke out and it ran fine, but had to push it in at closed or low speed throttle. Spent a year+ and hundreds of messages on various LBC lists....still to no avail. Than one day at a car show.... I saw a guy with an identical setup.... open big round K&Ns and a end plate but had his air filters nearly 3/4 closed off with duct tape. In the end, the problem was incorrect vacuum effects ...not enough air velocity when the piston was mid/down as there was no restriction from the air filters.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>hhmmm.... ok...<br><a href="http://www.teglerizer.com/mgstuff/a_stumble_at_cruise.htm">http://www.teglerizer.com/mgstuff/a_stumble_at_cruise.htm</a><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>ptegler<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>On 10/15/2018 7:40 PM, Jim Henningsen wrote:<o:p></o:p></span></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><pre><span style='color:black'>Ok, I thought I had this rebuild all nailed down. Finally got around to<o:p></o:p></span></pre><pre><span style='color:black'>getting carbs balanced and set for correct mixture. After new kits, testing<o:p></o:p></span></pre><pre><span style='color:black'>piston drop timing per John Twist you tube clip (great clip), and spending<o:p></o:p></span></pre><pre><span style='color:black'>two hours fine tuning air flow and mixture. The carbs aren't running<o:p></o:p></span></pre><pre><span style='color:black'>smoothly. There is something not right and I am throwing in the towel.<o:p></o:p></span></pre><pre><span style='color:black'>Don't have a reliable mechanic that I trust for this in Ocala. Any<o:p></o:p></span></pre><pre><span style='color:black'>recommendations on a rebuilder to send these two to have them checked<o:p></o:p></span></pre><pre><span style='color:black'>professionally. <o:p></o:p></span></pre><pre><span style='color:black'><o:p> </o:p></span></pre><pre><span style='color:black'>Joe Curto?<o:p></o:p></span></pre><pre><span style='color:black'>Jeff Payla at Paltech - cant seem to get a response from him.<o:p></o:p></span></pre><pre><span style='color:black'>Buy new (ouch)<o:p></o:p></span></pre><pre><span style='color:black'>Others? <o:p></o:p></span></pre><pre><span style='color:black'><o:p> </o:p></span></pre><pre><span style='color:black'>Thanks in advance<o:p></o:p></span></pre><pre><span style='color:black'>Jim Henningsen<o:p></o:p></span></pre><pre><span style='color:black'>Ocala FL<o:p></o:p></span></pre><pre><span style='color:black'>61 TR3A eager to enjoy driving it in fall in Florida<o:p></o:p></span></pre><pre><span style='color:black'>62 TR4 eager to have restoration finished<o:p></o:p></span></pre><pre><span style='color:black'>75 TR6 eager to have new race motor put in<o:p></o:p></span></pre><pre><span style='color:black'>82 Jeep ld reliable - get in and go<o:p></o:p></span></pre><pre><span style='color:black'>2002 Triumph Trophy 1200 eager to just get out and be used.<o:p></o:p></span></pre><pre><span style='color:black'> <o:p></o:p></span></pre><pre><span style='color:black'><o:p> </o:p></span></pre><pre><span style='color:black'>** <a href="mailto:triumphs@autox.team.net">triumphs@autox.team.net</a> **<o:p></o:p></span></pre><pre><span style='color:black'><o:p> </o:p></span></pre><pre><span style='color:black'>Donate: <a href="http://www.team.net/donate.html">http://www.team.net/donate.html</a><o:p></o:p></span></pre><pre><span style='color:black'>Archive: <a href="http://www.team.net/pipermail/triumphs">http://www.team.net/pipermail/triumphs</a> <a href="http://www.team.net/archive">http://www.team.net/archive</a><o:p></o:p></span></pre><pre><span style='color:black'><o:p> </o:p></span></pre><pre><span style='color:black'>Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/triumphs/ptegler@verizon.net">http://autox.team.net/mailman/options/triumphs/ptegler@verizon.net</a><o:p></o:p></span></pre><pre><span style='color:black'><o:p> </o:p></span></pre></blockquote><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p><pre><span style='color:black'>-- <o:p></o:p></span></pre><pre><span style='color:black'>Paul Tegler<o:p></o:p></span></pre><pre><span style='color:black'><a href="mailto:ptegler@verizon.net">ptegler@verizon.net</a> <a href="http://www.teglerizer.com">www.teglerizer.com</a><o:p></o:p></span></pre></div></div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p></span></p></div></div></body></html>