Colinablewhite Posted April 9, 2022 Report Share Posted April 9, 2022 Hi all you knowledgeable people. Hopefully a quick question. I am rebuilding a US car with twin Stromburges . I have the carbs off and servicing them. On the underside of the rear carb I have a vacuum pipe which I don’t know what it is to connect to. As per the general advice I have removed all the extra US emissions equipment. Do I just blank it off ? The vacuum advance pipe comes off the manifold. Thanks for any advice. Colin. Quote Link to post Share on other sites
DRD Posted April 12, 2022 Report Share Posted April 12, 2022 On 4/9/2022 at 12:50 PM, Colinablewhite said: Hi all you knowledgeable people. Hopefully a quick question. I am rebuilding a US car with twin Stromburges . I have the carbs off and servicing them. On the underside of the rear carb I have a vacuum pipe which I don’t know what it is to connect to. As per the general advice I have removed all the extra US emissions equipment. Do I just blank it off ? The vacuum advance pipe comes off the manifold. Thanks for any advice. Colin. I think that's the vacuum retard pipe connection to the distributor. Quote Link to post Share on other sites
poolboy Posted April 12, 2022 Report Share Posted April 12, 2022 It is..and what you have called "vacuum advance" just might be the vacuum retard.. The vacuum Retard module is on the cockpit side of the distributor...the vacuum Advance module IF you have one will be on the other side of the distributor. Quote Link to post Share on other sites
Colinablewhite Posted April 12, 2022 Author Report Share Posted April 12, 2022 Thanks Ken for your prompt reply. I will check out my pipe work to see any evidence of the advance pipe. I think it’s brilliant how we tap into a global community of like minded fellows. Quote Link to post Share on other sites
Colinablewhite Posted April 12, 2022 Author Report Share Posted April 12, 2022 I have had a closer look at the distributor and the only pipe on it comes off the cockpit side, which I am fairly sure went to the manifold. So that still leaves me with the question, where do I connect the underside carb pipe to? Quote Link to post Share on other sites
harlequin Posted April 12, 2022 Report Share Posted April 12, 2022 (edited) The distributor retard unit is connected to the underside of the rear carb. I think what you have on the manifold is the connection for the anti run on valve which is mounted under the carbon canister. George Edited April 12, 2022 by harlequin Quote Link to post Share on other sites
Colinablewhite Posted April 13, 2022 Author Report Share Posted April 13, 2022 Hi H. Thanks for your reply that really does make sense. I will connect the vacuum pipe to the underside on the carb and blank off the manifold one. I will post the results. Colin. Quote Link to post Share on other sites
harlequin Posted April 13, 2022 Report Share Posted April 13, 2022 Colin Have you blanked off the by-pass valve and temperature compensators gismo? This will make things simpler and more reliable. I have also put a cap on the external float chamber vent pipes to reduce the smell of fuel in the garage, the float chambers now only vent through the port into the air filter, to make this work the little leavers on the side of the carbs have to come off. George Quote Link to post Share on other sites
DRD Posted April 13, 2022 Report Share Posted April 13, 2022 15 hours ago, Colinablewhite said: I have had a closer look at the distributor and the only pipe on it comes off the cockpit side, which I am fairly sure went to the manifold. So that still leaves me with the question, where do I connect the underside carb pipe to? That will be the vacuum retard then. Quote Link to post Share on other sites
Kenrow Posted April 13, 2022 Report Share Posted April 13, 2022 (edited) Here is the schematics for a 73 US Carb TR 6: https://trf.zeni.net/TR6bluebook/index.php?page=53 https://trf.zeni.net/TR6bluebook/index.php?page=49 Edited April 13, 2022 by Kenrow added info Quote Link to post Share on other sites
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