marki Posted August 8, 2022 Report Share Posted August 8, 2022 (edited) Hi All. I’m after a set of carbs and manifold for a friends car if anyone knows of any ? We are after SU’s cheers Mark. Edited August 8, 2022 by marki Quote Link to post Share on other sites
John Morrison Posted August 8, 2022 Report Share Posted August 8, 2022 I have a manifold John Quote Link to post Share on other sites
Peter Cobbold Posted August 8, 2022 Report Share Posted August 8, 2022 There was a change in cylinder head porting and hence two designs of manifold........... Peter Quote Link to post Share on other sites
marki Posted August 8, 2022 Author Report Share Posted August 8, 2022 Hi Peter, Dont suppose you know the head numbers ? cheers Mark Quote Link to post Share on other sites
marki Posted August 8, 2022 Author Report Share Posted August 8, 2022 Our head is a 516816 Quote Link to post Share on other sites
stuart Posted August 8, 2022 Report Share Posted August 8, 2022 3 minutes ago, marki said: Our head is a 516816 TR5 early TR6 head Stuart. Quote Link to post Share on other sites
BlueTR3A-5EKT Posted August 8, 2022 Report Share Posted August 8, 2022 (edited) 47 minutes ago, stuart said: TR5 early TR6 head Stuart. That means wide spaced inlet tracks. Manifold TKC1100 is required or equivalent from a Triumph 2500S. NOT THIS ONE 308088 See image .png Item 2 on the right not item 1 in the Moss Motors line drawing. https://mossmotors.com/triumph-tr6-250/fuel-intake-emissions/manifolds-1 Edited August 8, 2022 by BlueTR3A-5EKT Quote Link to post Share on other sites
harlequin Posted August 8, 2022 Report Share Posted August 8, 2022 (edited) Mark I have a pair of SUs on the under £250 for sale area of this forum at the moment George https://www.tr-register.co.uk/forums/index.php?/topic/80877-su-hs6-carburettors/ Edited August 8, 2022 by harlequin Quote Link to post Share on other sites
stuart Posted August 8, 2022 Report Share Posted August 8, 2022 It seems I have a manifold Stuart Quote Link to post Share on other sites
BlueTR3A-5EKT Posted August 8, 2022 Report Share Posted August 8, 2022 43 minutes ago, stuart said: It seems I have a manifold Stuart That is the late manifold that fits the PI cylinder head. Peter W PS. Pressure test the water feed before using. If leaking do not connect heater hoses to it and just block the pipe ends to stop air leaking in. Quote Link to post Share on other sites
Peter Cobbold Posted August 8, 2022 Report Share Posted August 8, 2022 Stuart thats the late PI-head-compatible manifold. Marki needs the "short runner" manifold in Pete W's photo and labelled 1 in the drawings. Peter Quote Link to post Share on other sites
Nigel Triumph Posted August 8, 2022 Report Share Posted August 8, 2022 I have a good condition manifold for twin SU HS6 from a 2500S. It's been cut and professionally TIG welded to place the carbs horizontally, not the usual 7-8 degrees downdraught. Please let me know if you're interested,,I can dig it out and post photos. Nigel Quote Link to post Share on other sites
BlueTR3A-5EKT Posted August 8, 2022 Report Share Posted August 8, 2022 4 hours ago, Peter Cobbold said: Stuart thats the late PI-head-compatible manifold. Marki needs the "short runner" manifold in Pete W's photo and labelled 1 in the drawings. Peter Marki say his head is part number 516816 which is a PI head up to early CR series and also Tri 2.5 PI. Which means wider spaced inlet ports. Manifold 1 is for TR250 with narrow spaced inlet ports. Peter W Quote Link to post Share on other sites
zelrik Posted August 9, 2022 Report Share Posted August 9, 2022 Stuart If your "6" is RHD you will have to make some minor modifications to that manifold, so the SU carbs dont foul the steering column. Swap the 8 old studs out for longer new studs and get two thick fibre spacers between the SUs and the manifold. Peter Quote Link to post Share on other sites
stuart Posted August 9, 2022 Report Share Posted August 9, 2022 52 minutes ago, zelrik said: Stuart If your "6" is RHD you will have to make some minor modifications to that manifold, so the SU carbs dont foul the steering column. Swap the 8 old studs out for longer new studs and get two thick fibre spacers between the SUs and the manifold. Peter Im not doing the conversion, just offered the manifold if its any use . Stuart. Quote Link to post Share on other sites
dingle Posted August 9, 2022 Report Share Posted August 9, 2022 Correct me if am wrong, but aren't all PI heads wide ports? Early carb (pre 1972) cars used the narrow port heads. The spacing between the intake ports (measured on the manifold gasket is .640". Later cars had wide port heads with .840" spacing. Berry Quote Link to post Share on other sites
stuart Posted August 10, 2022 Report Share Posted August 10, 2022 9 hours ago, dingle said: Correct me if am wrong, but aren't all PI heads wide ports? Early carb (pre 1972) cars used the narrow port heads. The spacing between the intake ports (measured on the manifold gasket is .640". Later cars had wide port heads with .840" spacing. Berry Correct. Stuart. Quote Link to post Share on other sites
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