iggy Posted December 2, 2017 Share Posted December 2, 2017 Hi all i have a pair of su hs6 carbs fitted to my mk2 2500 and been asked the question what size is the venturi of these carbs i presume its 1 3/4" or 45mm am i correct? thanks Quote Link to comment Share on other sites More sharing options...
iggy Posted December 2, 2017 Author Share Posted December 2, 2017 ok thanks Ian any idea where the serial no is stamped on the su carbs Quote Link to comment Share on other sites More sharing options...
Clive Posted December 2, 2017 Share Posted December 2, 2017 Another method is the number of attachment bolts/studs to the manifold.4 is HS62 on a diagonal is HS42 vertical HS2There are obviosly other carbs, 1 1/8, 2" and so on, but he above covers the vast majority Quote Link to comment Share on other sites More sharing options...
Nick Jones Posted December 2, 2017 Share Posted December 2, 2017 HS6 is 1 3/4" by definition.Nick Quote Link to comment Share on other sites More sharing options...
piman Posted December 3, 2017 Share Posted December 3, 2017 Hello Iggy, the reference number is or should be on a stamped metal tag attached to the float chamber. Alec Quote Link to comment Share on other sites More sharing options...
iggy Posted December 3, 2017 Author Share Posted December 3, 2017 thanks for the replies guys, the small tag is not there on my carbs, but i now no what the ventri size is, il email Allens performance and let them no, Quote Link to comment Share on other sites More sharing options...
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