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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Here’s one for the technoctats:-<o:p></o:p></p><p class=MsoNormal>You may have noticed my posts about swapping from two-shouldered to single-shouldered dashpots. I did it because having two of one and one of the other was irritating, not because I thought there’d be any changes.<o:p></o:p></p><p class=MsoNormal>So, I swapped the offending two and that gave me three HD6s, all with one shoulder.<o:p></o:p></p><p class=MsoNormal>Car started on the choke, same as normal. Seemingly!<o:p></o:p></p><p class=MsoNormal>However, doing the garden hose in one ear trick revealed that the rear carb, always single shouldered, was making less intake hiss than the other recently added pair. Easily rectified.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I took the car out this afternoon. Started fine and ran well. But, if I eased off, the revs dropped and the engine cut out. Also, there was quite a lot of popping and f**ting on the overrun.<o:p></o:p></p><p class=MsoNormal>So, on my return, I gave the front two carbs about half a turn up on the slow idle screws. This, quite small adjustment really, seemed to cure it and even to raise the idle rather higher than I like. <o:p></o:p></p><p class=MsoNormal>Adjusted down quarter of a turn and all seems well.<o:p></o:p></p><p class=MsoNormal>Questions:- beyond the obvious – ie that changing dashpots does make a difference after all – what is going on? Why was there a change?<o:p></o:p></p><p class=MsoNormal>(Plainly, I swapped needles and springs when I swapped dashpots so I’ve got all the same in the carbs….the ones that I had all along).<o:p></o:p></p><p class=MsoNormal>Any ideas?<o:p></o:p></p><p class=MsoNormal>Simon<o:p></o:p></p></div></body></html>