trubac Posted December 21, 2012 Share Posted December 21, 2012 Me again ... :)Was playing with the Minty web site and was wondering how it works : the "y" measures the thickness of the needle -----> the higher the graph the richer the needle, right ?As my car got a tubular manifold and will get soon a sportish exhaust and rampipe thing a richer needle would be great, no ?Anyone has tried different needles on the HS2?CheersG Quote Link to comment Share on other sites More sharing options...
James Posted December 21, 2012 Share Posted December 21, 2012 The thicker the needle the leaner it is at that point.The needle acts as a restriction to the flow of fuel.(So yes, you are right — that's also a reason I inverted the Y axis) Quote Link to comment Share on other sites More sharing options...
trubac Posted December 21, 2012 Author Share Posted December 21, 2012 Hi James, congrat for such a helpfull site you've made ! (clap)(clap)(clap)(clap)(clap) Quote Link to comment Share on other sites More sharing options...
trubac Posted December 21, 2012 Author Share Posted December 21, 2012 But you've ommit the 1300 FWDs :'( :'( Quote Link to comment Share on other sites More sharing options...
James Posted December 21, 2012 Share Posted December 21, 2012 Omitted from what? :) Quote Link to comment Share on other sites More sharing options...
trubac Posted December 21, 2012 Author Share Posted December 21, 2012 omitted from your "Triumph Car Comparer " and the "Speed & RPM Calculator" http://www.mintylamb.co.uk/?page=triumphcompare.php Quote Link to comment Share on other sites More sharing options...
James Posted December 21, 2012 Share Posted December 21, 2012 Give me the details and I'll add them :) Quote Link to comment Share on other sites More sharing options...
trubac Posted February 12, 2013 Author Share Posted February 12, 2013 Anyone has tried different needles on the HS2?With my ram pipes and tubular exhaust manifold, I do get a loose of power at half throttle ... the take off is perfect.So i imagine that a richer needle in the 4-5-6 area would be better, but don't know how to choose them : does 0.01 mm makes a lot of difference ?ThanksG Quote Link to comment Share on other sites More sharing options...
That Man Posted February 12, 2013 Share Posted February 12, 2013 I would first check that everything else is as it should be, is there any wear in the original needles? are you using different air filters? i believe if you use K&N's for example you need to change the dashpot springs from red to yellow IIRC.Is your tubular manifold the original triumph one? as that shouldn't make a difference, but using ram pipes may require different needles I don't have any real experience of changing needles on SU's as i never ran them when i tuned my car, but it might be worth sending a PM to CHRIS211083 as he spent a lot of time fiddling with needles on his spitfireBut it will only be trial and error unless you have something to measure your air/fuel ratio Quote Link to comment Share on other sites More sharing options...
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