iceman864 Posted June 27, 2013 Report Share Posted June 27, 2013 I m not new to the forum but this is my 1st post, so let me start by saying thank u for alot of great information ,u shelby guys really look out for each other ,hope to get sum input on my issue . I just installed the 2.9 with 3.25 pulley on a 2011 , did not change throttle body or mass air ,and the car has a jlt intake pipe and k&n filter. When u are under slight acceleration its like the car is almost pulsating , could this be a vacum leak or am i choking it with the stock throttle body and MAM. Also looks like the bypass is working or i can see it open when u start the car . Link to comment Share on other sites More sharing options...
rsfdiver Posted June 26, 2014 Report Share Posted June 26, 2014 Take it and have it dyno tuned. Link to comment Share on other sites More sharing options...
Larry T Posted June 26, 2014 Report Share Posted June 26, 2014 Take it and have it dyno tuned. +1 ... or you can call Ford Racing Tech Line or Whipple http://www.fordracingparts.com/Contacts/ContactFrpp.asp http://www.whipplesuperchargers.com/content.asp?PageID=57 Link to comment Share on other sites More sharing options...
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