black_widow87 Posted March 3, 2011 Share Posted March 3, 2011 Hi guys, im hoping to upgrade my turbo in the next month or so to a t61 with 4" inlet. My current turo has a 3" inlet with a large 9" Green Cotton air filter wth 3" neck diameter. Will this be too restrictve on the t61 with 4" inlet? Cheers Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted March 3, 2011 Share Posted March 3, 2011 Who knows??? If you want the truth put a nipple on the 3 inch pipe and make a simple manometer and measure the pressure drop, or compare to a bigger set up if you have both. Quote Link to comment Share on other sites More sharing options...
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