Guest montzz1 Posted August 31, 2009 Share Posted August 31, 2009 hi all straight to the point; after fitting a larger front mount intercooler and large airfilter and done away with air box ect , i seem to lose boost when i change gear like the turbos have been "stunned" soon boosts up again and goes like hell but didnt do this before im thinking its cos i dont have a dump valve so as i put im stunning the turbos so they have to start all over again , if u get my meaning thanks in advance Quote Link to comment Share on other sites More sharing options...
dayosupra Posted August 31, 2009 Share Posted August 31, 2009 The new FMIC has a larger volume of air to fill and pass threw to deliver to the throttle. This will cause a slight bit of lag. Quote Link to comment Share on other sites More sharing options...
Homer Posted August 31, 2009 Share Posted August 31, 2009 The FMIC shouldn't make any real difference on shifts, though it will introduce a little bit of turbo lag. Most likely it has a boost leak on one of the IC joints, it's very common but can be a pita to find. Check and double check every joint. Do you have the stock recirc valve in place or nothing at all? Either way, it shouldn't make any difference whether there is one there at all. Quote Link to comment Share on other sites More sharing options...
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