So I know in the past my issues were mechanical but I have exhausted all those but to no avail. The fuel pumps actually flow a little more than I expect, the injectors are larger than they need to be (80lb/hr). so the fuel system should support at least 900hp. I removed the IMRC plates and that is where my issue starts. Up to that point I was able to run out to 6500 rpm plus now I cant get past 4500 all I changed was that. This is on the stock fuel rails but didn't have an issue till I removed the imrc. my question is how much if any air is added from removing these? or is it something in the tune?
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