4.6L (1996-2004 Modular) MustangTechnical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within. Sponsored by Cruizin Concepts
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hey guys im still new at this forum thing so maybe someone can direct me. I have a vortech v1 in my 2003 gt, theres a code on for the fuel rail pressure sensor but my fuel pressure is fine(have an external gauge. my vortech also isn't making full boost which is 8-10 lbs before and now barely goes over 5, cant find any vacuum leaks either. if im not posting in the right place just let me know. thanks
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I have a low mile 03 cobra shortblock, stock gt heads n cams, hps lower intake, accufab upper plenum and 75mm tb, vortech v1 with 3.6 in pulley, 42lb injectors, svt fuel pump with KB BAP, full exhaust, drag springs, Lakewood shocks n struts, subframe connectors, driveshaft loop...I think that's it...it's for sale once I get everything back to normal. Got it all done last year an I was runnin 8lbs, changed the gauge n ran the same. Now boost barely gets to 5lbs. I kno I Gtta replace my fuel rail pressure sensor today but I don't think that's my issue as fat as boost goes. Belt slip sounds very likely, I replaced the belt and tensioner last year but I put 20k miles on it since then.
Learn something new everyday. How does LT's affect boost output?
In the power levels of roughly 499rwhp and lower, long tubes have TOO much flow so our engines can't create hardly any back pressure which our engines need up until we rev higher which therefore causes us to loose boost. Around 500-800rwhp (maybe more) the exhaust that is coming out is much more plentiful to the point where it creates back pressure and the LT's are just asking for more. Hopefully this answers your question.
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