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2011 challenger 392 6.4 with a Maggie 2300 . I am only making 552 whp . With a 2.8 upper , 18% overdrive crank pulley, kooks long tube headers, KB boost a pump, CAI, all forged internals, FIC 1000cc injectors, 2 stage colder plugs , a stage 2 snow meth kit, making 13 lbs of boost. I was making 515whp before i forged it and upped the boost .Then* It made 600 whp before it ran out of injectors . So I had FIC 1000cc injectors installed and it's made 590 whp . Then I was told then it was pulling timing because of high IATs. So I added the meth kit and new 2 stage colder plugs plugs* And lost 40hp ? Now my tuner is telling me I have to have racing fuel to make 650 or more whp**
My spark is 12.5 with 3 degrees of knock
 

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