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Good morning. I have a 2012 2500. EFI live,464 turbo.airdog 150, GDP 150 injectors, ATS twin fueler... I have searched and can't find an answer. Dynoed the truck for tuning and it is dumping the fuel at 2600 to 2900 rpm. I have tried shimming the factory rail plug and have tried the race plug...

Just kidding but i do have a question about valve springs i am fixing to install arp 2000s and 90hp nozzles i am wanting stock 475 compounds but will be awhile when do you need heavy springs

Just wanted to say hello I am new to diesels and I am looking to end up with around 600hp-1200flbs if any one has suggestions i am open truck is mostly stock right now 06 4x4 qcdrw s&b cold air intake, 5" turbo back w/ flow through muffler, isspro gauges all that is on the truck. On the shelf...