Compression Ignition Addict
Join Date: Dec 2008
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The VGT turbo and EGR valve control back pressure on these trucks, which is why there is no wastegate from the factory. Once the EGR valve is deleted, you're only able to control back pressure with the VGT turbo. This isn't a bad thing. Most tuners have found a pretty good spot with VGT duty cycle tuning to control back pressure with the EGR valve shut off.
Most people are gating total back pressure, not in between stages. I have an Elite 71mm and stock VGT on my truck and I don't run a gate. Been running the setup since early this year. I'm still running stock fuel though, which keeps back pressure from getting out of hand.
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2012 Ford F-250 Lariat CC/SB
Mods - Spartan tuned via laptop, 4" AFE stainless exhaust system, 2.5" PMF BMC leveling spacers, 3" PMF lift blocks, Fox Racing 2.0 shocks, Recon smoked mirror & cab lights