Serving Our Country!
Join Date: Nov 2007
Location: Austin, TX
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There is no truth to the myth of an engine needing some amount of backpressure to produce good torque. It is from the hot rod days when carbuerated motors would lean out (ie not provide enough fuel) when less restrictive exhausts allowed more air into the engine ... and would end up burning hot and burning exhaust valves.
The least restrictive exhaust, the better. You have a turbo in the exhaust path anyways ... so its not like you can eliminate exhaust backpressure entirely.
2002 F-250 Lariat Extended Cab Long Bed, 7.3L, Auto, 4x4
- 6" BDS Suspension lift (All spring)
- Driveshaft Specialist 1 piece conversion
- 315/75R16 BFG A/Ts
- DP-Tuner F6
- DIESELSITE CPR Fuel System
- Turbo-Master Wastegate Controller
- Donaldson AIS Intake w/ "Zoodad" and AIH Delete
- MBRP 4" T304 Exhaust
- Coolant filter, Evans NPG+ Coolant, 203* Thermostat and Billet Housing
- Factory Tech Valve Body
- ISSPRO Gauges (Boost, Pyro, Trans)