Compression Ignition Addict
Join Date: Feb 2011
Location: upstate ny
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A gasoline has a throttle valve in the intake-it is more critical to get air, and have an ideal air/fuel mixture. Air is important to a diesel as well, but as the intake is free flowing, without restriction, It no longer becomes the limiting factor. It is able to get as much air as it needs for the stock fuel. Increasing the pressure isn't necessarily a good thing if the engine is already burning the fuel completely. The reason you don't make more boost? You don't need it. The only point in adding more boost is to allow for you to burn more fuel, which at stock power levels you don't have. Compressing air via a turbocharger makes it hotter than the ambient air. The more you compress it, the hotter it gets. There is an optimum fuel/air ratio. The only time adding more air is a good thing is if your engine requires it-as in belching black smoke because at that point the amount of fuel injected exceeds the amount of air supplied/required to burn it.
I guess if you want to feel cool because your gauge reads higher than stock, go for it. Or hang out with the honda civic crowd. They think 25 psi of boost is "Da bomb yo". Boost is a measure of restriction in the intake. Ad all the hot air you can, push your turbo outside of its efficiency range, and increase your drive pressure. By all means. You can let all the air out of your tires and drive around too-does that mean you should?
(this is not a personal attack on anyone in particular. Unhook the wastegate if you like, I'm just pointing out it is not beneficial, and can actually be detrimental)
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2005 Lariat CCSB F-350 SRW
300,000 miles and going strong
12" fabtech lift with 40" Xterrain's on M/T classic locks, Adjustable track bar, Bilstein 7100 reservoir shocks
Edge juice/attitude CTS, SCT with ID tunes, Snow meth. injection, Diamond eye 4" exhaust, 03 turbo, ARP studs, Sinister coolant filter
2010 stone seats/console, pioneer avic d3 with backup camera/bluetooth
Viair 450c compressor, dual 2.5 gallon tanks, air horns rated @115db
Last edited by dazdillenger; 06-27-2011 at 10:43 AM.