Compression Ignition Addict
Join Date: Jul 2010
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It's a butterfly valve directly behind the outlet of the turbo's exhaust side, built into the cast housing that bolts to the turbo, actually.
If it's cold it, it closes to "help warm the engine up"...IMHO, it just makes a boatload of noise. It is also a bit of a restriction when it's open (although, I doubt you'd ever even notice it). Unless your at the point of needing an aftermarket turbocharger, I wouldn't mess with it...
2001 F250, 7.3, Automatic, 4x4, 33's, Leveled, Cobra 29 CB Radio, Dual Firestick Whips, Pioneer Head Unit, Riffraff 6637 Intake Kit, 4" turbo-back straight pipe, Dual Alternator Upper Radiator Hose, AutoMeter Boost, Pyro, Trans Temp, Delta Toolbox, Gooseneck Hitch and a heavy right footed driver...
Wishlist: 160cc single shots, GT38r, BTS, SRP 1.1
REAL TRUCKS DON'T NEED SPARKPLUGS!!
Lord, please take care of this drivin' fool...