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Message: [QUOTE="Hotrodtractor, post: 148272, member: 25"] I run a modified VGT turbo and a hybrid GT42 on my Dmax. Its a nice little set of towing compounds - but truth be told if you mess around with it enough you find that the GT42 is holding the setup back for the same reasons that Charles upgraded from the GT47 to the GT55 - the turbine wheel of the 42 is the restriction in the system. Going to a more efficient turbine wheel will improve spool up and top end capabilities. I've been on the verge of installing tachs on both turbos just to see where they fall in the maps at all times - I keep hesitating because I fear I know the answer already based on experience of myself and others - just because it can "work" doesn't mean it works ideally. doing it over again - I would probably have a GT55 for an atmosphere and I would just keep on towing my 36' gooseneck trailer down the road with low EGTs and no spool up troubles, but then what the hell do I know - I've only been rocking compounds on a trailer towing Dmax for 80Kish miles. [/QUOTE]

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