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Message: [QUOTE="Hotrodtractor, post: 37528, member: 25"] That sounds high - but is actually lower than what I expected. I know my DD tune on my Dmax runs about 1.5psi of backpressure to boost at cruise empty - it is just a bit less at WOT and its about 1:1 with a loaded trailer on the back at cruise - but I have the benefit of modifying my vane tables on the VGT to control it a bit. I would like to get the backpressure down a bit for sure during empty cruising conditions - but it runs so nice as it sits and is super responsive. Either way that is one of my goals for this summer is to put in some development time making a better vane table. [/QUOTE]

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