Quote:
Originally Posted by DrBacon
That's effectively what the Rotrex kit does, just spins the blower at full potential using a wastegate to limit the additional boost resulting in moving the entire boost curve left. The exact same thing can obviously be accomplished with a vortech kit as well. The SI would get you part of the way there but a TI trim blower would be more comparable to the Rotrex in terms of CFM.
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I don't know how well the Ti trim works on an hr but it didn't work worth a sh!t on my vhr. It gained a ton of boost but lost power and torque. Had to go back to the Si volute and impeller to get the power back