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Message: [QUOTE="KCTurbos, post: 892173, member: 13852"] If you start plotting a couple of compressor maps you will see that you are way off the map and surging like crazy with that big of a turbo. That setup assuming a 3.0 liter motor and a volumetric efficiency of 70% and a very conservative goal of only 300hp per bank (600hp total) These are what you maps would look like. You can see with the s362 you are WAY to the left of the surge line. That essentially means that you are building too much pressure and not enough flow. The turbo is way too big for the motor. [IMG]http://i280.photobucket.com/albums/kk170/chstfish/s362twin_zps5d525cc4.png[/IMG] If you drop down to an s256 then it gets you much closer. You can see that you are starting to ride the surge line and just barely get inside the compressor map. If you were to increase your volumetric efficiency as you plan with better head flow design then you would be just barely inside the compressor map. [IMG]http://i280.photobucket.com/albums/kk170/chstfish/s256_zps2e6a9155.png[/IMG] I played around a little and found a map that looks pretty good. The gt3571. You would fall right inside the compressor map. [IMG]http://i280.photobucket.com/albums/kk170/chstfish/gt3571_zps96aa3b94.png[/IMG] I did not post any of this to swing you towards a turbo. I am also sure that you are looking for a lot more than the hp goals that I used for my reference. I was just simply trying to answer your questions as to why the s362 would not work. Let me know if you have any other questions or if none of this even make sense [/QUOTE]

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