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Message: [QUOTE="superpsd, post: 1337147, member: 15821"] It all comes down to the turbocharger specs. CFM for CFM smaller twin turbos versus a larger single will spool quicker and have more street manners. The single will be laggy but pull harder up top due to less exhaust restriction. Turbine housing sizes play a huge part of the balance. Smaller housing as in the smaller ratio bottleneck will create faster response with reduced higher rpm power due to higher backpressure. A larger housing will be laggy at lower flow and great at full tilt as the exhaust restriction has been reduced. I have simply taken the turbine housings on a few of my builds and ported the housings to increase high rpm power at the expense of a little low end response. There are other things that can improve response however. Ball bearing turbos, spool valves, nitrous, ceramic coatings to keep the exhaust temps contained in the hotside (hotter exhaust gases move at higher velocity) and more. [/QUOTE]

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