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Just what it added. Thats why the 68 number was so wrong.



Oh, OK. Then it should be more like 27.7 hp gained per lb of boost in my current configuration. That makes more sense anyway.



Yup, you've got it now.

"Optimized" in my book is properly sized turbos for the intended purpose of the vehicle, well done headers with attention paid to lengths and diameters, for both primaries and secondaries, wastegate placement, downpipe and wastegate recirculation, if any, etc.

Then we move to the cold side of things... smooth radius bends, quality intercooler cores stacked for the application, be it super cold charge or minimal pressure drop as a priority.

Then comes the head, camshaft(s). It all works together.

Do you have to do it? Not at all. Some "junk" has gone REAL fast. But if you take the time, effort, and money (HA!) you can see results above and beyond the norm. If you do it well on a high flowing head combination with the right cam you're able to see 40-50 WHP gains per PSI on sub 500" engines.

I couldn't begin to imagine the gains possible on some "big" motors!

Aaron M