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Message: [QUOTE="dseitler, post: 1121851, member: 14112"] It drives totally different than the 64.5/70. Lost the top boost numbers of 48 but still puts out 43lbs so far. I believe it will give me much more top end but the street has suffered a little running red light to red light. Still need more time to run it out. I got to say so far the 64.5/70 has the been the best street turbo I've tested. I miss the instant quick spool tire spinning street running that we do in South Florida. Not that the 67.7 won't do it but in short burst the 64.5 so far from what I see would take it. Highest back pressure at max boost has been 55.7 psi and that is lower than the 70mm. But the strange numbers I see is that at cruising speed the 70mm would be at 3.9psi @ 5lbs of boost. The 74mm is at 4.3psi @ 5lbs of boost with a bigger Turbine. Should be the opposite I would think. Where the 67.7/74 shines is the upper RPM band. From 40 MPH to 100 MPH is where this Turbo lives. Track times should tell the true story next Friday night when we go the the Florida West Coast. Should have more info ready tomorrow night to post with numbers. D Sent from my iPhone using Tapatalk [/QUOTE]

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