11-04-2014, 09:37 AM
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#11 (permalink)
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A True Z Fanatic
Join Date: Dec 2010
Location: Houston
Posts: 14,532
Drives: '10 G37 6MT
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Quote:
Originally Posted by TopgunZ
Sorry just re-chiming in here. I have never tuned off pump. Always E.
That max psi is situational. The #'s may be off. That's why when I stated "I may be off here but I cant see this turbo hitting more than 21", was due to the condition of my readings.
Basically, I only had that turbo spooled up like that for a short amount of time. I never even hit 5250 to cross the two line curves. As you can see though, the torque does flatten out and the boost wasn't appearing to climb much at that point.
This reading happened because I was told incorrectly by everyone and their dog how to hook up my dual wastegates to a MBC. Everyone was wrong so my turbo basically was unrestricted and spooled as much as possible. I of course figured out how to hook it up correctly and then made 533whp 480tq on 10psi (converted to DJ).
Converting the 570 to DJ would be more like 655tq. No idea what my HP would have been but it would be over 700 for sure.
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Back up the truck! I clearly remember having a Sunday morning conversation with you about this issue and how you should have plumbed the WGs. It was post-tune so maybe your comment is prior to tuning and then maybe you did get some bad advice.
You told me that your MBC failed and you just removed it and plumbed the two lines together. That action basically welded your WGs shut because you were adding equal pressure holding them closed as you were adding to open them.
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