How Much Boost Is Bad?
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Senior Member
Joined: Jan 2003
Posts: 283
From: Oxnard, CA.
OR....I could be talking out of my ***(wouldn't be the first time and won't be the last). I don't know if I used all the correct terms or if I'm even close to right. 
I'ts just my theory. Please correct me if I'm off.
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Joined: Feb 2002
Posts: 6,331
From: Frederick MD
Originally Posted by RX73rdgen' date='May 4 2003, 07:37 PM
My understanding is that that over 4000 rpms or so if the smaller turbo is making at least 7psi of boost or so an actuator switches over to the larger turbo.
Someone correct me if I'm totally wrong.
Someone correct me if I'm totally wrong.
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Joined: Jan 2003
Posts: 8,079
From: union, new jersey
well, from what i know, the primary turbo boosts up to 10psi then it switches over to the 2nd turbo, thats why there's a 10-8-10 pattern...... 8lbs is the switch over..... then the second turbo takes it the rest of the way
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Joined: Feb 2002
Posts: 6,331
From: Frederick MD
Originally Posted by cmartinp28' date='May 4 2003, 08:09 PM
well, from what i know, the primary turbo boosts up to 10psi then it switches over to the 2nd turbo, thats why there's a 10-8-10 pattern...... 8lbs is the switch over..... then the second turbo takes it the rest of the way
The primary turbo boosts 10psi to 4500... then the transition to NON-SEQ occurs where both turbos COMBINED make the 10psi of boost.
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