What is peak boost stock? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 08-13-2003, 12:08 AM   #1
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Default What is peak boost stock?

What is peak boost level for a stock Series II L67?
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Old 08-13-2003, 04:26 PM   #2
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GM states it as 6psi sometimes, and 7psi other times, they don't even know, but it should be right around 6.5-7psi. With a 3.4 pulley it is ~12 on an otherwise completely stock car, with mods, it should go down. For instance peak boost on our 2000 SSEi is 11.2, because it has high ratio rocker arms. With headers, it would probably drop to about 9-9.5psi.
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