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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 11-23-2002, 10:52 PM   #1
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Default turbos and gas

I've always wondered this. Do turbos increase or decrease fuel milage?
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Old 11-24-2002, 06:21 AM   #2
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As with all forced induction applications, it is going to decrease gas mileage. But depending on how much boost your run also affect gas mileage. But for example roots always has boost even at idle. Depending on how you tune a turbo and size it, also Centrifgal, you can get better gas mileage around town if its not in boost basically. Since you set it up so the turbo spools at around 3000 rpm, so around town as long as you are under 3k rpm, you are basically driving around N/A car. Similar w/ CSC except because its affected more by engine rpm not too much better. Hope that helps.

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