Series I or Series II - 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 04-07-2004, 01:24 PM   #1
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Default Series I or Series II

I know series I engines with 170hp were made up to 1994, and 1995 began the series II engine with 200hp. The problem is that I had a GM mechanic look at my engine and he told me it was a series II. He said series one had a metal plenum and series II had the plastic plenums. I have a plasitic plenum. Also, the car has dual exhausts if that matters. I guess I would like to know if I have the 170hp engine or the 200hp engine.


Can anyone explain this to me?
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Old 04-07-2004, 02:10 PM   #2
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You have a series I, metal plenums were only used in 92 some. The plastic ones in 93-94 weren't prone to failure like this though.

Power ratings for L27
170 Horse
225 Lb/ft

L36
205 Horse
230 Lb/ft

It has more HP because the rev limiter is raised, and the torque is in higher RPMS.
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