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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 03-30-2011, 09:26 AM   #1
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Default Horse Power

I am doing some equations from class on my car
Brake Specific Air/Fuel Consumption
Thermal Efficiency
100% Volumetric efficiency and all that kind of stuff.
What horse power and Volumetric efficiency is my Series 2 running at cruise control 55mph?

Thank you
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Old 03-30-2011, 09:29 AM   #2
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That'* a good question. Had my aeroforce set to HP and I seem to remember it saying less then 50hp when cruising on the highway. Not perfect by any means, but a good general number.
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Old 03-30-2011, 09:32 AM   #3
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Ok, any idea how far the throttle is set so i can guess a VE number?
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Old 03-30-2011, 09:37 AM   #4
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I just looked at one of my older scans, and cruising at 55 shows 7% on TPS
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Old 03-30-2011, 09:59 AM   #5
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I'll go ahead and say thats around 20% VE seeing as we learned the scale for newer cars to be 15-20 at idle and 115 at wot. so our engines need about 8.154grams of fuel per minute per cylinder. Do you know how to find how many pulses per minute the injectors need to do for that?
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Old 03-30-2011, 10:29 AM   #6
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If I'm looking at the right thing, it says 3.3 Msec
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Old 03-30-2011, 10:34 AM   #7
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I cannot remember how to find it though.
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Old 03-30-2011, 10:44 AM   #8
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Tell me if this sounds right.

I'm running at ~1600rpm @ 55mph
1600/60 seconds=26.67rps
26.67/6 cyl=4.457rps/cyl
So the 4.457 should equal my pulses per second?
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Old 03-30-2011, 10:53 AM   #9
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I don't think that'* right. Should be.

1600/60=26.67/4=6.67/6=1.11

It'* the number of strokes. Each cylinder fires once per 4 strokes. I think this is right.
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Old 03-30-2011, 10:57 AM   #10
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Ok I couldnt remember if stroke was involved, I'll double check with my professor later. thanks
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