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Registered
Join Date: Nov 2004
Location: Reno, NV
Posts: 763
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Power increase with cat bypass?
I have a stock 3.2, except for a K&N cone filter and an Autothority chip. What power increase, if any, would I achieve by installing a cat bypass? What other advantages and disadvantages (ignoring smog testing, which is not relevant at the moment) would I see?
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1964 356 C 1970 911T 1974 914 2.0 1986 Carrera Spec911 race car #76 1990 Carrera 2 |
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08-21-2008, 03:30 PM
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SCWDP- Shock and Awe Dept
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It depends on the condition of your CAT. Replacing a clogged CAT w/ anything should yield a power increase, if it's original even a new CAT won't hurt. Other than that it might sound better which will make it feel more powerful.
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Ryan Williams, SCWDP '81 911SC Targa 3.6 '81 911SC Coupe 3.2 #811 '64 VW Camper Bus, lil' Blue |
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08-21-2008, 05:39 PM
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Registered
Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
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+/- 7hp
bypass w SW chip 20HP + |
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08-21-2008, 08:28 PM
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THE IRONMAN
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Is your Autothority chip burned to work with a catbypass...?
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1984 911 CARRERA RUBY RED TARGA SW CHIPPED-BURSCH CATBYPASS MONTY FREE FLOW EXHAUST <IN GAS WE TRUST> |
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08-22-2008, 03:31 AM
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Registered
Join Date: Mar 2007
Location: Upland
Posts: 62
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I wouldn't be able to state any info on a HP increase but I noticed that the power band changed when the Cat was replaced with a bypass on my 80 SC. It seemed that the low end response had improved.
Hope that helps. |
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08-22-2008, 07:46 AM
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1981 Porsche 911SC Targa 3.6
Porsche 914
Porsche 911 Carrera
THE ROADSTER
