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Join Date: Mar 2005
Location: Marietta, GA
Posts: 30
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3.0 Performance Enhancement
Has anyone had direct experience with changing cams and exhaust on a 3.0 engine to increase horsepower? Any idea on actual results? What about power curve change? What about durability? Comments please!
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04-19-2005, 05:12 PM
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do a search using these terms
964 cams 20/21 cams ssi
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big AL '77 911 |
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04-19-2005, 07:43 PM
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hmmmm, my dad has a 78 3.0 motor in his 74. The motor has the "usual" updates/backdates" as you will. SSi heat exchangers, two in two out muffler, 20/21 cams, msd 6al box and coil, advanced timing slightly. The motor feels very good, strong all around but really comes on around 3500. Also helps to have a 74 tranny with the lower gear ratio and a 2200lb car.
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74 911s neverending story. two feet and a jetta for now. |
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04-19-2005, 08:06 PM
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Location: VA
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'06 Cayman S '16 Cayenne '08 Audi RS 4 |
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04-20-2005, 08:58 AM
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Durability with either of the aforementioned cams shouldn't be an issue Tony...
FYI you can't use a cam any more aggressive than those two on a stock 3.0L because of valve clearance issues with the pistons. Anything else requires new pistons...
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Chris ---------------------------------------------- 1996 993 RS Replica 2023 KTM 890 Adventure R 1971 Norton 750 Commando Alcon Brake Kits |
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04-20-2005, 01:44 PM
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Location: Marietta, GA
Posts: 30
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Gentlemen,
Thank you for your comments/suggestions. Tony |
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04-20-2005, 04:05 PM
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1974 Porsche 911S 1978 3.0 SC
1970 Porsche 911 S 
