 Making a 914-6 Conversion your own, The Quest for Quiet |
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| Root_Werks |
 Nov 27 2024, 04:26 PM
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Village Idiot  Group: Members Posts: 8,492 Joined: 25-May 04 From: About 5NM from Canada Member No.: 2,105 Region Association: Pacific Northwest 
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The Six Conversion:
2.7 CIS with 993 cams, 46/40 valves, 911S 8.5:1 CIS Pistons with Nikasil cylinders. Guessing it produces slightly more than stock 2.7S HP and has a much lower, broader TQ curve. Current exhaust is stock 914-6 HE's and one of Ben's SS Quiet mufflers. Been very happy with the exhaust note the past few years, but always wondered if stock would be quieter. Ben's Quiet Muffler ( I did have to reclock the tip as it was more for 1974-up 911): Attached thumbnail(s) 
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| 914Toy |
Dec 1 2024, 04:23 PM
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#2
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Senior Member Group: Members Posts: 736 Joined: 12-November 17 From: Laguna beach Member No.: 21,596 Region Association: Southern California
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I use the 914-6 air cleaner.
I am investigating a modified engine fan from the later Porsche engines, that have fan blades curved in more than one direction (as per the stock fan), which I suspect is to reduce the "siren" whine at above 3000 rpm engine speeds. |
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| mepstein |
Dec 1 2024, 08:00 PM
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#3
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914-6 GT in waiting Group: Members Posts: 19,615 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region
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QUOTE(914Toy @ Dec 1 2024, 05:23 PM)  I use the 914-6 air cleaner. I am investigating a modified engine fan from the later Porsche engines, that have fan blades curved in more than one direction (as per the stock fan), which I suspect is to reduce the "siren" whine at above 3000 rpm engine speeds. Yes. The later fan is quieter. We actually went the other direction on a custom 3.8 build. The customer wanted carbs and the earlier fan to reproduce much of that Porsche raspy engine sound. |
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Posts in this topic
Root_Werks Making a 914-6 Conversion your own Nov 27 2024, 04:26 PM
Root_Werks Took the 914 out and ran some baseline numbers usi... Nov 27 2024, 04:32 PM Root_Werks Ran the same tests as close as I could, same stret... Nov 27 2024, 04:38 PM
worn When I first got the 3.2 engine in the car I decid... Nov 27 2024, 04:55 PM mb911 Man 86 dbs is pretty quiet for these cars Nov 27 2024, 04:39 PM Steve With my 3.2 most of the noise came from the fan an... Nov 27 2024, 05:03 PM mepstein
With my 3.2 most of the noise came from the fan a... Nov 27 2024, 06:54 PM Montreal914 @[url=http://www.914world.com/bbs2/index.php?showu... Nov 28 2024, 02:16 AM mb911 https://achtungkraft.com/pages/gtk-muffler-line
... Nov 28 2024, 05:00 AM Root_Werks Stock Dansk, sorry about that. Nov 28 2024, 12:27 PM mb911
Stock Dansk, sorry about that.
Nothing to be sor... Nov 28 2024, 01:39 PM mlindner I have Ben's sport muffler and headers. Great ... Nov 28 2024, 04:36 PM horizontally-opposed Very interesting thread, and agree the readings ar... Nov 29 2024, 12:04 PM Steve 914toy on the forum is also on this quest. He has... Dec 1 2024, 10:09 AM 914Toy
I use the 914-6 air cleaner.
I am investigating ... Dec 1 2024, 08:20 PM mb911 I really do miss the quiet system when the roof is... Dec 1 2024, 05:12 PM |
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