 Rev limiting rotors |
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| Sea Dragon 914 |
 Sep 10 2017, 12:13 PM
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#1
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Member  Group: Members Posts: 114 Joined: 26-February 03 Member No.: 358 Region Association: Northern California  |
I'm looking for a Bosche rev limiting rotor for my 914 2.0. I recall there was one that was either 6300 or 6500 rpm. Does anyone know where to find them and what the part number is?
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| Mark Henry |
Sep 10 2017, 12:25 PM
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#2
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
QUOTE(Sea Dragon 914 @ Sep 10 2017, 02:13 PM)  I'm looking for a Bosche rev limiting rotor for my 914 2.0. I recall there was one that was either 6300 or 6500 rpm. Does anyone know where to find them and what the part number is? I imagine Pelicanparts have them. Even in race trim the type 4 runs out of torque at 5800rpm. 63-6500rpm will require dual springs, HD valvetrain, balanced engine, etc. Do not use these rotors as a shift indicator, loading and unloading the engine with a rev-limiter will destroy your bearings, etc in short order if you use it this way. A rev-limiter is the lesser of two evils, a last ditch protection device. |
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| mgphoto |
Sep 10 2017, 12:58 PM
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#3
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"If there is a mistake it will find me" Group: Members Posts: 1,339 Joined: 1-April 09 From: Los Angeles, CA Member No.: 10,225 Region Association: Southern California |
911 rotor cuts out at 6300, fits the shaft.
Mike |
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| 914Sixer |
Sep 10 2017, 01:08 PM
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#4
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914 Guru Group: Members Posts: 8,886 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region 
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914 rotors are set at 5800 rpm, same as the redline on the tachometer. Autohausaz.com $30.77
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| injunmort |
Sep 10 2017, 02:58 PM
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#5
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Senior Member Group: Members Posts: 1,024 Joined: 12-April 10 From: sugarloaf ny Member No.: 11,604 Region Association: North East States |
partsgeek
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| DM_2000 |
Sep 10 2017, 03:32 PM
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#6
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Member Group: Members Posts: 217 Joined: 16-August 17 From: PA Member No.: 21,351 Region Association: None |
Something to remember as it sometimes get lost. A rev limiter won't help a mechanical over rev ( 3 / 2 rather than a 3 / 4 ) or if a shift is missed completely and inertia carries the motor past the rev limiter.
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| Sea Dragon 914 |
Sep 10 2017, 05:44 PM
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#7
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Member Group: Members Posts: 114 Joined: 26-February 03 Member No.: 358 Region Association: Northern California |
Thanks. I thought the old 911 rotors worked but I wasn't sure. I have an engine that is balanced with mild cam and heavy springs. Just need it as as safety measure.
My throttle cable stuck and the RPMs shot to 7k. I replaced the cable and everything seems ok. I don't think there is any damage as it feels like I still have 4 cylinders firimg. |
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