Rev Limiter (123 Ignition) |
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Rev Limiter (123 Ignition) |
Not_A_Six |
Dec 3 2019, 06:12 PM
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#1
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Member Group: Members Posts: 110 Joined: 28-November 18 From: North Idaho Member No.: 22,682 Region Association: Pacific Northwest |
The positive reviews here have me looking hard at a 123Ignition dizzy replacement on my '73 2.0 w/ stock D-Jet.
But, the version they offer for the 914 that's compatible w/ D-Jet (123\PORSCHE-4-R-V-IE) has a fixed 8000 rpm rev limiter. The thought of my motor turning to shrapnel at 8000 rpm is a just tad bit worrisome. (IMG:style_emoticons/default/icon8.gif) Ed at 123 Ignition said that the OEM rev-limiting rotor won't work in their dizzy, and suggested an aftermarket stand-alone rev limiter. But, I'm not too enthusiastic about adding an extra box at additional expense, just to limit revs. Has anyone here used the 123Iginition w/ D-Jet? What did you do to limit rpm? Anyone just run without a rev limiter? Thanks. |
Mark Henry |
Dec 4 2019, 09:36 AM
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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 |
You want no more than a 6K redline and never use a limiter as a shift indicator.
Depends on the cam but torque drops of at 5400 rpm with most cams, some hotter street cams it's about 5600. |
Not_A_Six |
Dec 4 2019, 09:52 AM
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#3
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Member Group: Members Posts: 110 Joined: 28-November 18 From: North Idaho Member No.: 22,682 Region Association: Pacific Northwest |
You want no more than a 6K redline and never use a limiter as a shift indicator. Depends on the cam but torque drops of at 5400 rpm with most cams, some hotter street cams it's about 5600. Thanks. I was more concerned with somebody over-revving the engine accidentally and thought the rev limiter would be a valuable (essential?) safety valve. I do know how to drive, after all. (IMG:style_emoticons/default/wink.gif) |
VaccaRabite |
Dec 5 2019, 08:16 AM
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#4
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En Garde! Group: Admin Posts: 13,446 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
Thanks. I was more concerned with somebody over-revving the engine accidentally and thought the rev limiter would be a valuable (essential?) safety valve. I do know how to drive, after all. (IMG:style_emoticons/default/wink.gif) How would you accidentally rev past 6K? A rev limiter won't save the engine from a money shift (typically 5th to 2nd) since that is a mechanical over-rev and not caused by the gas pedal. Only way I see this as possible is racing the car (AX or track) and not paying attention to the sounds your car is making. Zach |
Not_A_Six |
Dec 5 2019, 05:30 PM
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#5
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Member Group: Members Posts: 110 Joined: 28-November 18 From: North Idaho Member No.: 22,682 Region Association: Pacific Northwest |
How would you accidentally rev past 6K? A rev limiter won't save the engine from a money shift (typically 5th to 2nd) since that is a mechanical over-rev and not caused by the gas pedal. Only way I see this as possible is racing the car (AX or track) and not paying attention to the sounds your car is making. Zach I'm guessing that you don't have kids. (IMG:style_emoticons/default/biggrin.gif) |
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