Rev limiter
Thread Starter
|
Posting Guru
Joined: Feb 2002
Posts: 2,404
Likes: 3
From: Cleveland, WI USA
Rev limiter
Greetings all,
I was talking to a guy the other day about making a rev limiter for a '71 460. Something that would cut out 1 cylinder on each bank when a certain RPM was achieved.
If I'm not mistaken, grounding out a plug wire will stop it from firing. Question is, how would you ground it out only sometimes?
I thought of using a normally-open relay with a wire from the plug to one side, and the other side to ground. When the relay is closed, the plug grounds out. I don't know if that would ground out all the time though. Like if the spark would jump the gap of the open relay.
Anyone have a better idea or know if this is possible?
Thanks in advance!
Kevin K.
I was talking to a guy the other day about making a rev limiter for a '71 460. Something that would cut out 1 cylinder on each bank when a certain RPM was achieved.
If I'm not mistaken, grounding out a plug wire will stop it from firing. Question is, how would you ground it out only sometimes?
I thought of using a normally-open relay with a wire from the plug to one side, and the other side to ground. When the relay is closed, the plug grounds out. I don't know if that would ground out all the time though. Like if the spark would jump the gap of the open relay.
Anyone have a better idea or know if this is possible?
Thanks in advance!
Kevin K.
Moderator
Joined: Jan 2001
Posts: 57,014
Likes: 2,751
From: Virginia
You can't use normal low voltage wiring and relays in the high voltage circuits. It would be a piece of cake for the high voltage from the sparkplug to jump the contact gap in the low voltage relay when it was open, grounding the plug out all the time.
What kind of circuitry are you going to use to select the proper rpm?
Best to save a little money and buy one that fits on the low voltage primary side of the ignition.
What kind of circuitry are you going to use to select the proper rpm?
Best to save a little money and buy one that fits on the low voltage primary side of the ignition.
Thread Starter
|
Posting Guru
Joined: Feb 2002
Posts: 2,404
Likes: 3
From: Cleveland, WI USA
Not sure what he's gonna do to select the RPMs to cut out at. He said he had that figured out already. I'll have to ask.
If I cut it out on the primary side, wont it kill ALL the plugs?
Kevin K.
If I cut it out on the primary side, wont it kill ALL the plugs?
Kevin K.
