Engine runs without cam signal

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Mud Flight
MS/Extra Newbie
Posts: 3
Joined: Sun Nov 12, 2017 3:40 am

Engine runs without cam signal

Post by Mud Flight »

I am running a ms3 with a 36-1 on crank and a single tooth with cam sensor mounted on my dry sump pump.
It all works well, but the idea was that if I lost the belt of the pump the engine would stop.
Not so, it will just keep running even at 8500rpm
Is there a ignition setting that will work for me to stop engine or dose it just need cam sensor for starting?
grom_e30
Super MS/Extra'er
Posts: 4451
Joined: Thu Mar 08, 2012 12:44 pm
Location: UK

Re: Engine runs without cam signal

Post by grom_e30 »

with a missing tooth wheel the cam signal is only used to sync up after that its not used again until you need to re sync. i think a non missing wheel would work the way you expect it ie engine will cut out without the cam signal
1990 bmw 320i daily driver with m20b25 ms3 sequential fuel, 380cc injectors, d585 coil near plug, home made cam sync, launch control, fan control, vss, homebrew egt logging what's next????
billr
Super MS/Extra'er
Posts: 6828
Joined: Sun May 15, 2011 11:41 am
Location: Walnut Creek, Calif. USA

Re: Engine runs without cam signal

Post by billr »

Don't mess with a simple, reliable 36-1 that is already in place, use an oil-pressure switch/sensor. Also, that will protect you from oil-pressure failure from any reason, those addition to just the belt.
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