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  #1  
Old 01-09-2017, 12:03 AM
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Tony
 
Join Date: Oct 2005
Location: Bandon, Oregon
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M117 camshaft timing signal

Has anyone done sequential FI and ignition (not wasted spark) on a M117? How did you get a camshaft timing signal? I don't want to get it from the distributor.
Thanks
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1971 280SE 3.5 Coupe(soon to be 5.6)
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  #2  
Old 01-09-2017, 01:54 AM
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There is no provision at all for a cam sensor in the 117 engine. You should reconsider your aversion to a distributor sourced signal. A true cam sensor will have to be engineered from scratch.

What system are you planning to run and how do you intend to control it?
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Old 01-09-2017, 06:36 AM
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Why not use a 36-1 trigger wheel? Plenty of those conversions already documented. There's a couple of guys on this forum who have done it.
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Old 01-11-2017, 12:49 AM
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I'm looking at all engine management systems-not just Megasquirt. The FAST EZ-EFI 2.0 seems like a powerful easy to set up system. But it needs a cam signal to run sequential ignition and fuel.
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1971 280SE 3.5 Coupe(soon to be 5.6)
European Version
Manual transmission
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  #5  
Old 01-11-2017, 05:03 PM
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Ok so any system needs a cam sensor to run sequential. It is the only way to determine overlap vs power stroke. Missing tooth trigger wheels will not take the place of cam sensor. You could weld on to the front of the valve cover and mount a sensor to read off a tab off the cam gear or weld on a tab to the washer in front. You will need to have this timed to the degrees or number of teeth from the gap in the crank sensor.
There is not a huge reason though to run sequential vs wasted spark. The engine will run smooth and have good power without. It is mostly an emissions issue.
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