Update on the Compu-fire conversion, 2 week update |
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Update on the Compu-fire conversion, 2 week update |
underthetire |
Mar 11 2010, 12:27 PM
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#1
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914 Guru Group: Members Posts: 5,062 Joined: 7-October 08 From: Brentwood Member No.: 9,623 Region Association: Northern California |
My first ignitor was a Hot Spark, It looks and acts just like the Pertronix unit with the small magnet ring. Worked fine until I had a small melt down, not the hot sparks fault (IMG:style_emoticons/default/biggrin.gif) . What I had noticed since I use the megasquirt, and put my scope meter on it to confirm, is during cranking i never got a nice clean square wave signal out of it. Once started , it was fine. This time I opted for the Compu fire conversion, since this has a large disk that passes over the top of the sensor. The disk has small magnets on the outside edge, allowing a higher surface speed over the sensor. Cranking signal has cleaned up by a factor of 2 to 1. My idle is now way more solid than with the little ring magnet sensor type of pickup. So, in conclusion, the signal coming from the Compu-fire is much cleaner, allowing better idle control for my application. 2 weeks in so far. I obviously can not attest to longevity yet.
Either one IMO works well for carbs, or stock FI, but so far, I prefer the compufire for my aftermarket FI. Attached thumbnail(s) Attached image(s) |
Katmanken |
Mar 11 2010, 12:39 PM
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#2
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You haven't seen me if anybody asks... Group: Members Posts: 4,738 Joined: 14-June 03 From: USA Member No.: 819 Region Association: Upper MidWest |
Thanks for the insight.
I no longer have access to a scope to check the signal output from something like that. Cleaner signal means a greater chance of firing on time. Now you get to do the reliability test for us to see how long the parts will work. Also might want to check signal degredation over time to see how the parts hold up. The engine environment (heat, vibration) can cause sensors to crap out. I know the dizzy sensors in my wasserboxer Vanagon craped out at about 60k. |
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