 Increase sparkplug gap with CDI ignition box??, for /4 motors :) |
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| Mueller |
 Jun 14 2005, 01:57 PM
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914 Freak!  Group: Members Posts: 17,155 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None 
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taking tommorow off from work to hopefully "fix" my ignition and fine tune the fuel injection.....according to what I can find, the stock sparkplug gap should be .7mm (.028") for my 1.8 motor.
I thought that with the CDI such as a Mallory or MSD, I could open the plugs up to .050-.060" (according to MSD documents) anyone have any real world experiance with this?? thanks |
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| ArtechnikA |
Jun 14 2005, 02:09 PM
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
i use 0.046" with my Crane HI-6. seems to work just fine.
i selceted 0.046 because in my feeler gauge set, there is a 0.022 and a 0.024 next to each other, and that's as big as it goes. probably to be scientific, you'd increase it 0.001 at a time until you saw a jump in HC at peak cylinder pressure. i just picked an arbitrarily large size i could easily measure and decided it was good enough. the spark plugs you use will make a small difference, at the limit, and you'd better have good spark plug wires. |
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Posts in this topic
Mueller Increase sparkplug gap with CDI ignition box?? Jun 14 2005, 01:57 PM
DNHunt Mike
I used a .048 gap with a MSD 6A. I also use... Jun 14 2005, 02:14 PM Joseph Mills <... Jun 14 2005, 02:26 PM john rogers Well, when I put in the MSD system in the race car... Jun 14 2005, 02:31 PM Joe Ricard ... Jun 15 2005, 07:03 AM |
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