Plug gap setting with MSD 6 ?, Technical help and opinions please - |
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Plug gap setting with MSD 6 ?, Technical help and opinions please - |
David Mueller |
Mar 31 2005, 08:21 AM
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#1
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Member Group: Members Posts: 79 Joined: 4-February 03 From: Calgary, Alberta Canada Member No.: 236 |
I've a '74 2.0+ runing a set of 44 Webers - MSD dissy and MSD6 control box - and I wanted some help with set up - I've been reading here about what people recommed for set-ups and I wanted some more opinions which on this site should be easy to get...
I'm running NGK BP5E S Plugs currently gapped @ 0.40 is that about right ? Webers - 36mm venturies - F11 - 140 Mains - 200 A/C - 55 Idles Main fuel inlet needle jet is a 175 - I've tried 50 idles any they don't work well on the fuel up here in Canada - I live in Calgary AB which is about 4500' - 6500' depending on the weather... I've seen people saying they are runing about 12 degree initial timing with a 29 max advance timing - I haven't changed out any springs or bushings in the MSD dissy yet..Most people are running the mallory when you put int he grey/grey springs what kind of a torque curve does that give you as I can match with the springs form the MSD - is the grey/grey combo the fastest spin up / medium etc... Any help would be appreciated... Other info on the car if it's needed - 96mm big bore kit from EBS racing -, aux oil cooler, high output oil pump, CB perfromance hex bar linkage, MSD Blaster 2 coil with 8mm Jacobs leads, Help anybody ? |
Mueller |
Apr 1 2005, 10:55 AM
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#2
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None |
just remember that with electronics, the "spark" will occur at the path of least resistance, so the bigger the gap, the better your wires, cap and everything else has to be
in other words if you get a nice spark at .040" with crappy wires and then set the gap to .060" with the same wires, the new gap might be too much, so the 20K volts will try to find an easier path, which could be thru the cover of the wire. It appears you have all brand new items, so you should be okay. in theory, you want the largest gap possible that will still ignite under pressure, a small gap is easy for the spark to jump, a larger gap gets the spark excited and it has to "explode" more to get across the gap.....also, a higher compression engine will have more cylinder pressure and the gap might have to be smaller.... I'd start at the .040" or so and test the car out, make sure you put a good load on it, such as hill....then you can slowly increase the gap until you feel that the car is not responding |
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