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| Tractor Pulling Discussion Forum |
Topic: Re: John deere G compression/ignition help
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| jd b puller
03-08-2013 18:50:26
65.190.129.111
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4010,No set RIGHT way to know where to set it without a dyno. As you roll it forward, it RETARDS it. Depending on compression and fuel, somewhere between 18-28 degrees works good. if he"s high compression, you will have to move the governor gear a tooth to get the mag to work. Nice thing about a mag is you can set cranking and runnng sparks independantly. You"d have to get someone to change the guts in the distributor to do that. Never had to have stiffer springs due to compression, just RPM"s. My mag worked fine at 11+ compression.
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| 4010 puller
03-09-2013 04:15:07
70.199.1.120
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Re: John deere G compression/ignition help in reply to jd b puller, 03-08-2013 18:50:26
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| Is this a good general rule for stock or just for higher compression engines? 18-28* advance is good? That is with engine at TDC and distributor rolled counter clockwise?
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