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Advancing the ignition "too much" according to the OEM can increase power, increase fuel economy, make starting easier and increase NOx.
So do some ABA testing, you may find the further advanced ignition is better for FE.
Giving an otto about 8 more degrees of advance over OEM recommendations is pretty common.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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