Try advancing the timing some.
The OEM can only set and recommend the vehicle be set to pass EPA standards.
The slightly retarded factory timing will decreate NOx and send more heat out the exhaust to get the catalytic converter going.
Advanced the timing may increase NOX production a little, but could increase horse power and increase fuel economy.
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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.
Last edited by oil pan 4; 05-03-2017 at 08:16 PM..
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