Hey guys my plugs turned blue so I'm running 100 shot,125 at track.Yes I went with 2 number down on plugs heat range.
I can't figure how to retard timing on the m104,to use a bigger shot.

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1983 300 SD strait exhaust,wrapped also,true cold air,monark injectors,no ALDA .15psi summer winter 18 psi

1999 S320 cold air intake,one muffler,Nitrous kit 125
shot ,ceramic brake pads,removed belly pan,hood slats,and modified grille for cooler air.
no kittens Denso plugs 170f thermostat,best time so far 14.67 in the 1/4. wrapped exhaust, Borla'muff
215 55 16 front tires The Runaway Files by Tennessee Nate