LS1_PNYTAMR

iTrader: (1)

as the title says.. im thinking .045-.050..

LS1_PNYTAMR

iTrader: (1)

car was backfiring a lil on decel with champions of stock heat range... the 104's are supposed to be tr6 equivelent.. ill prolly put them at .045

LS1-450

iTrader: (33)

I use Autolite 103's @ .046 (head/cam) without any problems. If 104's are TR6 equivallent, they might be too cold for stock.

LS1-450

iTrader: (33)

I use Autolite 103's @ .046 (head/cam) without any problems. If 104's are TR6 equivallent, they might be too cold for stock. BTW, the only time my car backfired was with a gap too large (.055 was too large w/ my set up) , so maybe the Champions had a large gap?