They say 158° on the nozzle.

 

is that wat bar is?

 

That would be the cone angle, they are 7x0.010" in stock trim.

 

i dont understand

 

ok the stock pistons you have in your truck have 145* bowl. your trucks stock injectors have a 145* cone. The 370's your running now have a 155* cone the new 7x.010's have a 158* cone. With the higher cone and the smaller bowl you have to run less timing to stay in the piston bowl.

 

so if i get 7x10's i wont be able to advance much

 

Correct, the fuel won't hit the piston bowl and you will run higher egts

 

According to Lee the set he`s building for me are 145* nozzles FWIW.

 

good ill do the 145 so i can run 18* timing

 

Ive chatted with Kevin a couple times about them and he says they are 148°. Is there two possible nozzles or what else could be going on?