autolite 605's or 104's ?

[Doug 97 gtp]

i dont which plug to use. my car has 3.5 pulley 90# springs, intak,e headers, 3 inch dp, no cat, vs cam, 180 tstat and a ported blower. i have 605's in it now with no tune. should i run 605's or 104's ? the car is a 97 gtp

[Iceman6669]

104s

[DanPrixGTP]

^ 104's.

[Fivefingerdeathpunch]

605's.

[Iceman6669]

Just had to be different didnt you FFDP???

[matt5112]

How are the 605's burning?

606 might even be the correct plug.

[Timing]

you want to run the hottest plug possible

[Doug 97 gtp]

i know that ^^ the 605's seem to be running a little cold but i also dont have a tune yet. i feel that the 104's might be to cold. when i put the pulley on my car i drove it around the block and it had 0.0 knock so i think i might stick wiht the 605's.