103s or 104s

Just looking for a few opinions here on what spark plugs would be best for me to run with my current mods. Autolite 103s or 104s? My mods are: 3.25 pulley, jimmy c 3" downpipe and highflow cat, TB spacer, Alky, Wizair intake, DHP 1.0, Cat Back Exhaust, 1.9 modified rockers, mini afc, and 180 t stat. Also if anyone could give me a rough guess on what they think i could or should be hitting in the 1/4 that would be cool too.


thanks

With your mods you can use either heat range spark plug. Autolite 103 = 3 colder, Autolite 104 = 2 colder. I switch out depending on conditions and how much knock retard (KR) Autotap or my scanner gauge shows. Currently, I'm using 103s with my mods.

On 1/4 Mile ET the best thing to do is take it out to the local dragstrip, otherwise its just speculation and it is really hard to say.

depending on your launching skills i'd say a high 13 low 14... some people with more mods seem to run slower than less modded people sometimes

Just looking for a few opinions here on what spark plugs would be best for me to run with my current mods. Autolite 103s or 104s? My mods are: 3.25 pulley, jimmy c 3" downpipe and highflow cat, TB spacer, Alky, Wizair intake, DHP 1.0, Cat Back Exhaust, 1.9 modified rockers, mini afc, and 180 t stat. Also if anyone could give me a rough guess on what they think i could or should be hitting in the 1/4 that would be cool too.


thanks


You will be a mid to low 13 with a 3.25 pulley and the alky. I know many that are. I dont know if you have the DHP Power Tuner, but that will help greatly