Crate 604 spark plugs

[circle dirt]

Switched to a 604. Any suggestions on spark plugs??? Running alky. Thanks

[Matt49]

NGK #7317
gap to .035

[circle dirt]

need a little more help here. Can find a 7317 NGK plug

[hammond motorsports]

5724-8 was what I sold mostly to the 604

[Matt49]

Sorry...I should have provided more info. R5724-8 is the part number for the NGK #7317 plug (makes perfect sense, right?)...
http://pitstopusa.com/i-5058545-ngk-...plug-7317.html

It's also worth noting that (according to several reputable engine builders) indexing is a complete waste of time with the crate motors.

[RCJ]

Not a crate racer but, I've seen autolite AR (racing) plugs make more power than ngk every time.With the extended tips, like 3911, making more than the standard tips in our spec motors.

[a25rjr]

Check your local Wally World. Some carry those.

[circle dirt]

thank you ,,this helps