View Full Version : Crate 604 spark plugs
circle dirt
03-19-2016, 10:08 AM
Switched to a 604. Any suggestions on spark plugs??? Running alky. Thanks
Matt49
03-19-2016, 10:49 AM
NGK #7317
gap to .035
circle dirt
03-22-2016, 06:44 PM
need a little more help here. Can find a 7317 NGK plug
hammond motorsports
03-22-2016, 07:17 PM
5724-8 was what I sold mostly to the 604
Matt49
03-22-2016, 07:47 PM
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-v-power-racing-spark-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.
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
03-23-2016, 11:12 AM
Check your local Wally World. Some carry those.
circle dirt
03-23-2016, 08:50 PM
thank you ,,this helps
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