Which Fireball? There's been several. From what I gathered, this was one of the more common ones.
286 Fireball
Specs are:
286/292 Adv. Dur.
213/220 @ .050"
.434"/.450" Lift
110 LSA/106 ICL
Crane still sells a lot of their old grinds under different names like the Energizer series. They even have a Fireball II series. But I must say there's HUNDREDS of better grinds available that will give a lot better performance and street manors!!:yes:
But....Here's a couple similar grinds.
Crower #60918
288/298
214/224
.444/.467
112 LSA
and
Summit #1103
272/282
214/224
.442/.465
112 LSA
Note:
The advertised duration numbers have changed over the years because of the different measuring techniques.:yes: That's why the duration numbers @ .050 became a more common number to use for comparisons and performance predictions (rpm range, etc.)..