from what i udnerstand, alky motors are alot more sensitve to being run lean or too much timing. am i right or wrong? i really don't know much about alky...
and, yes, when ever last hp is critical, its worth if you have the money. to me, it would never be worth cuz i just ride dunes/desert, and all the dynos in my area charge $20-$30 and around $100 to "rent" the dyno, so its just not worth it to me..