192mm??? That's a new one to me. You should be around 20+psi with that, unless you have NW manifolds.

And as far as EC building S/C pulleys... it's about time! lol. Thank god someone is stepping up to do them. I know they probably aren't a huge profit item. But, the more pulleys you sell, the more tunes you'll sell...

Blake, I think your math is a good way to take all the variables out (other mods, air temp, altitude, etc). Will you 'need' a tune, no. Will it fine tune it to get the most out of it, yes. Personally, I'd hold out for EC to have a pulley and get a combo deal w/ a tune... just my .02