Quote Originally Posted by Ondonti View Post
Twin scroll housing A/R's are not comparable to single scroll A/R's so you also can't compare #'s
I measured mine and would say you are wrong. Possibly with some manufacturers but this can't be used as a blanket statement. An A/R is simple math that describes the cross sectional area of the scroll. With every turbine housing out there being designed on a computer this is a very easy number to calculate and get right. I would give my degree away if I designed a housing and got it wrong.