Originally posted by Boit:
On the advice of Rich Rohrich, I've been experimenting with VP MR2 fuel. While this fuel was aimed at the 2-strokers, it is also an excellent choice for the 426 due to its light-ends.[ November 15, 2001: Message edited by: Boit ]
VP MR-2 is a great fuel. I simply cannot justify $9.00-$10.00 a gallon for it. I use Unocal 110 (The official fuel of Nascar!!) and have found that it works better than VP Red. It is usually a bit cheaper that VP Red fuel and performs well all the way up to the rev limiter.
As Boit mentions, race fuel will enhance performance over pump gas. Jetting the bike correctly will make it run better regardless of what fuel is used.