Quote:

cranking pressure was 185#/cyl avg. not sure what octane i need but vp110 and shell 93 was clearly too much. tires are brand new. i will have to do some body work to get a 28" tire on there without rubbing. never rubbed with the ss springs but a 28" tire does with the cal-tracs.
at this point i would be better off putting the ss springs and the 28" tires back on and sell the cal-tracs,i 60 ed better.



At 185 you can run premium by it self but you want
to make sure its good quality and not all over the
place on octane.... I know when I went from 112 to
110 I picked up with no other changes