this is the site i use. it says a 89 Turbo supra runs a 15.2 and a 91 runs a 15.6.. depending on which year ur car is.. it also says my 86 supra n/a runs a 15.4.. hmm, anyways.. here's the site.. i think there's another site posted somewhere but not sure where.
http://www.albeedigital.com/supercou...0-60times.html