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could runing 87 octane cause me to go from a 13.2 to a 13.7 ?i run the 13.2 on a mix of 2 gal of 93 and 3 gal of 110 and the 13.7 was on a full tank of 87
__________________ my daliy driver is a 89 formula 350 with 9.75 cr ,195 trick flow heads, xe274h cam, holley intake, holley 750dp, t5, posi 3.73. best of 12.985@ 102 cutting out. sunday drive run on bald street tires 14.0 @104.95.
Last edited by intex1982; 06-23-2007 at 03:13 PM.
Reason: sound better
Lol he asked if running 87 octane would slow him down by half a second in the quarter mile. He used to run a 13.2 1/4 mile using 2 gal of 93 octane mixed with 3 gal of 110 octane. Now he runs a 13.7 1/4 mile with a full tank of 87 octane.
My response is that part of it could be the added weight of a full tank. If you ran a full tank, you ran three times the weight in gasoline that you normally do (6.2lbs/gal, 15.5 gallon tank = ~96lbs; 5 gal = 31lbs)
Lol he asked if running 87 octane would slow him down by half a second in the quarter mile. He used to run a 13.2 1/4 mile using 2 gal of 93 octane mixed with 3 gal of 110 octane. Now he runs a 13.7 1/4 mile with a full tank of 87 octane.
My response is that part of it could be the added weight of a full tank. If you ran a full tank, you ran three times the weight in gasoline that you normally do (6.2lbs/gal, 15.5 gallon tank = ~96lbs; 5 gal = 31lbs)
two weeks ago i run that 13.2 no changes to the car but that gas i run 13.7 same track and all.
With a 10:1 CR and aluminum heads it is very reasonable. That combo is not at its best performance with 87 (high CR and aluminum heads with a higher fuel volatility, ie low octane, = poor performance).
With a 10:1 CR and aluminum heads it is very reasonable. That combo is not at its best performance with 87 (high CR and aluminum heads with a higher fuel volatility, ie low octane, = poor performance).
Mods so far: MSD Cap and rotor, MSD ignition coil, Accel 8.8mm ignition wires, Hooker Super Comp Shortie Headers, Flowmaster 3in catback, underdrive crank pulley, custom cold air intake, NOS wet 125 shot, air foil and a lead foot! no E/T's yet. ...TURBO COMING SOON...Other mods include keyless entry and remote start, and Sequential Turn Signals.
