Last night.
I went to the track and ran consistant 14.8 with 87 octane in the tank. My 60ft times were right around 2.2 consistant w/ .2 reaction times with minimal spin. I dropped some weight by taking out my spare tire.

Before last night.
I was running consistant 14.6 with 91 octane in the tank. My 60ft times were in the 3.0 range and slightly slower reaction times with major spin. Weighed more with spare tire and other stuff in the car.

Would just the octane of gas create that much of a differential in 1/4 mile times. I know I can run much better 1/4 mile times especially with weight dropped and much more consistancy that I have learned. The car just did not feel like it had the power near the top end.

HELP??????

 

Traction is a huge factor, and it can vary from track to track and from run to run. For example, I ran everything from 14.5's to 13.9's with my stock Bullitt...It just depended on traction.

Another huge factor is weather. Heat and, especially, humidity will rob you of horsepower every time. If you just want to go to the strip and test your car to see what it will run, I highly recommend going in January...

 

track condition plays a big roll, if the track isnt prepped or prepped good than youll spin more causing lower ets, rule is for every .1 off your 60ft is .2 off your et.

 

I had better traction last night and better 60ft times than before

Hence why I am lost????

 

Yes the difference in Octane can make a power difference. While none of our cars(LS1 or stang)must run 91 octane, it is recommended. Running lower octane can be sensed by the car and it may or may not kick down the timing to compensate for the possibility of detonation.

 

temp and humidity and altitude can make huge difference.

 

60ft is the problem, ive raced at two tracks one i ran consisten 9.3's withthe best of a 9.2 the other i ran consistent 9.0 with the best of a 8.9 it was about 60 the day i raced at the second track about 75 the day at the other no changes in the car minus going from weld on flows to magnaflow catback

 

there are many factors as you can see in drag racing at a track. but from your times, the higher the octane the better times. i bet most of us here can agree that a 4.6 or 5.0 runs like crap on 87. i know mine does but its got some miles on it (120k). my car seems sluggish with 87 and some pinging in the engine. on 93 it runs real smooth, shifts great and sounds a whole lot better as well as much better respone when given some throttle.