2010 has the bullitt technology in it i think and does get a couple (3-5 hp at most probably) gain from the 91 oct

 

Correct, the '10 GT's use a tune similiar to the Bullitt and will pick up some minor gains as howarmat mentioned. A good aftermarket tune should tack another roughly 12-15 RWHP with the higher octane fuel over the stock tune with the same fuel.

But I think I don't fully understand... You were racing. But didn't go over 4k RPM... and didn't go over 55 MPH? I'm over 55 before I shift out of 2nd... How do you even have time to tell he was casually pulling on you?

 

I find more mpg's along with a little more pep, I can say this cause I have gone from stock CAI, to stock CAI W/ K&N dropin with a 87 tune, then going to a JLT CAI with another 87 tune, and differ, octanes will produce results even if small, just like everyone that dumps the stock drive shaft for a one piece shaft.

 

I've been running 91 for awhile and I can't tell the difference between that and 87.

 

try 93, or around here we have 105 too

 

dont run the 105....and you might not see any difference with the higher octane (91-93)....the gains are pretty small

 

i knew if we kept going he would continue to get further away from me, after just going to 55 he was already about half a carlength ahead of me.

sounds like i should bite the bullet and just start using 93 octane.

 

I don't think you could gain much without a tune going from 87 to 93. Time for a tune.
Was the "race" from a dig?

 

A mere octane change is not enough to put you past the 370z, however if you raced from a rolling kick down you would take him.. Our cars spin more tire then the z because v8 makes more low end torque. A rolling kick down when both cars already have traction is where the real winner shines..If you want to be certain, get a tune, a k/n drop in filter, a real axle back exhaust and a lightweight 1 piece drive shaft and you will be set...

 

skip the axleback it aint going to add anything....you need to drop the cats to get some gains exhaust wise