I was just wondering how much it brings the power down for those who can't get the 93. Anyone have any numbers?

 

from what im seeing id say 20-25whp.

although thats just a guess.
im seeing similar baseline numbers, but once the modding begins us on 91 seem to be falling short (obviously). its hard to tell cause different days, different dynos, different tunes/flashes, ect, but i think ive made a good guess

 

93 allows much more timing advancement where 91 sort of chokes that.

 

I doubt it's quite that high. I would say 10-15hp difference at most. And again, that depends on the dyno....

 

yeah to me that sounds about right.

 

could be, im mostly going off ets latest dyno of +107, compared to what i did with the same parts (different factory flash), similar dyno... so i was splitting the difference on the factory flash/octane

 

on a stock evo, prob only like 5hp..its the modified cars running higher timing and boost that need higher ocatne

 

I doubt its even that high. I would say 5-10hp at most on a relatively stock X. Look at Cobb Tuning's map notes where they show the difference between 91 and 93 octane is only 2-3%.

 

This is just one car so just a data point, but here is a difference between 91 and 93, tuned for both (modded Evo 9)

 

so 308 hp for the 93? Just making sure i'm reading that correctly

 

yes higher numbers are 93.

 

hmmm, well then it's quite a bit more power than some of the guesses have been here. I had no idea really which is why I asked. I just remember years ago reading about Cali's 91 gas that they all seem to hate so I just wanted to know how lucky I was lol.. I guess pretty lucky

 

Kalifornia 91 is pure crap, much crappier than just the octane number suggests.

Yes, you are lucky.

 

try 90.. thats the best we can get @ almost all pumps (at twice the price of your 93)

 

yeah... that does indeed suck lol. We're at 2.05 a gal here.