Pump octane goes up to 91 correct? Anyways, how much HP would you need to be out of the range of 91 octane gas? I see 400 rwhp rx-7's posted on the forums...can they run on premium gas at the stations? thanks for the help

 

I run 93 or 94 octane here.

 

It's entirely dependent on your fuel/ignition/turbo setup. If all aspects are dialed in, you could get 800 hp out of pump gas if you wanted to. It's learning to get to that point safely that's the hard part.

 

Guess Cali gets screwed.. 93 is premium over here in TX.

 

love my sunoco 94 its all i use

 

93 here in NC too. Or you can go with the 100 for 3.99 /gallon. When my dad drives my car everyonce and a while he will put 5 gallon of this in. You can feel a hell of a difference.

 

what can the stock pump handle? not to highjack, but im just wondering since you brought up the pump.

 

0110-M-P,

Octane is resistance to burn. Putting even 200 octane into your car is not going to make it anymore faster unless the car is set up to use it.

 

A speedway here in Chicago offers 110 octane for $3.59 a gal

 

Run the highest octane gas that is avalable in your area of the country as a rule of thumb. From what I have read, cali redily offers 91 octane. This will be fine. Be sure to get your BNR's tuned with this in your tank so you can have a more reliable set up for driving. HP is not based on fuel octane levels but on turbo/intercooler set up for your car. Higher octane gas helps prevent detination under load.

Get your car tuned on a dyno by a profesional who knows his way around a PFC.

 

The higher the octane, the lower the burning temperature = less power... You need to be tuned to take advantage of higher octane fuel. The reason to run a higher octane on a street (untuned) setup is for that extra marjin of safety.

 

110 octane is usually leaded, which is fine if you're running a midpipe (no worries of ruining your hi-flow cat). Unleaded high octane would be Sunoco GT at 104. I run a midpipe, so I can put 110 octane in my fuel tank As others posted, the higher the octane you put in, the larger the safety margin and protection from pinging (detonation), which is a result of turning up the boost and momentarily running a lean AFR during a transition boost spike (assuming you have sequential twins).

 

I started thinking about upgrading my pump once I passed 300 at the wheels, along with bigger injectors.

Also, I make ~400 to the wheels on 93 octane all day, every day.