I've got a variety of exhaust system mods coming online within the next ~1 week (the longest dang week in recent memory) that replace everything in the exhaust except maybe the midpipe with catless/catback solutions. I believe that I can expect to get another 20-25 whp, according to the spec sheets.

Soooooo... the next step would appear to be to switch engine management systems. I'm thinking of the Cobb Stage 2, which comes in at least 2 flavors, one of which seems to tolerate 91 octane, the other calls for 93 octane.

I can get 91 octane pretty near anywhere in Cruces (also do a lot of traveling in Albuquerque) but where can I get 93-grade gas? Even if you only know about ABQ that would help.

Or, failing that, what do you do (if anything) to get 93 octane in (your town here)?

Thanx, Sev.

 

At higher altitudes, the lower vapor pressure makes 91 octane behave as 93 octane. I know Albuquerque is at 5000ft, so just go with the 93 octane map (assuming Cruces is similar). Of course, if you manage to get to a much lower altitude with that tank of gas, you'll get knock.

 

Well, you can get race gas at octanes well over 100, but they're going to cost you anywhere from $4-$10 a gallon, so unless you like getting raped everytime you need gas, it makes a lot more sense to get a 91 octane compatible ECU. Why chance your engine?