Octane

[Homeslice]

Originally Posted by Sean

The car wants 93 but we only get 91 at the pumps, so when I do a track day or some hard canyon miles I have to mix in 4 gallons of 100 to get it up to 93. It's annoying. Some 76s out here have unleaded 100 at the pump, but they're not exactly common.

The higher up you go (in altitude), 91 will start to perform like 93 anway.

[Sean]

Originally Posted by Homeslice

The higher up you go (in altitude), 91 will start to perform like 93 anway.

So I should move all the tracks to higher altitude?

[Homeslice]

Originally Posted by Sean

So I should move all the tracks to higher altitude?

Aren't most of the tracks down there sitting at 2K feet or so? Which is higher than sea level at least.......lol

[Cutty72]

Originally Posted by Sean

So I should move all the tracks to higher altitude?

no, cause it's harder to make power.

[racedoll]

Originally Posted by Sean

Bike wants 89, I put 89 in it if there are separate pumps but if there's just one I figure the half-gallon of 87 that could be in the pipes would put it under that so I put 91 in there.

I wondered if anyone would bring this up/point this out. It is something to consider.

[Homeslice]

Originally Posted by Cutty72

no, cause it's harder to make power.

the point is, at higher altitude you don't need as high of an octane.