I have a dyno tuned 93 octane map.

When I run 100 octane I pull 4% fuel, zero whatever timing I had pulled from my upper RPM range (normally 4 degrees), and run my boost to spike at 25 then fade to 22 at redline.

I would like to switch from 100 octane to 116 octane C16 race fuel.

On average, how much more aggressive can I be with the additional octane?

 

wow when you find this out lemme know i wanna run it too....hope you have a high end setup on your engine, cus anything over 110 will fry a catalitic conv..... and possibly your o2 sensors.....

 

Do I hear a GroupBuy on Front 02 Sensors! :P

I guess is prob as good as yours. Start with the 100 oc map and pull fuel slowly as you do WOT logs. Also watch your timing and knock voltage.

 

I believe the hot ticket for race gas is VP109. Its oxygenated and tends to pack a nice solid punch over 103 streetblaze. Sure after 100 or so gallons your O2 sensor might take a digger but they aren't that expensive. I have been pulling 6% fuel across the board with the 109. AFR's are mid 12s and no timing is being pulled. I tried C16 but didn't see any gains over 109. I feel that may be too much octane unless you can run crazy high boost which I cannot seem to do on the stock turbo. I see a spike of 25 and the it fades to 21/22 depending upon gear.

If you are worried about power.....the cat should be the first thing to go!

 

but i would imaging it would go ***** to the wall, hella fast, :P have fun