Mods are below in my sig. I changed the exhaust to Fabspeed Cat and Muffler By-Pass Pipes, so essentially I am running straight pipes. I don't have the GIAC controller to put my car in "Race" mode. What will happen if I fill with 110 Leaded Fuel??

 

nothing... too much octane for your application - you could lose performance.

- chuck

 

nothing since you dont have cats. C16 burns slowly so you can run more boost without harmful effects of detonation. however the timing needs to be adjusted to maximize what you for results. ditch the GIAC and run Softronic so it automatically adjusts based on octane you use for maximum performance.

 

Yeah thats what I thought. I will be upgrading to a GT700 soon. Any GT700 owners want to chime in??

 

I have been told that high octane lead fuel will damage your o2 sensor . I use in my cars 107 RON ELF unleaded racing fuel to avoid damaging the sensor. The JUN drag CRX I use VP C16 as I don't have a sensor.
Some sensors could work with lead based fuel but I would check for more info and if you don't care about cost you can just change the sensors after 6000 miles to be safe