ok i have a ?. i have a 95 z with a 383 LT4. am planning on running a 125sht, by adding 100 lead racing fuel and mixing it with 92 octane fuel will that increase hp in my car ? or will i see any difference at all? thanks

 

I don't know about increasing horsepower but it will keep you from detonating and wrecking your motor.

 

thanks.

 

If you plan to use leaded racing fuel, you must be running on open loop tuning (no O2 sensors) and no cats. The lead will destroy the sensors and the cats. Just curious... why would you use leaded fuel, when 100-octane unleaded fuel is available?

 

Here is an awesome Fuel Blending Chart!!!
http://www.ranney.com/~mjr/fuel_blend.html

 

Why not use Motorsport 103 or something similiar???????