ORIGINAL: nissan300ztt
You don't have to use it the life of the engine, it just means that if you change the percent then you have to retune.
Well I didnt know that. I had a bad experience going to 30% nitro to 20% on my picco .28 p3 on my REVO The engine started running really sluggishly and didnt wanna go more then 25mph. The throttle would open full but would only get 1/2 power.
Oh okay ive never gone down a percent i went from 16 to some 25 percent and the performance was better but i didn't retune so I may have knackered the engine. Next time I buy a gallon ill probably get some 20% O'donnel as thats going cheap. (For my Hper not the engine i knackered).