Easy to work out, look up the formula I posted on here a while ago, with the website addy where you just input the cc/lbs and details and hit enter does it for you.
What's wrong with greys ?, perfectly good and able IF mapped correctly, as my engine proves 0.97% CO, 137PPM GREYS T3/34 ported head and 200,000 miles on the engine, or is that bad ?
tabetha