I own a stock 7710 w/a Denso mechanical pump. How would I go about changing the injection timing for more power and adding more fuel? I just dynoed the tractor at 157hp but I know that these engines can make up to 300+. This will not be a pulling only tractor but I wanted to play with fuel and timing to get the most out of it in stock form. I also have a straight pipe on it. Thanks for your time.