Hey guys, firstly thank you to everyone on here for the great source of information. It has helped me to run our very low budget aussie k boat racing team with very few issues and i am very greatful for your help. With our 16/71 hh i have been using the .36 x boost number method of determining nozzle area and have found this a very safe calculation to use. I have actually found .33 closer for what we need but i think that is due to the lower compression (9 to 1)on our endurance type application. We are now in the process of switching to a Whipple and aiming for 25 to 28 pounds of boost. My question is would i be safe to assume this .36 x boost calc is still the one to use, or is it too lean? Thanks in advance and once again for all the great advice that you guys post. Cheers Jamie.