Of course it is frustrating when a Porche 911 flies by my Honda Accord... but they are apple's and oranges.

You really should be comparing your cat performance to other 5.7's if you can find them.

It is good (or great) to learn about your boat, sails, fine tuning and all.. but its not really relevant to compare how a 25 year old design works against a newer boat (IMHO).