My partner and I own a 1967 Tartan 27 which has a full keel and a centerboard. We started doing the weds night beer can races and enjoyed it. We enjoy having a 240 PHRF rating which always helps us beat some fin keel boats that croos the finish line ahead of us. One thing we have noticed with our boat and the 150% RF genoa we currently have is that we can not head upwind as much as almost all the other boats which I think all have fin keel hulls or similar. We are lucky if we can get between 40 to 45 degrees into the wind.My partner wants us to get a 176% genoa like the one that came with our boat and was shredded in an accident 3 years ago. While it would be nice to add to our sail inventory I am quite happy with the 150% and think that it is better balanced with our full batten main than the old sail. In lighter airs (<15) the 176% might be nice to have and would certainly make us go faster on most points of sail. In winds greater than 15 I think the sail we have now (150%) is more than adequate and again is well balanced with the main with a reef or two.My questions to the knowledge base out there are these: 1) Does anyone think that a larger sail on our boat with its full keel hull shape will help our boat head upwind better or would the larger genny help us go faster but not head up any better or perhaps worse?2) Does anyone think that with better sail trim with our existing 150% genny that we could achieve better upwind performance?I should say that we have mostly been just cruisers and I would categorize us as novice racers who are eager to learn.I hope I have not left out some crucial detail that makes these questions unanswerable and humbly await my come uppance.Thanks in advance.Caleb Davison