Originally Posted by im MartinB (Post 4894462)

Well I've blue printed a lot of boats over the years, mostly boats running 80+ mph. My boat was running 86 when I did the blue print.. and gained a whopping 1mph or probably a little less. I went back through my pile of cut strakes that I've collected over the past 30 or so years and realized that almost all the blue printing with the good gains were on stepped bottom boats. The one exception was a 32 Active Thunder and on that boat we cut off 18" of the strakes and he gained almost 6 mph. I couldn't find anyone out there with any info on the 31 SS so I didn't want to cut them off, even though I can put them back on, but I hate putting them back on it takes so much more time. This boat has a serious brake pedal and I'm struggling to find out how to release it a little. I've switched every damn part in the engine compartment to aluminum and then got rid of the slid out filler cushion to keep things balanced.. that gain was damn near 0. I'm pretty darn determined to get to 90 NA, but I'm running out of options. As near as I can tell I need to either notch the transom... BIG job and no way to know for sure. Cut the strakes easy job but if it's bad it takes longer to put them back. I'm gonna do a temporary strake extension on the lower strakes.. I don't think to the transom would be good because the would def add a lot of transom lift.. This boat stays really hooked up and nothing I've done thus far has had any negative effects so I think I just need to keep trying. One thing I find interesting is the high slip with Bravo ones, usually 22% and yet in the rough water I stay hooked up unless I'm in the air... Running alongside a friends 38 Sonic I can hear his drives breaking loose quite a bit and he runs with lower slip numbers... and same props. His boat has the notched transom.

Originally Posted by im MartinB (Post 4894463)

I've never had this issue at wot on a boat before... On my 26 Sonic that I had for a while it would bounce if you trimmed to soon. As soon as you got on the throttle though it went away or put the drive back down. My guess is if you added 500lbs to the bilge the problem would go away... so you need to get ride of some transom lift somehow. I'd be trying 3 4 and 5 blade props first because it's so much easier. I fixed a horrible 280 Velocity that was scary above 70 just by going to a P5X prop. Boat runs 85 now and my wife can drive it too.

Originally Posted by im MartinB (Post 4894462)

Well I've blue printed a lot of boats over the years, mostly boats running 80+ mph. My boat was running 86 when I did the blue print.. and gained a whopping 1mph or probably a little less. I went back through my pile of cut strakes that I've collected over the past 30 or so years and realized that almost all the blue printing with the good gains were on stepped bottom boats. The one exception was a 32 Active Thunder and on that boat we cut off 18" of the strakes and he gained almost 6 mph. I couldn't find anyone out there with any info on the 31 SS so I didn't want to cut them off, even though I can put them back on, but I hate putting them back on it takes so much more time. This boat has a serious brake pedal and I'm struggling to find out how to release it a little. I've switched every damn part in the engine compartment to aluminum and then got rid of the slid out filler cushion to keep things balanced.. that gain was damn near 0. I'm pretty darn determined to get to 90 NA, but I'm running out of options. As near as I can tell I need to either notch the transom... BIG job and no way to know for sure. Cut the strakes easy job but if it's bad it takes longer to put them back. I'm gonna do a temporary strake extension on the lower strakes.. I don't think to the transom would be good because the would def add a lot of transom lift.. This boat stays really hooked up and nothing I've done thus far has had any negative effects so I think I just need to keep trying. One thing I find interesting is the high slip with Bravo ones, usually 22% and yet in the rough water I stay hooked up unless I'm in the air... Running alongside a friends 38 Sonic I can hear his drives breaking loose quite a bit and he runs with lower slip numbers... and same props. His boat has the notched transom.

Originally Posted by im MartinB (Post 4894462)

Well I've blue printed a lot of boats over the years, mostly boats running 80+ mph. My boat was running 86 when I did the blue print.. and gained a whopping 1mph or probably a little less. I went back through my pile of cut strakes that I've collected over the past 30 or so years and realized that almost all the blue printing with the good gains were on stepped bottom boats. The one exception was a 32 Active Thunder and on that boat we cut off 18" of the strakes and he gained almost 6 mph. I couldn't find anyone out there with any info on the 31 SS so I didn't want to cut them off, even though I can put them back on, but I hate putting them back on it takes so much more time. This boat has a serious brake pedal and I'm struggling to find out how to release it a little. I've switched every damn part in the engine compartment to aluminum and then got rid of the slid out filler cushion to keep things balanced.. that gain was damn near 0. I'm pretty darn determined to get to 90 NA, but I'm running out of options. As near as I can tell I need to either notch the transom... BIG job and no way to know for sure. Cut the strakes easy job but if it's bad it takes longer to put them back. I'm gonna do a temporary strake extension on the lower strakes.. I don't think to the transom would be good because the would def add a lot of transom lift.. This boat stays really hooked up and nothing I've done thus far has had any negative effects so I think I just need to keep trying. One thing I find interesting is the high slip with Bravo ones, usually 22% and yet in the rough water I stay hooked up unless I'm in the air... Running alongside a friends 38 Sonic I can hear his drives breaking loose quite a bit and he runs with lower slip numbers... and same props. His boat has the notched transom.