Twin engine Heat?
06-01-2011, 03:30 PM
#11
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No kidding- GPS confirmed multiple times.
I spoke with a guy who had an early 2000's open bow heat and he said the same thing as Indy. He could only get mid 60's out of his as well. However, he was running a 24 pitch prop (mine is a 26). I do know that the open bows are generally a little slower due to more weight and less favorable aerodynamics. Also, the newer boats (not sure what year they started, maybe 2006 or so) are wood free and weigh about 400 lbs less. Also, the guys at Unlimited told me that they have had boats, including mine, that came from the factory in need of throttle adjustment. In other words, throttle down did not actually generate WOT. They said that mine was that way and would only run mid 60's before they adjusted it. Just a few things to consider..... But I am totally serious about the speed. It also sounds much better. Though, I don't really notice much difference below 60 mph. Above 60 the headers definitely help.
I spoke with a guy who had an early 2000's open bow heat and he said the same thing as Indy. He could only get mid 60's out of his as well. However, he was running a 24 pitch prop (mine is a 26). I do know that the open bows are generally a little slower due to more weight and less favorable aerodynamics. Also, the newer boats (not sure what year they started, maybe 2006 or so) are wood free and weigh about 400 lbs less. Also, the guys at Unlimited told me that they have had boats, including mine, that came from the factory in need of throttle adjustment. In other words, throttle down did not actually generate WOT. They said that mine was that way and would only run mid 60's before they adjusted it. Just a few things to consider..... But I am totally serious about the speed. It also sounds much better. Though, I don't really notice much difference below 60 mph. Above 60 the headers definitely help.
06-02-2011, 06:08 AM
#12
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No kidding- GPS confirmed multiple times.
I spoke with a guy who had an early 2000's open bow heat and he said the same thing as Indy. He could only get mid 60's out of his as well. However, he was running a 24 pitch prop (mine is a 26). I do know that the open bows are generally a little slower due to more weight and less favorable aerodynamics. Also, the newer boats (not sure what year they started, maybe 2006 or so) are wood free and weigh about 400 lbs less. Also, the guys at Unlimited told me that they have had boats, including mine, that came from the factory in need of throttle adjustment. In other words, throttle down did not actually generate WOT. They said that mine was that way and would only run mid 60's before they adjusted it. Just a few things to consider..... But I am totally serious about the speed. It also sounds much better. Though, I don't really notice much difference below 60 mph. Above 60 the headers definitely help.
I spoke with a guy who had an early 2000's open bow heat and he said the same thing as Indy. He could only get mid 60's out of his as well. However, he was running a 24 pitch prop (mine is a 26). I do know that the open bows are generally a little slower due to more weight and less favorable aerodynamics. Also, the newer boats (not sure what year they started, maybe 2006 or so) are wood free and weigh about 400 lbs less. Also, the guys at Unlimited told me that they have had boats, including mine, that came from the factory in need of throttle adjustment. In other words, throttle down did not actually generate WOT. They said that mine was that way and would only run mid 60's before they adjusted it. Just a few things to consider..... But I am totally serious about the speed. It also sounds much better. Though, I don't really notice much difference below 60 mph. Above 60 the headers definitely help.
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06-02-2011, 11:37 AM
#14
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Here are a few, nevermind all the other junk around it in the garage. It is a 1990, I don't recall them calling it a heat then but it is 28 feet and very similar to today's heat. It would be nice to get some more speed out of it... was thinking risers/manifolds would be a start. Its spinning 25p mirages now around 4500 RPM. I think the twin's downfall is its weight, if I recall correctly we had it on a set of truck scales and it weighed out to around 8,000 lbs
It has 3 gas tanks, two sides and one middle. It holds 120 gal all together
Anyone ever seen one like this?
It has 3 gas tanks, two sides and one middle. It holds 120 gal all together
Anyone ever seen one like this?
06-02-2011, 02:26 PM
#15
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Ace,
That is too cool. A real piece of Nordic history.
Regarding performance, have you tried removing the whale tales and running it? You may have installed them to help planing or reduce porpoising, but they can reduce top end speed. Some Bravo 24" 4 blades might help. Some Danas would get your weight down and give you some exhaust relief. The stock cast iron exhaust manifolds (and you have 4) weigh a ton.
And, some additional horsepower never hurts
.........
Best Regards,
Steve
That is too cool. A real piece of Nordic history.
Regarding performance, have you tried removing the whale tales and running it? You may have installed them to help planing or reduce porpoising, but they can reduce top end speed. Some Bravo 24" 4 blades might help. Some Danas would get your weight down and give you some exhaust relief. The stock cast iron exhaust manifolds (and you have 4) weigh a ton.
And, some additional horsepower never hurts
.........Best Regards,
Steve
Last edited by Steve Zuckerman; 06-02-2011 at 02:32 PM.
06-02-2011, 04:47 PM
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Ace,
That is too cool. A real piece of Nordic history.
Regarding performance, have you tried removing the whale tales and running it? You may have installed them to help planing or reduce porpoising, but they can reduce top end speed. Some Bravo 24" 4 blades might help. Some Danas would get your weight down and give you some exhaust relief. The stock cast iron exhaust manifolds (and you have 4) weigh a ton.
And, some additional horsepower never hurts.........
Best Regards,
Steve
That is too cool. A real piece of Nordic history.
Regarding performance, have you tried removing the whale tales and running it? You may have installed them to help planing or reduce porpoising, but they can reduce top end speed. Some Bravo 24" 4 blades might help. Some Danas would get your weight down and give you some exhaust relief. The stock cast iron exhaust manifolds (and you have 4) weigh a ton.
And, some additional horsepower never hurts
.........Best Regards,
Steve
I'm trying to figure out if there is a rev limiter on these 454's I would guess it is 5,000-5,100? Doesn't it make more sense to spin the engine out to its redline with a smaller pitch prop? I'll have to check to make sure the butterfly is opening to its fullest, it would be pretty dumb if all it needed was a throttle adjustment all these years and its really a 70 mph boat everyday.
