Blackhawk on a 21 Vector
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Blackhawk on a 21 Vector

  1. #1
    Bass Lake Dream'n "Flat" foot'n's Avatar
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    Default Blackhawk on a 21 Vector

    Has this ever been done?
    Does the Blackhawk pull from the hole?
    Skier, wakeboard, tubes, can it do the low speed stuff? Or is it all about speed?
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    Quote Originally Posted by "Flat" foot'n View Post
    Has this ever been done?
    Does the Blackhawk pull from the hole?
    Skier, wakeboard, tubes, can it do the low speed stuff? Or is it all about speed?
    my 22 Daytona was a dog getting out of the hole an was really sensitive to weight with the BH it cruzed pretty good at low speeds once up on plane I never pulled anything though but with full tanks an 5 people I could only run my 27p props an it took its time to role over sometimes I had to have one person off the back seat come up front an lean over the bow but its a bat outa hell at WOT

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    Bass Lake Dream'n "Flat" foot'n's Avatar
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    Thank Neil. I was considering the BH that is broken and for sale. Maybe the Vector would be too heavy for any low speed activity.
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    bor
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    Default BH out of the hole

    Quote Originally Posted by neil450 View Post
    my 22 Daytona was a dog getting out of the hole an was really sensitive to weight with the BH it cruzed pretty good at low speeds once up on plane I never pulled anything though but with full tanks an 5 people I could only run my 27p props an it took its time to role over sometimes I had to have one person off the back seat come up front an lean over the bow but its a bat outa hell at WOT
    I had one on my 21 ft whit 560 hp ls which will jump out of the hole whit those big props on it (29"s)
    the first time out the engine would nt turn them as the not map it under the 2500 properly after ajust that it would really jump on plane because of the 2 props bite in the water so if your engine is strong enough it will do just fine and @90 mph you can take youre hands of the wheel

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    Quote Originally Posted by "Flat" foot'n View Post
    Has this ever been done?
    Does the Blackhawk pull from the hole?
    Skier, wakeboard, tubes, can it do the low speed stuff? Or is it all about speed?
    I have never driven a Vector with the Black Hawk drive, but I have driven many Eliminator Daytona's with the Black Hawk. The Black Hawk was a dual counter rotating propeller surface drive that produced a massive amount of transom lift. The only Eliminator's it was offered on was the early 25 and 22 Daytona models. The first was the 22 and the first boat was built by Steve Donahue of Mercruiser Marine. He designed and modified the bottom by adding additional rocker to compensate for the transom lift. Some tried to add a standard Bravo drive with the modified bottom with poor results, the boat would porpoise badly. Next was the 25 Daytona and Steve was the first to own one and it too featured a modified bottom that Steve designed. His 25 Daytona also had the BlackTrak 2-speed transmission. The hull was lighter than the average and With a stock 502 package the boat would run in the low to mid 90's. Both models would labor getting on plane and produced a large roster tail when trimmed out. They would not be good for any type of water sport towing. The other thing I noticed was the low speed operation. As soon as I would put it in gear the thing would pull the transom down, the bow would rise and it would surge forward at a high rate of speed for just idling. It made it really hard when coming into the dock or putting the boat on the trailer. I would put it in gear to get it moving and then switch to neutral, otherwise I was coming in too fast. The other thing that felt strange was how it reacted at higher speeds. I was with Steve driving his boat at Elsinore to do some testing. It was a little windy and at high speeds the hull would start to move sideways when the wind was blowing against it and not just a little, but a lot; you could pick a point on the horizon and see you were moving sideways. There was just not enough skag in the water to keep it going straight. It should be pointed out that Eliminator built many early 25 Daytona's with both bottom designs and installed standard Bravo drives in both. The original bottom was better with the standard Bravo drive if a lot of power was used , something to get the boat close to 100 mph. The bottom had a tendency to porpoise around 80 mph and you needed enough power to drive through it. The modified bottom worked better with stock power, like the standard 502, and had a better cruiser speed. The modified bottom was about 5 to 10 mph faster in the mid-range with the same engine package, same rpm, same gear ratio and same propeller. The rocker actually allowed the hull to plan at a lower speed and free-up faster, the standard bottom was more glued-in until it reached higher speeds.

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    Quote Originally Posted by bor View Post
    I had one on my 21 ft whit 560 hp ls which will jump out of the hole whit those big props on it (29"s)
    the first time out the engine would nt turn them as the not map it under the 2500 properly after ajust that it would really jump on plane because of the 2 props bite in the water so if your engine is strong enough it will do just fine and @90 mph you can take youre hands of the wheel
    I had a 509 bbc efi in my 95 22 Daytona that dyno 560hp an 630ft it was mapped by whipple I had 27 29 31 props I could 27s an it would get out of the water quick if I was light on weight or I would run a 27 front an 29 rear so it would get on plane faster an pick it up some on the top end or 29 front 31 rear but with 5 people a full tanks on a heat soaked day it will struggle no matter what I did would never get it to push over 2000 rpm coming out of the hole not enough prop slip I have seen some BH with airators fabed into them

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    Itsmeagain, I remember talking to Steve back in 96', I wanted to do a 21 Daytona with a 350mpi and BH. Never panned out, couldn't come up with the $$$$.
    The vector you drove with it, how did it run? Any bottom mods? Horsepower?
    I have an 88' vector, true v bottom with stock 454, 330hp power. In the next few years I'll be dropping a 540 in it and tuning the bottom.
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    Quote Originally Posted by "Flat" foot'n View Post
    Itsmeagain, I remember talking to Steve back in 96', I wanted to do a 21 Daytona with a 350mpi and BH. Never panned out, couldn't come up with the $$$$.The vector you drove with it, how did it run? Any bottom mods? Horsepower? I have an 88' vector, true v bottom with stock 454, 330hp power. In the next few years I'll be dropping a 540 in it and tuning the bottom.
    Did not drive as many Vector's as I did Daytona's but did drive a few and rigged a lot of them, mostly all Mercruiser packages and 2 with Jets. In fact I may have rigged your boat as I worked there back in '87 and '88, I left in late '88 and went to Eliminator. The Vector was one of my favorite Hallett's, they always road and handled great. There were 2 different bottoms for the Vector. The biggest difference was the transom angle, first bottom had a lot of transom angle, something like 17/18 degrees; most hulls have 12/15. The step transom angle made the front of the engine sit rather high. I believe there was a small change in the bottom on the second bottom. I had 3 Hallett 20' closed deck V-drives and 3 Hallett 20 open bow with jets, so you can see I was somewhat partial to the brand even before I started working for them. Wanted to do a Victor but switched companies and built an Eliminator 234 instead. I used the 234 once and sold it, should have done the Vector! The pictures are from the '88 brochure and I'm driving.
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  11. #9
    gn7
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    Quote Originally Posted by "Flat" foot'n View Post
    Itsmeagain, I remember talking to Steve back in 96', I wanted to do a 21 Daytona with a 350mpi and BH. Never panned out, couldn't come up with the $$$$.
    The vector you drove with it, how did it run? Any bottom mods? Horsepower?
    I have an 88' vector, true v bottom with stock 454, 330hp power. In the next few years I'll be dropping a 540 in it and tuning the bottom.
    You see a common theme running through all those posts?
    Did someone actually say they had driven a Vector with a BH?
    Anybody driven ANY V bottom with a BH?
    Anybody know why Merc stopped selling the BH, and probably would perfer not to continue selling parts for them, if they even still are?



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    Quote Originally Posted by gn7 View Post
    You see a common theme running through all those posts?
    Did someone actually say they had driven a Vector with a BH?
    Anybody driven ANY V bottom with a BH?
    Anybody know why Merc stopped selling the BH, and probably would perfer not to continue selling parts for them, if they even still are?
    My 25 daytona has a BH with 29 props. Stock 502 mpi, it takes a few sec to plane but once up it runs 60mph @ 3600rpms cruising, and will run upper 70's wfo. Not to bad for a for the load I carry and the power it has.
    I personally like the BlackHawk. My understanding was the economic crunch of the time is why they stopped making them. Just wasnt a good economic decision to continue making such an application specific unit.
    Last edited by Hass828; 07-03-2013 at 06:31 AM.
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