Did you try calling Eliminator to see if they had any old sets still left over. They were the test bed for that drive when I bought my Daytona from them with a blackhawk drive. There were only 3 sets available 27, 29 or 31 pitch. The 29" were best for overall boating. You might also give Bronson Hill props a call in Santa Ana to see if they have any connections.
There is a thread on www.screamandfly.com on blackhawk drives and there is a guy who will still make props for the drive! They were also saying there are a few shops using bravo I HD top ends and a bravoIII lower and makes them pretty strong I guess! I believe the topic was in the classifieds?
yeah i have talked to eliminator i was down ther a few weeks ago an bob leach showed a few sets but he realy wont part with any of the he still has a few brand new BH in the box an puts them on some of the 27 daytonas he was on ther now 128 mph with a 900
I had Bob's own custom built 22 Daytona. It was white with 3 colored stripes and had a custom tandem trailer. It had cool billet wheels that matched the steering wheel on the boat/ Bob had like a 1000hp motor in it but I had it swapped out for a 502. This was the second Blackhawk drive boat they did and a rep from mercury helped dial it in. I ended up using the 29" props and was running 90mph. I got 95mph with the 31" props and light load. What was best about the setup was that it was on a stock 415hp motor and it was so fuel efficient. I could go almost a full 3 days without putting gas in the boat. That drive only had 60 pounds of drag in the water and the counter rotating props kept the boat running perfectly straight with no additional steering (no torque). It was a dog getting out of the hole though. I used to have my brother lay acrosss the deck out front to get it to roll over.
yeah i saw 90 mostly high 80s when it was 415hp it now has 560 so i will try an get 31 they say i should have problom getting 100mph or more bronson hill an extrem custom marine said that we can mix up props 27 with 31
How about your idle speed also? I bet that boat moves along pretty well at idle in the no wake zone. I used to get stopped alot for going to fast in the no wake zone but it was just those twin props moving the boat forward at a good clip even though it was idling. I did not know you could mix the props. I am sure you will hit 100 with that much hp now and still have gret mid range and cruise efficiency as well. I really liked my 22 with that drive on it. My boat name back in the day (when I was single of course) was "Furr Trap"...
yeah the idle speed is something you have to get used to i have had the boat for some years i put a mefi 4 in with the new motor an the maping was all screwed off so as soon as you went to gear it would idle 700 then run up to 1000 in gear an dam that thing would book thru the no wake so i just bumbed it in an out of gear for the week end an that did last long be for i had no nuetral so the boat is being fixed an re maped an i have decided to keep it since ther on of a kind so i just want to get props for i only have 27s
I actually think it had to bump up to 1000. It was just compensating for having to spin both those big props and keep from stalling. If I remember right, my 502 used to bump up to around 900rpm when I put it in gear. It would almost stall and then bump up over the normal idle of around 600rpm. Hopefully you can find some bigger props either the 29 or 31.
My first time on the water with mine, I was just leaving the dock space at the springs with a boat load of people. As I was trying to manuever out of the dock, the drive stuck in forward gear and would not go into neutral. All I could do was shut the motor off and brace for impact. Sponsons went right through the side of one of those old style Advantage party cats just above the water line or the boat would have sunk. No damage to my boat. Mercury paid for all the damage to the other guys boat.
yeah you are right it will dive down the rpm to like 500 then back up to 900 or 1000 then it sets back to 650 700 mine now will pull into neutral then it graps back in to forward my buddy broke the pasnger seat pulling in to a spot in the channel i pulled it into neutral he stood up to jump out an make sure we land strait then it smacked in forward he went over the front seat an broke the screws out of the bottom it sucked but was funny to then i had to try an put it back on the trailer like that at prime time at site six i got lucky put it on like a clove an was off the ramp
Personally, I think you will have the perfect set up when you get it done. Not to much HP so your motor and drive will be reliable and you will have a 100mph boat for sure. Those blackhawks were made for the 22 Daytona. They actually add a notch to the bottom just for that drive install. You will also get great fuel efficiency with that drive.
yeah i found out the hard way that the 22 daytona bh was made for the BH i bought a imco brovo for it then bob leach said i could not do that so luckly i was able to sell the brovo for what i bought it for