7015/3 prop on Blackjack 55?
10-10-2008, 06:16 PM
#51
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RE: 7015/3 prop on Blackjack 55?
another cheap little upgrade you can do is remove the head gasket to lower the squish and add a little compression. i put one of carlos's .002" soft copper gaskets in. i know some people that take it out and just use ultra copper rtv to seal it. i use the soft copper because i don't have a torque wrench and am afraid it will leak. i'm not sure what kind of gain it gives because i changed it before i had my gps.
10-10-2008, 07:22 PM
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RE: 7015/3 prop on Blackjack 55?
Yup, I can't see why it would have to be so high out of the water, but everyone kept saying it had to be raised to get it to work, so I figured what the hell and raised it 
. No harm in trying, but I knew it wasn't a height issue- it just did not want to pull that prop. I could actually see the boat slowing down the higher I raised it, but the motor was picking up RPM, so it just couldn't spin it with a load on it. I just don't think the hull is very good for going fast. I think the boat itself has too much drag in the water... It can do it, but the same power levels would make a better hull much faster.
I hope the 472 is a better match for this boat, I'm sure it will be though.
. No harm in trying, but I knew it wasn't a height issue- it just did not want to pull that prop. I could actually see the boat slowing down the higher I raised it, but the motor was picking up RPM, so it just couldn't spin it with a load on it. I just don't think the hull is very good for going fast. I think the boat itself has too much drag in the water... It can do it, but the same power levels would make a better hull much faster. I hope the 472 is a better match for this boat, I'm sure it will be though.
10-10-2008, 07:46 PM
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RE: 7015/3 prop on Blackjack 55?
ORIGINAL: kwiktsi
I think the boat itself has too much drag in the water... It can do it, but the same power levels would make a better hull much faster.
I hope the 472 is a better match for this boat, I'm sure it will be though.
I think the boat itself has too much drag in the water... It can do it, but the same power levels would make a better hull much faster.
I hope the 472 is a better match for this boat, I'm sure it will be though.
11-12-2008, 07:35 PM
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RE: 7015/3 prop on Blackjack 55?
I work on rc boats and a friend on mine has a blackjack 55 he gave it to me and said do what ever I can to make the boat run faster and not flip all the time he is tired of going out and getting it all the time
so I took out clutch water pump and lowered the stuffing tube so the bottom of the strut is level with the bottom of the boat put on a 275 prather stainless steel with a texas cut . the two back motor mount
bolt slots had to be sloted a little more to line up the flex cable installed a collet on the motor and made it a direct drive got 42.9 GPS top speed but the handling was great we even ran ovel track
wide open If you would like to see go to youtube type in 42 mph blackjack 55
byyouboyz rc boats
so I took out clutch water pump and lowered the stuffing tube so the bottom of the strut is level with the bottom of the boat put on a 275 prather stainless steel with a texas cut . the two back motor mount
bolt slots had to be sloted a little more to line up the flex cable installed a collet on the motor and made it a direct drive got 42.9 GPS top speed but the handling was great we even ran ovel track
wide open If you would like to see go to youtube type in 42 mph blackjack 55
byyouboyz rc boats
11-12-2008, 10:26 PM
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RE: 7015/3 prop on Blackjack 55?
I'm getting 40 mph out of mine with an ABC 2714/3 polished and balanced. I did have to adjust the strut down from max up in order to be able to drive it. First time out it would have likely gone over 40 but the boat never touched the water and eventually did a barrel roll.
I'm finding that the engine sounds more loaded then it did with the stock prop. Next up more HP, turbine or modded Zenoah? Hmm....
I'm finding that the engine sounds more loaded then it did with the stock prop. Next up more HP, turbine or modded Zenoah? Hmm....
11-12-2008, 10:38 PM
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RE: 7015/3 prop on Blackjack 55?
ORIGINAL: towmissel
I work on rc boats and a friend on mine has a blackjack 55 he gave it to me and said do what ever I can to make the boat run faster and not flip all the time he is tired of going out and getting it all the time
so I took out clutch water pump and lowered the stuffing tube so the bottom of the strut is level with the bottom of the boat put on a 275 prather stainless steel with a texas cut . the two back motor mount
bolt slots had to be sloted a little more to line up the flex cable installed a collet on the motor and made it a direct drive got 42.9 GPS top speed but the handling was great we even ran ovel track
wide open If you would like to see go to youtube type in 42 mph blackjack 55
byyouboyz rc boats
I work on rc boats and a friend on mine has a blackjack 55 he gave it to me and said do what ever I can to make the boat run faster and not flip all the time he is tired of going out and getting it all the time
so I took out clutch water pump and lowered the stuffing tube so the bottom of the strut is level with the bottom of the boat put on a 275 prather stainless steel with a texas cut . the two back motor mount
bolt slots had to be sloted a little more to line up the flex cable installed a collet on the motor and made it a direct drive got 42.9 GPS top speed but the handling was great we even ran ovel track
wide open If you would like to see go to youtube type in 42 mph blackjack 55
byyouboyz rc boats
