Complete repowering of a brick
08-19-2015 | 02:17 PM
#221
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From: KY
I think I need a different prop, one that has more bite. My 24 were slipping bad and the 26 is worst. The more pitch the more slip. If I have a prop that had better bite I might be down to a 22 and more lift. Tuning props is not my strong suit by any means.
If I did go back to 24 I should over rev at WOT but would come out of the hole better.
If I did go back to 24 I should over rev at WOT but would come out of the hole better.
08-19-2015 | 02:29 PM
#224
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From: Ontario, Canada
I I have heard this for years but recently soda blasted all the bottom paint off my boat, sanded the hull perfectly then painted it with a 2 part epoxy teflon hull paint and gained 0.000 mph. There were no other changes except the hull paint and we confirmed there is no hook in the hull. I dont think there are enough true life examples to support the theory of bottom paint slowing you down. Maybe with a fat sail boat or a full cruiser but mine is a sporty day boat and the difference was zilch
08-19-2015 | 02:29 PM
#225
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From: Ontario, Canada
Knot what is the expected changes from adding cup? maybe thats what I need and I happen to be right next to the best prop shop in canada
08-19-2015 | 02:33 PM
#226
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From: Ontario, Canada
AllDodge, since our talk I pulled the trigger to work at getting mine dialed in a little better. I have some news, but I am still in the testing stages. I spoke with Chad Hill in regards to his Signature 4 x 4 wheels and decided to order a set. I bolted them on and put some hours on the boat this weekend, but the bay was snotty and couldn't get some WOT runs. I did get rid of the slip getting on plane, in fact its impressive getting on plane using the same pitch as i had with the Merc 4x3s. I also can get into aggressive turns like I use to with my B2 before the repower. The boats overall behavior was drastically improved also. I was running in a 3' chop and it let me be able to trim on top and stay steady without porpoising issues. I am working with Chad of what is the next step. He offers an exchange service in which I send these back and either tune them or send me another pair to get really dialed in. I almost feel with his wheels I can go up to 26 pitch which should give me a boost in speed and get me right where I want to be with still improving how it pushes on plane compared to the 4x3s I was running for a while.
I can keep you posted, but I would really consider this an option. Tell him Tom from Formula Owners of New Jersey directed you his way too.
Check out the full resto of It Don't Come Easy here..... http://www.formulaboatsforum.com/VBF...y-Formula-26PC
I can keep you posted, but I would really consider this an option. Tell him Tom from Formula Owners of New Jersey directed you his way too.
Check out the full resto of It Don't Come Easy here..... http://www.formulaboatsforum.com/VBF...y-Formula-26PC
08-19-2015 | 02:39 PM
#227
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From: KY
I would take you up on that to. Had a set of 22 cupped years ago and the older engine did better but still needed more, so I went to the 24. Only thing I didn't like about the cup is it is more difficult backing up, the props just don't bite. Had to raise the rpm about every time
08-19-2015 | 04:57 PM
#228
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From: Beaverton Or
Then chase the tail so to speak, i am sure BB blades would be more than capable of adding some cup along with some tweaking that would increase bite so to speak, keep one thing in mind you have a lot of blade in the water already 100 more Hp and increased torque and without a weight change your mph has stayed the same...Now if you were running 1000 hp on a 8000lb boat yes you probably could power thru almost any drag that is a fact.
08-20-2015 | 09:31 AM
#229
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From: Central IL
AD, have you verified the new mill is running on all 8 cylinders? Very hard to tell a miss with wet exhaust. I had a plug wire come off once and they only way I could tell something was wrong is that I was down RPM at WOT. That would mess with your slip numbers in the calculator.
