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Davey

  • Karma: +0/-0
HULL DIFFERENCES?
« on: March 28, 2013, 01:49:05 PM »
Hello everyone. I had my pump worked on last summer and the guy at the pump shop was saying that eliminators are good hulls but tahitis are hard to make go fast. It seems to me that 2 hulls of the same size and weight would go the same speed and acceleration, all other things being equal of course. I'm curious what the differences are between hulls and what makes one more of a quality hull than another. Can someone please shed some light on this for me? And i'm talking about semi v hulls, not tunnel hulls. Thank you.
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ka0tyk

  • Karma: +30/-0
Re: HULL DIFFERENCES?
« Reply #1 on: March 28, 2013, 02:27:23 PM »
you can throw craploads of power into anything and make it go fast.  but it'll be the difference between a nice ride, and a temper tantrum redheaded stepchild where you fear for your life everytime you press the go pedal.  think of it like dropping 1000hp into a kia, and 1000hp into a corvette.  they'll both go fast...
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Davey

  • Karma: +0/-0
Re: HULL DIFFERENCES?
« Reply #2 on: March 28, 2013, 08:19:19 PM »
Someone was telling me about full stringers vs quarter stringers and also mentioned hand laid fiberglass vs chopper gun. Those are the only differences that I know of. Do they chopper gun the entire hull or just the stringers? Are full stringers better because they can support more power before the engine rips out of the boat or is it another reason? Are there any other differences between the hulls and will 2 boats of the same size and weight with the same power and pump go the same speed, for example an eliminator and a tahiti? Sorry for all of the questions but i'm shopping for a boat right now and i'd hate to buy one just to figure out that wasn't the one I wanted.
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GlassCutter

  • Karma: +31/-0
Re: HULL DIFFERENCES?
« Reply #3 on: March 28, 2013, 10:07:51 PM »
The way the fiberglass was done and full vs. quarter stringer questions both kind of go to the same thing.  That is making the hull strong and rigid at a reasonable cost.  Hand laid vs. chopper gun?  Either method will build a strong long lasting hull.  Or not.  Same with the stringers.  If properly designed and more importantly, if properly maintained for decades,  any of these methods are acceptable.   I have two boats that are both quarter stringer designs.  The Spectra 20 is laid up like a tank.  Cuts through terrible chop with ease. I've seen people run twice the horsepower I do and have no problems.
Stick with a premier name and do a little homework here.  IMHO the quality of the rigging, and the quality of the maintainance down through the years, is what will determine how much quality you are buying at this point.  If no one has broken the hull in 40 years you probably won't either.
  • Boat #1: 1973  Wriedt Montara 23
  • Boat #2: 1978 Spectra 20 460/Berkley
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Also, I will kiss bare male ass in the middle of the Vegas Strip  . . .  I will post pics if I need to.  --  IRRebel 2013

"Go ahead Rivertard does it.  Take a video though."

"If you did it in a dodge it would have shifted perfectly ran a thousand miles per hour and got optimum fuel mileage!"  Nordie  2012

Davey

  • Karma: +0/-0
Re: HULL DIFFERENCES?
« Reply #4 on: March 28, 2013, 11:09:37 PM »
So you are saying that the way that the hull is built has to do with durability, not performance, is this correct?
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GlassCutter

  • Karma: +31/-0
Re: HULL DIFFERENCES?
« Reply #5 on: March 29, 2013, 06:54:55 AM »
When you are discussing lay up techniques and stringer lengths, then yes, those things will have much more effect on strength/durability than on handling or performance.
  • Boat #1: 1973  Wriedt Montara 23
  • Boat #2: 1978 Spectra 20 460/Berkley
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Also, I will kiss bare male ass in the middle of the Vegas Strip  . . .  I will post pics if I need to.  --  IRRebel 2013

"Go ahead Rivertard does it.  Take a video though."

"If you did it in a dodge it would have shifted perfectly ran a thousand miles per hour and got optimum fuel mileage!"  Nordie  2012

crewchief22

  • Karma: +66/-0
Re: HULL DIFFERENCES?
« Reply #6 on: March 29, 2013, 06:58:26 AM »
The speed of a boat is affected largely by the design and shape of the bottom of the boat.  It sounds like you are assuming that all shallow v-bottom boats have the same design with the exception of the tunnel hulls, this is far from true.  A hull with a deep outer chine (gullwing being the extreem) can help pack air under the boat creating lift (lift is good to help a boat go fast).  A hull with a basic V shape and a deep entry will be more comfortable at slower speeds but may not be safe going fast.  Then you get into the issues caused by "hook" or "rocker" that gets more in depth than I want to get into at this time (look it up).

 

  • Boat #1: '77 Hondo Pantera GT Jet
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"Racing is life!  Anything that happens before or after, is just waiting"    Steve McQueen

The problem with America is stupidity. I'm not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself?

Davey

  • Karma: +0/-0
Re: HULL DIFFERENCES?
« Reply #7 on: March 29, 2013, 11:26:34 AM »
thank you all very much for the replies. that was very informative crewchief22. is there a book i can read to learn about hull design? theres got to be some way that the original designers learned all of this stuff. thank you.
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Horizonjet

  • Karma: +0/-0
Re: HULL DIFFERENCES?
« Reply #8 on: March 29, 2013, 12:01:10 PM »
Not being a smartass but try Google. I did not see nothing in library or Amazon about any books on the subject. My son was going to do a research paper on this subject for school and didn't find much out there but except for Google .
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72 Horizon BBC

got the squirts

  • Karma: +1/-0
Re: HULL DIFFERENCES?
« Reply #9 on: March 30, 2013, 08:43:17 AM »
Hi everyone I have a question why we are on the subject has anyone come across an eliminator tunnel hull without the pickle fork front end
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76 Bonneville

  • Karma: +25/-0
Re: HULL DIFFERENCES?
« Reply #10 on: March 30, 2013, 11:25:01 AM »
Hi everyone I have a question why we are on the subject has anyone come across an eliminator tunnel hull without the pickle fork front end
They don't come up very often. Eliminator use that tunnel in their bass boat in the same time period your 20' was built.
Post up some pics of yours, including the transom so we can see the tunnels.
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got the squirts

  • Karma: +1/-0
Re: HULL DIFFERENCES?
« Reply #11 on: March 30, 2013, 12:15:51 PM »
Here you go
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SuperJet

  • Karma: +2/-0
Re: HULL DIFFERENCES?
« Reply #12 on: March 30, 2013, 02:37:32 PM »
Looks more like a stoker mod v bottom. Should be a good running hull
  • Boat #1: 1978 Sanger SuperJet
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Mine was stiff when working it back and forth on the trailer.
Once I got it on the water and under power, it was amazing!

got the squirts

  • Karma: +1/-0
Re: HULL DIFFERENCES?
« Reply #13 on: March 30, 2013, 02:50:44 PM »
It runs real smooth and runs fast the family friend we bought it from owned a boat shop called pro boat in california he purchased the hull mold and did it himself was a closed bow but opened it up had a 502 with nitrous
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Davey

  • Karma: +0/-0
Re: HULL DIFFERENCES?
« Reply #14 on: March 31, 2013, 01:24:30 PM »
Ok. I've found a hull. The newer v-drive hulls they make with a balsa core to make them lighter. When I restring the boat can I change it to a balsa core? Is there anything that can't be refurbished on a hull that I need to look out for? Thank you again.
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crewchief22

  • Karma: +66/-0
Re: HULL DIFFERENCES?
« Reply #15 on: March 31, 2013, 01:51:37 PM »
With the large number of good boats for sale with and without engines there is no reason to mess with something that will need the stringers replaced. 

If you're looking for something on a budget, you can find good hulls that will need paint or upholstery.  That way you don't chance causing problems by changing the stringers.
  • Boat #1: '77 Hondo Pantera GT Jet
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"Racing is life!  Anything that happens before or after, is just waiting"    Steve McQueen

The problem with America is stupidity. I'm not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself?

jet fever

  • Karma: +7/-2
Re: HULL DIFFERENCES?
« Reply #16 on: March 31, 2013, 09:10:56 PM »
 :thumbup:

X2 of what crewchief said
  • Boat #1: 76 Hallett Bubble Deck
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