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41 Falcon cat build

Old 06-16-2009, 10:26 PM
  #301  
painman
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Default RE: 41 Falcon cat build



GREAT; now I have two boats running over 70mph, sure hope I can get this boat to the mid 60"s and will be happy camper. It is good to know that the boat is capable of running those speeds. Thanks again Les and Paul for your help. if I come across any more problems, I know where to get the answers.

Thanks Again to you both;

Randy

Old 06-17-2009, 08:51 AM
  #302  
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Default RE: 41 Falcon cat build

Les, I'm glad you mentioned the balsa disrupter you are using between the sponsons. I am doing the same thing with tire weights. I took a 3 oz strip if the weights used to balance tires and stuck it between the sponsons (about 75% the length of the distance between the sponsons is good). Really helps the boat calm down. With the stick on weights you disrupt the air as well as shift your CG forward.

The next thing I am going to try is putting a little more weight in the bow and neutral the strut. I think it will speed her up some. May send the prop to Chris for some additional cup as well, but will do these things in steps.

I think this boat is capable of 75 mph with a QD and some tweaking. I just know it won't take a crash especially a stuff at that speed.
Old 06-17-2009, 10:23 PM
  #303  
painman
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Default RE: 41 Falcon cat build

Les, I have a question, just wondering what header you are using that allows you to run the cowl without having to cut. I like the looks of the cowl. I had a 105 degree on,but would not allow the cowl to fit. I have now installed a WTC, seems like I nowhave a power loss. Not 100% sure; If you could post pic's that would be great.

Thanks for your time.

Randy

Old 06-21-2009, 07:55 PM
  #304  
Paul M
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Default RE: 41 Falcon cat build



As far as I know, QD is the only engine pipe combo where you will not lose power with a WTC configuration.

Have you thought about a 106, cutting the hole and then reglassing repainting the cowl?

Old 06-22-2009, 03:12 AM
  #305  
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Default RE: 41 Falcon cat build

You can get single piece wrap to centre pipes for Zens that don't rob power. I have one on my whiplash. I've personally hit 73mph with it.
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Old 06-22-2009, 06:55 AM
  #306  
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Default RE: 41 Falcon cat build

What header are you running Dicko? I have never seen one with all the welds.

Thanks Randy
Old 06-22-2009, 05:54 PM
  #307  
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Default RE: 41 Falcon cat build

That's some serious truckin, dicko. What is the source of the pipe? It would solve alot of issues. Have you run the whip with a 90 * pipe for comparison?

Aren't they supposed to be a 80 mph + boat?

Not bustin chops, just askin'
Old 06-22-2009, 05:57 PM
  #308  
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Default RE: 41 Falcon cat build


ORIGINAL: painman

What header are you running Dicko? I have never seen one with all the welds.

Thanks Randy
Its an all in one pipe,you can also try the china ones they work pretty good.
Mart
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Old 06-22-2009, 07:20 PM
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Default RE: 41 Falcon cat build



I think the guy that built the boat also made the pipe.  He modded the engine as well.  He recently got out of racing & sold his whole fleet.  I've only run the boat a handful of times, but the guy before me had it up to 79 mph or more.  80 mph is definitely doable, but on an oval course you first have to finish before you can finish first.  80 mph in a straigh line no probs, but as soon as you want to hook that 1st turn you'll lose that speed.  it's not all about the fastest boat.

I haven't tried a 90* on the whip for comparison either.

Old 06-27-2009, 07:34 AM
  #310  
painman
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Default RE: 41 Falcon cat build

Have a Queston on the prop? I got the 2716 15* prop and after working the prop BS my cat seems to take to long to get to speed? I feel like this is to much for the M5 that I now have in the boat. I am currently running an old 275 that Andy worked on years ago with the rounded tips. Seems to like the prop really well, should I round the tips on the 2716?

Thanks
Old 06-27-2009, 07:55 AM
  #311  
Paul M
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Default RE: 41 Falcon cat build

Think of a higher pitched prop as a higher gear. If you want a higher top speed you will have to have a higher gear. If you have ever rode a bicycle and tried to start off in 3rd or 4th gear, it's really hard to get started but once you do you are going faster than if you stayed in 1st. The engine takes longer to spool up but in the end the boat will top out faster (if the engine can hit top RPM) with the higher pitched prop.

My Falcon was over 3 mph faster (68 vs 71) with the round tip 2716 versus the sharp tip.

Are you running a Hot pipe or an aluminum band pipe? I have found the steel pipes make significantly more power than the aluminum band pipes for my purposes. I like the Hot pipe becasue even though it is steel it really is no heavier than the aluminum ones.
Old 06-27-2009, 08:18 AM
  #312  
painman
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Default RE: 41 Falcon cat build

Headed to river with jet skis and then home and prop heads to the grinder, for rounded tips. Need to remove some of the roating mass;
Thanks Paul for the info.

Randy [sm=shades_smile.gif]
Old 08-17-2010, 07:19 PM
  #313  
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Default RE: 41 Falcon cat build

...some more great info, cheers.

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