RE: Carb vs. venturi & exhaust throttle
thanks guy's, much appreciated!
Posted on: 11/25/2011 6:54 AM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=10828200

RE: Carb vs. venturi & exhaust throttle
Can I use the carb from my K&B 7.5 OB on this Inboard 6.5?
Posted on: 11/24/2011 4:56 AM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=10826767

RE: Carb vs. venturi & exhaust throttle
Thanks, that’s why I got the 40" Deep V for FUN running. I have 2 tunnels for racing (K&B 3.5 & 7.5) and the lake I practice on is way to choppy and busy so I keep crashing. I wanted something that could handle a bit of chop and still do 40 to 50mph. (hard to get away from speed when you run tunnels! Ps. tell Gerry I fixed his "Sea Hawk" and ran it with both 24" and 28" sponsons... wicked... Can I use the carb from my K&B 7.5 OB on this Inboard 6.5?
Posted on: 11/21/2011 12:33 PM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=10822580

RE: Carb vs. venturi & exhaust throttle
Thanks for the info, I will try it as is. But your saying I could simply switch it over to a carb arrangement, correct? if so, can I just throw on a PERRY CARBURETOR for K&B 6.5/7.5CC for example? any suggestions on a carb? or should I forget about it and get a new engine? in other words, is it worth messing around with an antique motor? Thanks, Pete
Posted on: 11/21/2011 3:49 AM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=10821988

Carb vs. venturi & exhaust throttle
Hi, Just got a v-hull with an old K&B 6.5 / .40 with a venturi and throttle exaust. Wondering what the pros and cons are versus a carb. I've never had this type of arrangement. I need some educating here, Anyone? Thanks. Pete
Posted on: 11/20/2011 6:33 PM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=10821466

RE: K&B 3.5 what prop???
<![if gte mso 9]> Normal 0 false false false MicrosoftInternetExplorer4 <![endif]><![if gte mso 9]> <![endif]><![if gte mso 10]><![endif]> JD, I have 5 sets of sponsons both 24” and 28” and yes some are not flat. I’m attempting to drill tiny spaced out holes in them and fill them with construction foam in a can so it fills the hollows and makes them sturdier but not heavier. I managed to fiberglass and rubberize the center piece, fix the sponsons, use the VS1 fuel tank and still manage to keep it under 5lbs (4lbs 2oz without fuel). I’m trying it out tomorrow for the first time, I will keep you up-dated. Pete
Posted on: 10/29/2010 11:46 AM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=10102264

RE: K&B 3.5 what prop???
Only you would know that! Thanks. Its going on your baby the SEAHAWK!!! I'm almost done rebuilding it and cant wait to let her rip!
Posted on: 10/28/2010 11:09 AM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=10099910

K&B 3.5 what prop???
I bought a old K&B 3.5 with a modifyed tune pipe and i'm trying to identify the prop, it is 2 blade and has JG and E20 stamped on the sides. Anyone know what type of prop this is?
Posted on: 10/27/2010 6:57 PM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=10098470

RE: prop sugestion help? for K&B 7.5 outboard
Wow, thats quite decent considering the weight of theses boats! I will try one.
Posted on: 10/21/2010 3:13 PM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=10084149

RE: prop sugestion help? for K&B 7.5 outboard
Great, so if my boat is heavier I'm most likley better to use a 3 blade prop and if lighter a 2 blade. Great info, Thanks
Posted on: 10/15/2010 11:32 AM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=10070268

RE: prop sugestion help? for K&B 7.5 outboard
<![if gte mso 9]> Normal 0 false false false MicrosoftInternetExplorer4 <![endif]><![if gte mso 9]> <![endif]><![if gte mso 10]><![endif]> Ron, Thanks for the info. Which one did you prefer? Also; why 2 blade or 3 blade? in the old days on actual size boats we used 3 blade for more torque and 2 blade for more speed, does this apply for RC boats?
Posted on: 10/15/2010 9:15 AM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=10070018

RE: prop sugestion help? for K&B 7.5 outboard
Thanks All, I think I will try the X447 (conservative) to start and try the P230 to see the difference.
Posted on: 10/14/2010 10:20 PM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=10069417

prop sugestion help? for K&B 7.5 outboard
<![if gte mso 9]> Normal 0 false false false MicrosoftInternetExplorer4 <![endif]><![if gte mso 9]> <![endif]><![if gte mso 10]><![endif]> I have a 7.5 K&B on an old 35" Dumas Hot Shot (I think?) tunnel hull. Who is the prop expert that can tell me what I should use on this? If you can give me different styles and makes with part numbers and descriptions that would be great since my hobby shop knows nothing about boats and has a great big box with all sorts of mixed up parts in it and I have to guess what’s what. Thanks!
Posted on: 10/14/2010 4:31 PM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=10068743

RE: Adjusting prop height on tunnel hulls
Great, thanks.
Posted on: 8/21/2010 7:03 PM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9950369

Adjusting prop height on tunnel hulls
Jerry, on your old "Hawk Signature Series" What height should I adjust my PROP center line with the bottom of the hull? I used to own a real shovel nose and the center line of the prop used to be in-line with the bottom of the boat so half the prop would spin in air and the other half in the water. I have never done it on a tunnel hull and there is air between the sponsons!?!?! Please let me know your thoughts, Thanks, Pete
Posted on: 8/21/2010 6:04 PM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9950256

RE: 24
Jerry, on your old "Hawk Signature Series" What height should I adjust my PROP center line with the bottom of the hull? I used to own a real shovel nose and the center line of the prop used to be in-line with the bottom of the boat so half the prop would spin in air and the other half in the water. I have never done it on a tunnel hull and there is air between the sponsons!?!?! Please let me know your thoughts, Thanks, Pete
Posted on: 8/16/2010 7:59 AM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9936800

RE: 24
Hey Jerry, do you think it will be to much weight if I put a single layer of fiberglass over the center piece? thanks, Pete
Posted on: 8/4/2010 4:02 PM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9910921

24" Tunnel Hull with K&B 3.5
<meta content="text/html; charset=utf-8" http-equiv="Content-Type" /><meta content="Word.Document" name="ProgId" /><meta content="Microsoft Word 11" name="Generator" /><meta content="Microsoft Word 11" name="Originator" /><link href="file:///C:\DOCUME~1\Pete\LOCALS~1\Temp\msohtml1\01\clip_filelist.xml" rel="File-List" /><![if gte mso 9]> Normal 0 false false false MicrosoftInternetExplorer4 <![endif]><![if gte mso 9]> <![endif]><![if gte mso 10]><![endif]> Anyone know what the average weight (without fuel) should be for a 24" t-hull with a 3.5 K&B? I'm redoing on of JD's old design "Hawk Signature Series" and I'm thinking of covering the wood center piece with fiberglass.
Posted on: 8/4/2010 8:50 AM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9910083

RE: K&B 3.5 engine
Great info, I'm setting it up as we speek. Thank you very much. Regards, pete
Posted on: 8/3/2010 12:26 PM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9908110

RE: K&B 3.5 engine
That a great starting point. Thanks very much> Pete
Posted on: 8/2/2010 10:43 PM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9906946

RE: K&B 3.5 engine
How about the size of the inside diameter of the tune pipe outlet, any idea what it should be?
Posted on: 8/1/2010 11:27 PM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9904475

RE: K&B 3.5 engine
Is one better than the other?
Posted on: 8/1/2010 5:54 PM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9903770

RE: K&B 3.5 engine
<meta content="text/html; charset=utf-8" http-equiv="Content-Type" /><meta content="Word.Document" name="ProgId" /><meta content="Microsoft Word 11" name="Generator" /><meta content="Microsoft Word 11" name="Originator" /><link href="file:///C:\DOCUME~1\Pete\LOCALS~1\Temp\msohtml1\01\clip_filelist.xml" rel="File-List" /><![if gte mso 9]> Normal 0 false false false MicrosoftInternetExplorer4 <![endif]><![if gte mso 9]> <![endif]><![if gte mso 10]><![endif]> Ron, Thanks for the reply, If you look closely you will see a brass nipple on the header (for tank pressure I assume) and if you look at the pic showing the motor mount that you hated so much (thanks, I will buy the du-bro!) above on the engine block there is an aluminum nipple like the brass ones. Which one should I use and what do I do with the one I'm not going to use? Thanks, Pete
Posted on: 8/1/2010 4:33 PM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9903616

RE: K&B 3.5 engine
Click to see fullsize image. Click for fullsize Click to see fullsize image. Click for fullsize Click to see fullsize image.
Posted on: 8/1/2010 1:42 PM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9903289

RE: K&B 3.5 engine
What do I do if I have both? plug one up? if so how? Thanks, Pete
Posted on: 8/1/2010 1:41 PM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9903288

RE: K&B 3.5 engine
I knew you would ask for pics, this is my first time uploading pics, hope this works. Rgds, Pete Also, in the middle pic notice a corner broke off on the mounting plate, anybody know where I can find a new plate? Thanks.
Posted on: 8/1/2010 1:35 PM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9903173

K&B 3.5 engine
Hi all, I have a K&B 3.5 engine modified with tune pipe, it looks like I'm missing the tail piece. The large part of the exaust is 4.25" long (fron U elbow) and the outlet is 3/8" (10mm) ID. Anyonw know what the outlet size for a 3.5 should be? Also there is a conection in the engine block (looks like and is the same size as the water cool conections on the head) and I have a conection on the muffler (for the gas tank I guess) anybody know what the conection on the block is for? Any help would be greatly appriciated, Thanks, Pete
Posted on: 8/1/2010 12:01 PM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9903127

RE: Dunlap Signature Series 3.5 Tunnel
<meta content="text/html; charset=utf-8" http-equiv="Content-Type" /><meta content="Word.Document" name="ProgId" /><meta content="Microsoft Word 11" name="Generator" /><meta content="Microsoft Word 11" name="Originator" /><link href="file:///C:\DOCUME~1\Pete\LOCALS~1\Temp\msohtml1\01\clip_filelist.xml" rel="File-List" /><![if gte mso 9]> Normal 0 false false false MicrosoftInternetExplorer4 <![endif]><![if gte mso 9]> <![endif]><![if gte mso 10]><![endif]> Jerry, thanks for the reply, I'm pretty much a beginner when it comes to RC boats but have been boating all my life 45+ years and even had a 7.5 foot shovel head tri point with a Merc Mark 16 that did 50+ MPH (scary but fun!). I have your old Hawk series and want to fix it up for fun (I don't plan on racing it) it has a KB 3.5 with tune pipe and I need the radio system and servos for it. What would you suggest I get for it if I will be doing only amateur boating for fun? Pete
Posted on: 7/19/2010 11:49 AM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9874092

Dunlap Signature Series 3.5 Tunnel
Anyone know about this boat? "Sea Hawk"
Posted on: 7/13/2010 9:27 PM by Author "neverthought" in the forum "Speed - RC Nitro Boats"
http://www.rcuniverse.com/forum/fb.asp?m=9863400