Double Eagle, center console.

Report the performance of your boat, supply as much information as possible (weight, HP, prop, speed, etc.).
Subject: Make the Glen-L design name the subject. If the design already has a posting, add your information to that post.

Moderator: Bill Edmundson

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kens
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Location: Coastal Georgia

Postby kens » Mon Jan 14, 2008 4:23 pm

I just ran a 16x14 med cup. Got highest speed thus far, busted 30mph barrier, although briefly. But check this out. If it is a 14 pitch, and looking at Paul Kane's speed table, then I was running at about a 0% slip. We all know that can't be right. I did the math, and at 14 pitch it comes up to about 0% slip sure enough. It also loaded the engine to 4100rpm.
I have run a 16square at more rpm.
However, this prop did seem to have the highest speed @ 3000cruise.
How can this run at 0% slip?

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leakcheck
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Location: Lander Wyoming

Postby leakcheck » Tue Jan 15, 2008 3:59 pm

Kens, at least are you satisfied that you have solved your problem ?? That would be a good thing !!

Sometimes things just don't work on Paper. You would not believe how many plumbing things work on "paper"..but in the real world things are totally different. Just might be one of those cases !

Are you planning on putting a bigger motor in eventually too ??
]

Steve

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kens
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Location: Coastal Georgia

Postby kens » Tue Jan 15, 2008 4:30 pm

Dont know if the prop issue is TOTALLY solved just yet. I still cant tell if I am getting everything from the prop yet. This last one had a drumming vibe in it above 3600rpm.
Finally getting a 17dia to try out. Havent yet tried the 17.
I am wading thru all the supposed 'rules of thumb' and all the different opinions of prop shops. I would think that if I had a specific boat weight, then the prop guys could hit it EXACT. Well, they cant. Prop sizing is a lot of VooDoo & Black Magic.
As far a a bigger engine: I dunno. I can buy brand new longblock for the current engine for under $2K. A new diesel is >$15K. So, I could wear out 6 of these things for the cost of a new diesel.
However; a guy just dropped off a 170hp Yanmar into my garage. No charge!! All it needs is a complete rebuild.

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leakcheck
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Postby leakcheck » Wed Jan 16, 2008 2:14 pm

Are you serious ??? Dropped it off no charge ???? Holy smokes !1

Hey, my brother just rebuilt my engine. It is obviously not a marine engine and it is a sleeved motor, have no idea if what you have is sleeved or not but if it is it is a pretty clean rebuild, and he has the name of the diesel shop that can re-sleeve it if you do not have the tools.

I priced a new Diesel motor for my truck and it is out of sight. You can add eight grand with the new emision crap or whatever they have to do differently for trucks. I expect to get about 400K out of this one.

I think maybe gas is the way to go with boats too, I will have to lookk into what the Coastal cruiser suggests, and then start pricing..oh well, that is a ways off..

Well, it will be interesting to see what a 17" prop does ...dang you should have a complete chart on varying prop sizes for your boat design, that will be helpful to someone surely !1

Steve

QC
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Postby QC » Wed Jan 30, 2008 1:37 pm

kens wrote:Prop sizing is a lot of VooDoo & Black Magic.


Yup . . .

What was your WOT RPM with the 16 x 14? Speed was 30+? Is it possible it was actually a 14 x 16? . . . Did you see the numbers stamped in the hub?
If I had any dignity, that would've been humiliating - Adam from Mythbusters

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kens
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Location: Coastal Georgia

Postby kens » Wed Jan 30, 2008 4:17 pm

It was a 16x14 with some cupping. I know 14 pitch dont add up to that speed, but the added cup effected more pitch. This is the only prop I ran thus far that the cup gave more speed.

I am trying a 17x15 next.

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kens
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Location: Coastal Georgia

Postby kens » Sat Feb 02, 2008 5:13 pm

I just ran a 17x15 light cup. RPM were held wayyy too low, loss of speed, high fuel consumption, cavitation in reverse, vibration at WOT, blah, blah, blah.

However, I had to re-learn how to dock the thing with this wheel, prop walk was almost non-existant!! I gonna start a new thread on this one!

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kens
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Location: Coastal Georgia

Postby kens » Tue May 13, 2008 9:33 am

Does anyone out there remember the web address, or link, to the runabout, (I think a barrelback or similar) that had a 3.8L V6 in it?
It even had a youtube video with it.

upspirate

Postby upspirate » Tue May 13, 2008 9:43 am

Kens,
Here is the You tube link:

http://www.youtube.com/watch?v=ss_XhO4kIoY

Bruce T under : powerboats->my boat on you tube

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Mr Hot Rod
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Postby Mr Hot Rod » Tue May 13, 2008 10:20 am

Here's a link to Bruce's Page :

http://www.chelseacoachworks.com/boats/ ... _page.html

So you really are bulking up that engine . . .
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Paul Kane Chelsea, PQ

Building the Glen-L Hot Rod : http://www.boats.chelseacoachworks.com

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kens
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Location: Coastal Georgia

Postby kens » Tue May 13, 2008 3:54 pm

Paul:
I dont know if I am intending to 'bulk up' that little mill; but, I know it aint gonna keep up forever. It was tired when I put rings/bearings in it. And I am not showing it any mercy thus far. It is supposed to be 140hp, but I now believe its only giving me 115 at the prop. I am looking into a MPI injected 4 banger (that I cannot find), or a 6 cylinder.
Since I already have the 3.0L, a 250 straight six would fall into place with my current motor mounts, tin, carb., etc. Just the ticket with my single 3" exhaust already in place. However, the 250 six is an aged design. I may opt for a V6 (MPI injection is available) but that cost $$$.
So, I found a 3.8L OMC sterndrive boat for sale as a possible donor. Can you SBC guys tell me:

Can I bolt vortec heads onto the old 3.8L, 1983 vintage, and then go on to mount MPI injection on that??

Does anybody know if this can be done?

upspirate

Postby upspirate » Wed May 14, 2008 7:03 am

Don't know about the heads Ken,but here is a EFI site that may be of interest for retro-fitting & change over to EFI:

http://www.sdsefi.com/

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kens
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Location: Coastal Georgia

Postby kens » Wed May 14, 2008 5:59 pm

I found this also.
http://www.holley.com/700-21.asp
Does anyone have experience with TBI injection?
How does it do as far as fuel efficiency?

upspirate

Postby upspirate » Thu May 15, 2008 6:24 am

I had factory tbi on a GMC p/u & it delivered good mileage & performance I thought.

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Mr Hot Rod
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Postby Mr Hot Rod » Thu May 15, 2008 10:48 am

Kens,

Here are a few links to get you going ! Don't know what your budget is, but there are some nice systems out there !
Fuel Injection Technical Information :
http://www.holley.com/data/Catalogs/Fue ... ection.pdf

At the top of the food chain, we have the Holley Marine Commander 950 MPFI system PN 71002101 (3K).
While you're saving up to buy one, you can always read up on it . . .
Commander 950 PRO Total Engine Management System Electronics and Fuel Injection Manual :
http://www.holley.com/data/Products/Tec ... 0149-7.pdf

Automotive EFI conversion has been discussed on the DIY marinizing thread on boatdesign.net :
http://www.boatdesign.net/forums/forumdisplay.php?f=24
__________________
Paul Kane Chelsea, PQ

Building the Glen-L Hot Rod : http://www.boats.chelseacoachworks.com


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