New 33 Young Brothers

El Mar

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MDI45

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Anyone know what kind of numbers they get with a 400..my buddy has a light Wayne Beal with a cummins 400...tops out at 26 kts
 

Frank Grimes

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Anyone know what kind of numbers they get with a 400..my buddy has a light Wayne Beal with a cummins 400...tops out at 26 kts
I think the 33' YB is right on the 3:1 pin, so she's probably go a little better than the WB. Youngs are fast all all git out if they are built light....I wonder which Iveco motor? I know (or at least I thought) they share some blocks with Cummins.....
 

BillD

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I think the 33' YB is right on the 3:1 pin, so she's probably go a little better than the WB. Youngs are fast all all git out if they are built light....I wonder which Iveco motor? I know (or at least I thought) they share some blocks with Cummins.....
ZERO truth in rumors on Iveco sharing common blocks with Cummins!

5.9 Common bore/stroke (102X120) in the block, that's about it.

Robustness in the "crank/block/innards", apples and oranges!
 

tunaorlater

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How would you guys rate the Iveco engines? They seem like a good bang for the buck, I had one in my 28 BHM years ago and was a very well built engine but at the time there were 0 parts locally. I switched it out with a 250hp Cummins.
 

Powderpro

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ZERO truth in rumors on Iveco sharing common blocks with Cummins!

5.9 Common bore/stroke (102X120) in the block, that's about it.

Robustness in the "crank/block/innards", apples and oranges!
Bill- I was under the understanding, that the Cummins and Iveco were the same long blocks, but marinized by the respective companies. I thought the 5.9 Cummins and Ivecos were identical, as well as the Iveco and Cummins 6.7's. Guess I may have been wrong; where did you get your information?

As far as experience with Iveco engines, I installed their 5.9 liter (they call it the N60) that was an A2 rating of 370 hp. It performed impressively and the power to weight ratio is great. Very strong, fuel efficient, smooth, etc. This next boat I'm starting on in a week will have the 6.7 liter N67 A2 rated 420 hp, which is probably the same exact engine that will be going in this new 33' Young bros.
 

Powderpro

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Are you building this one in Bellingham?
Yes I am. We got the hull on the trailer, but won't be able to move it to the finish shop until the snow melts off the country roads. This new boat is a 37' Wegley, and it will have a fly bridge on top of that tall pilot house. We are hoping for about 22 knots wide open with the Iveco 6.7 420hp; 2.5:1 reduction, 28" diameter prop. Here are a few pics of it before we loaded it on the trailer. This boat is going be sweet.

DSCN7148.jpg

DSCN7149.jpg

DSCN7150.jpg
 

CaptDave

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Sharp looking Norwest Boat, good luck with the build. I spent a few months in Bellingham at the Shipyard with the Coast Guard and enjoyed my time there. It was an interesting town with some characters that is for sure.

Dave
 

BillD

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Bill- I was under the understanding, that the Cummins and Iveco were the same long blocks, but marinized by the respective companies. I thought the 5.9 Cummins and Ivecos were identical, as well as the Iveco and Cummins 6.7's. Guess I may have been wrong; where did you get your information?

As far as experience with Iveco engines, I installed their 5.9 liter (they call it the N60) that was an A2 rating of 370 hp. It performed impressively and the power to weight ratio is great. Very strong, fuel efficient, smooth, etc. This next boat I'm starting on in a week will have the 6.7 liter N67 A2 rated 420 hp, which is probably the same exact engine that will be going in this new 33' Young bros.
Brian, Cummins and Iveco sharing the same 6.7 block is "100% dock talk" spurred on by Fiat/Iveco dealers etc., to increase sales. The Fiat/Ivecos are good engines, maybe expensive on parts and service.

A couple months back I posted a question on boatdiesel about the "new Cummins 6.7" and whether it was an over bore or beefed up 5.9.

I got a couple of responses back from UK based Paul Foulston, not sure if he retired, a Cummins diesel design engineer.

His responses:

"Not a simple overbore, completely new rear gear drive block, strength not compromised, bore stroke 107 x 124mm.

As to the rest I can say no more!"

Paul




This is his response to a post by a forum member about the new Cummins QSB 6.7 being the Iveco 6.7:


"Must be the Iveco 6.7"

No, No, No! 5.9 is 102 X 120 common to Cummins and Iveco.

Iveco, increase the bore to 104 mm and offset grinds the 5.9 crank pin to increase stroke to 132 mm. More fresh air inside the engine at the expense taking some ´meat´ off the crank pin.

Cummins approach entirely different. Totally new block allows meat for 107 mm bore. If you have ever seen inside a 5.9 crank balance weights come within whisker of the camshaft. Jerl Percell at Cummins re-designed crank in area of balance weights in order that they could get throw of 126 mm WITHOUT compromising crank bearning area and still clear that pesky cam. The whole thing was then patented to stop the Italians getting their hands on it."

Paul

PS Think this answers Bill D I´s question"
 
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