What makes a SISU so "fast" ???

BillD

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25 Terry Jason with Cummins 370 power
From another thread about the "speed" of Novi boats.

A forum member asked..........................?

"are there Novi's out there that can get over 20knts?"

A forum member replied........................?

"Only ones I know of have Sisus in them".

OK, what in the world makes the SISUs push these boats,,, or any boat,,,, so doggone fast ??

There doesn't appear to be as many boats with SISU power as other name brand marine diesels. Doesn't appear to be a huge dealer network here in the states.

Are these SISUs racing engines??? What is the SISU origin and what "makes these engines so fast". What are the hidden SISU secrets?

Gotta be somethin different about the SISUs than the other diesel engines used in boats?

Curious,

Bill D

btw, Travis, i'm just bustin them on ya but in all seriousness I have wanted to ask the question about the SISUs. You sell them, you like them, what about them?? Good engine? great engine?, what makes the engines tick and last?? Strong points? Weak Points? Why do you sell and promote the SISUs above the other brands??:D
 

F/V First Team

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Northern Bay 36 - Modified
1250 mm long 49.2 inches
640 mm wide 25.2 inches
1060 mm high 41.7 inches
690 kg 1521 lbs

111 mm bore 4.37 inches
145 mm stroke 5.70 inches
2100 rpm

8.4 L displacement 512.6 cubic inches

Big and heavy?
 

BillD

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25 Terry Jason with Cummins 370 power
1250 mm long 49.2 inches
640 mm wide 25.2 inches
1060 mm high 41.7 inches
690 kg 1521 lbs

111 mm bore 4.37 inches
145 mm stroke 5.70 inches
2100 rpm

8.4 L displacement 512.6 cubic inches

Big and heavy?

I read the brochure.
I can't find the torque curve of the 8.4

Would this 8.4 SISU be an apples to apples comparison to say the
QSC 8.3 500 @ 2600?
or
the QSL 8.9 405 @ 2100 ?

I'm tryning to get a comparison in my mind?
 

badabing

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how do you figure it chews up qsm11s? just curious
i didnt think the sisu had the higher hp ratings
 

F/V First Team

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sure they do

"A dominate boat on the circuit for almost a decade has been
Travis Otis’ FIRST TEAM [Northern Bay 36, 410-hp Sisu 645] and
in race 11, diesel, 351 to 450 hp, 36 feet and up, he had little trouble
with his competition. Second went to Spencer Dyer’s THE CHAIN
[Holland 38, 330-hp Caterpillar 3126] and third was Ethan Fink’s
TAYLOR C. [Holland 38, 430-hp Cummins]." <- QSM11

"There was only
one entrant in Class G, Todd Ritchie’s SEACOCK [Calvin Beal 34,
436-hp Sisu] and Class J, David Myrick’s JANICE ELAINE [Northern
Bay 38, 610-hp Cummins].(<- QSM11) The class that needed to be decided was
H, which had two entrants Travis Otis’ FIRST TEAM [Northern
Bay 36, 410-hp Sisu] and Ed Shirley’s ASKK’N [Calvin Beal 38, 525-
hp John Deere]. First over the line was FIRST TEAM followed by
JANICE ELAINE, SEACOCK and ASKK’N."

So yes, they sure do. Om nom nom nom.

4-SE-040.jpg
 

BillD

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badabing

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hmmm? i have never seen a qsm 430hp listed a 8.3 c yes but not the qsm11 but i see the only downfall of the cummins is it is much heavier and that may be where the sisu is winning but tough to tell and at least we can tell travis isnt biased......haha
 

BillD

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Let me ask this.
In your "fleet" of SISUs sold/maintained etc.
Any engines have over 5,000 hrs on them?
10,000 hrs.?

I'm trying to get a sense of the "robustness" of the SISUs out on the wild blue seas, not the drag racing circuit?

The majority of us here do not race!
 

WoundUpMarine

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joelucci33

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"A dominate boat on the circuit for almost a decade has been
Travis Otis’ FIRST TEAM [Northern Bay 36, 410-hp Sisu 645] and
in race 11, diesel, 351 to 450 hp, 36 feet and up, he had little trouble
with his competition. Second went to Spencer Dyer’s THE CHAIN
[Holland 38, 330-hp Caterpillar 3126] and third was Ethan Fink’s
TAYLOR C. [Holland 38, 430-hp Cummins]." <- QSM11

"There was only
one entrant in Class G, Todd Ritchie’s SEACOCK [Calvin Beal 34,
436-hp Sisu] and Class J, David Myrick’s JANICE ELAINE [Northern
Bay 38, 610-hp Cummins].(<- QSM11) The class that needed to be decided was
H, which had two entrants Travis Otis’ FIRST TEAM [Northern
Bay 36, 410-hp Sisu] and Ed Shirley’s ASKK’N [Calvin Beal 38, 525-
hp John Deere]. First over the line was FIRST TEAM followed by
JANICE ELAINE, SEACOCK and ASKK’N."

So yes, they sure do. Om nom nom nom.


Im sorry...nothin like a good B**** Slap
 

MouseTrap

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"A dominate boat on the circuit for almost a decade has been
Travis Otis’ FIRST TEAM [Northern Bay 36, 410-hp Sisu 645] and
in race 11, diesel, 351 to 450 hp, 36 feet and up, he had little trouble
with his competition. Second went to Spencer Dyer’s THE CHAIN
[Holland 38, 330-hp Caterpillar 3126] and third was Ethan Fink’s
TAYLOR C. [Holland 38, 430-hp Cummins]." <- QSM11

"There was only
one entrant in Class G, Todd Ritchie’s SEACOCK [Calvin Beal 34,
436-hp Sisu] and Class J, David Myrick’s JANICE ELAINE [Northern
Bay 38, 610-hp Cummins].(<- QSM11) The class that needed to be decided was
H, which had two entrants Travis Otis’ FIRST TEAM [Northern
Bay 36, 410-hp Sisu] and Ed Shirley’s ASKK’N [Calvin Beal 38, 525-
hp John Deere]. First over the line was FIRST TEAM followed by
JANICE ELAINE, SEACOCK and ASKK’N."

So yes, they sure do. Om nom nom nom.

attachment.php


All I have to say is; that is an awesome picture!
 
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MDI45

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Bill,I dont think Sisu power is any different then the others engines out there in it's class.....300 lbs give or take..is not going to make a huge difference...What i believe is ...(which some guys here dont know)The Otis family is very good at what they do.They build boats for a living and live to race..and the combination of the 36 Northern Bay and the Sisu..makes a great race boat...
 
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