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Old     (Yoshehiro)      Join Date: Feb 2014       12-15-2014, 7:38 PM Reply   
Hey guys.

I build 383 stroker from ex330.
I used eagle rotating assembly kit and neutral balance flywheel.

Also, I use stock MEFI injection system and any other component.
However, I needed to rewrite the MEFI file.
It needs exclusive softwere.

It has power more powerful than ZR450 and ZR409.
It has around 450hp to 500hp.
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Old     (Yoshehiro)      Join Date: Feb 2014       12-15-2014, 7:40 PM Reply   
specifications
new 1PC 4 bolts main sbc 0.03" over size block
new EAGLE rotating assembly kit with neutral flywheel.
new 0.03" over size with -12cc volume piston top
new 5.7" connecting rods
new cam 225/231@0.05' lift lobe angle 112
new aluminum cylinder heads 190cc/64cc camber with 2.02' / 1.60' valve springs
rewrite MEFI 4B for 383 calibration
Old     (Yoshehiro)      Join Date: Feb 2014       12-15-2014, 7:44 PM Reply   
http://youtu.be/K9FeVkmhSNA
http://youtu.be/ns5ZmpDGIKo
http://youtu.be/ikkHqKhFQi4
Old     (nailem)      Join Date: Apr 2011       12-16-2014, 6:16 AM Reply   
very cool! did you have to do anything to the drive to beef it a up?
Old     (wakebordr11)      Join Date: May 2001       12-16-2014, 8:06 AM Reply   
How fast?
Old     (Greeko)      Join Date: May 2013       12-16-2014, 9:46 AM Reply   
Thats awesome man!!! good job!
Old     (Yoshehiro)      Join Date: Feb 2014       12-16-2014, 3:59 PM Reply   
I didn't additional anything to the drive.
Couse, the boat has very big torque converter (= water!)

Please imagine this motor has power of more than ZR409.
especially, more than 2500rpm are strong.
Old     (bftskir)      Join Date: Jan 2004       12-16-2014, 4:44 PM Reply   
What max rpms? What max mph gps? What prop?
Nice job. Not easy to get a good strong tune on the mefi.
Old     (Yoshehiro)      Join Date: Feb 2014       12-16-2014, 11:24 PM Reply   
I think max rpm is over 6000rpm.
But I set rev limit at 5750rpm.

The boat doesn't have GPS, it has paddle wheel.
So, I don't know max mph and when boat is over 45km/h, it begin pitching because of the weight.

Prop is ACME422.
MEFI tune need software for tune.
Old     (Yoshehiro)      Join Date: Feb 2014       12-17-2014, 2:43 AM Reply   
http://youtu.be/fy7P4vfWSQA

this video is 377 stroker from ex330 on the 2002 ski nautique.
This engine have 4 inch bore x 3.75 inch stroke with stock camshaft.
low range and start up looks like kick on the back.
but mid range and top end is unsatisfying.

However, this engine is more powerful than ZR409.

Last edited by Yoshehiro; 12-17-2014 at 2:46 AM.
Old     (wakebordr11)      Join Date: May 2001       12-17-2014, 7:50 AM Reply   
Quote:
Originally Posted by Yoshehiro View Post
http://youtu.be/fy7P4vfWSQA

this video is 377 stroker from ex330 on the 2002 ski nautique.
This engine have 4 inch bore x 3.75 inch stroke with stock camshaft.
low range and start up looks like kick on the back.
but mid range and top end is unsatisfying.

However, this engine is more powerful than ZR409.
What's the point?
Old     (Greeko)      Join Date: May 2013       12-17-2014, 8:21 AM Reply   
Quote:
Originally Posted by wakebordr11 View Post
What's the point?
Because he wanted to!

Maybe he wants to surf and load the boat with 15,000 lbs...

Who cares, Its a wicked project period!
Old     (Redheadd)      Join Date: Apr 2014       12-17-2014, 8:30 AM Reply   
Japanese engineering!!
Old     (wakebordr11)      Join Date: May 2001       12-17-2014, 1:29 PM Reply   
Quote:
Originally Posted by Greeko View Post
Because he wanted to!

Maybe he wants to surf and load the boat with 15,000 lbs...

Who cares, Its a wicked project period!
All he's got to say is the engine is more powerful than the ZR 409. Which I think is sweet, but I still don't see the point. He doesn't have it propped or setup to go fast and its not going to pull that much more weight than a stock motor with a low pitch prop...
Old     (Yoshehiro)      Join Date: Feb 2014       12-17-2014, 7:14 PM Reply   
I already used stock(=ex330) with ACME 480.
The boat usually loads with 3400lbs weight and some persons.
I tried to 383 with ACME 480, but the prop was slipped and not go fast planing.
So, I took ACME422.

I cannot understand what is "point".
What do you mean point?
What do you want to see?
Old     (mortbike)      Join Date: Feb 2005       12-17-2014, 8:33 PM Reply   
Quote:
Originally Posted by wakebordr11 View Post
What's the point?
the point is there are MANY boat owners who have 5 - 10 y/o boats, that either will not buy a 125k boat or cant buy a 125k boat. but 10 grand and get a rebuilt motor with more power is a no brainer. thanks Yoshi for posting this info.
Old     (Yoshehiro)      Join Date: Feb 2014       12-17-2014, 11:55 PM Reply   
Sorry, I understood "what's the point" right now.

ski nautique's video is just reference.
This engine have power under the 383.
But water skier said very strong pull more than ski 200 with zr6.
I think engine power is needed to put more weight into the boat.
Stock engine and low pitch prop have limit.
Old     (Redheadd)      Join Date: Apr 2014       12-18-2014, 8:17 AM Reply   
No more limit!! This dude is bad ass!!
Old     (Redheadd)      Join Date: Apr 2014       12-18-2014, 8:17 AM Reply   
He's like "horsepower? ya I got 500!"
Old     (onetogofast)      Join Date: Jun 2012       12-18-2014, 12:13 PM Reply   
Who will tune it once you have the MEFI software? I wish I was smart enough and capable of tuning, I have to pay the shop in town to do my vehicles each time.
Old     (WheelerWake)      Join Date: Mar 2013       12-19-2014, 2:18 PM Reply   
This is the kind of project I like!!
Old     (Walt)      Join Date: Jan 2003       12-19-2014, 5:25 PM Reply   
Nice work !
Old     (fic)      Join Date: May 2008       12-20-2014, 4:43 AM Reply   
Your raw water filter is upside down in the photo eventually you will develope an air pocket and loose pump prime!
Old     (Yoshehiro)      Join Date: Feb 2014       12-22-2014, 6:42 PM Reply   
Quote:
Originally Posted by fic View Post
Your raw water filter is upside down in the photo eventually you will develope an air pocket and loose pump prime!
Thank you for your advice.
I will rotate raw water filter upside down.

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