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Decided to build my own diesels (pic heavy)

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Old 01-22-2012, 02:37 PM
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Why not use a surface drive ?
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Old 01-22-2012, 03:02 PM
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Diesel2fast4U:

Be grateful you have someone like HabanaJoe on this forum to consult , offer experience and help you. His 40 years plus of real performance diesel experience and knowledge is priceless! I consider him one of the ZEN masters in how to get reliable horsepower and speeds out of marine diesels. Learn from the experts like Joe and learn maybe just enough to make your project successful. He knows his Sh*t! about diesels!
Glad to see people like yourself push the envelope and make big things happen from small beginnings! Good Luck and keep up the good developments in diesel performance!
I will also follow your project here on OSO with greatfull attention.

Best Regards,
Ray @ Raylar
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Old 01-22-2012, 03:35 PM
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Originally Posted by Raylar View Post
Diesel2fast4U:

Be grateful you have someone like HabanaJoe on this forum to consult , offer experience and help you. His 40 years plus of real performance diesel experience and knowledge is priceless! I consider him one of the ZEN masters in how to get reliable horsepower and speeds out of marine diesels. Learn from the experts like Joe and learn maybe just enough to make your project successful. He knows his Sh*t! about diesels!
Glad to see people like yourself push the envelope and make big things happen from small beginnings! Good Luck and keep up the good developments in diesel performance!
I will also follow your project here on OSO with greatfull attention.

Best Regards,
Ray @ Raylar
Thanks Ray
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Old 01-22-2012, 03:37 PM
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Ray, so I should let you have the Amex Black Card for how long? LOL

Thanks, that was a well needed boost today, with a 17 year old in the house who knows everything about everything I'm becoming doubtful if I even know my own name somedays - Kids!
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Old 01-22-2012, 03:51 PM
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Originally Posted by HabanaJoe View Post
Just a suggestion, if you run 3 bars that like 40-45 psi, that's high in any book. I believe you will be best served down in the 11.5-13:1 range. Yes, a little hard to start, might need a ether shot on a cold day. You're talking mechanical compression ratios and not taking into account that with all that air in there your actual ratio under boost will be allot higher. The cylinder pressures are going to be extreme with 18:1 and 43 psi of boost, this is not a good combination for a long lived engine, my opinion.

Just some food for thought about what you are doing with the 2 turbochargers for next engine design.

You mention exhaust pressure, that is pressure inside the manifold before the turbocharger not exhaust back pressure and you are spot on if exhaust pressure is as high as boost pressure the engine runs rich and flattens out in the power band - that is why the comment the diesel torque curve goes to a point and stays semi flat, by design standard engines get to a point where they stop breathing and are neutral.

A better route for two turbo-chargers might be where the two turbos are mounted in parallel and not separated like you have them. What you need to build is a gate between the two turbo chargers so only one works are lower speeds and you can open the gate and allow both to run when at higher speeds. This is old school (not compound) and by doing it you cut your exhaust manifold pressure in half when open and doubles the amount of air flow, not pressure but CFM's and will allow the engine to breath much better. This is not new it's old racing SeaTek and Isotta stuff. With the VGT's you accomplish some of it and you can dump xhaust pressure with a waste gate as well but with the twin in parralel and gated you won't be dumping energy you can use - just a thought to throw around next time?
Hi Joe, yes you are welcome to comment offcourse !

We have been thinking about the turbo's for a long time, first we wanted to go a different route... But decided to do it this way because the plumming is so much easier.

Our computer can control up to 3 turbo's, we decided to go for these GTB2056VL because on a 2 liter they make already 1 bar at 1400 rpm and are good for 230 hp a piece.

My tuner is young guy who calibrates engines for a living in a factory in Germany were he does all kind of diesel engines.

Standard this engine is making 200 HP so normally our goal should be reachable.

About the cooler(s) and cooling and compression ratio...
Absolutely, he has the same opinion. First we will be trying to run the fresh water true through the engine.

Weak spot will be the pistons.

I had the injectors modified so we can keep injection times as short as possible

Like all new projects we need a baseline to start with, that's why I want to have one on the dyno as soon as possible.

I am working on the intake & cooler tomorrow, I'll take pics & post

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Old 01-22-2012, 03:53 PM
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Originally Posted by Steve 1 View Post
Why not use a surface drive ?
Because I don't like them

No serious, It's a waterski boat so I don't want a rooster tail & props are to hard to get for us.
Also the boat was designed for drives (or outboard) and needs that skeg in the water to hold in the turn
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Old 01-22-2012, 04:03 PM
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Originally Posted by diesel2fast4u View Post
Because I don't like them

No serious, It's a waterski boat so I don't want a rooster tail & props are to hard to get for us.
Also the boat was designed for drives (or outboard) and needs that skeg in the water to hold in the turn
Just the fifty or so horsepower loss Via changng directions through each outdrive and the Arneson'a have a very healthy Skeg system,I did not know you were Sking behind it.
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Old 01-22-2012, 04:10 PM
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Originally Posted by Steve 1 View Post
Just the fifty or so horsepower loss Via changng directions through each outdrive and the Arneson'a have a very healthy Skeg system,I did not know you were Sking behind it.
You are right, but I didn't dare to change everything I know.

Today we are running with skier with the tripple X boat 93 mph.
With a healty 500 EFI (3 days ago dynoed 508 HP at 5400 RPM)

I have been thinking about this project for 2 years, I want 100 MPH, reliable HP and 2 drives and DIESEL (fuel is 2usd a liter here)
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Old 01-22-2012, 04:11 PM
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What bothers you about the pistons?

I don't know your engine but I have a few piston questions for you if you don't mind let's start with liners or not and if liners: is the liner is used as the compressor seal or not?
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Old 01-22-2012, 04:18 PM
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Originally Posted by diesel2fast4u View Post
You are right, but I didn't dare to change everything I know.

Today we are running with skier with the tripple X boat 93 mph.
With a healty 500 EFI (3 days ago dynoed 508 HP at 5400 RPM)

I have been thinking about this project for 2 years, I want 100 MPH, reliable HP and 2 drives and DIESEL (fuel is 2usd a liter here)
You say 100mph and you have a bravo drive for lack of a better word, that drive has 1.5:1 gears in it I assume and you want to turn the engine 6,000 rpm and make 400 hp BUT now you have 500 hp and only go 93 mph - how are you getting to 100mph?

I'm not being smart azz just what I think you said doesn't add up to faster, in fact a lot slower in my mind?
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