New 50' Mystic pleasure with V16's

[BraceYourself]

How much more does this setup weigh than a single big block with a blower???? How much more than a turbine setup??? Is it Onkins boat or a customers????

Was told it weights the same or less then a Merc 1075.

 

[Brad]

How do you get two engines to support 1 drive?

 

[Knot 4 Me]

Don Onken (not Onkin). The boat will have Arnesons. Not sure if they will be using the 2-speed trannys that were in JD's Skater but I can ask. Don used to run the Mr. Goodwrench 38 Bertram back in the early 90's. I hope to be able to get over to the shop to see the boat in person soon. It is Don's personal boat but as with anything I'm sure it could be bought.

 

[Knot 4 Me]

BTW, I believe I have seen JD Onken post here before so maybe he will chime in and answer any questions that folks have. I'll let him know there is a thread on SOS concerning the new Mystic.

 

[Knot 4 Me]

How do you get two engines to support 1 drive?

If you are talking about the 46' Skater they are coupled with a chain box.

 

[Salesmanship]

We built the Warbird 50 cat back in 01 with our own V16's. It was two 850's back to back with a gear case in between. It was a cool set up but the 6's couldn't handle the torque.

 

[Chris]

Tom purchased this boat which has the same setup as Don Onken's 46' Skater, Joe Mach's Dirty Laundry, Jim Learnado's 4 of a Kind, Dan Campbell's Jaguar, etc. etc.

If I remember, Tom used dual input chain boxes and the engines were offset to allow the front driveshaft to pass. Another interesting application was the big Conquest quad-engine boat.

The Onken setup connects the output of the first engine to the crank snout of the second. I wonder what crank life is like.

In reality, powerboaters learned most of this from the early multi-engine land-speed cars.

 

[Chris]

Was told it weighs the same or less then a Merc 1075.

They're a pair of big-blocks. They use aluminum blocks and they don't have blowers, but otherwise it's a pair of big blocks and the hardware to couple them. I don't know where the weight savings could come from that would get them even close to a single 1075.

 

[Wahoo 214]

As Chris said if they are connected without a trans between them, keeping the cranks in line would be very difficult. Being very smart guys I'm sure they got it handled, but watching video of my engines in a rough race you can really see how much they move around in the boat. Having one engine going one way and the other going the other way can't end well.

 

[Knot 4 Me]

As Chris said if they are connected without a trans between them, keeping the cranks in line would be very difficult. Being very smart guys I'm sure they got it handled, but watching video of my engines in a rough race you can really see how much they move around in the boat. Having one engine going one way and the other going the other way can't end well.

No trans between the two engines. Coupled directly together. And if memory serves (been awhile since I looked at the motors up close) the coupling was very simple. Eickert worked with one of the crank manufactures on special cranks for these motors. My guess is they have come up with a mounting system that keeps the motors locked together to prevent movement between the two in rough conditions.

 

[runninhotracing]

They're a pair of big-blocks. They use aluminum blocks and they don't have blowers, but otherwise it's a pair of big blocks and the hardware to couple them. I don't know where the weight savings could come from that would get them even close to a single 1075.

I don't know where the weight savings could come from that would get them even close to a single 1075

thats exactly what i was thinking but still a cool winter project :cheers2:




ROCK ON !!!!!!!!!!!!!!!!!!!!!!!!!!!!!:sifone:
ITS A SKATER NATION !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
DRYDEN PERFORMANCE MARINE 302-367-4962 :driving:

 

[db71]

At least these guys put up thier own money to test a new idea not only that but in the biggest way possible.

I can definatley see the weight savings that is why I asked think aluminum blocks, only one set of motor pulleys-pumps per side, no blower or intercooler and aluminum intake for fuel injection. But what do they consider close to a 1075 in weight

I live about an hour from these guys I should go check it out the boat is at Dave Scotts now correct? If that is the case I'll wait till it comes home.

 

[Salesmanship]

Our system had a gear box in between then to an output shaft that hugged the rear motor.
From there it went to an offset box and then to the tranny.
That way both motors spun in the normal rotation and the motors were mounted in line with the drive.

 

[BraceYourself]

They're a pair of big-blocks. They use aluminum blocks and they don't have blowers, but otherwise it's a pair of big blocks and the hardware to couple them. I don't know where the weight savings could come from that would get them even close to a single 1075.

All Aluminum Engine, block also. Closed cooling. At least this is what Keith Eichert said.

 

[Sean H]

At least these guys put up thier own money to test a new idea not only that but in the biggest way possible.

I can definatley see the weight savings that is why I asked think aluminum blocks, only one set of motor pulleys-pumps per side, no blower or intercooler and aluminum intake for fuel injection. But what do they consider close to a 1075 in weight

I live about an hour from these guys I should go check it out the boat is at Dave Scotts now correct? If that is the case I'll wait till it comes home.

it's not at nauti marine yet, will be later to get rigged though.

 

[GENERAL LEE]

If I remember, Tom used dual input chain boxes and the engines were offset to allow the front driveshaft to pass. Another interesting application was the big Conquest quad-engine boat.

The Onken setup connects the output of the first engine to the crank snout of the second. I wonder what crank life is like.

In reality, powerboaters learned most of this from the early multi-engine land-speed cars.

Nice memory Chris, whew! :ack2:


We're supposed to be getting a pleasure Mystic like that on Grand Lake this Summer. :willy_nilly:

 

[db71]

One thing about the weight is it would be a different type of weight for sure the weight is spread out 8 ft instead of 4 I would not know how much that would affect balance in a 50ft boat. Where is the boat now????

 

[Sean H]

it's at onken/eikerts getting some stuff mocked up. nauti marine just delivered the boat from mystic to onken's (not loaned the trailer) last month.

 

[Chris]

The Gentry guys were nice enough to let me crawl around the boat after the '85 race in Grand Haven. It was an awesome piece. It had surface drives of their own design with rudders behind the props. The water pickups were on the lower tip of the rudder and the tubes ran up the backside. The boat was built of mahogany- the bottom was finished in varnish. Very cool. Today the boat is inside the Motorsports Museum at Talladega Speedway

 

[GENERAL LEE]

The Gentry guys were nice enough to let me crawl around the boat after the '85 race in Grand Haven. It was an awesome piece. It had surface drives of their own design with rudders behind the props. The water pickups were on the lower tip of the rudder and the tubes ran up the backside. The boat was built of mahogany- the bottom was finished in varnish. Very cool. Today the boat is inside the Motorsports Museum at Talladega Speedway