New Mercury Racing 450R Delivers Unrelenting Outboard Performance

[powerabout]

we have had supercharged IL 6 for a few years so now we have a supercharged v8.
I think 300x to 300xs was a bigger jump forward with its significant fuel savings IMHO

[engineermike]

Still the cheap way out.

How can you say they took the cheap way out and also say the new engines have too many parts and are too expensive? How much does the largest die-casting machine in North America cost? Is it cheap? Are power valves the expensive way out?

...Take existing car tech and roll it into an outbound package. That's imitation not innovation.

Taking a 1986 dirt bike power valve and putting it in an outboard is innovation then, by your logic? And how many cars have die-cast engine blocks and heads?

Really my IQ? I find that comical as I know that number. I know it because people thought it high enough to be worth knowing.

Why do your posts read like they're written by a 5th grader then?

[davemvegas]

Some people are just butt hurt because they can't afford a new merc. And take it out on the ones that can by berating the product.

I am Butt Hurt because i can not afford one. I am proud of myself for not blaming Mercury 4 strokes as the reason. I clearly see that Burger King is the cause. $11 per hour is not considered a Whopper of a paycheck.

[David]

If a supercharged 2 stroke diesel can work, why not a supercharged 2 stroke spark ignition?

Do you think the 4 stroke SS2000 will outrun my 200XS SS2000? If yes, then I did not need to buy the 200XS last year.

I remain a two stroke fan but the Merc V8s are very impressive.

[Whaaaaat]

Funny you should say that fifth grade is when I learned car motors don't belong in boats.
Investing in new casting technology is something they needed, choosing to use it to build car motors is a cheap way out. The r and d has been done already by car manufacturers. Saves money on engineering.

I too had jet ski's when they went 4 joke is when I quit. They were big heavy and no fun. Not light nimble and playful. And not any more reliable at first. Superchargers would self destruct every 100 hours and send shrapnel they the motor.
I quit trying to have water toys for years and stuck to fishing boats. When it was time for a water toy again I opted for a fast nimble boat instead of a jet couch, holds more beer and bikinis,. Now the speed boats are going down the same path as the ski's. Big heavy boring fast, and complicated. In ten years a young newcomer won't be able to buy a used boat and maintain it himself. There gone overprice and over complicate the next generation right out of the sport. It's sad really.

The point I keep getting at is if the same amount of effort had been thrown at 2 stroke tech this whole time, instead of trying to make 4 joke work where it don't belong. We would have seen these power levels from the entire marine industry years ago.

[engineermike]

If a supercharged 2 stroke diesel can work, why not a supercharged 2 stroke spark ignition?.

”Supercharged” 2-stroke diesels need the air pump because they are not crankcase scavenged. They won’t run without the blower and they do not build >1 atm in the cylinder.

[davemvegas]

[QUOTE]

If a supercharged 2 stroke diesel can work, why not a supercharged 2 stroke spark ignition?

I think a 2 stroke Detroit Diesel is nothing like a 2 stroke outboard. Detroit has overhead valves and also a oil pan full of oil. Detroit cylinders are same as a 4 stroke motor. No ports cut in cyl. Uses a camshaft and rocker arm/push rod valve train. Intake and exhaust ports are in cyl head.

[FMP]

Screaming jimmys

[Whaaaaat]

Only exhaust valves. Intake ports in the cylinders just like outboard. Needs a supercharger to function. A "natural" Detroit is supercharged. They add turbos on top of that

[David]

I saw SAE papers about 2 strokes with valves in the 80s. I think you'd need some way of not pushing all the charge out the exhaust ports.

Back then there were a few companies trying to make 2 strokes work for car engines. As I recall, the problem was emissions after 50,000 miles, but that was 30 years ago so I could be dead wrong. I'm sure Orbital was trying to sell their fuel injection system for cars, but 2 or 4 stroke? Optimax is the Orbital system.

Of course once you load up a 2 stroke to 4 stroke complexity the appeal is at least 1/2 way lost.

Just bring that 4 stroke SS2000 up to Ontario and we'll have at it. And we will both be passed by the local offshore guys with the new 450's.

[powerabout]

[QUOTE=davemvegas;3142708]

I think a 2 stroke Detroit Diesel is nothing like a 2 stroke outboard. Detroit has overhead valves and also a oil pan full of oil. Detroit cylinders are same as a 4 stroke motor. No ports cut in cyl. Uses a camshaft and rocker arm/push rod valve train. Intake and exhaust ports are in cyl head.

except there are ports in the cylinders, that how the air gets in..
skipping that, there are turbo e tec sleds, yes some air gets wasted but due to the dfi no fuel is.
I wonder how their BSFC is, would it scale up to 3.0ltr engines??
IMHO the punters that dont have e-tec type injection have given up as thats seems the only clever route to a modern 2 stroke.
E-tec put the 2 stroke at the forefront of emissions especially when cruising
How many EPA stars is the 450? (EDIT 3 star)

[Whaaaaat]

Used to work on a pair of 16v 143's generators. What a sound they make!

[FMP]

Except the pressure wave released as the ex port opens is not waisted as you think, it's used in proper timing to pressurize the next closing ex port's cylinder on the compression stroke. It's highly significant and raises cylinder pressure. Supercharging is how it has been described by OMC and Merc in technical papers of design.

If you care to watch the degree counter you will notice the exiting blowdown pulse and the leading cylinders blowdown pulses arriving to pressurize the ex port and cylinder prior to the port closing.
https://m.youtube.com/watch?time_con...&v=fSko92cWLcE

[FMP]

No , thank you Power

[home made tunnel]

This thread took a left turn at Albequerkee. (Quoted from Bugs Bunny)