Ingredients to make killer 2.0

[Krazymaan]

Chaz must be having some whiskey with his coffee

Nope, you got that backwards he usually has a shot of coffee with his whiskey

[90 5.0]

I gotz all ya'all whooped .... Im neckin down a 3.2 Merkury ta 1.7 Litre'z ... !

My wet finger in the air dyno sez 450 HP @ 17,682 RPM ...

The way that’s written if you don’t look at the screen name you can imaging mike posting that years back

read it in his voice and it’s even funnier!!


on a serious note , it’s not a bad idea. The 2.0’s are notoriously bullet proof in comparison to some other motors.

Thick cylinders and beat on it at the sand bar. I can get behind that.

[90 5.0]

I'm just talking about on a lake with friends and goof balls. Nothing too serious.

I was completely agreeing, 2.4 on a light boat hurts a 2.5 on a heavy boat. Just using weight breaks in classes as an example.

But the boat the 2.5 is on needs to be significantly heavier.

[patchesII]

Yep, 200-250 lbs

[XstreamVking]

Look at the merc racing motors specs. That's how high you can spin one. And have it last longer than 1 hr.
Here's one going 10500 r's. https://www.youtube.com/watch?v=XZkxJJrB9ZM

[Michael J Giesler]

A good 2.5 pro mod / pro drag aka outlaw motor 11,000-11,500 a little 2.0 mod u motor 11,000-11,500 but the bores will last longer

[Chaz]

Chaz must be having some whiskey with his coffee

Now boss man .... you know I like me a big ol cheeseburger wiff my coffee ...

5.0 :

The way that’s written if you don’t look at the screen name you can imaging mike posting that years back

read it in his voice and it’s even funnier!!

Aye Bouy , I jus tri-inn to feet een wit de nu loat of tech czar'z aye ...

[patchesII]

Giesler nailed it. I don't think the 2 liter will turn any more rpm than the 2.5. Certainly not enough to overcome the difference in torque

[90 5.0]

So let me ask why you all think a 2.0 will not rev higher?

It’s the same crank throw with a smaller piston, generally speaking when comparing motors in other aspects the motor with the shorter crank throw spins higher.

If you took a 2.5, and destroked it to 2.0, vs sleeving it down I then could see higher rpm.

But thays just speculation.

[90 5.0]

A good 2.5 pro mod / pro drag aka outlaw motor 11,000-11,500 a little 2.0 mod u motor 11,000-11,500 but the bores will last longer

I’ve heard stories of some old roundy round guys getting the 2.0 race motors up around 13k, but I’ve never seen it.

So I say it’s “possible” but they might just be shop stories, you know how that is.

A better question is why wont a 2.4 turn over about 8500, but I’m sure porting isnthebanswer there

[Chaz]

It’s the same crank throw with a smaller piston, generally speaking when comparing motors in other aspects the motor with the shorter crank throw spins higher.

If you took a 2.5, and destroked it to 2.0, vs sleeving it down I then could see higher rpm.

But thays just speculation.

As accurate as that is , I would file that under "basic engineering principals" instead of speculation ..

Although I have found that the best alternative to more displacement is to "add" cubic inch's ... It's nice to see that two years later that my ideas on the importance of transfer port layout are starting to sink in ....

[powerabout]

smaller bores in an outboard allow larger ports in the block, I wonder if that makes a difference?

[Capt.Insane-o]

rpm..... used to be this kid in my neighborhood that had a nice 10-12 speed whatever bike. Always saw him in 1st 2nd or 3rd peddling at the speed of light trying to keep up with everyone else.

[JrCRXHF]

piston speed and the forces that go with it limit a lot of motors in terms of short blocks and rotating assemblies.

[Capt.Insane-o]

Ignition component saturation comes into play too,