Interesting Photo...

[FUJIMO]

[Chaz]

Nice line-of-sight port in this one. Any guesses as to what engine?

Well L.W. I don't guess .. I either know or don't .
I'm sure we could have some in depth conversation , that we both could learn something .. but you seem to be offended by everything I say .. then drag the thread into the weeds .. run to dad and tell him I'm a bully and am picking on you .
Hope ya don't mind .. but I'll pass ..

------------------------------------------------------------------------------------------------


For the rest of us ... Nice lookin Verado head , huh

They seem to be filled with water or oil reversion ...





So when the Ekanoo fellas would burn the Marianna's Trench from one end to the other ... who ya thunk their CNC guy trust's to stitch it back together ...






Two way street though ... when I need sumptin ..

[Scream And Fly]

This thread is priceless with photos and info, let’s please not ruin it ok? I have my mom in the hospital on a feeding tube now so really, please keep everything cool because it’s been very difficult to watch over things lately.

Greg

[Robby321]

This thread is priceless with photos and info, let’s please not ruin it ok? I have my mom in the hospital on a feeding tube now so really, please keep everything cool because it’s been very difficult to watch over things lately.

Greg

Sorry to.hear of your Mom. Been in and out hospital all year with MDS, a blood bone marrow cancer. Hoping for the best Greg.

[Headless Hula]

[FUJIMO]

[FUJIMO]

[Capt.Insane-o]

[FUJIMO]

...the eagle has landed...

[Capt.Insane-o]

Truck drivers loved it all the way to Jasper

[scott reierson]

Capt. is that yours??

I'm thinking that a inline seat setup would be alot easier to get around in for old guy like me. Nice eagle!

[mr fun]

In neutral and at idle.... if it's even running....................... Just an observation...........

don't know how much wheeltime you have in large vessels but from my perspective you don't drive a yacht , you finnese a yacht. lot going on there , wind, current. propulsion . just to name a few. bottom line is it's a handful

[Capt.Insane-o]

Capt. is that yours??

I'm thinking that a inline seat setup would be alot easier to get around in for old guy like me. Nice eagle!

Yep. Center steer ftw.

[flabum1017]

don't know how much wheeltime you have in large vessels but from my perspective you don't drive a yacht , you finnese a yacht. lot going on there , wind, current. propulsion . just to name a few. bottom line is it's a handful

LOL.... look out the window.... calm waters, clear sky.... he's got the same look on his face as Biden does....................

[JPEROG]

All about airflow and packaging. Hard to beat a "line of sight" path. And the closer you can get the intake valves to the bore centerline, the larger valve you can fit in the chamber.

Early Ramcharger's C/Altered car.



Chrysler used their "longer is better approach ... Lots of down then up then across .. and they did nothing about where it really matters .. the turn just before the valve head.



Conventional BBC head has a low port with a sharp turn ...



Water ports are the same on both heads , but look how much higher the intake port is. 200 -300 more horsepower .. easily. But it does take a very long valve stem hanging out in the port . Makes the head of the valve whip around like a flag on a windy day ..


Even the exhaust side shoots for the moon ...



Yamaha leads the pack in airflow development. Line of site , like the Lambo . Centralized intake valve placement and to keep away from having to "bend the air" around a short side radius , they just put in a third intake valve . A bit ahead of it's time .. Americans have accepted 4-valve heads , even 4 stroke outboards with hokey lookin intake manifolds .. might as well accept the 5 valve as the powerhouse head of choice.



Look how high the port is from the deck , and the angle it assumes . Could easily fit in the valley of a V configured engine , and have a almost "straight down shot".

That 5 valve yamaha head design is 40 years old already. I had them on an 85 maxim X 700 then an 86 FZX 700 S. The carbs were aimed straight down and the motors were leaned forward at 45 degreees. Then they were on the FZ 750 and FZ 1000-the entire 5 valve line up was called Genesis. The exhaust servo was the next year. Yamaha has always been the ground breakers in new technology and bringing new product to the market. They came out with the 1st 4 stroke motor crosser, first 4 stroke snowmobile, first side by side, etc. etc.



Joe