Intake manifolds

[speakrdude]

Is there a difference between an intake manifold for a GM 5.7L "inboard" than for an "Alpha" sterndrive? I realize the intake version has to have the wedge that sits under the carb. I can't seem to bolt up this Quadrajet to it. The holes in the front of the carb need to be at an angle.

Is this suppose to be a "High Rise" intake?

Jim

 

[Captain Crispy]

Jim, you are confusing some terms. The 5.7L inboard is the motor. An Alpha sterndrive is the part that hangs on the transom outside the boat.
My last Sea Ray had a Marine Power 5.7L inboard engine with an Alpha 1 sterndrive hanging off the back.

Are you actually trying to find out of there is a difference between the 5.7L engine on a sterndrive boat compared to a 5.7L engine in an inboard boat ?

 

[speakrdude]

Sorry, I made perfect sense in my head.

To me, there are only three kinds of boat/motor combinations.

Inboard- (Weekender-Borg Warner-etc)
Inboard/outboard (the kind with the drive attached to the inboard engine, insert brand of choice) :grin:

And outboard. (just like my Ranger Bass Boat)

Now, The difference, that I am discussing, is between an INBOARD engine and an INBOARD/OUTBOARD engine. The degree of tilt the engine has to mate up to the direct drive shaft on these models. (Yes, I am aware of V-drives and engine with drive shafts that use u-joints. Different story, foe another time)
With that degree of tilt, the carbureated models have a wedge or an intake manifold that holds the carb level so the float will operate correctly.

 

[tobnpr]

Wedge under the carburetor? Never heard of it, but I'm no expert here.
Engine mounting angles aren't all that severe in inboard applications. A few degrees, usually. If more is needed, it's accomplished with a down-angle transmission.

How's it any different than driving a car up, or down, a hill??