No fun at all but we had to do it unfortunately.... The wood flooring was flexing and their was water stuck in that under compartment that was seeping out of the wood back by the motor. It's a pain, but gotta be done. One thing after another! :-/


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Well here is the both of them painted and bolted up to the Tunnel Ram. I think they look pretty good.

Looks good Nate.  Just a little constructive criticism, can your upper plenum be turned around so that the carbs sit more level while on plane?  Just thinking that that might cause some float level issues with the angularity of the engine combined with the angularity of the carb mounting surfaces.

Cheers,

Joe

No disrespect also and I don’t mean to take anything away from Nate’s hard work.  It is just a thought.

Indeed Nate put a lot of work into those carbs and I have great respect for those who wrench on their own, particularly those who pay close attention to the fine details.  I just want the best possible outcome from his efforts.

The installed angle of his jet intake (~4 degrees for standard Berk) influences the installed angle of the engine for drive line angularity.  Inherently, the aft end (the flywheel side) of the engine in a jet boat is lower.  In this picture, it seems that the plenum is installed with the angularity of the carb mounting surfaces angling down towards the stern (thicker side forward).  That combined with angle of the engine install will cause the front float bowls to be much higher relative to the rear float bowls.  This may or may not cause a problem.  He might have enough adjustability in his floats that this never causes a problem.  However, if it does, it will manifest itself as a tuning issue in an otherwise good functioning carb.  Ultimately, the carb angle should be level while on plane.  If you take a look at any form of motor sports that uses Holley (and derivatives) carbs, great effort is made to make the carbs level at ride height.  Manifolds are machined with an angle on the carb mounting surface (see red circle).

Again, not trying to take anything away from Nate and I mean no disrespect by stating my observation.  Just thinking an ounce of prevention is worth a pound of cure.  riverrat, you could be completely right also, it COULD be an optical illusion.  Or maybe I just looked at it out of the wrong eye (I can’t see out of one eye).     In reality, I could not tell for sure unless I measured the angle of the carb surface and compared it to the hull planning surface (next to the intake).  The angle of the carbs to the gunwale, deck, floor, etc. is irrelevant.  Just my humble opinion.

Respectfully submitted,

Joe

Yesterday at lake pleasant had one for you horizonjet and bearings gave out on the way home lol

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you know Joe I'm actually glad that we have this forum and we are all respectful enough to share our own opinions and in actuality I learned something I didn't even take into account... the angle of the dangle of the motor nor did I realize that you could turn the intake around 180 degrees. So I just wanted to say thank you for educating me and its duly noted for when I build my first jet boat. I can totally relate to the angle and how it will affect the floats because Im used to doing rock crawling and so forth.. So all in the end I hope nate gets his setup done correctly and had a blast on his boat... Its fun learning from you guys so once again thank you! :-)

V/R
Kevin

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Intakes only go on one way. But the top half of a tunnel ram can be spun around.


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