[jmwilso2]

Originally Posted by JackandJanet

kingcon41 - That's nice work, BUT (Don't you hate that word? I know I do, but here's my concerns, and I'm an engineer, so I'm looking at this from that standpoint.)

First, putting the intake low and unshielded means water will easily be thrown in there, possibly by other vehicles ahead of you in a heavy rainstorm. I know there is a pretty good vertical rise from the inlet, but I think with the flow velocity at running RPMs you really risk pulling that water into the engine. It would probably destroy it.

Second, even if it is dry, that "scoop" is going to pull all sorts of crud up into the air filter, since it's down low where it will suck it all up. The filter will protect your engine in this case, but it will probably get clogged up much sooner. As an aside - I used to fly the A-37B attack jet in the Air Force. The inlets for the engines were so low, we had screens that came up and covered them during ground operations, to keep junk out that would destroy the compressor blades. I think you risk the same kind of damage here, since that inlet is wide open.

Third, you are not really going to get much of a "ram" effect unless you are at highway (70+mph) speeds. Even then, I don't think the "ram" effect is that significant. Bill posted on this several months ago, and said something quite similar.

So, my advice to you is to route that intake out into the fender well. It is protected there, very little chance of bad stuff being sucked up into the engine and it is away from engine heat. If you can find another place that has the same properties, that's fine too. And, you could even increase the hole in the fender wall if you wanted to run a bigger pipe into it. But, the smallest diameter of your intake system is the real "choke point". Putting a bigger tube before or after that segment will have little effect. The stock tube has a minimum diameter of about 3 inches. I think you really just want to extend that into a "cool intake area" that is protected.

And finally, I would NOT cut off the resonators. They may actually help smooth the airflow into the engine (increasing it) by eliminating pressure waves that can interfere with the flow you are wanting to increase. I know, many people think they look funny, but if you get "drone" after cutting them off, I can almost guarantee you have hurt the airflow into your engine.

These are just my thoughts, of course. Please don't think these ideas are "gospel". As always, I welcome any opposing views.

- Jack

I dont have nearly the experience Jack does but I fly for a living and have some engineering experience and I'll second all of the above. Even with the 3 way connector there is still going to be a pile of airflow going up that tube which could carry water with it. Pressure differential isnt the issue. Its the fact the air and water are moving fast, rain will fall side ways and even upwards of the wind is blowing hard enough and in the right terrain. And the 3 way definitely doesnt solve the dirty filter issue.

Joe