Air flow through hood scoop

[mr0077]

G-Pete, I thought I posted some "real-world" results on this thread early-on, but maybe not. Here you go:

I have a mild 2x4 sideoiler with 2 600 CFM Holleys. The guys in Houston all decide to do a "dyno day". I put mine on it, did two back-to-back pulls and got 394 RWHP with stock paper filters on the S&H housings, and 402 RWHP with just the base of the S&H housings on the carbs (I've been told that without the base of the housing the airflow into the carb gets disrupted).

That makes 7 RWHP difference between paper elements and no elements, up through 5500 RPM. The reason I run paper elements is because the K&N elements let way more fine particles through, and for 7 HP, it isn't worth it.

Now for the guys with one big carb, the single S&H filter seems way too small, but for me, it works. And FWIW, Double Venom's tuft work confirms what I had always suspected, the hood scoop is good looking, but fairly worthless, and any benefit you'd get from cool air by sealing your carb to the hood would be lost by starving the engine for air (at higher RPM). JMHO.

[olddog]

Originally Posted by mr0077

And FWIW, Double Venom's tuft work confirms what I had always suspected, the hood scoop is good looking, but fairly worthless, and any benefit you'd get from cool air by sealing your carb to the hood would be lost by starving the engine for air (at higher RPM). JMHO.

Is the restriction the small air filter you are forced to use by the turkey pan or the scoop?

[davids2toys]

Originally Posted by olddog

Is the restriction the small air filter you are forced to use by the turkey pan or the scoop?

It is definitely because of the turkey pan, not the scoop!
I have had the Turkey pan off my engine, and without it I can put a 14 inch drop down air cleaner that flows over 1000 cfm with no interference to the hood or scoop. I just hated the way it looked. I also had a ram-box fitted to my car at one time and it looked much better, but i did not like the quality of the ram-box chrome finish at that time, so i abandoned the idea, but I plan on re-visiting this idea when I put on the new high flow side pipes, hopefully this year. I did put some pics in another thread at that time on this forum I believe.

[davids2toys]

Here is one of the threads. I did try and post pics, but the size restrictions were to small. I will try to post them again.

If any one wants some pics of my trial fit, send me an email to davids2toys@charter.net

click here for link Has anyone considered something like this for an air cleaner?

[davids2toys]

some more pics