Intake Snorkel Diameter Mod Question

[Yruyur]

I am no expert by far. Would like some input on this.

I have an Airaid that uses the stock snorkel to pull air from inside the bumper. The install manual says for max hp to remove the snorkel. If I were to remove it there would be a small gap allowing air to be pulled from the engine bay as the snorkel inserts itself a little into the Airaid.

I want to use the stock snorkel to pull the air from inside the bumper for more of a cai but found it is bottlenecked at the opening. Measures at 2.7 inches diameter at the opening. Im no expert but if we have a 3 inch throttle body shouldn't the snorkel be the same?

So thinking of cutting the snorkel off and heating and molding the plastic into a velocity stack or adding one while keeping at least a 3 inch diameter.

My first choice is to remove both the chambers and cut at the 3.5 inch line. Not concerned about noise and a tuner should be able to work out any afr ratios issues if any come up.

I know there are after market ones available but im cheap.

Ideas, opinions, suggestions?

Measurements are the diameter based on the outside circumference.

[Kodename47]

Just do it as I'm guessing you will anyway. Shouldn't have any impact on your tune at all though.

But consider this, Toyota/Subaru could have designed it with a bigger opening, so why did they fit it with an "undersized" part? 2.7" is wide enough to cope with more horsepower than our cars will see N/A.

[PSJohnDoe]

You're going to need to talk to an engineer familiar with the mechanics in question but you may not improve performance by cutting it at the 3" diameter mark. There may be a purpose to the shape that you don't understand. I don't know enough about fluid mechanics to say either way, but I'm guessing they aren't randomly drawing shapes on paper and putting them into production.

[IceFyre13th]

Glad my old parts are going to good use, nice meeting you last night too.

[Yruyur]

So I got around to cutting the snorkel. Used a hand saw that took about a minute. The cut is angled down a tad towards the grill. I heated the edges over the stove and curled the ends out to help create a velocity stack. Needs some better sand paper to smooth everything out tonight.

This cut ended up giving me a 3.8 inch diameter.

Sent from a Motorola DynaTAC 8000X

[DJCarbine]

Interesting. I've got a vortech kit that also uses the factory snorkel.... I also have a 3 inch velocity stack laying around.

I wonder if there would be any gains from this

[Yruyur]

Found @2forme was running an extremely similar chopped snorkel. He found more gain via dyno by removing it all together.

http://www.ft86club.com/forums/showthread.php?p=466160

Sent from a Motorola DynaTAC 8000X