Has anyone deleted the resonator in the stock airbox? or made a larger snorkel?

[Craig]

Originally Posted by vtmike

Nice, I'm hoping to dyno my car soon. I have the perrin inlet hose, drop in filter, nameless downpipe, and axleback. Thinking about seeing if I can increase the seal between the air box and snorkel. Seems to be some room for improvement there. You have any pics of your snorkel?

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Not on me currently. I have design sketches but I'm going to keep those to myself. Safe to say it resembles a squashed cowbell. Currently waiting for our design to get polished a bit before we post anything.

[driftartist]

almost a year released and already people are going to be their own cause for throwing codes. there will be a new section for trouble codes in no time. are you all automotive engineers? what did and toyota and subaru overlook where your divine knowledge realize their fault? oh wise men what can we do to fix these ignorant engineers horrible design? just curious.

[sw20kosh]

Originally Posted by driftartist

almost a year released and already people are going to be their own cause for throwing codes. there will be a new section for trouble codes in no time. are you all automotive engineers? what did and toyota and subaru overlook where your divine knowledge realize their fault? oh wise men what can we do to fix these ignorant engineers horrible design? just curious.

No codes for anything in front of the MAF.

Some people like loud intakes. Resonators quiet down the intake. Said people rip them off and plug the holes. Ya don't need to be an engineer.

It is the same thing as installing a louder exhaust.

[vtmike]

Originally Posted by driftartist

almost a year released and already people are going to be their own cause for throwing codes. there will be a new section for trouble codes in no time. are you all automotive engineers? what did and toyota and subaru overlook where your divine knowledge realize their fault? oh wise men what can we do to fix these ignorant engineers horrible design? just curious.

I'm an engineer by trade, and there are lots of others on this forum of all different disciplines. An engineer designed my nameless exhaust. An engineer designed my perrin inlet hose and did testing to find out that the resonators do nothing but effect sound coming from the sound generator. I prefer to reduce what ever weight I can, especially up front if all it is doing is creating sound in the cabin.

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[sierra]

Originally Posted by Kodename47

My current setup is no resonators what-so-ever, all holes smoothed off but with the noise pipe still in place. I might dyno test with/without main resonator and the "bulb" one under the intake pipe. My dyno guy is away at the moment and I'll wait until my updated flash arrives. I'd bet the difference is so minimal though.

You might be the only one to remove the resonators and keep the sound tube.
Did you notice any difference in the sound being piped to the driver?

[Cade01]

I had one of my plugs behind the MAF fall out(into the engine bay not the intake) and it didn't throw any codes for the 30 minutes or so I had to drive it, it wouldn't idle at all but no CELs. I promptly made a better plug when I got home.

[sw20kosh]

Originally Posted by Cade01

I had one of my plugs behind the MAF fall out(into the engine bay not the intake) and it didn't throw any codes for the 30 minutes or so I had to drive it, it wouldn't idle at all but no CELs. I promptly made a better plug when I got home.

Ensure that this does not happen guys.

In this scenario you would be sucking in un-metered air which would cause a lean state (the MAF doesn't "see" that air and doesn't compensate by giving fuel). Lean state will blow your motor.

[Kodename47]

Originally Posted by sierra

You might be the only one to remove the resonators and keep the sound tube.
Did you notice any difference in the sound being piped to the driver

It wouldn't surprise me if I was I reckon it would give the TRD red sound changer a run for it's money. It's loud on full throttle but not too bad otherwise. I really like the sound. It's what I was after by doing this but not at the expense of performance or drivability.

[sierra]

Originally Posted by Kodename47

It wouldn't surprise me if I was I reckon it would give the TRD red sound changer a run for it's money. It's loud on full throttle but not too bad otherwise. I really like the sound. It's what I was after by doing this but not at the expense of performance or drivability.

That's good to know. I had wondered if they had tuned the sound with the resonators to get the right tone but if it sounds good they must have been targeting the loudest frequencies just to make it quieter.

[Cade01]

Originally Posted by sw20kosh

Ensure that this does not happen guys.

In this scenario you would be sucking in un-metered air which would cause a lean state (the MAF doesn't "see" that air and doesn't compensate by giving fuel). Lean state will blow your motor.

Yep, babied it all the way home and the temps stayed down, definitely not good though. What happened is I used an expanding plug and it squished out of the tube, so I put the plug back in and put a cap over the top of that and then hose clamped it so it won't pop back out.

[Kodename47]

Originally Posted by tennisfreak

According to this: http://www.ehow.com/info_12156112_ai...onator-do.html

Resonator boxes serve a real purpose and can have a negative impact if you remove them.

Not sure I want to get rid of mine for no reason.

I have spoken to my dyno man and when he's back from holiday we will test a multiple of configs:
- As it is (no resonators at all)
- Just main resonator
- Just pipe resonator
- Both back in

The noise pipe will stay connected and I'm going to leave the snorkel without the resonators attached and interior smoothed. I'll post up the findings in here when I get some.

[Craig]

Originally Posted by driftartist

almost a year released and already people are going to be their own cause for throwing codes. there will be a new section for trouble codes in no time. are you all automotive engineers? what did and toyota and subaru overlook where your divine knowledge realize their fault? oh wise men what can we do to fix these ignorant engineers horrible design? just curious.

This would be why I haven't posted much info.

I'm working with an engineer actually yes, I'm the one with the idea/hands he's the one with the brains making sure it actually solves the problem.

There would be no aftermarket for cars if cars came out of the plant perfect. There's no problem with the stock snorkel, that doesn't mean it cannot be improved. If you don't like the idea/aren't interested don't buy the products - you also don't need to come on the forum and bash others for trying though.

[Turdinator]

My max racing duct arrived
Will do write up once it's installed.




P.S. the importer I got mine from brought in an extra four ducts to improve the freight cost just invade anyone wants one.

[Nezz]

I'm gonna be quick and blunt here. It's a shame Xanatos jumped out earlier, I'm pretty sure he knows what's up, too.

Race cars are not street cars are not race cars. The Griffin spends its life at full throttle and above 5,000 RPM where intake pulses start to melt into a flow, and its intake is designed to be as direct as possible for maximum flow under power. Out in the real world where we are, we're on all sorts of partial throttle and at low RPMs pretty frequently (deny it if you like, but it's true).

Resonators of about that size placed in the intake are there for more than just looks. They're somewhere for intake pulses to bounce after they come off a closed intake valve and go back down the pipe. Look at how it's placed perpendicular to flow, in the natural spot for the pulse to bounce across the airbox. As for the ones on the snorkel, I wouldn't be surprised if they're noise related, or even just to catch moisture and give it somewhere to safely evaporate. But the resonator hanging off the airbox?

S13 Silvias come with one of those in a similar (but not identical) configuration. The one on my Silvia Qs had its one fully deleted by the previous owner-- I got the parts in a box. Putting them back on did make the car quieter, but it also stopped the grab I got going from second gear to third under partial throttle and improved response (When you have a flywheel less than half of stock weight I think you can judge it fairly effectively) at low RPMs and partial throttle under load.

THIS WILL NOT, and I mean NOT reflect on a dyno. A dyno is a full power run. You'll see "gains at the top end", unaware that the 'gains in the midrange' are being eaten by the detriment of this effect. Yes, you're giving purer airflow. Is it always a good thing? Hell no.

My two cents. Don't keep up with all the "noise" crap, resonators resonate-- Resonation means more than just noise and vibration. Take the resonators out of an exhaust and watch what happens to your exhaust pulses bouncing off the muffler...