Air Resonator?

[iam_dominic]

think i posted this before in the wrong section..opps

any idea what this is and whats its purpose?

[Eug]

i always wondered what that was too...

possibly an emissions sorta thing? i know the turbo cars don't have it and require a charcoal box for importing - but mine didnt need one (charcoal box) so i figured this could have been it?

:confused:

[Greg]

I think it has 2 purposes:

1. reduce intake noises (like a resonator in an exhaust system)

2. provide a reserve of air for the engine to take in should you suddenly floor it

I read an article from a link in a thread on here somewhere that experimented with removing this and replacing it with a straight pipe. The engine lost torque and intake noise was louder with it removed.

[rob82]

I think it has 2 purposes:

1. reduce intake noises (like a resonator in an exhaust system)

2. provide a reserve of air for the engine to take in should you suddenly floor it

I read an article from a link in a thread on here somewhere that experimented with removing this and replacing it with a straight pipe. The engine lost torque and intake noise was louder with it removed.

Its used to stop reversion through the intake system during throttle transients. Its not used to provide a resverve of air for snap throttle. They also used them on all the older XR6's and maybe the 8's cant quite remember.

[skyla]

I have removed the resonator and replaced it with a piece of 3" pipe, on my R33 GTS25, I don't know about the car loosing torque, but without the resonator the induction is quite noisey, when the engine is under load, it kinda screams as it hits 5500rpm.

I'll post up a pic tomorrow of the set up I have got.

[Greg]

Hey Rach - notice any top end gain?

[skyla]

There was a small gain, the biggest difference was in the way the car sounds.

[NA_R33]

the cars loose power wiuthout them, rob82 got it, its to do with the intake pulses.

[skyla]

Here's a couple of pics

[boston]

by the looks of it your car does not have a MAF sensor either..

you running aftermarket ecu?

[skyla]

by the looks of it your car does not have a MAF sensor either..

you running aftermarket ecu?

Correct, AFM was removed when I had the GTS link installed, It now runs off a MAP sensor and TPS.

[iam_dominic]

If the car loses power without one of these - why wouldnt the turbo model include one?

[Greg]

space restrictions?

[NA_R33]

because turbos presurize the intake air, where as the intake air on an NA is sucked through, but not continuosly, it pulses at high frequency, the chamber acts as a damper and smooths the air being drawn through. there was a big right up and tests done a while ago in HPI, different sized ones give different amounts of power and torque, sacrificing power in other areas, and a decrease all round without one.

[mufro]

hey, can ppl who actually have this done please let me know if they have noticed any power loss by going through with this. would b greatly appreciated

[skyla]

I Have done this mod, as I said in an earlier post since then I have had a bit of time and experimented around with it, and after a few back to back road tests there is a loss in torque, not a great deal but still noticable.

With out getting both systems dynoed It's hard to tell which has the better top end power, but with the custom intake the car has awesome induction noise

[mufro]

thanks