Removed Intake Muffler, Sounds great!

[986Roadster]

thank you for the picture. can't i leave it open, why even glue a cup to the end, if it's open anyways. does this make sense. if i get an elblow put on, i am still leaving it open. or am i missing a step. i am pulling the silencer out of the box, so the box is now empty. will i be putting the box back also. dumb questions...i guess when i open, i should be able to figure it out better.

[porsche986spyder]

Originally Posted by 986Roadster

thank you for the picture. can't i leave it open, why even glue a cup to the end, if it's open anyways. does this make sense. if i get an elblow put on, i am still leaving it open. or am i missing a step. i am pulling the silencer out of the box, so the box is now empty. will i be putting the box back also. dumb questions...i guess when i open, i should be able to figure it out better.

No. You are right. If you buy an elbow silicone cupler and also buy an extra clamp, there is no hole left and no need for messing with epoxy or anything like that. Look at this picture. Simply cut the tube at the ribbed part at the end going towards the throtle body and add the new elbow at that end with the new clamp.

[porsche986spyder]

If you buy a silicone elbow and an extra metal clamp, after your install it should look like this.


Most aftermarket cold air intakes kit like the Evo and Trueflow come with these parts deleting the same box alone the intake tube. This is a very simple and inexpensive way to ad a more true air flow pathway to the T.B.

[SinnerDC2]

which website gives the exploded image views?

Thanks
Nick

[porsche986spyder]

Originally Posted by SinnerDC2

which website gives the exploded image views?

Thanks
Nick

None that I know of. I've been making these in Photoshop from the PDF manual that I have on my computer.

[986Roadster]

ahhh beautiful. this helps. thank you so much. i shall try this mod.

[986Roadster]

okay you've helped out this much...i might as well ask one last question.
this new silicone elbow, what is the diameter? what size am i looking for approx!

[blue2000s]

Technically, it's called a resonator. The resonator IS the box, the foam inside is a secondary noise canceling measure. It's typical on most intake tracts. It's function is to capture pressure (sound) waves, bounce them around, and send them back up into the intake plenum 180 degrees out of phase, thus canceling some of the noises coming through the throttle body. It's like a passive version of those Bose noise canceling headphones.

It doesn't effect flow, so removing it will not change the performance of the engine. Removing it can't throw the check engine light.

[CJ_Boxster]

Originally Posted by 986Roadster

thank you for the picture. can't i leave it open, why even glue a cup to the end, if it's open anyways. does this make sense. if i get an elblow put on, i am still leaving it open. or am i missing a step. i am pulling the silencer out of the box, so the box is now empty. will i be putting the box back also. dumb questions...i guess when i open, i should be able to figure it out better.

What my directions say todo is to remove and discard part number 6, 7 & 8 completely...
The Epoxy in the cup will be jammed onto the opening circled in the picture... However once the epoxy is cured abit and almost solid, you peal the 2/3rd size cup off and the epoxy should stay behind stuck onto the opening circled in red.

[renzop]

Is this before or after the air filter? If after than I would be wary of your epoxy plug. If, over time it hardens and cracks, little chunks of epoxy could start heading towards the intake valves. Ugliness and tears would ensue. I think using the elbow makes a lot more sense.

Regards,
Alan

[CJ_Boxster]

Hmmm, i dont know... i dont see that epoxy cracking, i mean nothing touches it, no moving parts either and rated up 2500 psi before point of failure. I can see an airfilter deteriating sooner than the chunk of epoxy but your right about the elbow... does seem safer, But imma stick with the stock elbow its hard inner surface will probably help echo the intake noise alittle better than a softer sylicone elbow.

[blue2000s]

Originally Posted by CJ_Boxster

Hmmm, i dont know... i dont see that epoxy cracking, i mean nothing touches it, no moving parts either and rated up 2500 psi before point of failure. I can see an airfilter deteriating sooner than the chunk of epoxy but your right about the elbow... does seem safer, But imma stick with the stock elbow its hard inner surface will probably help echo the intake noise alittle better than a softer sylicone elbow.

Heat + vibration + pressure from a hose clamp (if you're using one). I'd be looking for a molded plug.

[Topless]

CJ,
Am I missing something here? Is the resonance box just a muffler to reduce intake noise or is it an important part of the factory tuned intake. With a properly tuned intake, sonic waves from the intake pulse combine with airflow to force charge the cylinders as much as 125% of airflow alone. Porsche has been tuning this for a long time to give us better top end power and that nice big fat torque curve that gets us out of corners quickly.

I don't know the answer to this, just raising the question. Tuning an intake/exhaust is a lot more like tuning a musical instrument than we realize. It would be disappointing to remove the res. box and get a narrowing of the torque curve and lose 10hp in the process. Faster good, Slower bad! Any Porsche racing techs in the know on this?

[Lil bastard]

I'm with Topless - obviously missing something here. How does plugging a hole allow more sound to get out?.

Also agree that the airflow characteristics are likely altered. For the better? Worse? That I cannot say. But, the OEM piece is certainly not merely an afterthought by Porsche.

[CJ_Boxster]

Originally Posted by Topless

CJ,
Am I missing something here? Is the resonance box just a muffler to reduce intake noise or is it an important part of the factory tuned intake. With a properly tuned intake, sonic waves from the intake pulse combine with airflow to force charge the cylinders as much as 125% of airflow alone. Porsche has been tuning this for a long time to give us better top end power and that nice big fat torque curve that gets us out of corners quickly.

I don't know the answer to this, just raising the question. Tuning an intake/exhaust is a lot more like tuning a musical instrument than we realize. It would be disappointing to remove the res. box and get a narrowing of the torque curve and lose 10hp in the process. Faster good, Slower bad! Any Porsche racing techs in the know on this?

Well i havent felt a decrease in power at all on my butt dyno but I do feel like ive gotten more power, especially in first gear... this could be placibo effect but if anything, i would say i had a gain.

[blue2000s]

Originally Posted by Topless

CJ,
Am I missing something here? Is the resonance box just a muffler to reduce intake noise or is it an important part of the factory tuned intake. With a properly tuned intake, sonic waves from the intake pulse combine with airflow to force charge the cylinders as much as 125% of airflow alone. Porsche has been tuning this for a long time to give us better top end power and that nice big fat torque curve that gets us out of corners quickly.

I don't know the answer to this, just raising the question. Tuning an intake/exhaust is a lot more like tuning a musical instrument than we realize. It would be disappointing to remove the res. box and get a narrowing of the torque curve and lose 10hp in the process. Faster good, Slower bad! Any Porsche racing techs in the know on this?

This little box is most likely for noise abatement alone. It doesn't have the volume to make much of an impact on the pressure waves of the intake flow.