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997 airbox in 996?

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Old 11-16-2018 | 09:45 AM
  #31  
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Originally Posted by 99 -Norway
Will the 997 3.8 Airbox fit a 996.2, 3.6 (2002) C4S Tiptronic without buying a bracket or moving the airpump?
Will the snorkel from the spoiler have to be the 996 air box snorkel? Sorry for the questions, but could not get at clear answer from this thread.
From my understanding you can use a 3.8L box + 996 snorkel so you don't need to move the pump.

I don't have any experience with it - just what I remember reading.
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Old 11-16-2018 | 04:03 PM
  #32  
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Here's my 2002 C4 Cab, the old one came out and the new one went in, nothing to it.

Old 11-17-2018 | 03:11 AM
  #33  
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What about the resonator? It has a vaccuum actuated flap not? Do you leave it in place? Open closed?
Old 11-17-2018 | 09:11 AM
  #34  
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I chose just to leave it open. Some people have mentioned gluing it shut but it has a strong spring attached to the flap.
Old 11-18-2018 | 05:49 PM
  #35  
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The intake noise is louder if its closed.

You could fairly easily pickup a vacuum line to make it actuate with the revs like the 997
Old 11-18-2018 | 05:54 PM
  #36  
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Unless you have the optional PSE, it is not easy to do on the 996 from what I can tell. The flap in the airbox is controlled by the PSE system.
Old 11-18-2018 | 05:56 PM
  #37  
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Originally Posted by GH996
Unless you have the optional PSE, it is not easy to do on the 996 from what I can tell. The flap in the airbox is controlled by the PSE system.
i Read it was just vacuum actuated? Maybe not then. I recall someone rigging it up - maybe it was to keep it closed
Old 11-18-2018 | 06:18 PM
  #38  
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Originally Posted by dan_189
i Read it was just vacuum actuated? Maybe not then. I recall someone rigging it up - maybe it was to keep it closed
My mistake. It is vacuum actuated but it is electronically controlled through the DME. According to Renntech, it is a 7.8x DME from the 997.2 which of course would not work in the 996 without serious modifications. I have also read where people have glued the flap shut to gain the noise.
Old 11-20-2018 | 09:02 AM
  #39  
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Originally Posted by 99 -Norway
Will the 997 3.8 Airbox fit a 996.2, 3.6 (2002) C4S Tiptronic without buying a bracket or moving the airpump?
Will the snorkel from the spoiler have to be the 996 air box snorkel? Sorry for the questions, but could not get at clear answer from this thread.
How do you sort out the Tiptronic, that need some air, just install a breather on the end?
Old 11-27-2018 | 08:42 PM
  #40  
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My 996 came with a K&N intake...would like to switch to this. Great to know it's a direct drop in. My previous smog inspector gave me a hard time about it, even with the CARB approval sticker on the intake!
Old 11-28-2018 | 01:22 PM
  #41  
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It’s a direct drop , but you may have to loosen the air pump bolts and rotate it ten degrees , takes 15 mins

you might not have to do this if a 996 snorkel is mated to the air box but will if you use the 997 snorkel
Old 12-04-2018 | 11:37 AM
  #42  
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I have started the change now, used 1 hour and not even close to completing. The main screw is hard to fasten, the snorkel bumps into the pump on the left.

will remove the pump and change the angle and see if it fits. So far it's not even close...




Old 12-04-2018 | 03:08 PM
  #43  
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I used the 996 snorkel and 997 box. I found the 997 snorkel didn't fit very well.
Old 12-04-2018 | 04:37 PM
  #44  
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Originally Posted by 99 -Norway
I have started the change now, used 1 hour and not even close to completing. The main screw is hard to fasten, the snorkel bumps into the pump on the left.

will remove the pump and change the angle and see if it fits. So far it's not even close...

My personal experience is you won't be able to fit a 3.8 airbox on a 996.2 unless you relocate the SAI bump (an inch or so to the left) with a custom bracket (such as the one from EVOM). You may be able to fit the airbox using a 996 snorkel but I have not tried so can't confirm.
Old 12-04-2018 | 05:28 PM
  #45  
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Where are you guys finding 997 airboxes?


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