Subject	Upper plenum/manifold question
Posted by	Zeke21 on July 23, 2014 at 3:25 AM
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Message	I've noticed that very late production 96 Z32's have a unique upper plenum. It appears they have a raised bump near each throttle body. Looking at Z32's in Japan after 96 it appears nearly all have the same as well. Anyone know or have any ideas what this is? It doesn't appear there is a part number change beginning late 96 in both the US and Japan databases. This reminds of the headlight glass changing for the USDM Z32's. There's extra fluting in the glass for either 94+ or 95+. No part number change for it either. But I imagine the extra fluting helps reduce glare. So what do these do on the plenum? BTW - I own two 96's and neither have this raised bump on the plenum. My latest build date on one is 03/96.
Follow Ups	Upper plenum/manifold question - Zeke21 03:25:42 07/23/14 My '94tt does not have this feature on the headlight - JMartz 07:21:55 07/23/14 It may have been a late chassis production - Zeke21 11:08:26 07/23/14 My '94tt has 11/93 manufacturing date. (n/m) - JMartz 12:28:01 07/23/14 I believe mine is also 11/93 or 10/93 - ZXRider 12:56:21 07/23/14 I did the 60,000 mile (or 10 years) service aa while - JMartz 17:32:52 07/23/14 Cam Pulley picture, which one do I have? - JMartz 17:46:47 07/23/14 Late, "adjustable" (n/m) - Fast300 22:21:13 07/23/14 Has the be a late production 94. - ZXRider 11:16:11 07/23/14 Looks like they made a spot where it can - 300ZMang 07:59:04 07/23/14 You can also see them on the pic on wikipedia - 300ZMang 08:01:35 07/23/14 PCV Ports on the J30. (n/m) - Stadsport (Nick@CZP) 08:35:11 07/23/14 Actually.. - Stadsport (Nick@CZP) 08:38:16 07/23/14 It was the j30. - TriniTT 09:19:08 07/23/14 You're correct - not PCV by OBD2 related. (n/m) - Bernie (NoVA) 10:28:28 07/23/14 Actually the late production J30 is correct. (n/m) - Bernie (NoVA) 10:27:20 07/23/14 Okay, glad I'm not crazy! (n/m) - Stadsport (Nick@CZP) 00:10:32 07/24/14 Any pics of the difference in headlight glass? - ZXoltan 10:07:21 07/23/14 **NOW im curious** (n/m) - ZXoltan 10:08:02 07/23/14 Here: - Bernie (NoVA) 10:32:06 07/23/14 Got any used driver's side - ZXRider 11:15:05 07/23/14 Yes I do - email me. (n/m) - Bernie (NoVA) 13:05:12 07/23/14 Here: - Bernie (NoVA) 10:35:21 07/23/14 Awesome thank you. - Zeke21 11:07:13 07/23/14 Yep, most likely for cost reduction. - TriniTT 11:31:19 07/23/14 The items got cast in the same molds and then machined - Bernie (NoVA) 13:06:54 07/23/14
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