Subject	I always assumed they were there to suppress vibration.
Posted by	Jim (Selin Design) on June 27, 2011 at 7:25 PM
	This message has been viewed 213 times.
In Reply To	Any negatives to deleting the two ears off the sides of the posted by ZiNnYc on June 27, 2011 at 02:30 PM
Message	Without those mounting points the plenum would have a "flapping wings" vibrational mode. FWIW, I googled "intake plenum vibration" and this was among the hits: La-Z-Link It seems plausible that structure borne vibrations could interfere with flow path harmonics but I cant vouch for sure. At a minimum everything that connects to it would be subject to a more powerful vibration spectrum. www.selindesign.net
Follow Ups	Any negatives to deleting the two ears off the sides of the - ZiNnYc 14:30:10 06/27/11 I prefer to have those brackets in place, even with the - Guapo 14:36:32 06/27/11 2nd (n/m) - Drk93TT 15:15:11 06/27/11 I just don't see how pulling it will put any stresses - na300zx (OH) 15:55:44 06/27/11 Are you referring to the places where the brackets - na300zx (OH) 14:44:54 06/27/11 Yes...have you pulled the motors? (n/m) - ZiNnYc 15:06:30 06/27/11 Yes. I use the Ramey sling too (n/m) - na300zx (OH) 15:52:56 06/27/11 Keep a spare plenum for pulling/dropping engine. - 90GoldZ 14:55:44 06/27/11 im looking for empirical evidence that says thats required. - ZiNnYc 15:05:24 06/27/11 Remove turbo outlet pipes, attach brackets..DUH - 90GoldZ 15:22:44 06/27/11 Thanks (n/m) - ZiNnYc 15:46:13 06/27/11 Personally, I am keeping them for the brackets. - BoneZ 15:04:08 06/27/11 For what it's worth, I've pulled/installed a motor without - Stadsport (PHX) 15:29:39 06/27/11 I've pulled, and installed my motor with auto-trans attached - Barry (NJ) 16:40:05 06/27/11 Really, that's good to know! (n/m) - Stadsport (PHX) 01:52:52 06/28/11 Theyre coming off. Thanks for the input guys (n/m) - ZiNnYc 15:47:02 06/27/11 I leave them to support the upper plenum. (n/m) - Bernie (NoVA) 17:30:36 06/27/11 I always assumed they were there to suppress vibration. - Jim (Selin Design) 19:25:10 06/27/11 Agreed on the vibration suppression. - Dave N 19:31:49 06/27/11 I would like to see a picture of that manifold - ZiNnYc 20:12:43 06/27/11 In that post they say the intake plenum is connected to the - ztunerz 22:21:24 06/27/11 Goddamit Hari, yay or nay! (n/m) - ZiNnYc 06:36:45 06/28/11 What do they hurt that you are so hell bent on deleting them (n/m) - Bernie (NoVA) 08:51:07 06/28/11 They and the brackets take up space with larger pipes. - ZiNnYc 10:41:51 06/28/11 Just installed 2.5" piping, the brackets clear just fine. - vorpalZ 11:26:18 06/28/11 I didnt say they wouldnt clear, just would rather not have - ZiNnYc 11:32:12 06/28/11 Which pipes are you worried about scratching? Ones that are - Inzane 11:51:01 06/28/11 Yes (n/m) - ZiNnYc 11:56:21 06/28/11 yup, full install. Bolted down the plenum and installed the - vorpalZ 12:23:37 06/28/11 Trim the boost-solenoid mounting tabs off the brackets - Barry (NJ) 16:59:55 06/29/11 Spring loaded bolts? (n/m) - 90GoldZ 06:43:48 06/28/11 Studs/bolts that secure the lower plenum to the heads are - Bernie (NoVA) 00:07:39 06/29/11 Thats a good thought... - Jim (Selin Design) 10:07:42 06/28/11 I don't have the best eyes in the world..BUT - 90GoldZ 20:28:46 06/27/11
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