Subject	actually a hole can create drag.
Posted by	Marshall on January 20, 2004 at 12:09 PM
	This message has been viewed 199 times.
In Reply To	please explain to me how a hole will increase drag? posted by genic on January 20, 2004 at 11:40 AM
Message	I'm not saying that the holes in this particular part increases drag, but I am saying that it is possible to create more drag on a part by putting holes in it and letting the air go through it instead of around it. While the air could have smoothly gone around the part, a hole would enable the air to pass through it turbulently.
Follow Ups	Rear Air diffusers - cheezoto(torque GOD!) 10:17:25 01/20/04 I see little to no practical gains from it. (n/m) - YugoBernie (NoVA) 10:21:00 01/20/04 uh how about reduced drag - cheezoto(torque GOD!) 10:23:23 01/20/04 I see little to no practical gains from it. (n/m) - ZEngineer 10:25:37 01/20/04 I'm sure keeping your car waxed will produce similar results (n/m) - JRH(KY) 10:32:19 01/20/04 You're probably joking, but that has some merit... - scottwerks 12:09:14 01/20/04 same reason swimmers shave body hair and wear swim caps. (n/m) - NC-Z 15:56:29 01/20/04 I thought they did that just to be sexy! LOL! (n/m) - scottwerks 16:00:53 01/20/04 Damn it Bernie has spoken! - PiotrC70 11:15:33 01/20/04 you people are idiots - genic 11:18:03 01/20/04 Get a jumbo wing, has the same qualities (n/m) - YugoBernie (NoVA) 12:14:36 01/20/04 Get an HID kit!!? - cheezoto(torque GOD!) 11:30:35 01/20/04 My turn. - Kenny 11:33:52 01/20/04 you are right - cheezoto(torque GOD!) 11:37:50 01/20/04 Take a Chill Pill, man! (n/m) - scottwerks 11:41:30 01/20/04 midol blowdart ... relaaaaxxxxx ... - Guapo 11:47:41 01/20/04 I'll say this nicer since my previous post was removed. - PiotrC70 12:36:09 01/20/04 My Z weighs 3250 with a half tank of gas - cheezoto(torque GOD!) 17:51:43 01/20/04 I agree w/ what you're saying. - PiotrC70 19:58:55 01/20/04 If that's your goal then why stop @ just the rear? It would - YugoBernie (NoVA) 12:19:42 01/20/04 it seems like once a week now someone asks about - JC_NS 11:34:13 01/20/04 i dissagree. - Halo Z 11:34:41 01/20/04 f-ing dhu (n/m) - genic 11:36:27 01/20/04 bout time one of the Vets steps in - cheezoto(torque GOD!) 11:39:17 01/20/04 100% agree. This thread, unfortunantly, has become pointles - nixit 11:41:35 01/20/04 TVR Cerbera Speed 12? - BigTDogg (MA) 12:55:46 01/20/04 no... 3' feet short forward (towards the front of the car) (n/m) - nixit 13:03:32 01/20/04 Hmmmm....scratches chin... - BigTDogg (MA) 13:15:23 01/20/04 :sigh: nevermind... - nixit 13:25:15 01/20/04 No it's not, - BigTDogg (MA) 13:35:26 01/20/04 They need to extend towards the front, extending more - Chris(NJ) 20:15:13 01/20/04 Yeah, I'm going to snag a fluid dynamics book to see - BigTDogg (MA) 12:19:44 01/21/04 agreed (n/m) - Spee 14:02:44 01/20/04 I saw an EVO 8 with holes cut everywhere in the bumper in... - Stealth021 10:26:26 01/20/04 thats exactly what i dont want.... Ghetto (n/m) - cheezoto(torque GOD!) 10:30:37 01/20/04 I think it works if you're - s3trios 10:27:48 01/20/04 hold a plastic bag out the window going 60mph - cheezoto(torque GOD!) 10:35:40 01/20/04 True, but then again - s3trios 11:16:25 01/20/04 Well, the Z has a CD of .32 - cheezoto(torque GOD!) 11:36:39 01/20/04 Just lower your ride, you'll be fine - Nizmo600z 10:29:47 01/20/04 air is going to pass under the car no matter how low it is - cheezoto(torque GOD!) 10:31:59 01/20/04 Not at normal legal speeds, the effects would be minimal (n/m) - BigTDogg (MA) 10:33:37 01/20/04 Oh really? and thats why people put them on autocross cars - cheezoto(torque GOD!) 10:39:30 01/20/04 Ok dude, did you post to start a flame war or get info? - BigTDogg (MA) 10:44:00 01/20/04 i started this post 2 get info about constructing a diffuser - cheezoto(torque GOD!) 10:49:16 01/20/04 Not trying to flame you..... - Nizmo600z 10:53:18 01/20/04 its not stupid, waste of time, or whatever..if so ..then y - genic 11:03:42 01/20/04 I never said it wasn't beneficial - Nizmo600z 12:15:13 01/20/04 baahhh... - MaxBoostTT 10:56:20 01/20/04 You drive a VAN! - EricTTZ 11:07:02 01/20/04 every opinion counts (n/m) - genic 11:08:11 01/20/04 some greater than others (n/m) - EricTTZ 11:08:50 01/20/04 how so? (n/m) - genic 11:09:44 01/20/04 Educated opinions will always carry greater weight. (n/m) - Kenny 11:17:19 01/20/04 Unless the other guy has his finger on the trigger. (n/m) - hoss 11:24:52 01/20/04 LOL! (n/m) - Sweep 12:38:33 01/20/04 hoss, you are one of the coolest members. (n/m) - Stealth021 17:57:07 01/20/04 Re: You drive a VAN! - MaxBoostTT 11:30:44 01/20/04 You're a Meche student right, If you have some mech ability, - BigTDogg (MA) 11:05:38 01/20/04 Look at this car - cheezoto(torque GOD!) 10:58:26 01/20/04 I've seen those cars before, I was on my school's team - BigTDogg (MA) 11:10:27 01/20/04 ever hear of vacuum? (n/m) - genic 11:13:39 01/20/04 2nd... on another note, unless you plan to build yours out - PiotrC70 11:34:59 01/20/04 agree'd - genic 11:37:39 01/20/04 They showed enough proof to win the design competion - cheezoto(torque GOD!) 11:20:37 01/20/04 Again, that is a full length diffuser system, not just under - BigTDogg (MA) 12:49:25 01/20/04 Glad to see another FSAE'er on the forum... - therin (Plum) 11:10:37 01/20/04 wow, the judges must have changed a lot... - TagZ 11:29:27 01/20/04 they will rip you if you cant explain your design - cheezoto(torque GOD!) 11:33:19 01/20/04 oh I know, we always did really well in design... - TagZ 12:20:41 01/20/04 damn...2nd place? - aliaZ 12:17:00 01/20/04 that's cool... - TagZ 12:32:01 01/20/04 my favorite pic while I was on the team... - TagZ 12:36:19 01/20/04 nice pic :) (n/m) - aliaZ 22:28:15 01/20/04 we had a long drive to competition... - TagZ 11:50:45 01/21/04 no much you can do - Nizmo600z 10:34:13 01/20/04 The way I understand it.... - kayoz 10:58:50 01/20/04 Re: Rear Air diffusers - Scott (NC) 10:34:18 01/20/04 yeah, i had somthing like that in mind - cheezoto(torque GOD!) 10:37:47 01/20/04 you will probably need to fab some sheet metal plates - genic 10:53:49 01/20/04 what i was thinking - cheezoto(torque GOD!) 11:07:24 01/20/04 I understand your point and your posts, but I have to - PA_Z 11:06:49 01/20/04 well its kinda like pulling the spare tire out of the car - cheezoto(torque GOD!) 11:11:43 01/20/04 would probably be more effective to remove side mirrors, db. (n/m) - junxster 11:09:23 01/20/04 you think he wants to save .2 off of his quarter mile times? - genic 11:12:09 01/20/04 re-read his message - junxster 19:56:57 01/20/04 Pentroof rear diffuser...this is what you're looking for - Chris(NJ) 11:15:58 01/20/04 oops,..forgot the last link...inside - Chris(NJ) 11:17:23 01/20/04 yikes! - cheezoto(torque GOD!) 11:22:54 01/20/04 that's not a diffuser. that's a drag increaser. - JC_NS 11:36:56 01/20/04 please explain to me how a hole will increase drag? - genic 11:40:34 01/20/04 actually a hole can create drag. - Marshall 12:09:34 01/20/04 symantics (n/m) - genic 12:23:15 01/20/04 here's my point, though: - Marshall 12:39:41 01/20/04 wearing it or not wearing it? i only wear them :( (n/m) - genic 12:43:14 01/20/04 What kind of cone? - therin (Plum) 12:54:56 01/20/04 here's the link: - Marshall 14:12:05 01/20/04 every hole creates a vortex behind it. If it is improperly - JC_NS 13:01:09 01/20/04 This is kinda what your looking for right? - OmahaZ 11:21:47 01/20/04 yeah getting there - cheezoto(torque GOD!) 11:25:17 01/20/04 Here's my 2 cents - shirow 11:55:33 01/20/04 easier and cheaper. (1 cent?) - SactoTodd 12:04:51 01/20/04 very good idea. - nixit 12:09:23 01/20/04 Don't begin to think I thought that up by myself. - SactoTodd 12:11:10 01/20/04 All that magazine reading pays off! (n/m) - shirow 12:14:38 01/20/04 define "reading" (n/m) - Guapo 12:18:22 01/20/04 non-popup picture books or centerfolds (n/m) - genic 12:23:47 01/20/04 Working definition: - therin (Plum) 12:43:53 01/20/04 I think you just restated what we all said. (n/m) - PA_Z 12:22:57 01/20/04 learn to deal with criticism... - RaBBiZ(philly) 12:15:08 01/20/04 It looks like this - ZBlacktt 13:13:37 01/20/04 Holy high wings, Batman! Any more pics of these cars? (n/m) - Arnel(Z32R.com) 13:24:21 01/20/04 Out of sight, out of mind - scottwerks 15:41:11 01/20/04 Cheezy you fag, you've been listening to Louis?? (n/m) - J-Z91(OH) 01:15:57 01/21/04
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