Subject	Here's my 2 cents
Posted by	shirow on January 20, 2004 at 11:55 AM
	This message has been viewed 227 times.
In Reply To	Rear Air diffusers posted by cheezoto(torque GOD!) on January 20, 2004 at 10:17 AM
Message	I think everyone's guessing at this point, there's no data saying it will or will not work. Theoretically anything you can do to reduce the overall drag coefficient will help, but whether it's practical or worthwhile (bang for buck) or the added weight negates the benefit, those are the unknowns. I'd recommend you build some prototypes, and do some wind tunnel testing. If you can't afford wind tunnel time, the next best thing is to test it out on the drag strip. However, your gains may be so minimal that it will be masked by the inconsistency of the driver for each run.
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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