Rear diffuser. Who wants one?
#287075
December 29, 2008 09:03 pm UTC
December 29, 2008 09:03 pm UTC
|
Joined: Jun 2005
Posts: 2,410 cancun mexico(home) now in sca...
manuel salazar
OP
Insane Member
|
OP
Insane Member
Joined: Jun 2005
Posts: 2,410
cancun mexico(home) now in sca...
|
Hey guys, I will start working on Spike's aero, And we know that fooking industry doesnt make shiat for our car. Anyways I found someone that makes universal rear difusers in the states. They go for 299.00 I will be ordering one in a couple of days. The only thing is that the shipping is 145.00 to toronto I have talked to they are willing to work out the shipping if I can get more people. They are made of fiber glass. And here is how they woul look roughly. -Manuel
HTA35R powered, AEM EMS Managed DSM. Muellerized....Sold*.
PT6266 powered, AEM EMS Managed NSX.
|
|
|
Re: Rear diffuser. Who wants one?
[Re: manuel salazar]
#287099
December 30, 2008 01:05 am UTC
December 30, 2008 01:05 am UTC
|
Joined: May 2002
Posts: 2,152 Pickering
Mike Degli Angeli
Insane Member
|
Insane Member
Joined: May 2002
Posts: 2,152
Pickering
|
This stuff has become my newest interest, soo much to know when it comes to aero and how such small things can make such a difference. Balance is very important and an underbelly can make a world of difference in the handling of a car. Manual, remember i told you i had fallen in love with lotus Elises and must own one? Look up pictures of the underside of one of those. Theres is way too much going on under a DSM to achieve that. Get a front splitter, rear diffuser and fab up a belly pan and call it done is what i would do. I got a couple aero books this christmas and look forward to reading them in the next month or 2. Anyone have a wind tunnel i can borrow?
Last edited by Mike Degli Angeli; December 30, 2008 01:06 am UTC.
Never fear a challenge, Amateurs built the Ark, Professionals built the Titanic.
|
|
|
Re: Rear diffuser. Who wants one?
[Re: manuel salazar]
#287120
December 30, 2008 03:46 am UTC
December 30, 2008 03:46 am UTC
|
Joined: May 2002
Posts: 2,152 Pickering
Mike Degli Angeli
Insane Member
|
Insane Member
Joined: May 2002
Posts: 2,152
Pickering
|
hmmmm, i've been dealing with a company in ajax that does cnc sheet metal bending for work. Wonder if they'd be interested in laser cutting some sheet metal for me? Maybe its arts and craft time with a couple sheets of bristol board, scissors and masking tape...lol. The guy that i'm dealing with there seems quite nice and like most fab shops their quite slow these days. Heck, machine shops phone me all the time asking me if i have work for them. Manual, before you get your hopes up, i'm not doing this till my car is up and running hopefully in february.
Anyone ever built an engine diaper? A lot of organizations require them, esecially in drag racing.
Never fear a challenge, Amateurs built the Ark, Professionals built the Titanic.
|
|
|
Re: Rear diffuser. Who wants one?
[Re: Mike Degli Angeli]
#287123
December 30, 2008 04:39 am UTC
December 30, 2008 04:39 am UTC
|
Joined: Jun 2000
Posts: 1,396 Schomberg
Tashko Sarakinov
Serious Member
|
Serious Member
Joined: Jun 2000
Posts: 1,396
Schomberg
|
Lol Manuel. Yeah, probably should get moved since we've hi-jacked your thread. Maybe the discussion will peak some more interest in a GB.
I've slowly started to make <some> progress on my 'aero to-do list' but what I have to get done before April is:
- 1ga composite hood (just started sanding the plug for the mould tonight) - 1g composite bumper/air dam - 1g composite splitter (have the cardboard template ready) - 1ga diffuser - 1g side skirts
The 1g bumper splits the air stream in two locations and only the bottom location, which doesn't provide much real estate, will provide any downforce on a splitter. My feeling is that a 1g splitter will only require a mild diffuser to balance it out.
The other thing I started wondering about how the pitch and roll will affect the function of the side skirts. Once you start letting high pressure air under the car in the middle of high speed turn at maximum compression, are you going to experience a noticable loss of aero grip? Same with accel/decel, the pitch change on the splitter will generate more front grip under braking which will mess up the brake balance at the same time the rear diffuser loses some effect. Under acceleration squat, a flat bottom will trap air under the car and tend to 'lift' it. If you don't put enough rake in your suspension set-up it would be noticable at high speeds depending on your spring rates & power.
Anyway, some things to think about in your sleep.
I'm also waiting on rules for 2009 to be issued for Autoslalom, SoloSprint, SCCA Solo, and CSCS since I have to make sure all my aero mods meet all the requirements.
|
|
|
Re: Rear diffuser. Who wants one?
[Re: Mike Degli Angeli]
#287228
December 31, 2008 02:46 am UTC
December 31, 2008 02:46 am UTC
|
Joined: Jun 2005
Posts: 2,410 cancun mexico(home) now in sca...
manuel salazar
OP
Insane Member
|
OP
Insane Member
Joined: Jun 2005
Posts: 2,410
cancun mexico(home) now in sca...
|
You are so lucky, I am reading about it right now. I will getting one of this pretty soon, I have been looking fordward to installing one this for a while now. http://www.dsmtuners.com/forums/app...7-road-race-engineering-hood-vent-2.html-Manuel P.S, Do you have my bolts?
Last edited by manuel salazar; December 31, 2008 02:47 am UTC.
HTA35R powered, AEM EMS Managed DSM. Muellerized....Sold*.
PT6266 powered, AEM EMS Managed NSX.
|
|
|
Re: Rear diffuser. Who wants one?
[Re: Mike Degli Angeli]
#287231
December 31, 2008 03:23 am UTC
December 31, 2008 03:23 am UTC
|
Joined: Jun 2000
Posts: 1,396 Schomberg
Tashko Sarakinov
Serious Member
|
Serious Member
Joined: Jun 2000
Posts: 1,396
Schomberg
|
Air management is important. I'll have a sample of a part by the end of Jan. which I think you will have left off of your list. I'll let you know when it comes in and you can check it out...it's a simple part. I would wait on making any holes in the hood until after you have done a splitter. I like clean hoods. The splitter (I assume will extend to the front axle line) will create low pressure under the car. The hot air in the engine bay will be drawn down under the car along with air coming in from the sides (hence the reason for side skirts). I think, ideally, your inlet will be drawing in fresh air from outside and not the engine bay. The engine bay airflow will be in through the rad, around the engine, and out down below the car at the trailing edge of your splitter. As long as you can supply enough air to the inlet that it doesn't need to draw on the engine bay air you shouldn't need to cut holes in your hood on a street/track car. Hopefully you won't be seeing high IAT after doing your air management, splitter, and protecting your air inlet from the rest of the bay. The location of a hood cut-out should be based on where the low-pressure zone is. Generally, cars have a low pressure zone about 1/4 - 1/3 of the way up the hood which is caused by the air being pushed over from the front. This is were the string and tape comes in handy. You could find out exactly where to put extraction vents for the most benefit. //edit Just saw Manuel's post...I should start reading DSMtuners every now and then...I had to laugh at the guy that put a SPAL plastic fan in front of his exhaust and melted it. Gee, did he not wonder why the OEM fan on one side is metal and the other plastic?
Last edited by Tashko Sarakinov; December 31, 2008 03:39 am UTC.
|
|
|
Re: Rear diffuser. Who wants one?
[Re: Mike Degli Angeli]
#287473
January 02, 2009 08:56 pm UTC
January 02, 2009 08:56 pm UTC
|
Joined: Dec 2000
Posts: 4,398 Ajax, ON
Reza Mirza
Senior Member, with Far TOO Much Time on Their Hands
|
Senior Member, with Far TOO Much Time on Their Hands
Joined: Dec 2000
Posts: 4,398
Ajax, ON
|
^^ We drive talons, not EVOS, big difference Hmmm, I wonder if this diffuser business is even worth it to make a real noticable difference in a DSM. I mean if I had one on my car, I highly doubt I will even be able to say, "oh yea, feel that diffuser working ?" lol Other than it looking nice, without some professional real world wind tunnel testing and placement, I think its useless. I mean the Supra looks like it can use it as those turds go at pretty high speeds and are tail happy, but on a DSM, for some odd reason I don't think you'll be able to say: "Yup you can certainly feel that diffuser!" Regarding the vented hood and windows foggin up, I think that is less of an issue than people driving their cars around with the heater cores and ducts removed Definatley a great idea, but without REAL testing, I think its useless.
|
|
|
Re: Rear diffuser. Who wants one?
[Re: Reza Mirza]
#287492
January 03, 2009 02:08 am UTC
January 03, 2009 02:08 am UTC
|
Joined: Jun 2005
Posts: 2,410 cancun mexico(home) now in sca...
manuel salazar
OP
Insane Member
|
OP
Insane Member
Joined: Jun 2005
Posts: 2,410
cancun mexico(home) now in sca...
|
Well I guess I should go out and buy wind tunel, last time I checked Suaber were selling theirs. Wrking on aero is not useless, Its like saying that adjusting your suspensions in certain way, wont give you better 1/4 mile times. Everyday and I mean everyday, There is companys racing diferent types of cars from miatas to F1. While the F1 teams and other high end leagues do use a wind tunel. small teams like the ones in the SCCA cant afford a wind tunel and they still use difusers, skirts, splitters and anything that can help the car handle better. How? well they use common sense. Look at this guys, http://www.scca.org/hub.aspx?hub=4You think the can afford a wind tunel? Probably not. -Manuel
HTA35R powered, AEM EMS Managed DSM. Muellerized....Sold*.
PT6266 powered, AEM EMS Managed NSX.
|
|
|
Re: Rear diffuser. Who wants one?
[Re: manuel salazar]
#287512
January 03, 2009 05:34 am UTC
January 03, 2009 05:34 am UTC
|
Joined: Oct 2005
Posts: 10,749 Belleville, Ontario
Ryan Laliberte
No-Lift-To-Shift.... Stock. :)
|
No-Lift-To-Shift.... Stock. :)
Senior Member, with Far TOO Much Time on Their Hands
Joined: Oct 2005
Posts: 10,749
Belleville, Ontario
|
I would definitely be in for a bolt-on type ducting system for the 2G's to direct flow to the Rad/FMIC.
AWDAuto 1996 TSi AWD Automagic12.24 @ 113 - Small 16G FP Green HTA - 11.42/123 Team Pump Gas and Meth RTMRacing - Your Canadian source for DSM Parts "Every moment you live is pregnant with the next moment of your life" --Jim CarreyLast Login: September 28, 2021
|
|
|
Re: Rear diffuser. Who wants one?
[Re: Scott McIntyre]
#287610
January 04, 2009 10:19 pm UTC
January 04, 2009 10:19 pm UTC
|
Joined: Sep 1998
Posts: 7,944 Halifax, NS
Troy Jollimore
Senior Member, with Far TOO Much Time on Their Hands
|
Senior Member, with Far TOO Much Time on Their Hands
Joined: Sep 1998
Posts: 7,944
Halifax, NS
|
On a track like MoSport, or a track where you can get up to a reasonably high speed, the aero (if you can make it light enough and tough enough so that it doesn't come off) could give you an extra few kph through a turn, which can make all the difference in the world if things are close. But if you do it wrong, it could hurt you as much as help... Heh. I still remember the first day I took my 1G to 235kph. Passing through 190kph and the rear started feeling a little squirrelly. Then at 210 or so it just PLANTED it. That's when I thought, "So THAT'S what the rear lip spoiler does..."
|
|
|
Re: Rear diffuser. Who wants one?
[Re: manuel salazar]
#287848
January 06, 2009 03:21 am UTC
January 06, 2009 03:21 am UTC
|
Joined: Jan 2000
Posts: 7,503 Trenton, On, Canada.
Ghislain Goudreau
Senior Member, with Far TOO Much Time on Their Hands
|
Senior Member, with Far TOO Much Time on Their Hands
Joined: Jan 2000
Posts: 7,503
Trenton, On, Canada.
|
Yo MAny.
Did you find a place where we could buy the Plastic Material???
If yes, how much???
Ghislain.
Rouge!!!
|
|
|
Re: Rear diffuser. Who wants one?
[Re: Ghislain Goudreau]
#287850
January 06, 2009 03:24 am UTC
January 06, 2009 03:24 am UTC
|
Joined: Jun 2005
Posts: 2,410 cancun mexico(home) now in sca...
manuel salazar
OP
Insane Member
|
OP
Insane Member
Joined: Jun 2005
Posts: 2,410
cancun mexico(home) now in sca...
|
yO ghix, I did find the plece but if I tell YA, Ill have to kill YA.
55bucks, 4x8' 3.5mm thick. I think I might need something thicker which they have too, thats only what I quoted.
-Manuel
HTA35R powered, AEM EMS Managed DSM. Muellerized....Sold*.
PT6266 powered, AEM EMS Managed NSX.
|
|
|
|
|