c4/ZR-1 Diffuser
Thread Starter
Burning Brakes
Joined: Oct 2001
Posts: 774
Likes: 4
From: It's a Chevy... you can fix it with a hammer.
I finished my diffuser tonight...it looks pretty good. Took pictures, but it was too dark so you have to wait.
fun project...learned a lot about welding aluminum...or aluminium as our brit friends call it
Rick =)
fun project...learned a lot about welding aluminum...or aluminium as our brit friends call it
Rick =)
Race Director
Joined: Dec 2003
Posts: 14,137
Likes: 935
From: Fremont Ca
2022 C4 of the Year Finalist - Modified
Isnt the purpose of a diffuser to guide air from the front of the car,over a smooth belly pan and guide it out the back?I cant see how this is any use on a car that has nothing to clean up the air.But that red car is bitchin.I like the shaved brake light.
3rd Gear
Joined: Aug 2009
Posts: 3
Likes: 0
bad boy diffuser
So Rick did a pretty dam good job for an inbred!
Some of his spool gun mig welds almost represent a tig weld.
Cut out of a single piece of sheet metal with a jig saw and a bunch of noise.
He man'd up and used larger fins - it definitely gives an aggressive look.
Now who want's one? I'm taking orders.
z51 - Have you seen the big gap under the gas tank that leads up to the back side of the rear bumper? That diffuser should save a big amount on drag.
Some of his spool gun mig welds almost represent a tig weld.
Cut out of a single piece of sheet metal with a jig saw and a bunch of noise.
He man'd up and used larger fins - it definitely gives an aggressive look.
Now who want's one? I'm taking orders.
z51 - Have you seen the big gap under the gas tank that leads up to the back side of the rear bumper? That diffuser should save a big amount on drag.
Last edited by yourshitsonfire; Sep 5, 2009 at 12:01 AM.
Thread Starter
Burning Brakes
Joined: Oct 2001
Posts: 774
Likes: 4
From: It's a Chevy... you can fix it with a hammer.
The diffuser will never hit the ground. It's not that low.
Rick
Burning Brakes
Joined: Jul 2002
Posts: 1,050
Likes: 59
From: McLean Va
Done right, it's suppose to create low pressure zone under the rear of the car creating suction and keep the tail down at high speed.
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Thread Starter
Burning Brakes
Joined: Oct 2001
Posts: 774
Likes: 4
From: It's a Chevy... you can fix it with a hammer.
It has been brought to my attention, but I just left them.
The last events that I raced in were the Texas Mile, Big Bend 2007 and Roadrunner 2007...Tech speed at the Roadrunner was 168 and I was there for quite a few miles...as for tires I'm running Vredesteins, so I could switch it back without consequence to the tires.
Thanks for noticing and posting,
Rick
Black powdercoat!
Race Director
Joined: Feb 2001
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From: Manassas VA
NoVa Events Coordinator
St. Jude Donor '14
Melting Slicks
Joined: Mar 2008
Posts: 3,022
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From: Chandler Arizona
although not a corvette, this is a great thread with tons on information.
http://forum.miata.net/vb/showthread...light=splitter
they also happen to be using plastics for the material for these items.
(splitters and diffusors)
http://www.professionalplastics.com/
Thread Starter
Burning Brakes
Joined: Oct 2001
Posts: 774
Likes: 4
From: It's a Chevy... you can fix it with a hammer.
[QUOTE=mnstrlt1;1571414021]that looks great. I think that it's important to understand that there is a science to this (it's not just about slapping sheet metal to the bottom of the car). There has to be a certain angle for the the diffusior to do it's job, and you can also see that the red car as enclosed the 3rd member. Keeping the airflow smooth.
QUOTE]
I certainly realize that...HotRod magazine did an article on some guy in the country providing wind tunnel testing for guys like us...fairly pricey...
Super cool link below. Check it out.
http://www.hotrod.com/techarticles/b.../photo_02.html
Thanks for all the support and replies...I will probably anodize it black later.
Rick =)
QUOTE]
I certainly realize that...HotRod magazine did an article on some guy in the country providing wind tunnel testing for guys like us...fairly pricey...
Super cool link below. Check it out.
http://www.hotrod.com/techarticles/b.../photo_02.html
Thanks for all the support and replies...I will probably anodize it black later.
Rick =)
I like it!!! Let me know if you decide to mass produce them! I'll take one! 
Race Director
Joined: Jun 2004
Posts: 13,957
Likes: 706
From: WI
I notice that both cars do not have a gap between the diffuser and the bumper. The Miata link has several posts about this. Does the differential run hot? Would putting a vent opening in the bumper help?
Le Mans Master
Joined: Oct 1999
Posts: 6,366
Likes: 34
Also dont have the time to read the whole miata link.
