View Poll Results: Vote on what one you are seriously interested in buying:
I am interested in the radiator ducting
17
9.39%
I am interested in the underpanel/front splitter
34
18.78%
I am interested in both
130
71.82%
Voters: 181. You may not vote on this poll
interest in custom radiator ducting and undertray/front splitter combo?
10-15-04, 09:40 AM
#101
Ramy your getting serous about driving 65mph down in VA man. All that ducting you want to do will totally help you out while avoiding cops going the speed limit! j/k, Damian I have a question for you. My wheel liner is getting warn down and doesn't fit very nicely with the new front bumper I have on. What have you done about this? Do you still just use the stock one, or none at all?
10-15-04, 10:12 AM
#102
Originally Posted by FDNewbie
If you do undertake this daunting task, plz plz PLZ document what you did, and if possible, any manner in which you tested the results (I don't know if you have a wind tunnel readily available lol). But on that note, I know EXACTLY what you mean. I was just reading about this w/ respect to the 2004 911 Turbo... (Damian, wait until you get a load of THIS!):
10-15-04, 10:18 AM
#103
Originally Posted by damian
im not sure what you mean by 'switch' ? i did not have a diffuser on the car before.
if you mean why did i choose this instead of the re pro version i also have (never installed), its because this one works better with the hitch and i like the aero shape of this one better.
if you mean why did i choose this instead of the re pro version i also have (never installed), its because this one works better with the hitch and i like the aero shape of this one better.
10-15-04, 10:34 AM
#104
Originally Posted by Zero R
I'm not sure how the finished product will be but the results should be pretty favorable. I wish I could get a wind tunnel involved!! At this point I have two options the one I stated above with regards to the wheels and the other (which seems feasible with the way I changed everything) is angled back upwards, this was my first choice, but I had a different setup then and couldn't.
As for a wind tunnel...doesn't Mazda have one at their headquarters in Irvine, CA? I wonder if they'd rent it out...(might as well...it's not like there are any Mazdas that are currently being wind tunnel tested lol)
10-15-04, 10:55 AM
#105
1993 RX7 R1
Join Date: Jul 2001
Location: SoCal
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Originally Posted by FDNewbie
generating downforce (not just greatly reducing lift). What was the other setup you were contemplating, if ya don't mind me asking?
Originally Posted by FDNewbie
As for a wind tunnel...
10-15-04, 11:21 AM
#106
Originally Posted by Mr. Stock
"generating downforce" and "reducing lift" are referring to exactly the same thing.
Lift is a force from underneath, pushing upward on the underside of an object, against gravity. Reducing lift would reduce the pressure exterted UPWARDS, thereby lessening the likelihood of the front end lifting up, for example.
Downforce is a force from above pushing downward, in line with gravity. Increasing downforce would increase pressure DOWNWARD, also lessening the likelihood of the car lifting up.
But for example, it's very difficult to generate downforce on the front end of the car. Hence, the method imployed is to reduce lift under the front end. In the rear, however, a spoiler can be employed to generate downforce.
Furthermore, you can have a lot of lift, and a lot of downforce at the same time, and stability would simply be the sum of those two forces. The greater force would win. So I believe they're two very distinct and opposite forces, or say, the same forces, but applied in different directions, both utilized to attain the same goal.
If I'm wrong, my disclaimer is already in the first sentence lol, and please correct me
Wind tunnels are incredibly expensive. To rent one would cost in the thousands if not tens of thousands of dollars per hour.
10-15-04, 01:22 PM
#107
1993 RX7 R1
Join Date: Jul 2001
Location: SoCal
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Basically, net force is what is important.
There may be a force above the car(downforce) and there may be a force below the car(lift). What is important is the net effect of these forces.
For example, if there is a vacuum created under the car causing "decreased lift", the net effect is downforce on the car.
For more on this read this thread
https://www.rx7club.com/showthread.p...6&page=6&pp=15
There may be a force above the car(downforce) and there may be a force below the car(lift). What is important is the net effect of these forces.
For example, if there is a vacuum created under the car causing "decreased lift", the net effect is downforce on the car.
For more on this read this thread
https://www.rx7club.com/showthread.p...6&page=6&pp=15
10-15-04, 03:38 PM
#108
Originally Posted by Mr. Stock
Basically, net force is what is important.
There may be a force above the car(downforce) and there may be a force below the car(lift). What is important is the net effect of these forces.
For example, if there is a vacuum created under the car causing "decreased lift", the net effect is downforce on the car.
For more on this read this thread
https://www.rx7club.com/showthread.p...6&page=6&pp=15
There may be a force above the car(downforce) and there may be a force below the car(lift). What is important is the net effect of these forces.
For example, if there is a vacuum created under the car causing "decreased lift", the net effect is downforce on the car.
For more on this read this thread
https://www.rx7club.com/showthread.p...6&page=6&pp=15
But I think we're on the same page...I agree with you that downforce is nothing other than negative lift, etc...and that net force is what's important. That's why I said:
Originally Posted by FDNewbie
Furthermore, you can have a lot of lift, and a lot of downforce at the same time, and stability would simply be the sum of those two forces. The greater force would win. So I believe they're two very distinct and opposite forces, or say, the same forces, but applied in different directions, both utilized to attain the same goal.
10-15-04, 10:48 PM
#110
Originally Posted by damian
whatever doods, i just want it to look cool ;-)
Yea I figured that much from your other post haha
Originally Posted by damian
if you mean why did i choose this instead of the re pro version i also have (never installed), its because this one works better with the hitch and i like the aero shape of this one better.
10-25-04, 11:15 AM
#111
Hey Damian...lookie what I found! 
(Not exactly a complete pic, but it helps!)
EDIT: Note to self: Might wanna buy optional inserts such as those pictured below, and install on my RE Diffuser Pro...
(Not exactly a complete pic, but it helps!)EDIT: Note to self: Might wanna buy optional inserts such as those pictured below, and install on my RE Diffuser Pro...
Last edited by FDNewbie; 10-25-04 at 11:18 AM.
10-25-04, 12:34 PM
#112
nice find, that pic is sweet
by the hay, here is an update:
The splitter/undertray help up great at a full 2 day event at roadamerica and an event at MAM. I have some tweaks I want to make to the dzus fittings and some other minor changes. Later in the winter I'll get the cost figured out and do some other nose test fittings.
More to come...
by the hay, here is an update:
The splitter/undertray help up great at a full 2 day event at roadamerica and an event at MAM. I have some tweaks I want to make to the dzus fittings and some other minor changes. Later in the winter I'll get the cost figured out and do some other nose test fittings.
More to come...
10-25-04, 07:08 PM
#118
Damian made some prototype brake ducts to bring air directly into the center section of the rotor. It didn't have a 1/8 to 1/4 inch lip and he got raped about it. In the end, the thread did give insight on air ducting issues and Damian was going to incorporate the changes the next go round over the winter.
Did the brakes take longer to fade or with cooler air temps (if that is the case) can you really say it was the ducts?
Back to the regular thread now
Tim
Did the brakes take longer to fade or with cooler air temps (if that is the case) can you really say it was the ducts?
Back to the regular thread now
Tim
10-26-04, 12:42 AM
#121
Originally Posted by FDNewbie
So Damian, you actually made a duct for them? Is there a thread w/ the pics + details? I'm really curious if you found any diff/improvement in brake life etc w/ these ducts??
https://www.rx7club.com/showthread.p...backing+plates
I can tell you this, before i had any ducting the oem porsche rotors would be totally 'spider' cracked up after one event, ...... since the brake ducts were installed i have done roadmaerica (arguably THE hardest track on brakes) and MidAmerica and there are no spider cracks on my rotors, they look great :-)
10-26-04, 01:10 AM
#122
Damian,
I'm gonna read your thread a bit later, but have you considered getting your rotors cryotreated? I got my Brembos cryotreated from Gotham Racing, and they're supposed to be 300% stronger (so cracking shouldn't be an issue), and dissapate heat much more efficiently as well...
I'm gonna read your thread a bit later, but have you considered getting your rotors cryotreated? I got my Brembos cryotreated from Gotham Racing, and they're supposed to be 300% stronger (so cracking shouldn't be an issue), and dissapate heat much more efficiently as well...
10-26-04, 07:20 PM
#125
other than taking a shop'd word for it, how can you tell if somethings been cyro treated? I got burned by Ray at SR motorsports when I took his word for it concerning the upgraded turbos that weren't more than a shitbox with fan blades stuck to a turd. Like cryo treated brakes and rotor housing, et al.
Tim
Tim