Jump to content

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)
geoff

Brake ducts revisited...

Recommended Posts

After seeing the discussion on here I bought a set of the GT3 (non-RS) ducts from Suncoast for my '99 Boxster for about $30 and installed them this past weekend.

$30? Seriously?

Share this post


Link to post
Share on other sites
$30? Seriously?

Yep,that's how much they cost.

wow; for some reason i was under the impression they were like $230. for $30, it's a no brainer.

Share this post


Link to post
Share on other sites
$30? Seriously?

Yep,that's how much they cost.

wow; for some reason i was under the impression they were like $230. for $30, it's a no brainer.

Picked them up last week and installed them today.

Very easy to install and fit great. Enjoy pics...

post-16847-1188969092_thumb.jpg

post-16847-1188969104_thumb.jpg

post-16847-1188969114_thumb.jpg

post-16847-1188969127_thumb.jpg

post-16847-1188969152_thumb.jpg

post-16847-1188969159_thumb.jpg

post-16847-1188969167_thumb.jpg

post-16847-1188969173_thumb.jpg

post-16847-1188969182_thumb.jpg

post-16847-1188969189_thumb.jpg

post-16847-1188969197_thumb.jpg

post-16847-1188969203_thumb.jpg

post-16847-1188969210_thumb.jpg

Share this post


Link to post
Share on other sites

I started this thread and have been remiss in reporting my final results and findings. After driving around with the original brake ducts on one side and the GT3 ducts on the other, and measuring brake temperatures on numerous occasions, I found that the stock ducts keep the brakes slightly cooler in slower driving, whereas at higher speeds and/or more braking, such as driving through the canyons, the GT3 ducts keep the brakes at least as cool or cooler, as measured with an infrared laser thermometer. I can't tell any improvement in braking, but if cooling were an issue, I could always rationalize these as less unsprung weight than swapping in Boxster S front brakes, and a lot less expensive :D

As others have said, installation is pretty straightforward. I found the only easy way to install the brake ducts was to jack up the front of the car and remove the front wheel to get unimpeded access to the duct on the control arm. (It was also a good excuse to break down and finally buy a jack pad)

Here are side by side pictures of the stock and GT3 ducts, with the stock at the bottom and the GT3 at the top

post-84-1192667261_thumb.jpg

Here are the before pictures showing the stock brake duct

post-84-1192666288_thumb.jpg post-84-1192666872_thumb.jpg

and here are the after pictures with the GT3 brake duct in place

post-84-1192666309_thumb.jpg post-84-1192666319_thumb.jpg

For reference, here's a view of just how far down the ducts go. I recently had the ROW M030 suspension installed, and the front of my car now scrapes the bottom of my driveway, but these don't seem to have any problems scraping

post-84-1192666329_thumb.jpg

And last, here's the jack pad I used, which I highly recommend for fit and function

post-84-1192666349.jpg post-84-1192666339_thumb.jpg

Edited by geoff

Share this post


Link to post
Share on other sites

Geoff,

I think that you need to go back and get baselines. You are assuming that under normal conditions your left and right rotor surface temps are the same as a starting point. This is not the case. As observed on other folks cars and my own... My rotor surface temps differ from left to right by as much as 50F using the same ducts on each side. Without before temps and after temps you can tell conclusively anything.

Also: I having been using these 997 GT3 ducts for about 1 year now and am pretty happy w/ their performance on the track.

Edited by pjalexandre

Share this post


Link to post
Share on other sites

I have a set of GT3 RS brake ducts installed on the front of my 986S race car. The picture shows the driver side. You can see how much abuse they have taken - much of the bottom is simply ground away from curbing and the front being raked low. And in the second picture, you can see me holding a regular GT3 brake duct for size comparison. The picture does not show it well, but the RS duct is much bigger....but it is also stupid expensive.

And for giggles, I have attached some images of the rear cooling system we made. We fashioned an aluminum bracket that attaches to the wheel carrier using the holes that existed for the brake dust shield. The silicone aircraft hose attaches to the aluminum tube we made as part of the bracket. The other end is a lightweight, plastic and inexpensive air scoop commonly used with old air cooled 911s for brake cooling. It is screwed onto the aluminum "v" brace. I haven't taken any rotor temps with the new setup, but it is clearly moving a lot of air - the dust accumulation on the wheels is a fraction of what it used to be.

post-26886-0-44942000-1309831259_thumb.j

post-26886-0-36919700-1309831345_thumb.j

post-26886-0-26201300-1309831384_thumb.j

post-26886-0-35323100-1309831405_thumb.j

post-26886-0-30850300-1309831442_thumb.j

Share this post


Link to post
Share on other sites

How aboult the big 996 Cup anyone install theis big ducts?

Somewhat good for smooth race tracks -- not so good on ordinary streets. Street life will be very short.

Share this post


Link to post
Share on other sites

Sonnen Porsche in San Rafael sold me the GT3 non RS ducts for $6.95 ea. and shipped them. They installed easily on my '99 Boxster. I've attached a pic of the right side installed.

post-47594-0-37309700-1309886427_thumb.j

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.