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Though based on some other posts above, it sounds like it might make sense to consider the fins a disposable item, as front lip spoilers sometimes are. In that case, a more disposable material might be the best choice. I don't know what Porsche used for their cup spoilers, but as they apparently sold for as little as $100, it was probably a good choice.
^^^
This. so much obsession with carbon fiber, where simple hard plastic which can easily be replaced is better suited for the job... especially when it comes to a diffuser, on a car which can be used on the road furthermore. for example, vorsteiner makes a great carbon fiber gt4 kit with splitter, skirts and diffuser extension... except it's too nice to use to track, and useless on the road. Make it plastic and now it can look nice on the road and disposable enough for the track.
But all jokes aside.. you don't see a bit too much koolaid drinking on our forum?.. a little more critical perspective and less blind love of the brand and its very calculated strategies would do good I think.
Most eventually come around to reality. Just take longer for some than others...
I'm guessing you mean R style only, no? Last I checked, people with a R already have a diffuser ... .
If you mean 991 only, that's a shame. There's plenty of people buying 996 and 997 performance parts. And while there are big, standard diffusers available which hang out the rear and are hardly suiteable to something driven on the street, as well as small, purely cosmetic diffusers, if you had an R style diffuser, you'd be selling something unique. Though obviously making something as close as possible to the R diffuser for the 996 or 996, instead of merely copying the R for other 991s, would require more time & ingenuity.
^^^
This. so much obsession with carbon fiber, where simple hard plastic which can easily be replaced is better suited for the job... especially when it comes to a diffuser, on a car which can be used on the road furthermore. for example, vorsteiner makes a great carbon fiber gt4 kit with splitter, skirts and diffuser extension... except it's too nice to use to track, and useless on the road. Make it plastic and now it can look nice on the road and disposable enough for the track.
Fully agreed. I'm ready to pay for carbon fiber on my car, but not for splitters, skirts, and bumpers unless it's something quite different from the stuff used for doors and frunk lids and is actually the best material for the job.
My diffuser got damaged during delivery transport. Not sure if it happened in Germany or here in USA. When my dealer was performing the PDI and was put on the lift, the first thing I looked at is the diffuser. The left two fins were scraped. PORSCHE knows about it and I still await the arrival of the replacement part having taken delivery of my 911R first week of November. On another post, Footsoldier has the same damage.
While the hard plastic is cheap and easily replaceable, it would still be nice to have a carbon fiber diffuser. Here is a side picture shot of the 911R hard plastic diffuser as many of you have already seen.
On the other hand, my 2017 Viper ACR-Extreme 1:28 the main diffuser panel is made of carbon fiber and the "extensions" are made of hard plastic bolted on the the carbon fiber main panel diffuser. The distance/gap of the lowest point of the hard plastic carbon fiber to the ground is about three inches for the Viper.
Drive safe,
GT3RS-Fan1
Last edited by GT3RS-Fan1; 01-08-2017 at 02:01 PM.
I wonder if an R would run hotter with the bigger, closed plate.
The manual gearbox probably needs less cooling but still, could be an issue specially if you install a more aggressive diff.
The adjustability of the LSD being the one thing that could have an R increase performance over an RS.
^^^
This. so much obsession with carbon fiber, where simple hard plastic which can easily be replaced is better suited for the job... especially when it comes to a diffuser, on a car which can be used on the road furthermore. for example, vorsteiner makes a great carbon fiber gt4 kit with splitter, skirts and diffuser extension... except it's too nice to use to track, and useless on the road. Make it plastic and now it can look nice on the road and disposable enough for the track.
SPOT ON!! Exactly why I never understand when I see GT3s/RS's with all the black plastic items replaced with CF. Don't get me started!!!
Of course, plastic might be just as good. Two cautions. First, a carbon fiber part can be made 50% lighter than plastic (depending upon how the plastic is done). For example, I just looked at the two induction plenums for the R and RS and have no doubt that at least 50% of the weight can be removed. Second, it might actually be less expensive to make a tool from which to make a carbon part than make a tool to injection mold plastic. So, if you only need a small number of parts, carbon fiber might actually be cheaper.
Good morning Robert. Regarding your question, I called my Porsche dealer and they informed me the part number for the damaged rear diffuser for my 911R is 991505811901E0. The cost is $250.00 according to the parts department which I find very cheap or is in error. I will verify when my replacement diffuser arrives. Hope this helps.
If the question is for my 2017 Viper ACR-Extreme 1:28, the Carbon Fiber (CF) tray was first introduced in 2016. I spoke to the dealer owner and inquired how much this CF tray would cost and he said it is so new it is not in the parts catalog yet. The hard plastic replacement fins however are $500.00 for the whole set (six pieces/fins not four as originally written, four foot length).
Lastly your thread on "911R Weight Reduction" is awesome and kudos to your research efforts. If I am not asking too much, I'd be interested on some of those 911R products such as:
1.) CF Engine Compartment Lid
2.) CF Retractable Rear Spoiler
3.) CF Side Skirts.
4.) CF Front Bumper Lip
5.) CF Rear Bumper Lip
Please PM me the associated costs for the five items above I have interest in. Thank you.
Drive safe,
GT3RS-Fan1
Originally Posted by Robert Linton
How cuch does the under tray with the defuser cost?
Last edited by GT3RS-Fan1; 01-15-2017 at 06:06 PM.
Reason: Typo correction on the number of fins (6 instead of 4) for the Viper ACR-Extreme
SPOT ON!! Exactly why I never understand when I see GT3s/RS's with all the black plastic items replaced with CF. Don't get me started!!!
+1
I owned a 2010 ZR1 for several years, busted 3 CF front splitters.
When the C7 Z06 came out I had a very pointed conversation with one of the GM reps at Sebring about their continuing that mistake.
The low weight items being developed by Mr. Linton will no doubt be beautiful and perfectly befitting of the 911R Character. There may even be a few R owners that track and ultimately go through a few of these.
For the rest of us front splitters, side splitters and rear diffusers are wear items on the track. Perfectly finished OEM quality, exposed carbon fiber is not my preference for consumables.
Personally I like the plastics even with the added weight, though there may be a middle ground construction with a stiff, lightweight carbon core or skeleton and a plastic or fiberglass exterior.
I've considered ordering a replacement 991 GT3/RS under tray and fabricating a kit to add the diffuser fins.
They say "A direct fit for 2014-2016 GT3 & GT3 RS models, but minor modifications could be required to match openings on the original engine cover. Due to the aggressive aerodynamic effects caused by this product, consult a race specialist to ensure aerodynamics are balanced for high speed or race applications."
The opening for that cooler will need to be added to allow the cover with diffuser to fit properly.
12-29-2016, 09:47 PM
