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YOUR RESEARCHPorsche Stock Sport Exhaust Heavier & Slower?
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11hp here...and 9 more once the K&N intake was installed - the car was tuned PRIOR to getting these things done...
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If you want a proven increase from the factory get the X51 kit (be prepared to get out your check book).
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I read a comment on a thread about the Porsche Stock Sport Exhaust being heavier and having no power gains over the regular stock exhaust.
Is this true?
If so, I'm a little bummed as my "new" 2002 P-car comes with the sport exhaust and I was looking forward to a little extra power. This blows my mind that a performance-oriented car manufacturer would have a "sport" upgrade resulting in a downgrade in performance.
Joe
Settle thy heart.
No basic aftermarket bolt-on such as an exhaust is going to give you any sort of power advantage over a stock unit and this is true for naturally aspirated engines.
It's for sound and looks and that goes along way to enhancing the driving/ownership experience, imo. The PSE unit sounds insanely good and it's the only way to fly the 911.
PSE is sick. The best part is that it gets SOOOO much better over time. It sounds so good that all the prada mommies in Georgetown say "that's obnoxious" when they hear it, which is the automobile equivalent of the "Good Housekeeping Seal of Approval"
I'm not sure I agree with that statement Benjamin. At lower RPMs your point is valid but at higher RPMs you should see a small horsepower gain (maybe 10hp). At least that's the way I read many of the dyno charts. Also, it does sound better and you will usually save weight.
My butt dyno ain't that sensitive and I'm not going to go out there betting pink slips against that stock 911 cuz I now have more power according to an eye chart.
Ha! Ok, let's see if we can get some of the real 996 guru's to chime in. This is one of those topics, like oil types and brake pads, that always brings out differences of opinion. I'm no genius but I just rolled this topic around with one of our local aircooled Porsche mechanic geniuses. I took your side in that arguement Benjamin and he shot me down. lol.
ps: I'm not casting stones at you brother, you could be one of the 996 geniuses for all I know. Just trying to stimulate some convo on the topic. Yeah Yeah, I know it's been done over and over and over before but in a sick twisted way, I still like to see these threads evolve. Something new usually comes out every time.
IMHO, you are not going to gain much w/an exhaust on the 996. In fact some aftermarket exhaust have been shown to lose hp (dyno).
Chip, headers, and intake are your best bets from what I have seen on a 996 (short of FI) and even with those mods you'll spend a lot for moderate gains.
If you want a proven increase from the factory get the X51 kit (be prepared to get out your check book).
Please post the dyno sheets including details on exactly what you have done to the car. That is more than I have ever seen an independent and unbiased party achieve.
No debate. I would like to see the facts upon which his statement are based. When he posts the proof, there will be nothing to debate. I assume they will show that he did before and after dynos so that he knows exactly how much HP he gained by the respective mods.
Porsche themselves claim zero HP gain. If they could, I'm sure they would and it would cost an extra grand or two.
PSE is, IMHO, one of the top 3 best options you can get. It's one of those things on a car that once you have it, you know you will never ever be able to live without it again.
It is worth an extra 2 or 3 points on the grin scale
never mind HP!
My PSE:
http://www.youtube.com/watch?v=85143TXV0Ug
http://www.youtube.com/watch?v=xVmyNZi7HWs
You guys know that most if not all local vendor dyno runs are more art than science?
Unless you can hold constant, have control over the multiple variables in this thing called life and the environment that we live in, that 9-10HP gain is subject to the variance range that may well be + or - 10% or more.
I mean look, if it makes you feel like you're going faster which imo is a byproduct of you trying to justify your cost whether you're a man about it or not, it was "worth" it to you and thus solidified its value. You'll then go on to pontificate to others in car clubs, online forums, etc that X product did great for your car and this propagates itself over and over again...
It's all about adding to the bottomline of what we call a passion and love for our 911s.
Let's not split hairs about nominal 5-15hp gains. So you gained... now what? That Turbo's still wiping your **** in the straights.
Besides, even if you gain 5-15HP on the peak but lose as little as 5HP at other points on the tach, you're just moving the pile of dirt around. If substantial gains exist, there would be no debate. Example: Can anyone dispute that bolting on a turbo increases power? No debate.
The Porsche Sport Exhaust (PSE) is for "Sport Sound" only. Porsche does not claim any performance gain from these exhausts because there is none. The PSE Carrera/GT3 mufflers are actually the same as the regular 3-chamber stock mufflers, just with a partial bypass coming off the second chamber to add sound. Although it does partially bypass 1 chamber in the muffler to increase sound, it does so abruptly as to not increase flow. Call Ruf Autocentre and talk to anyone in the shop about their dyno results: absolutely 0 gain; even on an R Turbo coversion with the Turbo PSE. Although the 997 Carrera PSE version bypasses some of the exhaust from inlet to outlet, it does so with restrictive bends and a very small bypass tube. Since they are actually modified stock mufflers with valves, they are heavier than the stock mufflers. Ruf does not detract people from buying them as they do have a significant sound improvement, but they will tell you straight up there is no power gain.
I went with a pair of Fabspeeds due to their solid reputation, claims of no resonancne and straight through design. My personal car gained 22 RWHP from the pair of Fabspeed mufflers and a K&N 63-series intake. My peak numbers increased from 270.1 rwhp @ 6200 rpms to 292.1 RWHP at 6600 rpms on a Dynojet 248C. I gained 14 RWHP at 4400 rpms and almost 30 RWHP at the redline. I don't know the power gain between the mufflers and the intake as I never dynoed each separately. They mufflers are also roughly 30 lbs lighter than the stock mufflers (physically about half the size). You also don't realize how big and heavy the stock mufflers are until you remove them.
I rode in rcg412's '03 with PSE. That car sounds like a Forumula 1 car when it hits 100! Awesome sound above 4k rpm. Not my thing, because I like smooth and quiet, but the PSE does sound nice!!
