Exhaust Question (Final One) - 986 Forum - The Community for Porsche Boxster & Cayman Owners

yellowbox · 06-25-2005, 11:53 PM

I'm glad you like it. So is the sound very similar to those on yellowboxster's website? (btw, that's not my site, I'm just another yellowbox!) I guess the resonance is gone once RPM exceed 3k, even just a tad above, in any of the 5 gears, right?

WillieB · 06-26-2005, 11:05 PM

is a bit different than Yellowbox's video as I believe his video does not do it justice. His exhaust might not be as tightly fitted as he made his own mounts. My mounts were fabricated by a machinist and welder, who made them for my mechanic during install. 2-3 hrs install. It sounds more like Trent Carters as he has the Evo Intake and the GHL combined like I have (see GHL vids on this thread). Makes a difference it seems on the 2.5L.

My wife filmed another vid of me revving it and then taking off down the street. Upon reviewing the sound, it is more than I hoped for....................I would say Ferrari 355 like, but in a Porsche Boxster. In comparison, I thought my neighbors 2005 G35 Coupe sounded sweet before, but when I heard him take off on hard throttle today, it was pale in comparison to the sound of my GHL. From the inside of the car it is decieving as like I said before it is quieter inside which is a good thing. But anyone in your rear will def. feel the wrath of it. It sounds so sweet. I also passed a parked Honda and set off the alarm in first gear. And I wasn't even hard on the throttle. You can even hear it hum on approach. Yes, I have gotten the hang of keeping the gears either below 2K RPM or above 2800 RPM as this is the huge resonance range. Also the resonance bugged me less 2nd and 3rd time drives. I guess it was just intial shock. But after the video shot from the outside, I am sold as this is the sound I wanted. Powerful, throaty, low growl, Ferrari like with the echos. Again, if you hang around 2K - 2800 RPM then you will hear the resonance. If you hammer it on WOT from 1st through to 5th (or 6th) it is beautiful.

Before the exhaust with the Evo High Flow intake, the deeper sound was at 4K RPM +. Now at range she will growl. So on take off 1K - 4K it is mostly GHL exhaust, then at 4 K and up, combo Evo Intake and GHL. Beautiful. The car also pulls clean earlier and also later in the RPM range. I know this is a subjective topic, but if you are like me and always enjoyed hearing a Ferrari or a Lambo let it rip and love the echo of the exhaust from 1st, shift to 2nd, and 3rd etc. 3 blocks away, then this is the one for you.

Adam · 06-27-2005, 10:51 AM

Glad you like the exhaust. It sounds like the one to get if you want an aggressive sound from the back. FYI: Be sure not to lug the engine in an attempt to keep the the resonance low. Porsche says keep it above 1.5K rpm.

WillieB · 06-27-2005, 02:52 PM

Quote:

Originally Posted by Adam

Glad you like the exhaust. It sounds like the one to get if you want an aggressive sound from the back. FYI: Be sure not to lug the engine in an attempt to keep the the resonance low. Porsche says keep it above 1.5K rpm.

Will do on the keeping it above 1500 RPM. I didn't know this. Then maybe I will use more gas and keep it above 2800 RPM.

Thanks again for the tip.

yellowbox · 06-27-2005, 04:48 PM

WillieB, so it's really "Ferrari 355 like"? I don't remember now a 355 sounded, but for sure a 360, which I've heard many times.

Maybe I should get the GHL exhaust, if I don't like it, I guess I can always sell it on ebay and recover some $.

For sure GHL has no torque loss, right? I want to make sure no power is loss

WillieB · 06-27-2005, 08:06 PM

Well Is shld say Mean Porsche like sound. Hmm, 360 Modena, don't know about that, this is a nice low growl. A growl no ricer I have ever heard has. Too bad my video is too big, you can hear it echo between the houses and I didn't even take it past 4K RPM in first gear. Word of advice, as long as you can deal with or drive between the resonance btwn 2K - 2800 RPM, you will be fine. Do your self a favor if you do get one, make sure you have someone take a video(s) of you taking off with the GHL on. Trust me, you will be surprised.

WB

Adam · 06-27-2005, 08:33 PM

does the rear bumper need to be removed in order to install an aftermarket muffler?

yellowbox · 06-27-2005, 10:33 PM

Quote:

Originally Posted by WillieB

Well Is shld say Mean Porsche like sound. Hmm, 360 Modena, don't know about that, this is a nice low growl. A growl no ricer I have ever heard has. Too bad my video is too big, you can hear it echo between the houses and I didn't even take it past 4K RPM in first gear. Word of advice, as long as you can deal with or drive between the resonance btwn 2K - 2800 RPM, you will be fine. Do your self a favor if you do get one, make sure you have someone take a video(s) of you taking off with the GHL on. Trust me, you will be surprised.

WB

I usually drive above 3k rpm, only worry is cruising on fwy at 5th when I want to take it easy. I really hope the resonance isn't that bad, I mean, you can't physically feel the bass like resonance, right? Just a loud low bass sound, right?