Bardman

Its interesting, I have the cargraphic sport headers and have been thinking about the sound quite a bit. When you read the following its obvious that Porsche put a lot of emphasis on perfecting the sound.

http://www.total911.com/perfecting-t...w-911-carrera/

Can bolt on 3rd party headers improve on Bernard's work?

johnsopa

I believe most of what that article is referring to is how the car sounds from the outside. See the mic in the top right corner?

I agree that the GT4 sounds great from the outside.

My complaint is that sound experience doesn't translate to the inside.

My 981 Spyder sounds awesome when in the cockpit, whether with the top up or down. That's because most of the outside sound (which is the exact same as the GT4) can be heard inside.

When I have a helmet on and have the windows down for track days, I basically can't hear the GT4 engine/exhaust, so most shifting is done by memory/location/occasional glance at the tach.

My goal with the race headers was to get to a sound level that I could hear with helmet on and windows down but still have a streetable sound.

Before the headers, I had PSE turned on all the time (street and track). I think that I will have PSE turned off on the street most of the time except for fun backroad drives and then turn PSE on for the track.

johnsopa

Here's a quick video of how my CG race headers sound with stock PSE. PSE was turned on.

I'll try to get some better quality sound this weekend from the track.

Road was damp so I short shifted at about 5k.

Brosef

wow, that sounds amazing

Vintage72

super badass!

BGB Motorsports

YEP! We just finished a track only GTS with a full race system and it's really really really loud inside and out BUT the sound from the outside is epic. I usually put a lot of sound clips on our instagram page if you scroll through. http://instagram.com/bgbmotorsports. Thanks for the clip John!

Jimmy-D

Yep - that be loud. Sounds amazing

^I have sport headers with a valveless exhaust and it is also pretty much perfect. It only starts to scream above 5000 so can be kept tame, when needed. But, sounds just as amazing when you also lift off the throttle, while it gurgles and farts, not matter how fast or how low/high in the rev range

user1029

Race Headers - Bring the Indy500 to wherever you go. Bucolic farmlands? YOU GOT IT. School zones? NO PROBLEM. Harris Teeter? ABSOLUTELY.

C5driver

These threads are awesome when you missed out on the group buy!

Mech33

My Group Buy Cargraphics headers are up for grabs at cost. PM me if you missed out and want my spot.

johnsopa

OK, as promised, here are some drive-by videos of my GT4 with the race headers and standard PSE from a GoPro...

Me coming onto front straight:

F360 for comparison:

Me on front straight:

F360 for comparison:

And here is some sound going around the track. My microphone is taped to the back bumper so it's much louder and more tinny than you hear inside.



I am a very happy camper now -- with a helmet, I can hear the engine/exhaust perfectly. PSE closed with a light throttle, it's hard to tell the race headers are installed.

BGB Motorsports

Passing 911s everywhere! Nice work. Was a black Cayman R race car out there? We just finished building it.

fastauto

Someone post up some videos of the sport headers!

johnsopa

Hey John. Yes, I saw it today. Not sure what run group it was in. Nice BGB graphic on the windshield!

Reborn996

Just did my first track experience at Laguna Seca at a race class. I have the Cargraphic sport headers with stock PSE exhaust. I was flagged for 96db on the 90db track, I would say the sound is great. LOL