Fast Intentions exhaust is here!

Originally Posted by Matt

I'm no exhaust-guru, but I'd imagine a certain amount of "drone" is expected at lower rpms to get the sounds under-load and at higher rpms that everyone likes to hear.

I'm guessing people just want their cake and to eat it too. (no "drone" but all the exotic sound at higher rpms).

Originally Posted by kannibul

I installed mine tonight...did it without a lift, and just a pair of jackstands and a jack

I think I spent about 3 hours on it...most of that trying to bust loose the OEM exhaust. I didn't jack the car up very high, so I couldn't use a breaker-bar or really anything...lol. A couple times a bolt would come off one side, only for the other to be tight enough to have a molecular bond.

After all hat work, of course I took it for a spin w/ the wife since she helped me (fetching tools, complaining, talking too much, and handing me parts, you know, the usual stuff...) - butt dyno says a good chunk of gainage!...volume inside is quite a bit louder, and there is a definite (to me) drone at the 2K region with a 7AT (but the radiop does overpower it and you can hold a conversation over it without having to speak up...) - which equates out to be around 60-65. 70 and up it's less noticable. It's really noticable if you use moderate-light accelleration to where it doesn't downshift, and it just RUMBLES that much harder. Bumping the accel button the cruise is a good example...in fact, it rumbles hard enough to vibrate the steering wheel!

Overall I think I like it. The loudness in the 2K region might bother me, but I think some sound dampening material would help with that.

Definately sound more "racey" now - I just kept hearing Forza 3...lol


One othe thing, I think I'll take my car to the dealer and have them put it on a lift, so I can really torque down those bolts. I got them pretty snug, but they aren't NEARLY as tight as they were from Nissan...

Originally Posted by kdo2milger

damn you finally got them

which ones did you get again? res or non res?

Originally Posted by kdo2milger

nice...i got the non resonated...

i know what you mean by the drone in the 2100 to 2500 range...atleast thats where it is for me...but only in the upper gears like fifth and sixth...

Originally Posted by kannibul

It's there on all of them, with an auto it's noticable since it tends to drop the RPMs to that range when it shifts early and often. Usually I'm accellerating enough to where it doesn't do it for very long, but it's certainly there. It's probably why Tony recommended the 18" resos for 7ATs, even if one didn't have HFC's.

I also found it interesting that I'm hearing either some kind of backpressure pop or something along those lines, when downshifting the 7AT and engine braking only - kind of a muffled sound...(hit the paddle shifter, syncrho-rev kicks the engine up, tranny enguages, boof...ohmmmmmmmmmmmmmm hit it again...vroom,grab,boof..ohmmmmmm) - I didn't notice it before, but, then again the exhaust was quieter before

Originally Posted by kannibul

I also found it interesting that I'm hearing either some kind of backpressure pop or something along those lines, when downshifting the 7AT and engine braking only - kind of a muffled sound...(hit the paddle shifter, syncrho-rev kicks the engine up, tranny enguages, boof...ohmmmmmmmmmmmmmm hit it again...vroom,grab,boof..ohmmmmmm) - I didn't notice it before, but, then again the exhaust was quieter before

Originally Posted by XwChriswX

LoL Is that the scientific sound effect recontruction?

Originally Posted by kannibul

I also found it interesting that I'm hearing either some kind of backpressure pop or something along those lines, when downshifting the 7AT and engine braking only - kind of a muffled sound...(hit the paddle shifter, syncrho-rev kicks the engine up, tranny enguages, boof...ohmmmmmmmmmmmmmm hit it again...vroom,grab,boof..ohmmmmmm) - I didn't notice it before, but, then again the exhaust was quieter before

Originally Posted by 370Zsteve

Exactly! You are hearing something that was already there, just better muffled at the time. (Love the explanation btw vroom,grab,boof..ohmmmmmm).

I used to subscribe to one of those urban legends (for lack of a better term) that stated that if you change to a freer-flowing exhaust, you have to richen the fuel mixture to eliminate the backfire (mostly on deceleration) or else you will damage your exhaust valves from the detonation. Of course like most legends it was all BS.

On my BMW K1200RS, I installed a Staintune full exhaust, which eliminated the cat. It has a sweet, mellow sound, much louder than before (I like that on a bike, since the cagers can now hear me). But on decel, it backfires quite loudly. Fortunately it comes with an insert that screws into the tailpipe that muffles the backfire nicely while also giving it a sound that to my ears is not unlike a 911.

Originally Posted by m4a1mustang

That's pretty much it. The exhaust sounds fantastic otherwise, but there are some RPM ranges that sound very deep or produce some drone depending on the load the car is under.

First, there is zero sound deadening in this car to begin with so it's already pretty loud (tire noise). Two, it's a hatch... so sound isn't really going to be compartmentalized between the cabin and trunk area. I'm sure this system sounds a lot more tame on the inside in a G37 even if it sounds identical on the outside.

That said, the FI CBE sounds fantastic... it's the best sound I have heard so far for this car. I have heard a number of others in person and think they sound either weak or just very ricey. The FI exhaust is deep, throaty, and powerful. It is not "hollow" at low RPMs... it has depth like an American V8. It is not ricey and raspy at high RPMs like a weaksauce 4-banger... it has the refined yet aggressive scream of an Italian exotic.

Aftermarket exhaust is not for everyone... that's a fact. But for those that want it, without a doubt I think FI is the best out there.