No its for the sexy sound!

YouTube - Robispec Nissan 370Z single exhaust

the twin exhausts I have seen are 40-50 mm the single is 3" = 77mm

the 3" flows 4 times what a 40mm single 3 times a 50mm and 2 times a 60mm would so 40mm + 40mm = 2x the flow...vs 4x with the "BIG single"

Sounds okay. Kinda average, to be honest, maybe even slightly below average. That's just my subjective opinion, of course; I prefer a deeper sound. But I'd be more interested to see what kind of gains this design yields over stock on the dyno. Function trumps form, in my books.

A little loud for my tastes but that is what a single should sound like. Reminds me of the guys in my car club with de 350z's with exhausts except with more awesomeness up top thanks to the vq37. I'm going to go from the dual 2.5 header outlets through a custom y pipe into single 3.5 to the back. i wan't to see what one large tip the size of the rear valence area looks like before i decide on tips. Three problems so far- 1. spent all my exhaust money on fines 2. hard to snake 3.5 out past the axles without being a scrape machine 3. Hard as hell to find good 3.5 stainless and mufflers. Thinking of using a borla race straight through in the middle and maybe something at the back. It's still at bar napkin stage.

+1 but I dont have a race car. So 5hp aint worth the less than spectacular sound.

http://upload.wikimedia.org/wikipedi...de_exhaust.JPG

can something like this be done? a little cleaner and more form fitting... but that should clear enough in the center channel... to make a decent diffusing tunnel, with some side diffusers.

side exit exhausts...of course it can be done. Its just annoying loud...like that pic you posted is annoying big.

Anything like that will require fram cutting... Forged performance is going that route :tup:

Woah now i don't need my exhaust disintegrating on my causing engine failure :p

But add the weight savings of a single vs a dual, and then maybe the equation improves?

There is a ton of conflicting info on the web about this subject (single vs dual), and a ton of outright BS (one site goes so far as to say that exhaust gas does not flow backwards at all) but I've always understood that a properly designed single is no more or less efficient or powerful than a properly designed dual. It still comes down to balancing flow and velocity with the correct diameter, bends, welds and design.

:bowrofl:

hahaha funny I type quick and sometimes letters get left out :rofl2:

Yeah weight savings does tip the scales a little bit in favor of the single pipe. Maybe something to look at later down the road. Although longtube headers running straight all the way back would be better in my opinion. Throw a couple of v-banded cats in the middle for daily driving and then replace them with V-banded straight pipes for the track. I think I just made a mess in my pants and I figured out what I'm eventually going to do with my exhaust...

The way I look at it, lot of what determines the benefits of single vs. dual comes down to the diameter of the piping and the material used. If my theory is correct, a titanium single with 3"/4" main diameter should have better results when compared to a 2.5"/2.75" stainless steel dual exhaust.

When comparing theoretical exhaust designs, there are simply too many lurking variables to really draw a good conclusion. A better question to ask, would be something along the lines of "Is the Amuse R1000 single better than the Amuse RS-Silent in terms of performance?" or "Is the Robispec exhaust better than the F.I. or Stillen ehxaust?"

Just my .02.



I heard V-band and longtube..:excited: :yum: :eek:

I look forward to reading your journal updates :tup:

-Hunter

No harm intended i thought it would be a funny car joke.

Edit: Not saying you found it offensive just backing up my intent before a problem occurs so we don't fight this out over three pages and kill the thread.

Also i like the v-band idea for swapping out exhaust components might have to do that with my mufflers(for that stupid-loudness)

Edit2: Is it okay to give rep for being able to take a joke and not starting a big internet argument?

Because of the uneven firing order of the cylinders in a V6 like ours, we don't really need crossover pipes. The idea is that there aren't any exhaust pulses arriving into the exhaust at the same time and therefore we don't have a flow obstruction issues. At the same time, crossovers have been shown to increase the efficiency of V6's and make more power..as long as the crossover happens at the correct distance from the headers. Placing it too far or too close is actually detrimental. So you can get away with having a single exhaust, just as long as you have equal length headers.