Vibrant Performance Sedan Exhaust (Finally)
Originally Posted by Jeff92se
While I might agree in part with the size thing, I don't agree with the merging turburlance thing. If merging is really that much of a problem, then wouldn't X and H pipes also pose a "merging" problem? As flow goes past each other there.
Also each manifold is a 3 into 1 merge collector. Even headers do this. If anything the merging would help scavanging, not hurt it.
Also each manifold is a 3 into 1 merge collector. Even headers do this. If anything the merging would help scavanging, not hurt it.
That's a good point. Maybe it has opposite results and speeds up flow? I honestly don't know so I will gracefully bow out of that argument.
Joined: Nov 2005
Posts: 308
Likes: 0
From: Toronto, Canada
Originally Posted by ttrank
That's a good point. Maybe it has opposite results and speeds up flow? I honestly don't know so I will gracefully bow out of that argument.
Joined: Nov 2005
Posts: 308
Likes: 0
From: Toronto, Canada
I'm not going to get into the dyno today (Splitfire Performance) is booked all day 
. I'm leaving for Orlando tomorrow (PRI Show)! Will be back home on Sunday and going to the dyno next week Monday! Appointement has been pre-booked 
. Here a couple of pics I took yesterday!
. I'm leaving for Orlando tomorrow (PRI Show)! Will be back home on Sunday and going to the dyno next week Monday! Appointement has been pre-booked . Here a couple of pics I took yesterday!
Why do I bother to DIY???
iTrader: (3)
Joined: Jul 2004
Posts: 741
Likes: 1
From: SF Bay Area - Peninsula
^+1 Sound clips please!
Also, any chance the tips will clear the Nismo rear diffuser? I hope that it will stick out far enough...at least flush (if not further). For instance, the HKS one works fine for the standard bumper, tips seem to be almost flush from what I understand, but the Nismo add-on requires a couple inches or so I believe.
Also, any chance the tips will clear the Nismo rear diffuser? I hope that it will stick out far enough...at least flush (if not further). For instance, the HKS one works fine for the standard bumper, tips seem to be almost flush from what I understand, but the Nismo add-on requires a couple inches or so I believe.
Joined: Nov 2005
Posts: 308
Likes: 0
From: Toronto, Canada
Originally Posted by RocketG35
^+1 Sound clips please!
Also, any chance the tips will clear the Nismo rear diffuser? I hope that it will stick out far enough...at least flush (if not further). For instance, the HKS one works fine for the standard bumper, tips seem to be almost flush from what I understand, but the Nismo add-on requires a couple inches or so I believe.
Also, any chance the tips will clear the Nismo rear diffuser? I hope that it will stick out far enough...at least flush (if not further). For instance, the HKS one works fine for the standard bumper, tips seem to be almost flush from what I understand, but the Nismo add-on requires a couple inches or so I believe.
. Hopefully this gives you a bit of an idea of how far the tips go, until I get some new pics.
falconey - you asked about the butt dyno. the car definitely feels tons more responsive from top of 2 gear right through 6 gear. Just a little more cabin noise then I would like and that's the reason why we are going to make the resonator a tad bit bigger. Car feels like an animal but that could just be mental, so until I do the dyno I won't assume at all
Pipe diameter isn't everything in the bigger picture. How have you managed exhaust gas volocity matters much more.
Notice the different pipe diameter's in these dyno results done the same day, same place for this 350Z exhaust dyno shoot out published a while back (350Z Sport?)
Look at torque and where the
power is delivered and over what range. First 3 systems are TD's
Borla (car 2) = 8.2 Hp - 2.7 ft/lbs torque (peak values)
HP increase from 5500 rpm to 6500 rpm range. Lost HP & torque below
1800 rpm. 60mm pipe. Weighs 52lbs.
Stillen (car 1) = 8.1 Hp - 7.3 ft/lbs torque (peak values)
Hp and torque increase starting around 3000 rpm to redline. Lost a
little Hp & torque below 1800 rpm. 60mm pipe. 74lbs - 10 lbs heavier
than the stock system.
Injen (car 1) = 7.6 Hp - 5.1 ft/lbs torque (peak values)
Small torque loss at 2800 rpm. Torque gain starts at 3300 rpm. Small
Hp increase starts at 3300 rpm, maxing out from 5800 rpm to redline.
Major loss in Hp and torque below 2200 rpm. 49lbs. (50mm pipe IIRC)
Nismo (car 1) = 6.3 Hp - 4.5 ft/lbs torque (peak values)
Developed torque and Hp over wide rpm range. Torque increase starting
at 3000 rpm. Most HP increase from 4800 rpm to redline. No power
losses below 1800 rpm. 54lbs. 80mm
Notice the different pipe diameter's in these dyno results done the same day, same place for this 350Z exhaust dyno shoot out published a while back (350Z Sport?)
Look at torque and where the
power is delivered and over what range. First 3 systems are TD's
Borla (car 2) = 8.2 Hp - 2.7 ft/lbs torque (peak values)
HP increase from 5500 rpm to 6500 rpm range. Lost HP & torque below
1800 rpm. 60mm pipe. Weighs 52lbs.
Stillen (car 1) = 8.1 Hp - 7.3 ft/lbs torque (peak values)
Hp and torque increase starting around 3000 rpm to redline. Lost a
little Hp & torque below 1800 rpm. 60mm pipe. 74lbs - 10 lbs heavier
than the stock system.
Injen (car 1) = 7.6 Hp - 5.1 ft/lbs torque (peak values)
Small torque loss at 2800 rpm. Torque gain starts at 3300 rpm. Small
Hp increase starts at 3300 rpm, maxing out from 5800 rpm to redline.
Major loss in Hp and torque below 2200 rpm. 49lbs. (50mm pipe IIRC)
Nismo (car 1) = 6.3 Hp - 4.5 ft/lbs torque (peak values)
Developed torque and Hp over wide rpm range. Torque increase starting
at 3000 rpm. Most HP increase from 4800 rpm to redline. No power
losses below 1800 rpm. 54lbs. 80mm