Exhaust: Mid collected dual vs. true dual?
#28
Rotary Enthusiast
iTrader: (5)
As an update to this, I've scheduled a couple dyno pulls to test this out. I'm going to do a baseline pull with my current rb true dual exhaust and then swap the exhaust to a friend's spare custom collected set-up.
Custom set up:
This is an RB collected header ->2.5 ID rb presilencer->2.25 ID magnaflow muffler.
The current tune will not be touched and I'll be happy to share my results once done!
Custom set up:
This is an RB collected header ->2.5 ID rb presilencer->2.25 ID magnaflow muffler.
The current tune will not be touched and I'll be happy to share my results once done!
#29
Rotary Enthusiast
iTrader: (5)
RESULTS!!!!!!!!!!!!!!
These dyno pulls were done on the same day within 30 minutes of each other.
Here is an image of the paper copy. I'm still waiting on the digital file.
1st pull:
-Racing Beat True Dual full system
---175.3whp/ 143.7 ft.lbs
2nd pull:
-Racing Beat collected header->RB presilencer->2.5 in. ID pipe->magnaflow muffler
---179.6whp/ 152.4 ft.lbs!
3rd pull:
-Same as 2nd
---177.8whp/ 149.8 ft.lbs (not sure what happened here, intake temps going up?)
Overall, the mid range picked up nicely and the car feels more responsive. I'm convinced to go single, plus I get to lose 40+ lbs of dual exhaust!
These dyno pulls were done on the same day within 30 minutes of each other.
Here is an image of the paper copy. I'm still waiting on the digital file.
1st pull:
-Racing Beat True Dual full system
---175.3whp/ 143.7 ft.lbs
2nd pull:
-Racing Beat collected header->RB presilencer->2.5 in. ID pipe->magnaflow muffler
---179.6whp/ 152.4 ft.lbs!
3rd pull:
-Same as 2nd
---177.8whp/ 149.8 ft.lbs (not sure what happened here, intake temps going up?)
Overall, the mid range picked up nicely and the car feels more responsive. I'm convinced to go single, plus I get to lose 40+ lbs of dual exhaust!
#41
It's 1620 somewhere...
iTrader: (1)
I'm a little late joining this chat but, I have about the same question... Right now I'm running the RB tru-dual setup with aero turbine resonators and aero turbine 2540i mufflers on each side. The car is ungodly loud and though it was great at first, I'm ready for something quieter. I want to stay dual but am curious about possibly welding in an x-pipe somewhere. Do the RB pre-silencers ever wear out, or should I replace the pre-silencer with something that collects within itself?
#42
Old [Sch|F]ool
The presilencers are somewhat interesting in that they are not all-muffler but have a kind of terminator box in the front.
Mine are old enough to have rusted through where they were welded to the adjacent pipe but they are still quiet as long as the cracks stay puttied shut
Mine are old enough to have rusted through where they were welded to the adjacent pipe but they are still quiet as long as the cracks stay puttied shut
#43
It's 1620 somewhere...
iTrader: (1)
The presilencers are somewhat interesting in that they are not all-muffler but have a kind of terminator box in the front.
Mine are old enough to have rusted through where they were welded to the adjacent pipe but they are still quiet as long as the cracks stay puttied shut
Mine are old enough to have rusted through where they were welded to the adjacent pipe but they are still quiet as long as the cracks stay puttied shut
#45
Senior Member
iTrader: (7)
X pipe
The x pipe will help quiet the exhaust down because the 2 pulses will somewhat cancel out some noise . To save some room magnaflow makes a dual 2" in and out with a perforated x pipe inside ,tear there crap packing out and fill it with course s.s.wool ( mc master Carr sells it by the pound , one pound is more than enough ) . I did this on my repu with a street port 13b and did a 2" dual inlet to 2 1/2 " single outlet and it worked great
#46
Old [Sch|F]ool
Magnaflow uses stainless packing.
That said, I used to have a 2.5" Magnaflow and a loooong bullet muffler that I repacked. It was NOT quiet. At all. Wasn't OMG ROTARY LOUD but still loud enough to get me pulled over every few months.
That said, I used to have a 2.5" Magnaflow and a loooong bullet muffler that I repacked. It was NOT quiet. At all. Wasn't OMG ROTARY LOUD but still loud enough to get me pulled over every few months.
Last edited by peejay; 09-06-16 at 10:36 PM.