Thinking about eliminating muffler...

[my_precious]

i've read of open o2 set ups and no downpipe/exhaust...i thought that it would burn stuff in the engine bay too. I planned on buying a down pipe before i start running my car, but if i could just run an o2 housing then heck yeah! (not really, i would for awhile but it would be too loud.

 

[mastadogg2]

heres a video of mine, this is a 16gsetup, with apexi catback and downpipe with no cat.

http://www.localnerds.com/races/2ndgearFWD-WWD.MPG

and yes its FWD

 

[napkinthief]

5 days later and the clip is already down....repost somewhere please

I am thinking about my exhaust, although I am n/t right now, i will be turbo before spring.

I want a 3" downpipe down to the cat. Hiflow cat down to the back, at the back i am putting on my stock muffler, but I am going to gut it, take off all the piping from it, and reweld a 3" inlet, and 2 2" outlets, then have the outlets each go to a side of the back with chrome tips. I dont know if I should add a resonator or not, but I probably will.

My other option was to have the same setup, but instead of messing with the stock muffler, I would have a Y split of the exhaust piping after the rear wheels, then put dual 3">2" reducers and a 2" resonator on each side with chrome tips to the back.

I am trying to get as close to the srt4 sound as I could because I think its the nicest sounding car out there right now. At least in my area.


I do have a question though. At idle my car is nearly silent. At 2-3.5 rpms, It has a very deep rumbling exhaust noise that I love. Past 3.5 it goes downhill, like its breaking some kind of sound barrier and gets all retarded sounding, choppy, and cracking. I will try to get some sound footage, but the only method of recording is my phone and the mic on it sucks.

 

[mastadogg2]

here we go; http://tinyurl.com/dxu5j

Sorry I changed files around and forgot to move it back.
Thats why FWD is bad with a DSM

Thats Apexi catback, Apexi downpipe (no cat)

Sorta restrictive in some areas but 70% is 3".
If I could do it over I would go with an RNR turboback
where the o2 housing is apart of the downpipe

 

[beatshack]

http://www.beatshack.com/exhaustvid.avi

stock o2, stock downpipe, high flow cat, thermal R&D 3" catback

that high pitched steam whistle sound may be a boost leak.. i need to check. if its not though, it sounds pretty cool

 

[mastadogg2]

http://www.beatshack.com/exhaustvid.avi

stock o2, stock downpipe, high flow cat, thermal R&D 3" catback

that high pitched steam whistle sound may be a boost leak.. i need to check. if its not though, it sounds pretty cool

boost leaks arent that loud. probably alternator

 

[SethA]

OK, everyone is saying exhausts sound great and what not, but How about POSTING SOUND clips? That would gr8ly help. I have 3" turbo back, catco highflow cat, and a magnaflow muffler. At idle its a lil burbles a lil, when cruising its quiet, and when smashing on the gas, it gets loud. I too would post a sound clip, the bad thing is that my car is down and out for about 1-2wks.

There are a pile of exhaust clips here:

http://www.dsmtuners.com/forums/showthread.php?t=137124

I must be getting old, my RSR with cat is loud enough for me.

Seth

 

[beatshack]

boost leaks arent that loud. probably alternator

ha no, its not the alternator. its psi related, not rpm related.

 

[beatshack]

update: it was a boost leak right on the turbo outlet gasket. it was leaking so bad, i couldn't even build up 1 psi in the system using a bike pump!! poor turbo, its been working over time for all this time... and i'm still seeing full boost by 3500 rpm

 

[mastadogg2]

on what turbo? 14b? 16g? if either of those 3500 is still to high. do another leak test. I have a evo3 16g and make 10psi by 2500rpm full boost @ 3k. .. ya helps to have no leaks at the turbo outlet.. that musta been a HUGE leak.. next time RTV the hell outta that area