I am going to be getting a new muffler in a couple of days, since my friends keep telling me mine sounds like its shot.
I know that everyone hear recommends magnaflow, however my friends tacoma sounds great with a dynomax super turbo. Plus the dynomax was the only one that he has used that seems to give him more power.
According to their website, their mufflers allow more airflow out. Has anyone had experience with them?
Be mindful of what you're buying. I'd recommend an oval muffler by magnaflow, not one of the wider free flowing exhausts. I tried it on my 'rolla and I felt like it lost power due to the lack of backpressure.
What type of exhaust will depend on your budget, choice between flow or sound, and possible future mods.
The 1ZZ-FE can be helped out with uncorking the exhaust, but it is a little more complicated than just slapping on a catback or axle back system. You'll hear "backpressure" being thrown around, but what you really want to be concerned about is proper exhaust scavenging. It takes the piping length, cross-sectional area, and geometry of the exhaust ports and piping. Engine exhaust temps, length of exhaust pulse, max pressure, engine RPMs, also factor into this.
Get it right - the car will respond with more power. Get it wrong, the car will actually lose power. Most find that the realistic gains are somewhere in between. Even the best exhaust systems (header, downpipe, cat, free flow resonator, piping and muffler) - might only see 5-7WHP gain for several hundred to thousands of dollars invested into a custom exhaust.
Every once and awhile, a setup just happens to work just right - and you might be able to get some tangible gains from a COTS setup - but mostly pick them for the different exhaust sounds.
Magnaflow, Flowmaster, Borla, Dynomax, Bassani, SpinTech, etc. - lots of good ones out there. Each brand has ones that might appeal to your situation. Example - Flowmaster and Dynomax tend to have a lower RPM growl that tends to either quiet or raspy at speeds (depends on the series), some like Magnaflow and Borla start with a deeper burble and end up with a sharper growl at speed. Again, depends on the series and what other supporting exhaust bits you have.
Don't worry about the catalytic converters - they actually flow much better than what you'd think. Even compared to a straight pipe, they lose only 1-2HP on the dyno (plus don't have to deal with O2 simulators, etc.). Resonators - pick ones to compliment the muffler. This is where most of your sound attenuation occurs - the muffler shapes it to the final sound. May found that leaving the resonator off makes the system sound too tinny, metallic in sound - especially four cylinder engines. Exhaust piping also is a big factor, there is a case to keep the piping more compact. Unless you are running a turbocharger or supercharger, I would not recommend exceeding 2-2.25" diameter piping (OEM is ~1.75"??). This is especially true if you opt for smoother mandrel bends - a 2.0" mandrel bent exhaust flows as well as a 2.5" crush bent exhaust piping.
What type of exhaust will depend on your budget, choice between flow or sound, and possible future mods.
The 1ZZ-FE can be helped out with uncorking the exhaust, but it is a little more complicated than just slapping on a catback or axle back system. You'll hear "backpressure" being thrown around, but what you really want to be concerned about is proper exhaust scavenging. It takes the piping length, cross-sectional area, and geometry of the exhaust ports and piping. Engine exhaust temps, length of exhaust pulse, max pressure, engine RPMs, also factor into this.
Get it right - the car will respond with more power. Get it wrong, the car will actually lose power. Most find that the realistic gains are somewhere in between. Even the best exhaust systems (header, downpipe, cat, free flow resonator, piping and muffler) - might only see 5-7WHP gain for several hundred to thousands of dollars invested into a custom exhaust.
Every once and awhile, a setup just happens to work just right - and you might be able to get some tangible gains from a COTS setup - but mostly pick them for the different exhaust sounds.
Magnaflow, Flowmaster, Borla, Dynomax, Bassani, SpinTech, etc. - lots of good ones out there. Each brand has ones that might appeal to your situation. Example - Flowmaster and Dynomax tend to have a lower RPM growl that tends to either quiet or raspy at speeds (depends on the series), some like Magnaflow and Borla start with a deeper burble and end up with a sharper growl at speed. Again, depends on the series and what other supporting exhaust bits you have.
Don't worry about the catalytic converters - they actually flow much better than what you'd think. Even compared to a straight pipe, they lose only 1-2HP on the dyno (plus don't have to deal with O2 simulators, etc.). Resonators - pick ones to compliment the muffler. This is where most of your sound attenuation occurs - the muffler shapes it to the final sound. May found that leaving the resonator off makes the system sound too tinny, metallic in sound - especially four cylinder engines. Exhaust piping also is a big factor, there is a case to keep the piping more compact. Unless you are running a turbocharger or supercharger, I would not recommend exceeding 2-2.25" diameter piping (OEM is ~1.75"??). This is especially true if you opt for smoother mandrel bends - a 2.0" mandrel bent exhaust flows as well as a 2.5" crush bent exhaust piping.
WOW that was some informative write up Fish
Now do you have a setup that you think that works best for our 1ZZ-FE engine?
__________________
Rides:
2003 Tacoma Pre Runner SR5 TRD
1998 Corolla LE
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