desertmike680
Member
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- 06 MazdaSpeed 6
So that and what makes the speed 3's exhaust sound so good as compared to the speed6's. Whats the difference there too?
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Test Pipe: What difference does it really make?
- Thread starter desertmike680
- Start date
I'm assuming it has something to do with the setup of the exhaust system itself... ie one tailpipe on the MS3 vs 2 tailpipes on the MS6. My buddy has an MS3 with a Corksport Power Series turboback and compared to the same system that I have on my car, I can say that his is obnoxiously louder than mine. Still sounds nice but I feel that mine sounds better and is WAY more bareable than his.
The second cat has a restrition in the inlet (~2") to the keep enough backpressure on the turbo exhaust to help with oil getting past the turbo turbine side and smoking. The test pipe eliminates the restriction and thusly the car revs a bit higher before falling on it's face.
The sound difference in the 3/6 exhaust note is tuned by Mazda and is most certainly related to the intended use of the car, a hot econo hatch vs a mature sports sedan...
desertmike680
Member
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- 06 MazdaSpeed 6
Thanks Forzda. By eliminating the 2nd cat with a test pipe doesnt necessarily mean that the turbo will smoke does it? Also, is there a noticable tone difference with a test pipe too? I would also assume that when it comes time for an emissions/smog check, that the 2nd cat would have to be put back on in order for it to pass.
If you really pay attention you will hear a slight increase in sound with the TP and it may or may not smoke with the TP. The emissions check depends on how your area inspects. It won't pass a visual if they're smart, but it should pass a sniff or ECU code check just fine.
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- 2011 Mustang GT
With a 2.5" TP on my MS6, the sound is very very minimal. I do notice a better spool up about 2-300 revs sooner than without the TP installed, and improved response between gear changes when getting on throttle.
StormTrooper6
Member
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- 2006 Mazdaspeed6 Sport
On the MS6, the stock 2nd cat has a heat shield over it that is removable. You can take it off and stick it over the SU Test Pipe. It gives a completely stock look. You'd have to get right up to it and look through the fins on the shield to see that there wasn't anything inside. Bonus for those worried about visual inspection.
There is a noticeable improvement in spool/power/smooth... the butt dyno says 5-8whp... noticeable but not like it's gonna blow your mind. Plus after a few days, you'll get used to the new power and be looking for something else. It's well worth the money. There are always TP's for sale used in the classifieds... it's a good first or second mod.
There is a noticeable improvement in spool/power/smooth... the butt dyno says 5-8whp... noticeable but not like it's gonna blow your mind. Plus after a few days, you'll get used to the new power and be looking for something else. It's well worth the money. There are always TP's for sale used in the classifieds... it's a good first or second mod.
Hey Sam! When you coming back?
yes
shadesofgray19
Member
I've been thinking about a test pipe as well but am unsure. Not sure if I want the corksport or one of the others that pop up in the FS area. SU charging the same price as Corksport's resonated pipe for the 3" pipe is rediculous. I've been thinking is it really worth it and can I run a stage2 OTS map with just the test pipe?
Up for orders in December... almost zero chance it will be back to Norfolk. We've still got the house there and I'll have to come back and check on the renters at some point for along weekend, but I don't think orders are in the card for another 4-6 years if ever. Sold the Miata but should have a nice Stage1+ MS6 when I get back... nothing to hold a candle to yours, but it's the wife's after all. Tell the crew I said HI!
Yes. It's just a hollow pipe that is a a direct replacement for a cat. Remove cat, install TP/RP in it's place using stock flanges and stock bolts(usually). Turbocharged vehicles benefit extremely well by removing even minor amounts of exhaust backpressure... way more benefit than on a naturally aspirated vehicle.
