Question concerning test pipes and exhaust
Question concerning test pipes and exhaust
Okay I got my Z in November of 2008 and now have some spare money to throw into it. I want to know what exactly a test pipe is in layman's terms; I googled it obviously and it gave me a very in depth perception of it that I didn't understand. I know a lot about mods but not the innerworkings of them and haven't heard the term test pipe so I guess I don't know as much as I'd like, haha. I was thinking of getting the HKS Hi-Power Cat system because I like sound but I don't want just sound I want something that adds power to my car otherwise it's a bit pointless to get. Sounding fast and being fast are two totally separate things and I want to get both.
I am sorry if this is an inappropriate question for the board but I am searching for answers and I wasn't able to find anything about the HKS gains or even the gains from other exhaust systems. Thank you for all your help.
I am sorry if this is an inappropriate question for the board but I am searching for answers and I wasn't able to find anything about the HKS gains or even the gains from other exhaust systems. Thank you for all your help.
Z's stock cats are by far and away the most restrictive point on the exhaust system, (think of them as kind of tiny mufflers) and are located just downstream of your exhaust headers, with the "Y" pipe downstream of cats.
To get your exhaust flowing more freely through the exhaust system you need to get rid of that power robbing choke point. The best way to do this is to replace the cats with plain ol' straight through pipes, or "test pipes".
All test pipes (or cat deletes) are is simply a straight peice of pipe...period.
"High flow cats" are just faster flowing cats that are not as near as restrictive as your stock cats, but will still control emissions and reduce sound output at the tips. Although test pipes are more free flowing, HFC's are almost as good, with just a tad more restriction than test pipes, but still good enough to give you a great performance improvement.
Having test pipes will throw an O2 sensor code, obviously, (O2 sensor that is connected in at your stock cats) but HFC's will NOT throw a code and if you live in an emissions testing state, most will pass these tests.
There is your freebe buddy, welcome to the site.
To get your exhaust flowing more freely through the exhaust system you need to get rid of that power robbing choke point. The best way to do this is to replace the cats with plain ol' straight through pipes, or "test pipes".
All test pipes (or cat deletes) are is simply a straight peice of pipe...period.
"High flow cats" are just faster flowing cats that are not as near as restrictive as your stock cats, but will still control emissions and reduce sound output at the tips. Although test pipes are more free flowing, HFC's are almost as good, with just a tad more restriction than test pipes, but still good enough to give you a great performance improvement.
Having test pipes will throw an O2 sensor code, obviously, (O2 sensor that is connected in at your stock cats) but HFC's will NOT throw a code and if you live in an emissions testing state, most will pass these tests.
There is your freebe buddy, welcome to the site.
welcome and ensure you read this entire thread!
https://my350z.com/forum/2003-2008-n...questions.html
-J
https://my350z.com/forum/2003-2008-n...questions.html
-J
Okay I got my Z in November of 2008 and now have some spare money to throw into it. I want to know what exactly a test pipe is in layman's terms; I googled it obviously and it gave me a very in depth perception of it that I didn't understand. I know a lot about mods but not the innerworkings of them and haven't heard the term test pipe so I guess I don't know as much as I'd like, haha. I was thinking of getting the HKS Hi-Power Cat system because I like sound but I don't want just sound I want something that adds power to my car otherwise it's a bit pointless to get. Sounding fast and being fast are two totally separate things and I want to get both.
A HFC is a High Flow Catalytic Converter. A cat helps convert the poisons coming from your tailpipe into less harmful chemicals. A cat converts Nitrogen Oxide into Nitrogen gas and oxygen. It converts Carbon Monoxide into Carbon dioxide (the same stuff you exhale and plants photosynthesize back to O2). Finally, the cat acts as a system to oxidize (or burn) any unburned hydrocarbons converting them into CO2 (Carbon dioxide again) and water vapor.
A test pipe simply connects your engine to the rest of your exhaust system. A resonated test pipe does the same thing and tries to quiet it down some in the process.
A cat is a very complex (and expensive) piece of chemical engineering. A test pipe is, well, a pipe.
FWIW, I think that anyone that puts test pipes on anything but a dedicated race car is being socially irresponsible. Catalytic converters are there for a reason, they drastically reduce the poisons your car is emitting into our air. Think of it this way... How would you like it if I came to your house and pumped it full of Carbon Monoxide, Nitrogen oxide, and hydrocarbons?
Go with a HFC. You can get increased performance without the huge pollution hit that you would get with test pipes.
A test pipe simply connects your engine to the rest of your exhaust system. A resonated test pipe does the same thing and tries to quiet it down some in the process.
A cat is a very complex (and expensive) piece of chemical engineering. A test pipe is, well, a pipe.
FWIW, I think that anyone that puts test pipes on anything but a dedicated race car is being socially irresponsible. Catalytic converters are there for a reason, they drastically reduce the poisons your car is emitting into our air. Think of it this way... How would you like it if I came to your house and pumped it full of Carbon Monoxide, Nitrogen oxide, and hydrocarbons?
Go with a HFC. You can get increased performance without the huge pollution hit that you would get with test pipes.
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