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Old 10-02-2009, 08:49 PM
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Test Pipe

Need a test pipe for my 01 prelude base type. I saw a megan racing one for 76 bucks taxes in my hands from prostreet.com. You guys ever heard of this site? As well you got any other sites that i could order a test pipe from?

Thanks
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Old 10-02-2009, 10:12 PM
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Re: Test Pipe

Why do you need a test pipe? $76 is a lot of money to gain somewhere between 0.5-1.0hp at the wheels, while making your car sound tinny and raspy and running less efficiently. Not to mention the extra emmissions that the car will create, and the toxic fumes coming out of your tailpipe.
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Old 10-02-2009, 10:17 PM
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Re: Test Pipe

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Originally Posted by Brash22 View Post
Why do you need a test pipe? $76 is a lot of money to gain somewhere between 0.5-1.0hp at the wheels, while making your car sound tinny and raspy and running less efficiently. Not to mention the extra emmissions that the car will create, and the toxic fumes coming out of your tailpipe.
correctamundo. The smell alone should keep you from wanting those gawd-awful things. Brash said it perfectly.
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Old 10-02-2009, 10:42 PM
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Re: Test Pipe

Okay i should have been a little more specific. I just rebuilt my engine. I have all skunk 2 for my top end with forged pistons. Im running hondata s300. I have a cold air intake, header and full cat back exhaust. The cat is causing alot of air restriction. I would rather not put the test pipe but it will make my car run better with it in.
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Old 10-02-2009, 10:49 PM
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Re: Test Pipe

Why not go with a more legitimate hi flow catalytic converter? Sure it costs a bit more but it doesnt seem like you have short changed your car thus far....why start with a test pipe?
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Old 10-02-2009, 10:56 PM
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Re: Test Pipe

As mdtdnb said, why cut corners now?

And I refer to my previous statement, the difference between a test pipe anda high flow cat is (remember this was dyno proven at the wheels) between 0.5 and 1.0hp. While I admit this was a hot Ford Focus, not a Prelude it's still a high revving NA engine, so I can't see the result being much different.
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Old 10-03-2009, 09:59 AM
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Re: Test Pipe

^^^I agree with both of em. Go hi flow cat. Same power. Wont throw a cel and wont pollute as much as the test pipe. U haven't cheaped out thus far, dont start now bro!!
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Old 10-03-2009, 01:32 PM
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Re: Test Pipe

prostreet is a decent site but it takes a while for them to ship stuff i've ordered from them before
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Old 10-03-2009, 03:24 PM
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Re: Test Pipe

actually i've heard that the hi flow cats would probably throw a CEL
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Old 10-03-2009, 05:15 PM
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Re: Test Pipe

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Originally Posted by ride4life_mw View Post
actually i've heard that the hi flow cats would probably throw a CEL
Depends on which one you go with. It is one of those scenarios where you really get what you pay for. The good ones will usually be 49 state legal and wont be available in CA. These shouldn't throw a CEL but they wont meet the more strict emissions of CA either.
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Old 10-03-2009, 07:50 PM
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Re: Test Pipe

Not to mention that a hi flow cat is actually LEGAL to have unlike a test pipe....God forbid a cop sees you don't have one your in trouble...I have heard that close to my town some cops have a stick with a mirror on it to check under peoples' cars' to see if they have one!
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Old 10-03-2009, 08:33 PM
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Re: Test Pipe

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Originally Posted by Mdtdnb View Post
Depends on which one you go with. It is one of those scenarios where you really get what you pay for. The good ones will usually be 49 state legal and wont be available in CA. These shouldn't throw a CEL but they wont meet the more strict emissions of CA either.
gotcha, thanks for the clarification. i just figured most all of them threw the CEL no matter what.
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Old 10-03-2009, 09:05 PM
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Re: Test Pipe

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Depends on which one you go with. It is one of those scenarios where you really get what you pay for. The good ones will usually be 49 state legal and wont be available in CA. These shouldn't throw a CEL but they wont meet the more strict emissions of CA either.
^^^ Oh so true. I first had a test pipe, sounded like crap, and threw a cell, then got a OBX highflow and that too threw a cell (piece of junk). I now have a FLOWMASTER highflow, more pricey but haven't had any problems with it whatsoever.
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Old 10-04-2009, 02:46 PM
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Re: Test Pipe

Okay so this is gonna seem a bit out there seeing as what everyone is saying but ive seen cars pull 10 to 15 hp once they added the test pipe. My only concern now though is if i move to vancouver, BC im not gonna be able to meet the air care down there. I just dont want to have any air flow restrictions thats gonna be cuasing my car to not run the way it should.
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Old 10-04-2009, 05:18 PM
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Re: Test Pipe

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Okay so this is gonna seem a bit out there seeing as what everyone is saying but ive seen cars pull 10 to 15 hp once they added the test pipe. My only concern now though is if i move to vancouver, BC im not gonna be able to meet the air care down there. I just dont want to have any air flow restrictions thats gonna be cuasing my car to not run the way it should.
What cars have you seen get 10-15 hp? It sounds like specs you would read on the package for a generic brand...Just like when you get a new intake they say the same thing...but in reality you get like 3-6 hp. I don't know...respectfully, I am calling BS on that comment.

It also seems like you are persuading yourself to NOT get a test pipe b/c of Vancouver's air restrictions And I dont think you need to worry about the car not "running" the way it should. The cat is not too restrictive to where it will cause actual problems...the benefits of it far outweigh the cons.
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Old 10-04-2009, 05:45 PM
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Re: Test Pipe

Please tell me you resleeved the block before dropping in the forged pistons...

And if air restriction is a problem, get a bigger exhaust. Give us some more specific details on the parts on the car.
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Old 10-04-2009, 06:09 PM
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Re: Test Pipe

if i were u i would just take the cats out period dont even bother with the test pipe since u got all that work done to it, and u can get from ebay for 50 same kinda ****..i mean if ur not boosting you might lose back pressure depending on what bolts ons u have, but if ur boosting it doesnt matter much then.
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Old 10-04-2009, 08:39 PM
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Re: Test Pipe

I'm banning the next person that opens a "test pipe" thread.
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Old 10-05-2009, 09:03 AM
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Re: Test Pipe

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Test Pipe

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Old 10-05-2009, 03:21 PM
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Re: Test Pipe

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if i were u i would just take the cats out period dont even bother with the test pipe since u got all that work done to it, and u can get from ebay for 50 same kinda ****..i mean if ur not boosting you might lose back pressure depending on what bolts ons u have, but if ur boosting it doesnt matter much then.
I don't even know why i am dignifying this horse**** with a response, but come on man... if you don't know what you're talking about, don't talk about it.

First of all:
Running a test pipe IS "taking the cats out period". The whole point of a test pipe is to "take the cats out period" (by the way, there is only one "cat" in our cars, no need for taking the "cats" out).


Second of all, and even more frustrating to me:
THE NECESSITY OF BACK PRESSURE IS A MYTH

It has been covered soooooooo many times... You're engine does not need back pressure to run... as a matter of fact, too much backpressure is a bad thing....

The two things your engine DOES need to run well: FLOW AND VELOCITY

GENERALLY speaking, you achieve more FLOW by getting bigger pipes... however, bigger pipes usually equals less VELOCITY...

Smaller pipes equal a higher VELOCITY, but less FLOW...

The solution is to properly size your pipes to find a happy medium where you get a good amount of FLOW and VELOCITY...


Here is where the misconception comes in:
Backpressure is a BYPRODUCT of velocity...
Generally speaking, the more velocity you produce from your exhaust gas, the more backpressure you are going to build up... This does NOT mean that backpressure is something that is desired... it simply means that it is something that happens usually when you increase your velocity...

As a matter of fact, in a perfect application, there would be NO backpressure, you would only want the pressure acting outwards away from the engine...





And also, as for the OP and anyone else that advocates the use of a test pipe... let me put this to bed RIGHT now:

At the risk of sounding like a tree hugging hippie: If you run your car without cats at all (which is the same thing as running a test pipe), you are willingly and ignorantly killing the environment that our children have to grow up in... It is completely and utterly unnecessary and irresponsible. Deleting your catalytic converter all together will net you, what, .5 whp? 1 whp maybe? Is that really worth it? What is that gonna shave .01 off your 1/4 mile time? And at what cost?

Just get a ****ing high flow cat. It is much better for the environment, and anyone that tells you that it "causes a lot of air restriction" is a ****ing moron and has no clue what they are talking about...

I manufactured catalytic converters for a living as a welder. I can tell you from FIRST HAND EXPERIENCE that a high flow cat is a good improvement over a regular cat, and a test pipe is a negligible improvement over a high flow cat that is not worth the cost to the environment...

The end does not always justify the means, especially when the "end" is a .5-1 whp (MAYBE) increase, and the "means" is willingly destroying the environment my children need to one day grow up in...

A much more cost efficient and effective way of getting a better power to weight ratio is weight reduction. You will get much more usefulness out of reducing the weight of your car than you will by opting for a test pipe over a high flow cat.

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Old 10-05-2009, 04:58 PM
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Re: Test Pipe

^^^ not like you need it but rep'd. Well said, exactly what most of us were thinking I do believe.
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Old 10-06-2009, 07:07 PM
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Re: Test Pipe

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Originally Posted by BadMofo View Post
I don't even know why i am dignifying this horse**** with a response, but come on man... if you don't know what you're talking about, don't talk about it.

First of all:
Running a test pipe IS "taking the cats out period". The whole point of a test pipe is to "take the cats out period" (by the way, there is only one "cat" in our cars, no need for taking the "cats" out).


Second of all, and even more frustrating to me:
THE NECESSITY OF BACK PRESSURE IS A MYTH

It has been covered soooooooo many times... You're engine does not need back pressure to run... as a matter of fact, too much backpressure is a bad thing....

The two things your engine DOES need to run well: FLOW AND VELOCITY

GENERALLY speaking, you achieve more FLOW by getting bigger pipes... however, bigger pipes usually equals less VELOCITY...

Smaller pipes equal a higher VELOCITY, but less FLOW...

The solution is to properly size your pipes to find a happy medium where you get a good amount of FLOW and VELOCITY...


Here is where the misconception comes in:
Backpressure is a BYPRODUCT of velocity...
Generally speaking, the more velocity you produce from your exhaust gas, the more backpressure you are going to build up... This does NOT mean that backpressure is something that is desired... it simply means that it is something that happens usually when you increase your velocity...

As a matter of fact, in a perfect application, there would be NO backpressure, you would only want the pressure acting outwards away from the engine...





And also, as for the OP and anyone else that advocates the use of a test pipe... let me put this to bed RIGHT now:

At the risk of sounding like a tree hugging hippie: If you run your car without cats at all (which is the same thing as running a test pipe), you are willingly and ignorantly killing the environment that our children have to grow up in... It is completely and utterly unnecessary and irresponsible. Deleting your catalytic converter all together will net you, what, .5 whp? 1 whp maybe? Is that really worth it? What is that gonna shave .01 off your 1/4 mile time? And at what cost?

Just get a ****ing high flow cat. It is much better for the environment, and anyone that tells you that it "causes a lot of air restriction" is a ****ing moron and has no clue what they are talking about...

I manufactured catalytic converters for a living as a welder. I can tell you from FIRST HAND EXPERIENCE that a high flow cat is a good improvement over a regular cat, and a test pipe is a negligible improvement over a high flow cat that is not worth the cost to the environment...

The end does not always justify the means, especially when the "end" is a .5-1 whp (MAYBE) increase, and the "means" is willingly destroying the environment my children need to one day grow up in...

A much more cost efficient and effective way of getting a better power to weight ratio is weight reduction. You will get much more usefulness out of reducing the weight of your car than you will by opting for a test pipe over a high flow cat.
well said, guess i got my terms messed up and i know our cars only have one cat, guess im gettin a highflow cat.
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  #23 (permalink)  
Old 10-07-2009, 04:16 PM
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Re: Test Pipe

Lets Really put this topic to rest with some good old fashioned DATA:
Let me explain myself first. I used to be a vehicle inspector in Houston so I know the ins and outs of emmissions testing as well as have some detailed Data on a 5th Gen with a test pipe... I know I shoud have run the sniffer with the stock exhaust but oh well...'

We put the tester on a Chevy Silvearado 5.3L V8 ewmmision standards and this is what my 2.2L put out...

High Speed Test Standard / Current Reading / Result
HC (PPM) 92 / 130 / F
C0 (%) .51 / 2.4 / F
CO2 (%) Current 10.3
O2 (%) Current 22.5
Nox (ppm) 615 / 1606 / F
Dilution (%) >6.0 / 12.8 / P

Low Speed Test Standard / Current Reading / Result
HC (PPM) 94 / 134 / F
C0 (%) .52 / 1.97 / F
CO2 (%) Current 10.9
O2 (%) Current 21.8
Nox (ppm) 677 / 2150 / F
Dilution (%) >6.0 / 12.9 / P

There you go that is actually data from a Texas sniffer. I was running a knockoff dc header to 2.5 test to 2.5 Catback with a knockoff intake.

Now my 2cents I saw soooooo many cars fail the emmissions portion of the vehicle inspection with a cat that was less than 2-3 years old. So to me I could really give a crap about the emmissions a test pipe lets out... Its just another form of government controlling aspects of our life.

Booo Hooo for our childrens future... Sorry but I really dont think the few car enthusiasts that run straight pipes is going to offset the Millions of cars outthere that are putting out just a little less emisions.

In my humble opinion 1 hp is worth extra emmisions but thats just me.
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Old 10-07-2009, 05:05 PM
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Re: Test Pipe

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In my humble opinion 1 hp is worth extra emmisions but thats just me.

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Old 10-07-2009, 06:01 PM
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Re: Test Pipe

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In my humble opinion 1 hp is worth extra emmisions but thats just me.
Me --> <-- You

Agree to disagree I suppose...
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Old 10-18-2009, 03:54 PM
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Re: Test Pipe

Okay so im gonna go with the highflow cat. I completly agree with what everyone is saying abou the test pipe. I knew all of this already. No one even answered my question that i posted though. I appreciate all the responses but a simple yes to if prostreet is good or if you know any other places for test pipes would have been good. But now i need some places for a highflow cat.
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Old 10-22-2009, 12:38 PM
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Re: Test Pipe

glad i read this...
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Old 10-22-2009, 12:58 PM
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Re: Test Pipe

Got one on mine and it sounds horrible and no performance noticed.. I say no go..
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Old 11-10-2009, 10:59 PM
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Re: Test Pipe

anyone tryed the resonated test pipes? any one like them?
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