Test Pipe = Power?
#11
01-27-2006, 11:23 PM
RE: Test Pipe = Power?
Magnaflow sells High-Flow Catalytic Converters for $76, I was thinking about having one installed further down the exhaust system, so it's not as restrictive, but I'll still have a Cat. I would just have to extend the Secondary Oxygen Sensor wires (Only four), and that would be that.
activemonkey, there are two. One reads the Air Fuel Ratio Pre-Cat, and the Secondary reads the Air Fuel Ratio Post-Cat. The Secondary is there to make sure that the Catalytic Converter is functioning properly. So when you put on a Test Pipe, it's now reading the same resistance as the Primary, so the ECU reads that as a bad Cat, thus it throws the code. However, tricking the Secondary into reading proper Air Fuel Ratio isn't hard at all, and it costs $5 to do. Icon Racing's design has it already incorperated though, so there's no modification needed.
activemonkey, there are two. One reads the Air Fuel Ratio Pre-Cat, and the Secondary reads the Air Fuel Ratio Post-Cat. The Secondary is there to make sure that the Catalytic Converter is functioning properly. So when you put on a Test Pipe, it's now reading the same resistance as the Primary, so the ECU reads that as a bad Cat, thus it throws the code. However, tricking the Secondary into reading proper Air Fuel Ratio isn't hard at all, and it costs $5 to do. Icon Racing's design has it already incorperated though, so there's no modification needed.
#12
01-27-2006, 11:28 PM
RE: Test Pipe = Power?
But where might i buy Icon Racing's test pipe, if i can get it by next week then good game, other wise i might just have to get thise one and wait for their to come out.
#13
01-27-2006, 11:29 PM
RE: Test Pipe = Power?
ORIGINAL: InsaneHatter
The test pipe will take away you cat, obviously.
This reduces backpressure allowing the turbo spool quicker.
This can also increase HP/tq.. i dont know about the numbers they gave but it can increase them
To get rid of the CEL you need about 5$ and a good drill.
Go to autozone and buy some Spark Plug Non-Foulers (18mm thread I belive). Drill ONE of them out so its hollow, but dont mess with the threads...
Screw them together so the hollow one is on top. Remove your secondary O2 sensor and put these foulers in its place. Then screw the o2 sensor into the foulers.
BOOM no CEL
The test pipe will take away you cat, obviously.
This reduces backpressure allowing the turbo spool quicker.
This can also increase HP/tq.. i dont know about the numbers they gave but it can increase them
To get rid of the CEL you need about 5$ and a good drill.
Go to autozone and buy some Spark Plug Non-Foulers (18mm thread I belive). Drill ONE of them out so its hollow, but dont mess with the threads...
Screw them together so the hollow one is on top. Remove your secondary O2 sensor and put these foulers in its place. Then screw the o2 sensor into the foulers.
BOOM no CEL
#14
01-27-2006, 11:30 PM
RE: Test Pipe = Power?
Better yet, $30 will go to someone who can build one, and install it. I can drive anywhere within NorCal (ie within 3 hours of SF)
#15
01-27-2006, 11:49 PM
RE: Test Pipe = Power?
It's not hard my man... Set a day aside, get a buddy to help, and just get a little dirty and figure it out. 
Icon Racing's Test Pipe won't be out for another few months, but I'll keep you guys posted.
Icon Racing's Test Pipe won't be out for another few months, but I'll keep you guys posted.
#16
01-28-2006, 02:27 AM
RE: Test Pipe = Power?
As far as the claims go....I believe with the bt setup, you will easily notice 25whp or more if you already have 3" mandrel bent exhaust and some sort of intake running a good amount of boost. I cant wait to get mine.
#19
01-28-2006, 12:40 PM
RE: Test Pipe = Power?
What other mods do you have? A test pipe on a stock A4 is stupid. Actually a test pipe on anything except a track monster is stupid, IMO. Sorry but true. You'll have to swap back on the cat to pass emissions. (Yes I'm in a bad mood).
#20
01-28-2006, 02:14 PM
RE: Test Pipe = Power?
But if you dont have smog it sounds like a good mod! I will say that it would be better to have a few mods, a test pipe on a stock A4 might kinda suck. I know a 3' downpipe on a stock eclipse would give you wicked boost creep!!! IMO not the best first mod more for the guys with lots of other junk....