browsing Renn-Art's website i was checking out the ATP Test Pipe..

heres what i saw that kinda made me say "hmmmm" :

"Fits 1997-2001 Audi A4/VW Passat with K03, K04, or ATP Elminiator Series Turbos - 3" racing downpipe deletes restictive cat immiediately after the turbo on the longitudinally mounted 1.8T. There is no welding or cutting necessary. The downpipe has a large 3" opening to take full advantage of the turbo flow and has provisions for the factory oxygen sensors. Typical gain is 200 to 400 rpm sooner spoolup and 40 ft/lb of wheel torque. HP gain is 10-15 on stock K03/K04 turbo and 30-40 on big turbos"

are these numbers correct? i mean damn .. if so.. thats $160 well spent..

 

with my elim 2871R kit, I really feel the difference after I put the test pipe in. it spools sooner, louder and more power. If you ask me how much hp? Dunno...

 

40 ft-lbs maybe at the crank on a GT30. It's still money well spent; everyone says the difference is noticeable, but not 40ft-lbs at the wheels from a test pipe. Why would people buy chips if all they really needed was literally a tube?

 

ive always wondered how peopel pass emissions with those things on. i would love to get one.

 

test pipe is a great SUPPORTING mod... the bigger turbo you have in front of it, the more it will help versus the stock cat. 10-15bhp on a chipped k03/k04 is optimistic, but within the realm of possibility...

and note that's not PEAK HP/TQ... but it will allow you to spool faster, and obtain higher numbers lower in the RPM band... so, say you're putting out 100hp at 3000rpm with the stock cat, and now you're putting out 140hp at 3000rpm with a test pipe. although your peak hp only moved from 200 to 210, it raised the curve by 40hp at one point.

disclaimer: this is purely hypothetical; it's not meant to represent any specific setup.

FWIW, i noticed a lot more power up top with my test pipe, but a little more *kick* down low with the stock cat.

 

just buy a hi-flow cat, fresh air is nice, why kill the environment for a slightly faster turbo spool :P

 

^^ Have you ever seen a hfc up close? With my old hfc i see light right there. Forget about the envoirment dude, you will never see the differnce between a testpipe and hfc affect you, trust me.

 

thats exactly what i was thinking.. but that was taken directly from Renn-Art's website.. so i was like "wtf? wow!" ... still might slap one of those on after my suspension..

 

what about emissions?

 

screw emmisions, lol I just bought a Ecode test pipe on tues day should be here soon i hope