HP gains if you cut off exhaust?

[MindBlowin03]

If you were to cut the exhaust right in front of the cat. converter, do you gain hp?

 

[L2RTSiAWD]

Not on an N/A car but you would on a turbo car.

Later,

 

[G50trim92]

The NOISE that it would create is not worth it. Not even on the turbo cars IMO.

 

[larryd]

its loud

 

[crankbender]

Who said loud is bad?

 

[larryd]

i did, its loud enuf that i was setting off car alarms from 6 lanes over at 2000rpms.. mine is nothing after the downpipe right now beucase of my exhaust issues.. and its loud

 

[mitsugst95]

.... thats funny larry.... i also can vouch for it being loud.... i had my exhaust off while waiting for a new system.... juts go with a full 3" as it will be pretty close to the same performance as having no exhaust

 

[Formz]

its a totally different sound too. Its crazy.

 

[larryd]

the thing i like about it though, is you can here the turbo.. like it really sounds like a jet

 

[Formz]

haha yea without a doubt.

 

[larryd]

anyone have a place I can upload the video I made to.. its of my car revving with this exhaust setup right now.. 15 second clip, 3 megs in AVI format

 

[MindBlowin03]

Well, I am talking about a turbo car, not mine. Anyways, the reason I ask is because I talked to a guy that told me he gained AT LEAST 50 hp by cutting the pipe right in front of the cat. I didnt believe him, but he told me its dyno proven.

 

[L2RTSiAWD]

It's possible to get 50HP depending on engine and turbo size.


BTW I ran with open DP once. It vibrated so bad it skipped my CD player.

Later,

 

[MindBlowin03]

Originally posted by MuttedTSiAWD
It's possible to get 50HP depending on engine and turbo size.

Later,

Well, he is totally stock except for that. Its a 90 TSi. How much HP do you think he gained by doing that?

 

[L2RTSiAWD]

Not even 30HP. becasue his 1g exh manifold still sucks and his 1G O2 housing still sucks and his 1G stock DP still sucks. I'd say 10 at the most.

Later,

 

[4Banger]

Id say 10 to 20, If you bypass the cat (remove it and install a racepipe) you'll probably get close to the same results without all the noise...