Hey!! got a question for you techs.. what are the advantages of running a test pipe on a d-series motor.

 

it deletes the cat

 

x2

 

Shouldn't you be in the apps./cos. forum?

Anyway.. There are both advantages and disadvantages... It's kinda like a 'Catch 22'... There is a reason for that cat to be there.
Your vehicle is designed to run efficiently. That means that there are other components in the system that rely on it being htere. With that being said: you need to "convince" your system that this is the way it should be.

 

im sorry i guess i worded my question wrong i know what a test pipe is for but i want to know if it any use on a stock d-series motor with stock exhaust. any gains? or it just loudness

 

None.

 

I already have a cooked cat from valve stems/seals, wouldn't it be (if it were not illegal) advantageous to remove the cat, scrap it for its worth and run a test pipe?

I mean the cat is COOKED and not doing anything I assume - as much smoke as I blow out in the morning!

could it lessen the smoke I burn off in the morning since it would have less of an area for the oil to get stuck in?

is it god awful loud or shitty loud?

 

IMO, converters that are bad, are most of the time burned up and holding your engine back, at least some what. I've had to replace at least 5 cats on different honda's over time, and 4 out of 5 times i choose to either run a testpipe, or just run straitpipe rather then paying $$$ for a new converter. And most of the time, i could tell a difference, of course not major hp or anything but i could tell the motor was running better. i know that its supposed to have one & all that , but thats my thoughts. & yes, it'll be a bit louder.

 

i personaly have one. skunk2 and in a d series engine you cant really notice as much. unless is turboed. now if you are talking a b series one it should be a bigger gain.

 

okay thanks to everyone!