optimal exhaust size

[spencebm]

all i hear is this strange whistling noise with my 2.5 in straight pipe??? i must be going crazy or something and this high pitched noise like something is spinning really fast just beyond the firewall?? strange...

[okron1k]

all i hear is this strange whistling noise with my 2.5 in straight pipe??? i must be going crazy or something and this high pitched noise like something is spinning really fast just beyond the firewall?? strange...

lol...  :lol:

[spencebm]

straight pipes 4 life, at least 2.5 maybe 3 if you can pull it off, it is quiet and sounds like a choo choo train

[rabbit gti guy]

1.6TD with 2.5" - turbo back...no muffler/no nothing... http://s5.photobucket.com/albums/y165/80Rabbit/?action=view&current=100_0319.flv

[spencebm]

damn that sounds good!

[giulianot]

3" downpipe 2.5" from flex back! Point your exhaust tip down to keep black smoke off the rear of the car :twisted:

[carrizog60]

can you guys post pictures of your downpipes?
i have a friend that could do one for me but he said that the best would be to find a 1.9 downpipe because it is better to weld... :idea:
also,do you have to put a flex on it?
the stock one doesent have... :?:

[rabbit gti guy]

can you guys post pictures of your downpipes?
i have a friend that could do one for me but he said that the best would be to find a 1.9 downpipe because it is better to weld... :idea:
also,do you have to put a flex on it?
the stock one doesent have... :?:

the one i made looks almost identical to this one
http://vwdiesel.net/phpBB/viewtopic.php?t=10821

they are fairly easy to make if you have access to a welder and some fabrication skills.   i just finished my whole exhaust last weekend including the downpipe.   I bought some mandrel bent "U" bends and cut them up to form the downpipe.   The part that took the most time was figuring out the best way to cut and fit the U bends.   overall it turned out nice.   I dont really know about cutting up a 1.9 downpipe though, personally i would make one...just because it looks "cleaner" to me.

[giulianot]

here is the 3" downpipe that 935 racer made for my cabby wth a 1.9 aaz and a t3 turbo

 

All his downpipes are made of 304 ss  and are back purged with argon for the best possible weld. Honestly speaking it is the nicest tig welding ive ever seen. Truly a work of art

[Diesel Fumes]

1.6TD with 2.5" - turbo back...no muffler/no nothing... http://s5.photobucket.com/albums/y165/80Rabbit/?action=view&current=100_0319.flv

wow, yours sounds much quieter than mine.  If I blip my throttle it sounds like a freakin 1 ton diesel truck with straight pipe.  Maybe its because I have stock downpipe?

[MJF]

2,5" exhaust is a bit smallish for 200hp, go for 3"

[fastvicar]

Point your exhaust tip down to keep black smoke off the rear of the car :twisted:

I've always considered that a sort of tattoo that says "Beware!".   :twisted:

[larry104]

The exit port on a K14 turbo (92 Eco) is about 2.25 in. diameter. I guess I don't see the advantage of going to a larger ID downstream of the port. I run 2.25 in. I.D. pipe.

[MJF]

Yep, 2,25" will be fine for stock k14. You won´t get too much power with it

[MaxHedrm]

So, I'm guessing 2" would be plenty with an NA? With a muffler of course.