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New Y-Pipe Design

DocStruthers said:
hmmmmmmmmmmmmm. I like that one. is that a cat even. . . ?
Click to expand...

Yes, a CAT was part of the Brullen Y-Pipe build. The 2003 group buy was championed by SVTCuervo and he gave the choice of a "high flow" or an "extreme flow" CAT. The real trick to pulling-off the closer-to-equal length runners was moving the Y-junction closer to the right side of the car. I think only about 30 of these Y-pipes were made which is why they are so rare to see in the classified ads section. It seems that there has been what one could call a "generational" turnover on CEG such that most people don't know this Y-pipe ever existed. The change over of this website from one server to another around 2005/2006 helped create a gap in available information too. People who bought this pipe said that it produced lower drone relative to optimized, BAT, MSDS, Sho-Shop and Weapon R y-pipes. I don't recall any problems with rasp either. Too bad Brullen is no longer in business.
 
here's what I came up with, it might need to be tweeked down a bit for clearance issues, but I think it's almost equal length and it retains the U shape and the cat. I did two versions, one with a single highflow cat in a test pipe, the other with a big dual inlet cat like found on some V8's in a special "Y/test pipe".

also, a compact dual inlet single outlet muffler/resonator could be placed there if a CAT is not needed and you just wanted to run a turn down behind a front wheel. or heck, you could even run a pair of small resonators with a turn down behind each wheel and you'd have a very loud set of true duals...

I tried to keep within the silhouette of the brullen pipe to keep fitment somewhat realistic, but real measurements of available CATs/flex's/resonators would need to be done to know for sure

lemme know what you think...

brullenypipeimproveddes.jpg
 
KAOS_3.0 said:
here's what I came up with, it might need to be tweeked down a bit for clearance issues, but I think it's almost equal length and it retains the U shape and the cat. I did two versions, one with a single highflow cat in a test pipe, the other with a big dual inlet cat like found on some V8's in a special "Y/test pipe".

also, a compact dual inlet single outlet muffler/resonator could be placed there if a CAT is not needed and you just wanted to run a turn down behind a front wheel. or heck, you could even run a pair of small resonators with a turn down behind each wheel and you'd have a very loud set of true duals...

I tried to keep within the silhouette of the brullen pipe to keep fitment somewhat realistic, but real measurements of available CATs/flex's/resonators would need to be done to know for sure

lemme know what you think...

brullenypipeimproveddes.jpg
Click to expand...

THAT is to funny my friend.
I had a dual flex pipe design JUST like that pop into my mind for a moment but I wanted to keep cost down any way possible and since I can't make the flex pipe, i have to buy it from someone which costs enough as is not to mention 2 of them. HOWEVER they aren't THAT expensive but I just thought it was funny.

You design is basically the SAME as mine, basically identical. Way to go! :)

I like the first design because that might allow an interchangeable mid pipe thing.
Allowing the cat to be installed and removed more easily.

Not sure if it will all fit i'd have to crawl under the car again to check and don't expect that to happen for a little while lol.
 
mrspindlelegs said:
I found pictures of the Brullen Y-Pipe but am having technical difficulties in uploading them from Photobucket. Bear with me. I'll eventually get it right.
BrullenY-Pipe1.jpg
BrullenY-Pipe2.jpg
(Ah, 3rd time was the charm)
Click to expand...

I actually don't like this design. the ends of the premade flex pipe bottle neck the flow ruining the whole design.
Looks almost as if it's a 1/4" difference.

Just after the Y meets in that larger section, it bottlenecks to go into the flex pipe.

No good! :(

for me anyway.
 
KAOS_3.0 said:
here's what I came up with, it might need to be tweeked down a bit for clearance issues, but I think it's almost equal length and it retains the U shape and the cat. I did two versions, one with a single highflow cat in a test pipe, the other with a big dual inlet cat like found on some V8's in a special "Y/test pipe".

also, a compact dual inlet single outlet muffler/resonator could be placed there if a CAT is not needed and you just wanted to run a turn down behind a front wheel. or heck, you could even run a pair of small resonators with a turn down behind each wheel and you'd have a very loud set of true duals...

I tried to keep within the silhouette of the brullen pipe to keep fitment somewhat realistic, but real measurements of available CATs/flex's/resonators would need to be done to know for sure

lemme know what you think...

brullenypipeimproveddes.jpg
Click to expand...

I think the upper drawing will be more cost effective of the two to build. The problem I see with either design is that the runner going to Bank #2 (radiator side) will dip down a bit too close to the pavement and be at significant risk of getting crushed or caught on something if you drive over a big bump or rather large pothole.

I found another picture of a Brullen Y-pipe that I will post in a separate message (it doesn't want to link into this reply for some reason).
 
Here is the picture of the other Brullen Y-Pipe that I dug out of the archives. This was a preproduction y-pipe with true dual length runners. It does suffer from a poorly designed "Y" coupling. A later design of this exact layout did resolve the "Y" problem (I don't have a picture of that one). This preproduction Y-pipe did not suffer from any fitment issues but it was not commercialized due to being too difficult to fabricate and be profitable. Pretty wild isn't it?

BrullenPreproductionY-pipe.jpg
 
DocStruthers said:
I actually don't like this design. the ends of the premade flex pipe bottle neck the flow ruining the whole design.
Looks almost as if it's a 1/4" difference.

Just after the Y meets in that larger section, it bottlenecks to go into the flex pipe.

No good! :(

for me anyway.
Click to expand...

Well, all I can say is that designed was proven to be successful in terms of sound quality (no drone or rasp) and on the dyno. Unfortunately, all the most important forum messages that discussed its performance cannot be accessed because the old archives can only search 30 pages into a thread; the group buy thread ran ~ 41 pages and the deliverys started at page 30. Some people did run into fitment issues but I don't know exactly what the issues were. My guess is that the pipe sometimes butted into the subframe on the right side or clashed with the power steering hydraulic hoses that run along the lower right side of the subframe. The Contour is a difficult car to design a great exhaust for to say the least.
 
mrspindlelegs said:
I think the upper drawing will be more cost effective of the two to build. The problem I see with either design is that the runner going to Bank #2 (radiator side) will dip down a bit too close to the pavement and be at significant risk of getting crushed or caught on something if you drive over a big bump or rather large pothole.

I found another picture of a Brullen Y-pipe that I will post in a separate message (it doesn't want to link into this reply for some reason).
Click to expand...

I think if the firewall side piping started to turn up towards the header, sooner, it would leave just enough clearance for the rear banks pipe to proceed without dipping to low.


mrspindlelegs said:
Well, all I can say is that designed was proven to be successful in terms of sound quality (no drone or rasp) and on the dyno. Unfortunately, all the most important forum messages that discussed its performance cannot be accessed because the old archives can only search 30 pages into a thread; the group buy thread ran ~ 41 pages and the deliverys started at page 30. Some people did run into fitment issues but I don't know exactly what the issues were. My guess is that the pipe sometimes butted into the subframe on the right side or clashed with the power steering hydraulic hoses that run along the lower right side of the subframe. The Contour is a difficult car to design a great exhaust for to say the least.
Click to expand...

Yea, NO kidding!!
 
i'm definately up for supporting the cause. ill buy one if all goes well, til then i guess ill be adding a few inches to the rear bank lol
 
unfortunately my living situation doesn't allow projects. The garage is full of crap. It is ridiculous. I am looking for my own place. With a one car garage and then I can really jump into this new design but until then, BREMBO's. :(

sorry guys!!
 
I'm thinking about getting a y-pipe really soon too.... I was going to go with the TruBendz, but they don't answer their phone. Anybody have a contact for TruBendz or know where I can get a y-pipe?
 
Pole120 said:
There's a reason we refer to them as Wrongbendz....just sayin.
Click to expand...

Yeah I had to fineness mine a little bit. Once I bent down that mounting point off the oil pan area, it was fine. Well I did have to clearance out the hole a little bit too.

I guess I got a good one. :) sounds pretty good too.... Headers, Wrong Bendz & Magnaflow for a resonator.
 
HA "wrongbendz"

well I just moved again so maybe i'll continue this.

problem is I am looking for a commuter: motorcycle, small pickup, civic crx, etc. lol

once that's acquired i'll finish the new y-pipe design.
 
DocStruthers said:
HA "wrongbendz"

well I just moved again so maybe i'll continue this.

problem is I am looking for a commuter: motorcycle, small pickup, civic crx, etc. lol

once that's acquired i'll finish the new y-pipe design.
Click to expand...

EPIC, yay!

buy either an 80's body protege, a mkII escort, or a saturn sl/sc2... all available for a few hundred bucks and they basically run forever. the sl2 with a manual trans gets like 40mpgs or something crazy... with the protege, the automatic has the tall gears, the manual was tuned for more performance...
 
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