Has anyone else with the WSP Y pipe noticed that it totally fuXors up the exhaust harmonics since it's unequal length? I think it sounds like **** now.

I have the stock cat back and now a semi-hollow cat. I tried it first with a full cat and it sounds about the same both ways.

 

Not only does it *** up the sound, it *** up your performance because of those unequal lenghts...

Apply the science mentioned in the link below to the collector of the y-pipe. Focus on the statments about 'pulses' and 'timing'.
Part 1: http://www.nissanperformancemag.com/november02/nerds/
Part 2: http://www.nissanperformancemag.com/december02/nerds/

 

Sounds like SHEEET if you ask me. I think it's the bigest waste of $$ I have made on my max so far.

 

I didn't read the articles yet but thats kinda my point. The unequal lenghts create havoc on hp and harmonics.

 

I'm sooo glad I was able to find that same info you all are now discovering while I was a 'test monkey'... yet, no body listened... sorry you all had to find out the expensive way.

 

I do not remember reading your post on that. I suppose I expected it to be off to a point but this is just nasty. I doubt mine will live without being introduced to the sawzall and the mig welder before too long.

 

Why were Y pipes on 2k and 2k1 so much better, werent they unequal too ?

 

Your posts on the Y pipe are the exact reason I didn't buy one. When people started to dyno there 02-03's with a y pipe and got very mediocre numbers this only confirmed what you initially discovered. Thanks for saving me the cash.

 

If there even some kind of gain , Im not sure. I ran at the track recently with it and didnt get any improvement, except higher trap speeds of 1-2 mph.

 

thats more $$$ for other things...

 

What other things... ? There aren't many performance mods out for us !

 

no no dude..like other things...not limited to performance...I dunno...ummm RSB for instance, better HID bulbs, head unit, etc...

 

I have most of those already ...

 

Here's what I'm doing with my WSP pipe... I ordered a 2" J-pipe from Jegs, and I'm going to CM Performance. They're going to cut the WSP pipe just before the upward bend for the back pre-cat, add the j-bend, and install a new flange. I'm getting a before & after dyno. So WHEN it proves gains, I'll post info on that, and if you guys want CM to do the cuts/welding on your pipes, I'm sure they will. If this goes good, they hope to team up with another company (not to be mentioned yet, unless he wants to be), to sell their own version of the pipes. This of course, if there's money to be made. I'm sure there's enough of the WSP pipes out there now to be modded.

 

The J pipe idea is what I was talking about. These things need to be equal length.

 

I have been telling people not to buy this pipe for a while. Many have purchased anyway because they see the gains 3.0L get and think it should work for the 3.5L too. I know that’s not what you think but many uninformed do. I also know that it's hard not to try and do something to get better performance with the limited support we have at this time. This just isn't the product to do it with. The stock pipe is just better. We need something that gets rid of the pre's and has a tuned length & diameter. Don't waste any more money by dynoing it too.

Hopefully we as a group we can do a better job of getting the word out to others here so they can save their money and hound HotShot & Stillen for headers.

If you don't feel like hacking it up you can try selling it on Ebay to some fool that doesn't visit the .org

 

But I always see an opportunity when I pop my hood or put the car up on the lift. Acting on what I see is always a different story. I am not optimistic about seeing headers anytime soon so I may have to modify other parts.

 

Let me guess maximaman777 ... you spent the money too?

 

Up until at least 2001, the factory Nissan Y wasn't equal either. But it was THICK as hell. Probably for heat and noise reduction. The main reason the Y is not as quiet as the aftermarket uses tubular steel vs cast iron pieces.

If this the case for the 3.5vq? Unless you bend the hell outa the rear pipe, it's almost impossible to make "equal" length pipes on a transverse mounted V6 FWD car.

 

I was the first one to actually order it after the testing was complete. Its still on the car and my exhaust is very loud after adding the hks rear section. Im not too happy and i might be taking it off soon and redynoing....

 

Have you seen the 2k2/2k3 stock y-pipe? There's a HUGE 180* bend in it, which fortunately is available from Jegs. Following the same measurements as the stock pipe, this mandrel bent j-pipe should balance things out nicely. Again, with the gains expected to come from the collector being bumped up to 2-1/2", not from the downpipes being increased to 2" (as the pre-cats are still 1-5/8").

 

What have I started?

Bring fourth the Lemmings!!!!

 

Soo many threads on this same subject... we should have another forum just for this.

WSP

 

 

Nope, I've kept myself up to date here. Also one of the 1st things I looked at when I got the car was the Y and I thought damn they (Nissan) finally got it right. When Larry did his and posted his dyno numbers I knew then the WS Y was useless steel. Also don't get me wrong I'm not bashing the company, hey I even bought their B pipe today, just this specific product.

QUOTE]Originally posted by SR20DEN
But I always see an opportunity when I pop my hood or put the car up on the lift. Acting on what I see is always a different story. I am not optimistic about seeing headers anytime soon so I may have to modify other parts. [/QUOTE]

Now you have something you don't mind messing with. I hope you can find a way to make something useful with it. Maybe you can make it so you can have an easy drop exhaust so you can try a run with an open exhaust. It'll be loud as hell but hey it doesn't get any free'er than that. **** I'd come watch you do that, NO2 and wide-open exhaust you may have a personal best.

 

This sucks a donkey's belly tail

 

Yup, you da man!

 

OT - how do I put a pic in my signature?

 

[ img ]link to pic[ /img ] but it must be a jpeg or gif file

 

Got it, thanks.

 

Are our precats connected like our main cat is, with a couple of bolts on each side? Is the exhaust manifold and precats one piece or can the precats be removed?

 

Can't say with any certainty but I don't think so.

 

Just maybe the wait for the headers will be worth it...

 

The precats are bolted. They are separate from the manifold. The only downside to removing the precats is the O2 sensors that are after the cat need to be relocated.

 

So what about this. Equal length y pipe and sort of a like a 2inch "straight pipe" for the precats. Then relocate the o2 sensor behind the main cat.

Maybe thats to much work. Might be better to wait for the headers, if they come.

 

So I wasted 200 bucks on a POS mod..It's not like a dumped 4k on a crappy Turbo kit ..

 

That's how the Cali spec one works. Isn't it? The hardest part is finding the right connectors for the O2 sensors to relocate behind the cat.

 

This is for all y-pipes for 02 and 03's????

I don't know how I missed this before

 

ya
the pipes suck
no gains

im gonna go back to stock soon
I just dont want to put a hole in my stock Y pipe for my EGT gauge.. :\

 

I'm glad this post came up. I was thinking of purchasing a WSP Y-Pipe soon. But due to negative results with this mod I have changed my mind and will continue to wait for Header/Y-Pipe combo from either:STILLEN,CATTMAN, or HOTSHOT.