Damn this is a win/win transaction, everybody wins. If you're not in some type of business or negotiation you should be

 

why bother swapping a HR y-pipe.. when u can just put in any other aftermarket y pipe.. which will give u even better gains.. such as the motordyne xyz..

 

Because no one knows which gets better gains. If you knew the gains from both you could calculate the gain vs. price and make your decision.

 

OEM Y pipe is cheaper bang for you buck and has proven to provide some satisfaction for those who have tried them out. XYZ pipe and other after market ones cost around 5~600. Nothing wrong if you want to try it out and let us know the differences.

For me, at this point, I'm not spending the big $$$ for a Y pipe unless I really have to. I'd love to be the sacrificial lamb and see if the XYZ can provide some gains if you're willing to pay for it!!!!

 

If somebody already has a HR y-pipe with some sort of high flow exhaust downstream of it, I have a XYZ pipe I can loan for dyno comparisons.

 

Tiguy99,
So, I assume the Berks will really open up the exhaust from 5k on up, but what's the low end like with the HR-Y pipe? Is it gonna kill it again? I would suspect a bit of low end torque loss correct? I originally added a HFC but reverted back to oem cats because of low end torque loss.

 

Do you have a dyno comparison between the HR ypipe vs the DE ypipe?
Also, what is the cost of an HR Ypipe from nissan?

Here is my dyno comparison between the Stock DE Ypipe vs the MD XYZ pipe. The proof is in the dyno,

 

Tony, that's awesome. I'm not sure if I can be the best candidate but I'd love to be test donor for this. Here's my scenario...

I have a FI exhaust I'm removing this weekend and reverting back to stock. In stock form, I was running Berk HFCs, HR Y pipe and stock midpipe and axelback muffler.

Short term, I may pick up the Greddy SE to keep the exhaust sound level around stock but its in the air at the moment.

If you see my car being a good option to use let me know and I'd be happy to make any arrangement to test out the XYZ.

When I go FI, I'm strongly considering the XYZ with cat option as an alternative to my Berk HFCs. That's why I'm interested and in that case I would spend the extra 600 for it because of its functionality to fit my needs. (If I get a kit that requires I remove my HFCs, Illinois Emissions etc)

Nismou, I'm not sure how adding my HFCs effected my torque. I already felt a lil boost in torque due to first installing my MD 5/16 plenum spacer/ztube and then the HR Y pipe.

After putting on the Berks, the car felt a little more peppier across the board but's about it. Nothing earth shattering.

The biggest thing I noticed was the sound effect for my stock exhaust was a little deeper than it was after I installed the HR Y pipe. Here's a video clip I recorded the day GRD install my HFCs

Windows open

<embed width="448" height="361" type="application/x-shockwave-flash" wmode="transparent" src="http://i313.photobucket.com/player.swf?file=http://vid313.photobucket.com/albums/ll365/tiguy99/Berk%20HFC%20clips/MOV00404.flv">

windows closed (ignore the digital sounds...the camera added those)

<embed width="448" height="361" type="application/x-shockwave-flash" wmode="transparent" src="http://i313.photobucket.com/player.swf?file=http://vid313.photobucket.com/albums/ll365/tiguy99/Berk%20HFC%20clips/MOV00401.flv">

Did you reset your ECU after you had the HFCs installed? One thing I did was reset the ECU using the pedal method each time I did a breather mod so the ECU can quickly adapt to eac mod increment if that makes sense.

For me it helped a lot. The car knew something new was there and didn't hesitate to sync with it.

Unfortunately Reality, I didn't get my first baseline dyno until this past weekend @ SP. By then I had removed the Y pipe and replaced the exhaust with the Fast Intentions. I came in just under 250whp on their heart breaker mustang dyno.
Keep in mind I don't have Osiris.

As for the HR Y pipe vs DE Y pipe #s, keep your eyes peeled to this thread. We have some guys who are about to dyno their cars with just the HR Y pipe mod alone.

That should help give us all an idea just how much of a gain there is with this newer freer flowing Y pipe vs the older more restrictive DE design...as for the cost I paid 100 for mine used. Last time I checked the dealer cost (if you decide to go that route) is around the same price as MD's XYZ.

The choice is clear as to what you should do if you were actually considering buying your Y pipe there

Any other questions, please feel free to ask!

 

no rasp with test pipes, i`m with HFC and i still have rasp at WOT
WHERE DID I GO WRONG ?

 

Thanks, but I am very happy with the MD xyz pipe. It made great gains on its own. Although having seen the HR ypipe in person, I don't see how it could flow as well as the Motordyne xyz pipe.
In for dyno's!

 

So whats the going rate on a hr y-pipe? I have one just sitting in my backyard.

 

looks like you lose torque between 2k - 2.5k rpm

 

Yeah, its a give and take.. I loose on the low end.. only to gain in mid/upper rpms..
Considering that part of the rpm band is almost never in use when going WOT.. its not really a concern.

This question was asked of tony over on driver.. here was his technical reply

 

Tiguy,

Let me know when you get the Greddy SE installed.

BTW, you just installed your FI exhaust not even 2 weeks ago it seems. How come you are taking it off so soon?

Tony

 

will i must make one thing clear ,,i`m talking about how good is the HR Y Pipe with DE 350Z NOT to say it`s better than the MD XYZ .
the only good thing about it over the XYZ, its cheap with a good change in preformance buttdyno .
+1 for MD products ,all the best

Anan

 

+1 MD stuff is top notch. No complaints here


You're sitting on gold...install it and find out...if not, quite a few folks on G35driver will take it off your hands right now.

Will do. As for the exhaust, for me I found the volume level too loud for my daily use.

I love the sound pitch and complements I get from others. Its just the volume level of it combined with the HFCs is too loud for me.

Scale of 1-10, 10 being the highest, I think its about 7.5 maybe. Stock is about 3.5ish. FI w/o HFCs is around a 5. That would be ideal for me, but taking off my HFCs and trying to find someone who has stock cats then going through the hassle of swapping those doesn't seem like a plan I want to do.

I dunno. I'm still on the fence because I like it a lot but I like my stock exhaust sound/volume level too. Tony, I've flipped a coin like 8x about this already

 

what is happening with this thread??? lol

 

For those interested in this Y pipe, Check out my Sale!! Got 2 left
https://my350z.com/forum/engine/4363...hr-y-pipe.html
Can also install if in SOCAL

 

I just bought a HR y-pipe today for $60 bucks. Hopefully it makes things more linear on the power band. I'm going from Berk HFC, AAM y-pipe, Agency single exit to Berk HFC, HR y-pipe, DE mid pipe and muffler. It would be great to feel the exhaust open up a bit more again without the race car loudness! By the way my Agency exhaust is for sale on the boards if anyone is interested.