Motordyne XYZ-Pipe (Pilot Production)
07-21-2008, 09:37 AM
#101
Originally Posted by Vq.turbo.DremZ
how much did the diffuser affect the powerband in comparison to regular canister style mufflers and the ones you will be offering??
In all of the research I've done, I've found a collection of various small increases. 1/2 a HP here, 1/2 a HP here, 1-2 HP there, a little more TQ boost on another part of the curve and so forth.
With several small increases available, why not utilize them?
Note: where the diffuser is used also makes a difference. I'll go more into this later.
I also found areas of trade. For example, the primary tubes on the collector... I experimented with 2", 2.25" and 2.5" while holding all other variables constant.
Each different diameter had its strong points, it took a little bit of a judgement call to decide the optimum here, but 2.5" primaries had the best overall curve.
2.25" was good too, but it lost 2 HP up top. 2.25" didn't really seem like an acceptable trade.
07-21-2008, 12:45 PM
#102
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Originally Posted by Hydrazine
I wouldn't bother with it if that's all you intended to do. Its not untill you have a fully modified exhaust that it is worth considering.
Optimizing the collector merge point is a dyno subtlty that also feels good on the throttle response. Its not MREV2 like gains.
The XYZ pipe outlet is 3". The stock midpipe is 2.5".
The sudden contraction from 3" to 2.5" would likely negate any gains made.
Optimizing the collector merge point is a dyno subtlty that also feels good on the throttle response. Its not MREV2 like gains.
The XYZ pipe outlet is 3". The stock midpipe is 2.5".
The sudden contraction from 3" to 2.5" would likely negate any gains made.
i was going to switch out my nismo y pipe for the XYZ pipe but im gathering from this response that i shouldnt even bother with it? No sound difference?
in your first post it said that the resonator should improve the sound? But should i not bother with it if i was just gonna get the XYZ with resonator?
07-21-2008, 12:49 PM
#103
Originally Posted by Hydrazine
RCdash,
Will do.
There will be the ultimate dual FI exhaust system for the very high HP applications. This one will be saved for last.
After it comes out, it will have to be tested and compared for fitment and dyno results against all other FI exhaust systems on a very high HP Z or G.
Will do.
There will be the ultimate dual FI exhaust system for the very high HP applications. This one will be saved for last.
After it comes out, it will have to be tested and compared for fitment and dyno results against all other FI exhaust systems on a very high HP Z or G.
Honestly, I'm tired of the loud exhaust drone while cruising around town (2k rpms) and want something quiet that still flows. No fumes + no noise + turbo power = 0 exhausts to choose from. I'm hoping someone on this planet comes up with a product to fill this empty niche...
07-21-2008, 01:13 PM
#104
Originally Posted by scmtkings4
i was going to switch out my nismo y pipe for the XYZ pipe but im gathering from this response that i shouldnt even bother with it? No sound difference?
in your first post it said that the resonator should improve the sound? But should i not bother with it if i was just gonna get the XYZ with resonator?
in your first post it said that the resonator should improve the sound? But should i not bother with it if i was just gonna get the XYZ with resonator?
07-21-2008, 01:28 PM
#105
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Originally Posted by scmtkings4
i was going to switch out my nismo y pipe for the XYZ pipe but im gathering from this response that i shouldnt even bother with it? No sound difference?
in your first post it said that the resonator should improve the sound? But should i not bother with it if i was just gonna get the XYZ with resonator?
in your first post it said that the resonator should improve the sound? But should i not bother with it if i was just gonna get the XYZ with resonator?
i think this is what tony meant when he said it will improve the sound.. to me, no rasp, is the best sound improvement there is.
Last edited by ginobetterfly; 07-21-2008 at 01:30 PM.
07-21-2008, 01:29 PM
#106
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Originally Posted by scmtkings4
i was going to switch out my nismo y pipe for the XYZ pipe but im gathering from this response that i shouldnt even bother with it? No sound difference?
in your first post it said that the resonator should improve the sound? But should i not bother with it if i was just gonna get the XYZ with resonator?
in your first post it said that the resonator should improve the sound? But should i not bother with it if i was just gonna get the XYZ with resonator?
I really liked the stock cats plus nismo catback sound, but after I added HFC, the exhaust note I was trying to keep kind of disappeared. I'm hoping this resonator will cure the slight rasp and popping.
07-21-2008, 01:39 PM
#107
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Originally Posted by Allen331
I have the nismo catback with the Berk metallic HFC. As of right now, I get slight rasp and some popping, which I assume the resonator will fix. If you have a stock cats with the nismo exhaust, keep it that way...it sounds like sex.
I really liked the stock cats plus nismo catback sound, but after I added HFC, the exhaust note I was trying to keep kind of disappeared. I'm hoping this resonator will cure the slight rasp and popping.
I really liked the stock cats plus nismo catback sound, but after I added HFC, the exhaust note I was trying to keep kind of disappeared. I'm hoping this resonator will cure the slight rasp and popping.
i would be EXTREMELY interested in hearing the XYZ pipe w/ resonator, nismo muffler and HFCs or test pipes... according to tony, the resonator might just get rid of the rasp thats experienced even with test pipes!!
Last edited by ginobetterfly; 07-21-2008 at 01:42 PM.
07-21-2008, 02:51 PM
#108
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I'll be doing some of the testing. I have a setup that rasps, and I'll compare sounds and post data and videos when its all done with a resonator.. Just wait and see!
07-21-2008, 03:37 PM
#109
Originally Posted by Allen331
I have the nismo catback with the Berk metallic HFC. As of right now, I get slight rasp and some popping, which I assume the resonator will fix. If you have a stock cats with the nismo exhaust, keep it that way...it sounds like sex.
I really liked the stock cats plus nismo catback sound, but after I added HFC, the exhaust note I was trying to keep kind of disappeared. I'm hoping this resonator will cure the slight rasp and popping.
I really liked the stock cats plus nismo catback sound, but after I added HFC, the exhaust note I was trying to keep kind of disappeared. I'm hoping this resonator will cure the slight rasp and popping.
There is a slight rasp, but it's there for a few hundred rpm's and then it dissappears. You guys must mean serious business for getting the exact tone you desire. I don't blame you, it's addicting.
I do however wonder if I can get rid of the hissing I hear everytime I drive the car with the windows down.
07-21-2008, 03:56 PM
#110
Originally Posted by scmtkings4
i was going to switch out my nismo y pipe for the XYZ pipe but im gathering from this response that i shouldnt even bother with it? No sound difference?
in your first post it said that the resonator should improve the sound? But should i not bother with it if i was just gonna get the XYZ with resonator?
in your first post it said that the resonator should improve the sound? But should i not bother with it if i was just gonna get the XYZ with resonator?
I wouldn't bother putting it on an otherwise stock system.
The stock Mid pipe is 2.5". And sudden contractions in the system tend to add rasp. So connecting a resonated XYZ to a stock midpipe would be pointless.
That's a very different situation from what you have.
In your case, you have a 3" midpipe so yes, it will certaintly improve the sound.
If you have test pipes or HFC's on the Nismo exhaust, yes, the resonated XYZ will make a clear reduction in rasp.
Last edited by Hydrazine; 07-21-2008 at 04:03 PM.
07-22-2008, 09:29 PM
#115
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Tony
Let me know once the Dual 3" with X pipe is released or if you need someone.
I might not be high HP(425WHP) but definitely like the way the exhaust comes apart with the V-Clamps.
Current setup:
APS TT
Fast Intentions 300cell HFC
Greddy EvoTT true dual 2.75"
Also I see your saying that with the Y pipe that you offer you can
have the cat at that location and use test pipes further up where the
stock cats go but wouldn't that in turn set off O2 CEL's since the O2
sensors would not be relocated.
Let me know once the Dual 3" with X pipe is released or if you need someone.
I might not be high HP(425WHP) but definitely like the way the exhaust comes apart with the V-Clamps.
Current setup:
APS TT
Fast Intentions 300cell HFC
Greddy EvoTT true dual 2.75"
Also I see your saying that with the Y pipe that you offer you can
have the cat at that location and use test pipes further up where the
stock cats go but wouldn't that in turn set off O2 CEL's since the O2
sensors would not be relocated.
Last edited by Glex25; 07-22-2008 at 09:35 PM.
07-22-2008, 09:43 PM
#116
Originally Posted by Glex25
Tony
Let me know once the Dual 3" with X pipe is released or if you need someone.
I might not be high HP(425WHP) but definitely like the way the exhaust comes apart with the V-Clamps.
Current setup:
APS TT
Fast Intentions 300cell HFC
Greddy EvoTT true dual 2.75"
Also I see your saying that with the Y pipe that you offer you can
have the cat at that location and use test pipes further up where the
stock cats go but wouldn't that in turn set off O2 CEL's since the O2
sensors would not be relocated.
Let me know once the Dual 3" with X pipe is released or if you need someone.
I might not be high HP(425WHP) but definitely like the way the exhaust comes apart with the V-Clamps.
Current setup:
APS TT
Fast Intentions 300cell HFC
Greddy EvoTT true dual 2.75"
Also I see your saying that with the Y pipe that you offer you can
have the cat at that location and use test pipes further up where the
stock cats go but wouldn't that in turn set off O2 CEL's since the O2
sensors would not be relocated.
07-23-2008, 01:40 AM
#117
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Originally Posted by Hydrazine
No. I'll have a fix for that once the MD test pipes come out.
Last edited by jammin; 07-23-2008 at 11:02 PM.
07-23-2008, 03:48 AM
#118
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thats the other one, and that wont come out for awhile, so might as well forget about it, and just be suprised when it comes out.
he said, the gains are better than the orignal protoype. they are so great posting the gains might get flamed because they are so good.
he said, the gains are better than the orignal protoype. they are so great posting the gains might get flamed because they are so good.
Last edited by FAIRLADYZ_MANnE; 07-23-2008 at 03:57 AM.
07-23-2008, 03:56 AM
#119
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Originally Posted by Fluid1
I hope you're racing on the track.
More hp usually means you're going to notice a difference in a race if you drive well.
If you're worried about what to say to other people asking about your mods, you're too juvenile for this discussion anyway.
More hp usually means you're going to notice a difference in a race if you drive well.
If you're worried about what to say to other people asking about your mods, you're too juvenile for this discussion anyway.
i should have known the type of people who drive Z's
anyway.
i guess it will just be like all the other exhaust in performance,
some people look for sound
some people look for looks
I look for power, even if its just a bit more than other exhaust systems.
hey tony, would there be any chance to throw up a dyno comparasion of stock exhaust and then yours, im pretty sure everyone on here, will believe you, mrev and spacer is gold.
07-23-2008, 04:21 AM
#120
Originally Posted by FAIRLADYZ_MANnE
hey tony, would there be any chance to throw up a dyno comparasion of stock exhaust and then yours, im pretty sure everyone on here, will believe you, mrev and spacer is gold.