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Old 28th August 2017, 02:52 PM   #1 (permalink)
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My17 + yPipe versus MY14 + ypipe

Hi guys

took delivery of my MY17 GTR yesterday. Guy who had it previously fitted a yPipe but I have no details yet until he gets back at the weekend on brand etc.

I sold my MY14 GTR a few weeks back and it had the Milltek non-res yPipe and I loved the sound.

This MY17 one sounds good too (albeit quieter inside the cabin - probably due to stories on improved soundproofing) but my query is quite specific.

I leave the valve switch open all the time. Between 1500 and 3000 RPM my MY17, even with the yPipe is very quiet (sounds like stock), then its like a valve opening when she hits 3000 RPM - big difference all of a sudden. Below 1500 odd RPM sounds good too - pulling away at easy pace, but then it goes quiet for that range.

Any advice? I used to love popping the revs on the downshift on my old one and to get any same noise sensation now, you have to keep the revs above 3k?
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Old 28th August 2017, 04:46 PM   #2 (permalink)
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Have you driven it with any switch in R mode yet? You won't really notice any subtle exhaust note changes when you do, because the ASE drowns it all out - the internal speaker noises overpower any external noises.

I'm guessing you're hearing the ASE when you say the nosie comes in at 3000 rpm.

Test it by trying a few pulls to the red line in N N N, then switch to R R R and hear the ASE. Once you have selected R ASE stays on even after you change back to N, so you have to switch the car off to return to non ASE.
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Old 29th August 2017, 12:42 PM   #3 (permalink)
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I had a Y pipe on my MY11 GTR which made a big difference to noise (in a good way) and insisted this was put onto the MY17. Sounds better than stock but, inside the cabin it doesn't have the same effect.
I usually drive the car in comfort suspension and R performance. The latter makes a difference. I followed the Mrs last weekend and the noise from outside is considerably more than when behind the wheel.
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Old 29th August 2017, 08:17 PM   #4 (permalink)
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Just need to remember the 2017 has a valve and I understand earlier models didn't(?)

That said, to the OP, when you say "I leave the valve switch open all the time." how are you doing that?

Mine sounds a world apart from being standard and having a Y pipe.
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Old 29th August 2017, 09:53 PM   #5 (permalink)
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Just need to remember the 2017 has a valve and I understand earlier models didn't(?)

That said, to the OP, when you say "I leave the valve switch open all the time." how are you doing that?

Mine sounds a world apart from being standard and having a Y pipe.
The switch by your right knee needs to be up to leave valve open. I think it's an awful valve, it just closes off the left tailpipes.

How are you getting on with the ASE now?
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Old 29th August 2017, 09:57 PM   #6 (permalink)
Trevgtr is eating tyres and drinking 99ron, expensive diet, rapidly approaching 100k miles in R35's
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Btw, it's whole new rear section on the MY17, pre 17 models have stainless steel rear sections with criss cross pipework and 2 small silencers. My17 has titanium rear section with 1 large rear silencer, valve closing off left tailpipes, and apparently flows less.
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Old 29th August 2017, 10:32 PM   #7 (permalink)
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Old 30th August 2017, 08:20 AM   #8 (permalink)
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Quote:
Originally Posted by Trevgtr View Post
The switch by your right knee needs to be up to leave valve open. I think it's an awful valve, it just closes off the left tailpipes.

How are you getting on with the ASE now?
But that switch only works on start up and disengages when you get moving, well mine seems to at least. The only way to keep the valve open seems to be to put the gearbox is R mode?

And yes, having the window down makes a massive difference

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Old 30th August 2017, 08:33 AM   #9 (permalink)
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I've got a milteck y pipe on my my17 and it sounds very throaty compared to my previous 3 35's may be you've got the quieter you pipe because they do a resonated one and non-resonated one.
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Old 31st August 2017, 04:53 PM   #10 (permalink)
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A few friends have said my MY17 with just a Y pipe sounds tremendous from outside, think its just the sound proofing that makes it sound quiet in the cabin
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Old 1st September 2017, 09:37 PM   #11 (permalink)
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I have the resonated pipe on mine and it sounds great. Makes a huge difference.
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Old 2nd September 2017, 01:01 AM   #12 (permalink)
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Don't any of you guys hear the ASE? I know I keep on about it but I guess I'm just amazed no-one seems to care about it or even notice it?
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Old 3rd September 2017, 05:41 AM   #13 (permalink)
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Don't any of you guys hear the ASE? I know I keep on about it but I guess I'm just amazed no-one seems to care about it or even notice it?
To be honest I can't say I have noticed it Trev.
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Old 3rd September 2017, 09:07 PM   #14 (permalink)
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Right, sorry was offline there a bit. Was speaking with the GTR specialist in my "local" (100 miles away!) NHPC.

So basically I leave the valve switch by my right knee open all the time. So the trick, as some have mentioned above, is to have either the gearbox or suspension in R mode (i normally drove in Comfort mode and lever touched the rest). So I can have it in Comfort mode and R for gearbox and drive preferably using the paddles.

It makes such a huge difference and avoids the need for high revs above 3000 rpm when changing up or down. Activating the R mode opens the valve and its quite noticable when driving on that rev range (switching on and off). AND, what I quite like is that on long motorway spins, you can turn it off so the car is not making as much drone.

I've a Milltek non-res yPipe (like the last one) but have to say the noise for me now is better than the last one - there seems to be more of a throaty burble now especially when low in revs.

Love it. Thanks all
Ronan
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Old 4th September 2017, 01:21 AM   #15 (permalink)
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To be honest I can't say I have noticed it Trev.
Thanks for your honesty Will, I suspect most owners don't notice it, which I am truly amazed at because it is one howling noise being played through the speakers! I will try not to mention it again, although I may do a recording one day and put it up on a new thread just to shock you all ha, it's VERY loud.
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Old 4th September 2017, 10:22 AM   #16 (permalink)
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Thanks for your honesty Will, I suspect most owners don't notice it, which I am truly amazed at because it is one howling noise being played through the speakers! I will try not to mention it again, although I may do a recording one day and put it up on a new thread just to shock you all ha, it's VERY loud.
Do you now own one trev or have you driven one a lot?
Be interesting to hear a recording though.
Also I am in my fifties so maybe the hearing is going a bit lol
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