Nissan 370Z Forum
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Nissan 370Z Forum (http://www.the370z.com/)
-   Intake/Exhaust (http://www.the370z.com/intake-exhaust/)
-   -   ART PIPES VS LTH (F.I or PPE) (http://www.the370z.com/intake-exhaust/41211-art-pipes-vs-lth-f-i-ppe.html)

Methodical4u 08-18-2011 11:51 PM
Quote:
Originally Posted by Motordyne (Post 1268748)
At least on the 350Z, the XYZ pipe has out dynod everything it has been independently dyno tested against. So if it happened on the 370Z it wouldn't exactly be a surprise.
I know i'll be getting the XYZ pipe... I just want to open that exhaust up as much as I can, but I need to be able to change out the ART pipes in case I can't pass emissions...

Tony, do you think the HFC in the XYZ would be enough to pass an emissions test?

chuckd05 08-19-2011 12:47 AM
Quote:
Originally Posted by Arnold K. (Post 1268058)
Has anybody ever dynoed LTH as their LAST mod as opposed to their 1st or 2nd? We all know that the first mod on our cars will always be the highest, no matter what it is and then it goes down from there.

I'd like to see someone with intake, exhaust, TP/ART/HFCs, and tune dyno their car before installing the LTH. I personally have a feeling, the difference won't be very big at all, especially if you're replacing the ART Pipes for LTH.

I did, but it was with an addition of a flywheel and a tweaking of my tune that got rich for some reason, so its kind of a bad example... but i gained 21 whp but I think a lot came from how rich my car was when it went in there...

Motordyne 08-19-2011 02:29 PM
Quote:
Originally Posted by Methodical4u (Post 1269423)
I know i'll be getting the XYZ pipe... I just want to open that exhaust up as much as I can, but I need to be able to change out the ART pipes in case I can't pass emissions...

Tony, do you think the HFC in the XYZ would be enough to pass an emissions test?
It would probably pass the sniffer test but it depends on what your local laws require.

Federal law requires that only stock catalytic converters be used.

Motordyne 08-19-2011 02:30 PM
Quote:
Originally Posted by chuckd05 (Post 1269457)
I did, but it was with an addition of a flywheel and a tweaking of my tune that got rich for some reason, so its kind of a bad example... but i gained 21 whp but I think a lot came from how rich my car was when it went in there...
How rich was it?

indyn 08-21-2011 01:34 PM
Tony,

How does ART pipes make more gains over other resonated or non test pipes?

Methodical4u 08-21-2011 05:50 PM
Quote:
Originally Posted by chuckd05 (Post 1269457)
I did, but it was with an addition of a flywheel and a tweaking of my tune that got rich for some reason, so its kind of a bad example... but i gained 21 whp but I think a lot came from how rich my car was when it went in there...
I'm curious how rich it was as well... 21 whp with the LTH's and a flywheel? I would have guessed a lot more than that... didn't the Berk HFC's make like 15 whp (granted I don't know if this was independent tested or not) on an otherwise stock car?

Motordyne 08-22-2011 11:16 AM
Quote:
Originally Posted by indyn (Post 1272357)
Tony,

How does ART pipes make more gains over other resonated or non test pipes?
Control of acoustic resonances.

Similar to what headers do but achieved in a different manner, resonance Q, frequency and magnitude. There is much more to how it works though.

A lot of unpublished R&D testing on the effects of the ART pipes on 350Z was part of the ART pipe patent application. There is still much more to explore now that VVEL is part of the equation. I can't wait to get hold of exhaust cam control to tune it to the ART pipes. If it is anything like the 350 engine, amazing things can happen on the dyno when the exhaust valves can be tuned to the ART pipes.

Motordyne 08-22-2011 11:19 AM
Would anyone like to conduct a fair and independent test comparing the ART pipes to Long Tube Headers?

It would make an interesting test for sure.

daisuke149 08-22-2011 11:20 AM
I have your ART Pipes.. i do not have LTH...

: /

ChipsWithDips 08-22-2011 11:31 AM
Quote:
Originally Posted by Motordyne (Post 1273704)
Control of acoustic resonances.

Similar to what headers do but achieved in a different manner, resonance Q, frequency and magnitude. There is much more to how it works though.

A lot of unpublished R&D testing on the effects of the ART pipes on 350Z was part of the ART pipe patent application. There is still much more to explore now that VVEL is part of the equation. I can't wait to get hold of exhaust cam control to tune it to the ART pipes. If it is anything like the 350 engine, amazing things can happen on the dyno when the exhaust valves can be tuned to the ART pipes.
The exhaust cams on VQ37VHR are static. There is nothing to control, no phasing of lift adjustments. Only way to change that would be custom ground camshaft, which no one is producing at the moment as far as I know.

Only intake cams have VVEL and IVT.


http://i.imgur.com/ZT9As.png

indyn 08-22-2011 11:50 AM
Thanks Tony.

Exhaust cam phasing is controllable using Uprev but from what I been told it doesn't make much difference until intake cam phasing (or controlled by VVEL) is tunable unless it helps with your product.
Maybe I should confirm again with my tuner is this is doable and there might be little bit more gains.

Footloose301 12-10-2012 05:46 PM
Has anyone performed this test?!


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