ART PIPES VS LTH (F.I or PPE)

Methodical4u · 08-18-2011, 03:02 AM

Quote:

Originally Posted by Motordyne

The XYZ HFC drops 3-4 HP relative to the XYZ resonator or XYZ straight pipe.
Normally a HFC would drop more than 3-4 HP relative to a test pipe but the XYZ HFC is so much farther away from the engine there is less pressure drop and power loss.

losing power sucks

ScGRaceR · 08-18-2011, 03:10 AM

theDreamer · 08-18-2011, 08:18 AM

Quote:

Originally Posted by Motordyne

What are you currently using in the location for the stock cats? Stock cats, HFC's or test pipes?

Currently I am o stock header/cats as I decide what I plan to do. I am thinking a RTP with stock headers and maybe a whole new exhaust.

wstar · 08-18-2011, 08:54 AM

Another factor to think about: You can get away with running the stock ECU tune with most simple bolt-ons (e.g. HFCs, etc), but a full set of intake/exhaust boltons including LTH pretty much requires a dyno tune. I know because I'm running LTH on my stock tune right now (temporarily), and the bottom end of the rev range is horrid once the engine is heat-soaked, it's worse than stock

b1adesofcha0s · 08-18-2011, 08:55 AM

Quote:

Originally Posted by Motordyne

Intake comes after the exhaust. As far as HFC Vs resonator on the XYZ pipe... I would suggest the HFC. HFC because it will at least clean up the smell. For some people this is important.

The smell of test pipes or ART pipes doesn't bother me at all but it is an issue for some. It depends a lot on your personal preference and smog regulations.

Any idea how far you guys are from releasing the intakes? I was going to buy intakes sometime next year, probably around February for my birthday. Was going to go with the Stillen G3's, but if your's are being released sometime after that I will probably wait to see the results before making my purchase.

Motordyne · 08-18-2011, 10:11 AM

Quote:

Originally Posted by Methodical4u

losing power sucks

That's the cost of having a catalytic converter in the XYZ pipe.
Put that same catalytic converter into test pipes near the engine (like regular HFC's) and it drops 6+ HP.

indyn · 08-18-2011, 10:14 AM

Quote:

Originally Posted by Motordyne

Exactly. That is the primary reason for putting the HFC on the XYZ pipe.

Secondly, it makes more power by moving the HFC away from the engine.

Thirdly, it greatly increases the life expectancy of the HFC because exhaust gas temperature is about 300'F-500'F lower at the end of the merge collector.

Tony,
You don't seem to have a bung for the o2 sensor in the XYZ pipe, can you get by without placing it after HFC? And do the ART pipes attach to the factory exhaust mounting bracket?

Motordyne · 08-18-2011, 10:15 AM

Quote:

Originally Posted by theDreamer

Currently I am o stock header/cats as I decide what I plan to do. I am thinking a RTP with stock headers and maybe a whole new exhaust.

Stay in touch as you change your setup or plan to make changes. Particularly if you change the whole exhaust too. I'll have something very interesting for you to dyno test with your SC.

Motordyne · 08-18-2011, 10:19 AM

Quote:

Originally Posted by indyn

Tony,
You don't seem to have a bung for the o2 sensor in the XYZ pipe, can you get by without placing it after HFC? And do the ART pipes attach to the factory exhaust mounting bracket?

There is no bung on the XYZ. Its not needed if you have ART pipes where they have the bung/non-fowler built in. With the CEL kept off, there is no need for additional bungs unless you have some kind of special set up like what is typically seen with forced induction systems.

NYBladeZ · 08-18-2011, 10:54 AM

Currently running F.I. LTH's with the GT Haus exhaust. I love it! Granted the LTH's won't work with a twin turbo setup but then again I don't know if the art pipes would either due to the increase in heat, maybe Tony can chime in on that.

Also Tony, I'm using the GTHaus front Y-pipe it comes out into a 3" collector that connects to the 2nd mid pipe, is your xyz resonated pipe also a 3" outlet? Also do you think I'll lose any hp if I went from the unresonated pipe to your resonated pipe?

AlphaSnacks · 08-18-2011, 11:47 AM

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.

theDreamer · 08-18-2011, 11:51 AM

Quote:

Originally Posted by Arnold K.

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.

The F.I. LTH thread has some a dyno result like that, so does Semtex in his journal.

Motordyne · 08-18-2011, 12:49 PM

Quote:

Originally Posted by NYBladeZ

Currently running F.I. LTH's with the GT Haus exhaust. I love it! Granted the LTH's won't work with a twin turbo setup but then again I don't know if the art pipes would either due to the increase in heat, maybe Tony can chime in on that.

Also Tony, I'm using the GTHaus front Y-pipe it comes out into a 3" collector that connects to the 2nd mid pipe, is your xyz resonated pipe also a 3" outlet? Also do you think I'll lose any hp if I went from the unresonated pipe to your resonated pipe?

Heat isn't a problem. Sometimes the EGT can actually be lower on FI because the optimum F/A ratio is typically much lower.

The XYZ outlet is 3.0" diameter and there is no loss at all with the resonator. I wouldn't be surprised if you made more power with the XYZ pipe.

NYBladeZ · 08-18-2011, 04:34 PM

Quote:

Originally Posted by Motordyne

The XYZ outlet is 3.0" diameter and there is no loss at all with the resonator. I wouldn't be surprised if you made more power with the XYZ pipe.

That's a bold statement, care to explain why you think that could happen?

Motordyne · 08-18-2011, 04:54 PM

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.

08-18-2011, 03:10 AM	#32 (permalink)
ScGRaceR Enthusiast Member Join Date: Mar 2010 Location: 33908 Posts: 382 Drives: 2010 Nismo,2008 R32 Rep Power: 15	Z_Enthusiast likes this. __________________ 2010 PW Nismo: GT-R Start / Stop \| Kenwood Navi / DVD \| Escort X50 \| F.I 18' CF \| F.I Resonated Test Pipes \| PasswordJDM \| Post MAF Tubes \| K&N Drop In's 297 RWHP 9/25/11 WTB SPARE RIM TIRE. PM ME

08-18-2011, 08:54 AM	#34 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3594	Another factor to think about: You can get away with running the stock ECU tune with most simple bolt-ons (e.g. HFCs, etc), but a full set of intake/exhaust boltons including LTH pretty much requires a dyno tune. I know because I'm running LTH on my stock tune right now (temporarily), and the bottom end of the rev range is horrid once the engine is heat-soaked, it's worse than stock __________________ 7AT Track Car! Journal thread / Car setup details

08-18-2011, 10:54 AM	#40 (permalink)
NYBladeZ A True Z Fanatic Join Date: Apr 2009 Location: New York Posts: 2,158 Drives: Lotus Exige S Rep Power: 20	Currently running F.I. LTH's with the GT Haus exhaust. I love it! Granted the LTH's won't work with a twin turbo setup but then again I don't know if the art pipes would either due to the increase in heat, maybe Tony can chime in on that. Also Tony, I'm using the GTHaus front Y-pipe it comes out into a 3" collector that connects to the 2nd mid pipe, is your xyz resonated pipe also a 3" outlet? Also do you think I'll lose any hp if I went from the unresonated pipe to your resonated pipe? __________________ 2009 Carbon Fiber/Red 370z aka Trish: Sports Package, Meisterschaft full catback, Fast Intentions Longtube Headers, Injen Long Tube Intakes, UpRev Tune: Sold 2008 Lotus Exige S Club Racer aka Bella, always leaves me smiling

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08-18-2011, 11:47 AM	#41 (permalink)
AlphaSnacks A True Z Fanatic Join Date: Jan 2010 Location: Windermere, FL Posts: 1,618 Drives: '13 XKR-S, '10 370Z Rep Power: 18	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.

08-18-2011, 04:54 PM	#45 (permalink)
Motordyne Enthusiast Member Join Date: Nov 2008 Location: Los Angeles Posts: 384 Drives: Z Rep Power: 17	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.