Straight Pipe?

CWofRR · 06-18-2010, 04:30 PM

Anyone got a straight pipe on there Z?

Vegitto-kun · 06-18-2010, 04:37 PM

A rally driver here is building himself a straight exhaust for his 370 to use for rally.

no cats, just a straight pipe to the back.

if I ever get the chance to record it I will

Big J · 06-18-2010, 10:11 PM

I think there are a few people here That have done this. I think I ran across some vids last night of it so I'll try and find the link for you.

NewlyIMPORTed · 06-18-2010, 10:40 PM

i took off the muffler one time kept it for a day and couldnt handle the drone but now i have the agency power its 12" resonators with 12" mufflers i believe and no cross over and it sounds very aggressive with no drone

CWofRR · 06-19-2010, 03:02 AM

Yeah if you guys can get me clips that would be great, cause I'm thinking of getting straight pipes. But I just can't seem to find any videos of 370s with it.

Jordo! · 06-19-2010, 09:07 AM

The extra flow may or may not be helpful... if there's already optimal cylinder filling/emptying given the factory valve timing, extra exhaust flow might rob you some of some low end grunt.

It may or may not be worthwhile only with a different intake set-up (and probably need a retune too).

With that in mind...

Do the x-pipes provide two separate paths or do they join in the middle and then split again?

Any dynos that show comparison between the X and Y pipes?

NewlyIMPORTed · 06-19-2010, 10:03 AM

x pipe joins in the middle and goes back into the pipes

Vegitto-kun · 06-19-2010, 10:40 AM

The rally version 370's exhaust is apparently gonna be finished next week.

I am curious.

They also completely redid the engine to 4.5 liters, custom ECU, completely removed VDC,ABS and other stuff.

I want to drive it.

Jordo! · 06-19-2010, 02:42 PM

Quote:

Originally Posted by NewlyIMPORTed

x pipe joins in the middle and goes back into the pipes

Are there dyno comparisons of the difference between X and Y on power output? I could swear I read a thread where someone claimed the Y made more power (at least N/A).

Quote:

Originally Posted by Vegitto-kun

The rally version 370's exhaust is apparently gonna be finished next week.

I am curious.

They also completely redid the engine to 4.5 liters, custom ECU, completely removed VDC,ABS and other stuff.

I want to drive it.

Oh wow -- well the extra 2.2 ltrs of displacement will certainly be able to use a much better flowing intake and exhaust.

I hope they can effectivley retune VVEL too -- that's going to be critical for making optimal power.

theDreamer · 06-19-2010, 02:47 PM

Quote:

Originally Posted by Jordo!

Are there dyno comparisons of the difference between X and Y on power output? I could swear I read a thread where someone claimed the Y made more power (at least N/A).

Oh wow -- well the extra 2.2 ltrs of displacement will certainly be able to use a much better flowing intake and exhaust.

I hope they can effectivley retune VVEL too -- that's going to be critical for making optimal power.

If the car is a pure race car VVEL will just be turned off especially if they are running a 4.5L engine with custom ECU, makes it easier for a car like that.
On the X v. Y v. H pipe setup, there is not exact answer. Similar to dyno machines, they all vary and can perform very well. Usually it comes down to sound based on the muffler, bends, etc. Most well build exhaust systems will all give about the same amount of power.

Vegitto-kun · 06-19-2010, 02:49 PM

Quote:

Originally Posted by Jordo!

Are there dyno comparisons of the difference between X and Y on power output? I could swear I read a thread where someone claimed the Y made more power (at least N/A).

Oh wow -- well the extra 2.2 ltrs of displacement will certainly be able to use a much better flowing intake and exhaust.

I hope they can effectivley retune VVEL too -- that's going to be critical for making optimal power.

Don't know about VVEL, will have to ask next time I am there.

I do know that they bought the G3 intake.

first time I came there the 370 was just bare. everything stripped out nothing but the body.

Jordo! · 06-19-2010, 02:51 PM

^^^ I could see turning off the VVEL on a turboed car where you might want max overlap, but N/A, I think it's really going to hold them back.

Daishi · 06-19-2010, 02:53 PM

It depends on how the exhaust is Designed but 99.9% of the time the x pipe provides the most gains.

theDreamer · 06-19-2010, 02:57 PM

Quote:

Originally Posted by Jordo!

^^^ I could see turning off the VVEL on a turboed car where you might want max overlap, but N/A, I think it's really going to hold them back.

Depending on the league and requirements, power might be easy for the 3.7L against the other cars. Removing VVEL from the equation can help for solving engine problems and quick fixes during a race. Remember power is only a percent of what is needed to win a race.

Vegitto-kun · 06-19-2010, 05:49 PM

I think the last thing you would want is a 800 HP monster driving on a rally track

06-18-2010, 04:30 PM	#1 (permalink)
CWofRR Base Member Join Date: Mar 2010 Location: Cali Posts: 116 Drives: herra slow Rep Power: 15	Straight Pipe? Anyone got a straight pipe on there Z? __________________ IG impwks_wes

06-18-2010, 10:40 PM	#4 (permalink)
NewlyIMPORTed A True Z Fanatic Join Date: May 2009 Location: Kennesaw, GA Posts: 1,109 Drives: 11 STI Sedan Rep Power: 17	i took off the muffler one time kept it for a day and couldnt handle the drone but now i have the agency power its 12" resonators with 12" mufflers i believe and no cross over and it sounds very aggressive with no drone __________________ 2011 WRX STICobb Accessport, Nameless Performance exhaust, COBB SF Intake, COBB downpipe, 20% tint, Work Emotion XD9's

06-19-2010, 03:02 AM	#5 (permalink)
CWofRR Base Member Join Date: Mar 2010 Location: Cali Posts: 116 Drives: herra slow Rep Power: 15	Yeah if you guys can get me clips that would be great, cause I'm thinking of getting straight pipes. But I just can't seem to find any videos of 370s with it. __________________ IG impwks_wes

06-19-2010, 09:07 AM	#6 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 417	The extra flow may or may not be helpful... if there's already optimal cylinder filling/emptying given the factory valve timing, extra exhaust flow might rob you some of some low end grunt. It may or may not be worthwhile only with a different intake set-up (and probably need a retune too). With that in mind... Do the x-pipes provide two separate paths or do they join in the middle and then split again? Any dynos that show comparison between the X and Y pipes? __________________ Enjoy it. Destroy it.

06-19-2010, 10:03 AM	#7 (permalink)
NewlyIMPORTed A True Z Fanatic Join Date: May 2009 Location: Kennesaw, GA Posts: 1,109 Drives: 11 STI Sedan Rep Power: 17	x pipe joins in the middle and goes back into the pipes __________________ 2011 WRX STICobb Accessport, Nameless Performance exhaust, COBB SF Intake, COBB downpipe, 20% tint, Work Emotion XD9's

06-18-2010, 04:37 PM	#2 (permalink)
Vegitto-kun A True Z Fanatic Join Date: Feb 2010 Location: USA Posts: 2,011 Drives: 09 370Z Rep Power: 262	A rally driver here is building himself a straight exhaust for his 370 to use for rally. no cats, just a straight pipe to the back. if I ever get the chance to record it I will

06-18-2010, 10:11 PM	#3 (permalink)
Big J Track Member Join Date: Jun 2010 Location: Memphis Posts: 905 Drives: 370z Rep Power: 15	I think there are a few people here That have done this. I think I ran across some vids last night of it so I'll try and find the link for you.

06-19-2010, 10:40 AM	#8 (permalink)
Vegitto-kun A True Z Fanatic Join Date: Feb 2010 Location: USA Posts: 2,011 Drives: 09 370Z Rep Power: 262	The rally version 370's exhaust is apparently gonna be finished next week. I am curious. They also completely redid the engine to 4.5 liters, custom ECU, completely removed VDC,ABS and other stuff. I want to drive it.

06-19-2010, 02:51 PM	#12 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 417	^^^ I could see turning off the VVEL on a turboed car where you might want max overlap, but N/A, I think it's really going to hold them back. __________________ Enjoy it. Destroy it.

06-19-2010, 02:53 PM	#13 (permalink)
Daishi Track Member Join Date: Jul 2009 Location: NJ Posts: 683 Drives: 09 370z 6Speed Rep Power: 16	It depends on how the exhaust is Designed but 99.9% of the time the x pipe provides the most gains. __________________ Cobb Tuned \| Injen Intakes \| Fast Intentions Long Tube Headers \| Fast Intentions TDX Catback 18" Resonators CF Mufflers \| Tommy Kaira Hebi Bebi Shift Knob \| 19x9.5/19x10.5 Five Axis Design S5:F w/ 245/40/19 - 285/35/19 Hankook Ventus V12's

06-19-2010, 05:49 PM	#15 (permalink)
Vegitto-kun A True Z Fanatic Join Date: Feb 2010 Location: USA Posts: 2,011 Drives: 09 370Z Rep Power: 262	I think the last thing you would want is a 800 HP monster driving on a rally track

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