Custom 2.5" straight pipe

black-370z · 01-07-2013, 01:26 AM

I have been wanting to do some performance mods to my car and I found local shop this past week that would build me a mandrel bent 2.5" catback dual exhaust for $400. I had them go ahead and reuse the stock tips for now until i can buy a nicer pair. First, all i can say is wow! It screams without the muffler and resonators. Everywhere i go people stop and watch as i drive by. Im really happy with the work that they did and how it sounds. Definite

Japanjay · 01-07-2013, 01:36 AM

My buddy who works on ratrods and muscle cars and has offered to build one for me just like that. Same x-pipe design too. I have seen a 350z he did and that thing screams. Anyway you can do a power pull or 2 on a dyno to see if there is any gains?

chrischhorn · 01-07-2013, 01:38 AM

Quote:

Originally Posted by black-370z

I have been wanting to do some performance mods to my car and I found local shop this past week that would build me a mandrel bent 2.5" catback dual exhaust for $400. I had them go ahead and reuse the stock tips for now until i can buy a nicer pair. First, all i can say is wow! It screams without the muffler and resonators. Everywhere i go people stop and watch as i drive by. Im really happy with the work that they did and how it sounds. Definite

Wondering on weight and how much you saved. May have to go this route to start setting up for full track. Looks great though. Tucked up real nice!

HArturo319 · 01-07-2013, 01:39 AM

sound clip please =)

HArturo319 · 01-07-2013, 01:41 AM

and this is totally ignorant, but why not just straight pipe?

ts-c63 · 01-07-2013, 01:48 AM

i like the fact that you did a X pipe. If it was full straight it would most likely sound really raspy and high pitched.

chrischhorn · 01-07-2013, 02:13 AM

Quote:

Originally Posted by HArturo319

and this is totally ignorant, but why not just straight pipe?

Pure straight pipe with no bends at all relieves back pressure but not enough back pressure hurts performance. Unless FI, straight pipe would actually more then likely hurt more then it helps.

DEpointfive0 · 01-07-2013, 02:15 AM

Quote:

Originally Posted by chrischhorn

Pure straight pipe with no bends at all relieves back pressure but not enough back pressure hurts performance. Unless FI, straight pipe would actually more then likely hurt more then it helps.

And an X-pipe allows for a scavenging effect, increasing HP

black-370z · 01-07-2013, 02:29 AM

Quote:

Originally Posted by Japanjay

My buddy who works on ratrods and muscle cars and has offered to build one for me just like that. Same x-pipe design too. I have seen a 350z he did and that thing screams. Anyway you can do a power pull or 2 on a dyno to see if there is any gains?

ill call around this week and scope one out. Hopefully i will be able to find one near by for a good price.

Quote:

Originally Posted by chrischhorn

Wondering on weight and how much you saved. May have to go this route to start setting up for full track. Looks great though. Tucked up real nice!

Idk exact numbers but i do know that the stock muffler and y-pipe are not that light. At first i wanted to go with a 3" SP but i read on here that the 3" was more for track cars but the 2.5" netted more gains if your n/a or tt so i went with that instead. And yes, the fabricator did an amazing job!

Quote:

Originally Posted by HArturo319

sound clip please =)

I will as soon as i find out how to put one on here, and as well as adding hp it also sounds better. Around 2k-3k rpms the drone in the cab is a little loud but as soon as you lay into the throttle it sounds like an f1 car!

Sh0velMan · 01-07-2013, 08:30 AM

Quote:

Originally Posted by black-370z

Idk exact numbers but i do know that the stock muffler and y-pipe are not that light. At first i wanted to go with a 3" SP but i read on here that the 3" was more for track cars but the 2.5" netted more gains if your n/a or tt so i went with that instead. And yes, the fabricator did an amazing job!

I'm sorry, I can't help myself...

So, because you heard a 3" single pipe is for 'track cars' but the 2.5" (duals) netted more gains, you went with that?

A 2.5" dual exhaust is a total of 9.8 square inches of exhaust area.

A 3" single is 7.07 square inches.

The 3" single can flow to 350-375hp N/A depending on Y pipe and header design.

The 2.5" dual has 38% more area (flow potential) than the single 3". Meaning a single 3" is much more practical for your power level than dual 2.5's would ever be.

It's all meaningless with the stock headers and cats, so this is really just academic anyway.

Sales@AAMComp · 01-07-2013, 10:00 AM

Great price for a full CBE, what material was used? Stainless steel or mild steel? And what gauge?

black-370z · 01-07-2013, 11:48 AM

Quote:

Originally Posted by Sh0velMan

I'm sorry, I can't help myself...

So, because you heard a 3" single pipe is for 'track cars' but the 2.5" (duals) netted more gains, you went with that?

A 2.5" dual exhaust is a total of 9.8 square inches of exhaust area.

A 3" single is 7.07 square inches.

The 3" single can flow to 350-375hp N/A depending on Y pipe and header design.

The 2.5" dual has 38% more area (flow potential) than the single 3". Meaning a single 3" is much more practical for your power level than dual 2.5's would ever be.

It's all meaningless with the stock headers and cats, so this is really just academic anyway.

No its fine, and I was talking about 3" piping in general, not specifically a single exhaust. I wanted to go with the best option so later if i do go with a tt or a sc, i wouldnt have to get a full new exhaust and at the same time i didnt want to have an empty cutout on my bumper where an exhaust tip was.

Everyone can appreciate academic information, especially a college student

The next upgrade ill be working on will be the intakes and then ill be moving to testpipes and headers.

Quote:

Originally Posted by Khoi@AAMComp

Great price for a full CBE, what material was used? Stainless steel or mild steel? And what gauge?

Yeah its nice to have a master fabricator in town thats inexpensive and when the time comes for some mufflers/testpipes/headers he can install them as well

and Im pretty sure its carbon steel and idk what gauge they use.

Japanjay · 01-18-2013, 12:55 AM

So whats the skinny on some dyno time? The new s-line mid pipe section from AAM just dropped and it runs a "H" pipe vs your "X". I am needing some dyno charts from you to determine which route I am going to go.

AlexRaymond19 · 01-18-2013, 06:29 AM

Looks good! In for some sound clips and numbers. If you are not sure how to post vids on here just upload it to youtube and and post the link, or you could always make a photobucket account and do it that way too. I think they have an app for andriod and iphone so you can upload pics and vids directly from your phone

01-07-2013, 01:39 AM	#4 (permalink)
HArturo319 Enthusiast Member Join Date: Jun 2012 Location: Houston, TX Posts: 323 Drives: 2013 PW NISMO Rep Power: 13	sound clip please =) __________________ Me And Zoloft Get Along Just Fine

01-07-2013, 01:41 AM	#5 (permalink)
HArturo319 Enthusiast Member Join Date: Jun 2012 Location: Houston, TX Posts: 323 Drives: 2013 PW NISMO Rep Power: 13	and this is totally ignorant, but why not just straight pipe? __________________ Me And Zoloft Get Along Just Fine

01-07-2013, 10:00 AM	#11 (permalink)
Sales@AAMComp A True Z Fanatic Join Date: Jul 2012 Location: Annapolis Junction, MD Posts: 4,079 Drives: GT-R Rep Power: 21	Great price for a full CBE, what material was used? Stainless steel or mild steel? And what gauge? __________________ Tyler Day, Technical Sales TylerD@aamcompetition.com 301-497-9214 Direct AAM Competition \| YouTube channel \| LIKE us on Facebook!

01-18-2013, 06:29 AM	#14 (permalink)
AlexRaymond19 Track Member Join Date: Jun 2011 Location: Maine Posts: 771 Drives: 2010 Nissan 370z Rep Power: 15	Looks good! In for some sound clips and numbers. If you are not sure how to post vids on here just upload it to youtube and and post the link, or you could always make a photobucket account and do it that way too. I think they have an app for andriod and iphone so you can upload pics and vids directly from your phone __________________ 2010 370Z Touring MT \| Stillen \| Motordyne \| Momentum\| Z1 \| Fast Intentions \| Advant Garde \| RE11 \| Swift \| SPC \| Quaife \| Whiteline \| Evo R \| 322RWHP 259ft-lb Mustang

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
straight pipe question	HappyZmoke	Intake/Exhaust	0	07-12-2012 03:10 PM
*MXP 370z Test Pipe SUPER SALE* \| Resonated and Straight Pipe	SE	Exhaust/Intake	10	04-17-2012 06:33 PM
[FOR SALE] custom 3"-2.5" bolt on mid pipe	czheng51	Parts for sale (Private Classifieds)	2	03-02-2012 04:54 PM
straight pipe exhaust	czheng51	Intake/Exhaust	2	05-27-2011 05:30 PM
Straight Pipe?	CWofRR	Intake/Exhaust	18	06-24-2010 11:34 PM

01-07-2013, 01:36 AM	#2 (permalink)
Japanjay Track Member Join Date: Mar 2012 Location: Puyallup Posts: 856 Drives: 09 Nissan 370z MB M6 Rep Power: 14	My buddy who works on ratrods and muscle cars and has offered to build one for me just like that. Same x-pipe design too. I have seen a 350z he did and that thing screams. Anyway you can do a power pull or 2 on a dyno to see if there is any gains?

01-07-2013, 01:48 AM	#6 (permalink)
ts-c63 Enthusiast Member Join Date: Feb 2011 Location: nyc/nj Posts: 384 Drives: 2012 370z 7At Rep Power: 14	i like the fact that you did a X pipe. If it was full straight it would most likely sound really raspy and high pitched.

01-18-2013, 12:55 AM	#13 (permalink)
Japanjay Track Member Join Date: Mar 2012 Location: Puyallup Posts: 856 Drives: 09 Nissan 370z MB M6 Rep Power: 14	So whats the skinny on some dyno time? The new s-line mid pipe section from AAM just dropped and it runs a "H" pipe vs your "X". I am needing some dyno charts from you to determine which route I am going to go.