:::RHMT::: Real Home Made Turbo

Please login or register.

Login with username, password and session length
Advanced search  

News:

Daspoop/Trevor YOU WILL BE MISSED, RIP (link)  :'(

Pages: [1]   Go Down

Author Topic: 2.5 or 3 inch intercooler piping?  (Read 5595 times)

imburne

  • Certified OG
  • *****
  • Offline Offline
  • Posts: 3983
    • TurboByHOLSET
2.5 or 3 inch intercooler piping?
« on: October 15, 2011, 07:11:48 AM »

For a b18c1, hx35, 64mm throttle body, 2.5 inch exhaust.

Go with the bigger or smaller piping?

92CXyD

  • Twincharged Smeghead
  • Global Moderator
  • Certified OG
  • *****
  • Online Online
  • Posts: 6748
  • I look around and all I see is Smegheads
Re: 2.5 or 3 inch intercooler piping?
« Reply #1 on: October 15, 2011, 10:22:20 AM »

Keep all 3", more surface area for advertising, and potential bling when ya pop the hood.  ;D

Depends on your HP goals.

600+bhp then yeah 3"

ratcityrex

  • I Get Blown Daily
  • Global Moderator
  • Certified OG
  • *****
  • Offline Offline
  • Posts: 7369
Re: 2.5 or 3 inch intercooler piping?
« Reply #2 on: October 15, 2011, 02:22:11 PM »

2.5 will be fine, but I did 2.5 from turbo to ic, and 3 from ic to my baller pbt throttle body.
Logged
New setup is old bottom end with a hype r head with gsr cams. built lsv with hx35 @ 26psi on pump gas
LEED tuned! 434hp/329tq http://www.youtube.com/watch?v=_pbDXZxZdZs
http://www.realhomemadeturbo.com/forum/index.php/topic,16195.0.html

Old Setup B18a1 296hp/289tq LEED Tuned 20psi on pump! http://www.youtube.com/watch?v=2Yj-Z90j4W4   
http://www.realhomemadeturbo.com/forum/index.php/topic,205.msg2437.html#msg2437

bigdaddyvtec

  • Certified OG
  • *****
  • Offline Offline
  • Posts: 8948
  • Go outside and play hide and go fuckyourself
Re: 2.5 or 3 inch intercooler piping?
« Reply #3 on: October 19, 2011, 01:33:53 PM »

Under 700 no NEED for 3.
Logged
http://i256.photobucket.com/albums/hh166/joeymisanthropy/Misce/TURBOTHIS.jpg

H series 35 pounds... Will turn you out!
 ---GFI we build FAST---

imburne

  • Certified OG
  • *****
  • Offline Offline
  • Posts: 3983
    • TurboByHOLSET
Re: 2.5 or 3 inch intercooler piping?
« Reply #4 on: October 19, 2011, 01:40:45 PM »

Thanks for the info everyone. Got the 2.5 and collecting more parts.. About $500-$700 left on the build for completion.

PhilStubbs

  • Certified OG
  • *****
  • Offline Offline
  • Posts: 5878
  • Teh Secksy.....I has it
Re: 2.5 or 3 inch intercooler piping?
« Reply #5 on: October 19, 2011, 02:23:35 PM »

I talked to JD about the same thing a little while back. I went with 3" cause the cost was basically the same and spool time seems the same too. It looks badass(meh) but I now have pipes for as much power as I could ever imagine pushing through a Honda with no downsides.
Logged
obd1>gtgtall

 fucking box started smoking and i saw a flame start up so i grabbed a bucket of water and splashed it on the breaker box.

92CXyD

  • Twincharged Smeghead
  • Global Moderator
  • Certified OG
  • *****
  • Online Online
  • Posts: 6748
  • I look around and all I see is Smegheads
Re: 2.5 or 3 inch intercooler piping?
« Reply #6 on: October 19, 2011, 03:24:22 PM »

I talked to JD about the same thing a little while back. I went with 3" cause the cost was basically the same and spool time seems the same too. It looks badass(meh) but I now have pipes for as much power as I could ever imagine pushing through a Honda with no downsides.

I saw no difference in pressures when using 2 and 2.5" (older) IC and 3" (newest) IC piping on my SC14 on my D16z6/y8/vitara/eagle build.  :noel:

Tim

  • Certified OG
  • *****
  • Offline Offline
  • Posts: 2632
Re: 2.5 or 3 inch intercooler piping?
« Reply #7 on: October 19, 2011, 03:33:16 PM »

2.5 will be fine, but I did 2.5 from turbo to ic, and 3 from ic to my baller pbt throttle body.
newb questions, why do people put smaller diameter from turbo to ic, and larger from ic to throttle body?
I see this a lot.
Logged

malichite

  • Administrator
  • Certified OG
  • *****
  • Offline Offline
  • Posts: 1988
  • Harbor Freight Ninja!
Re: 2.5 or 3 inch intercooler piping?
« Reply #8 on: October 19, 2011, 03:41:25 PM »

Dont be a pussy, just run 4" already and get it done!  That or the biggest PVC you can find at lowes and use the savings to buy beer.
Logged
You hhave just failed on so many levels, im waiting for someone else to verbally slap you in the gooch with a mallet

92CXyD

  • Twincharged Smeghead
  • Global Moderator
  • Certified OG
  • *****
  • Online Online
  • Posts: 6748
  • I look around and all I see is Smegheads
Re: 2.5 or 3 inch intercooler piping?
« Reply #9 on: October 19, 2011, 05:13:15 PM »

2.5 will be fine, but I did 2.5 from turbo to ic, and 3 from ic to my baller pbt throttle body.
newb questions, why do people put smaller diameter from turbo to ic, and larger from ic to throttle body?
I see this a lot.

Probably because they are using a 70mm or larger tb.  :noel:

PhilStubbs

  • Certified OG
  • *****
  • Offline Offline
  • Posts: 5878
  • Teh Secksy.....I has it
Re: 2.5 or 3 inch intercooler piping?
« Reply #10 on: October 19, 2011, 05:53:17 PM »

2.5 will be fine, but I did 2.5 from turbo to ic, and 3 from ic to my baller pbt throttle body.
newb questions, why do people put smaller diameter from turbo to ic, and larger from ic to throttle body?
I see this a lot.

Probably because they are using a 70mm or larger tb.  :noel:

i never really understood that either. kinda seems opposite of what you would want. hot air coming out of the turbo would be less dense then after the intercooler it would be more dense and need less volume. i could be way off, but it my head it makes sense
Logged
obd1>gtgtall

 fucking box started smoking and i saw a flame start up so i grabbed a bucket of water and splashed it on the breaker box.

Tim

  • Certified OG
  • *****
  • Offline Offline
  • Posts: 2632
Re: 2.5 or 3 inch intercooler piping?
« Reply #11 on: October 19, 2011, 06:04:26 PM »

2.5 will be fine, but I did 2.5 from turbo to ic, and 3 from ic to my baller pbt throttle body.
newb questions, why do people put smaller diameter from turbo to ic, and larger from ic to throttle body?
I see this a lot.

Probably because they are using a 70mm or larger tb.  :noel:

i never really understood that either. kinda seems opposite of what you would want. hot air coming out of the turbo would be less dense then after the intercooler it would be more dense and need less volume. i could be way off, but it my head it makes sense
That is exactly how my thoughts were, but I never asked anyone that would actually know.
Logged

92CXyD

  • Twincharged Smeghead
  • Global Moderator
  • Certified OG
  • *****
  • Online Online
  • Posts: 6748
  • I look around and all I see is Smegheads
Re: 2.5 or 3 inch intercooler piping?
« Reply #12 on: October 19, 2011, 06:55:44 PM »

2.5 will be fine, but I did 2.5 from turbo to ic, and 3 from ic to my baller pbt throttle body.
newb questions, why do people put smaller diameter from turbo to ic, and larger from ic to throttle body?
I see this a lot.

Probably because they are using a 70mm or larger tb.  :noel:

i never really understood that either. kinda seems opposite of what you would want. hot air coming out of the turbo would be less dense then after the intercooler it would be more dense and need less volume. i could be way off, but it my head it makes sense
That is exactly how my thoughts were, but I never asked anyone that would actually know.

My original reason for using 3" pipe was to have less flow loss due to bends.

But it actually made it easier route my piping in respect to my setup.  :noel:
Pages: [1]   Go Up