Go Back  Miata Turbo Forum - Boost cars, acquire cats. > Performance & Tuning > DIY Turbo Discussion
Reload this Page >

Quick, whats the diameter of the throttle body?

DIY Turbo Discussion greddy on a 1.8? homebrew kit?
Sponsored by:
Sponsored by:

Quick, whats the diameter of the throttle body?

 
Old 04-29-2008, 10:24 AM
  #1  
Elite Member
Thread Starter
iTrader: (9)
 
Saml01's Avatar
 
Join Date: Jul 2007
Location: NYC
Posts: 5,710
Total Cats: 2
Default Quick, whats the diameter of the throttle body?

I want to order my IC stuff and I forgot what diameter elbow I need for the throttle body.
Saml01 is offline  
Old 04-29-2008, 10:32 AM
  #2  
Elite Member
iTrader: (39)
 
Zabac's Avatar
 
Join Date: Sep 2007
Location: High Point NC
Posts: 4,850
Total Cats: 8
Default

2.5"
Zabac is offline  
Old 04-29-2008, 10:39 AM
  #3  
Elite Member
Thread Starter
iTrader: (9)
 
Saml01's Avatar
 
Join Date: Jul 2007
Location: NYC
Posts: 5,710
Total Cats: 2
Default

Are you sure?

I coulda sworn it was larger, I was planning on using a 2.5 inch pipe I just dont remember if I needed a 2.5 inch to 2.75 or 2.5 to 3.

I know the MAF housing is larger then 2.5.
Saml01 is offline  
Old 04-29-2008, 10:44 AM
  #4  
Elite Member
iTrader: (39)
 
Zabac's Avatar
 
Join Date: Sep 2007
Location: High Point NC
Posts: 4,850
Total Cats: 8
Default

I am pretty sure...I have a 2.5" ID coupler there now
Zabac is offline  
Old 04-29-2008, 10:54 AM
  #5  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 76,621
Total Cats: 2,317
Default

its a little smaller than 2.5" IIRC, but a 2.5" couple works best.
Braineack is offline  
Old 04-29-2008, 11:03 AM
  #6  
Elite Member
iTrader: (39)
 
Zabac's Avatar
 
Join Date: Sep 2007
Location: High Point NC
Posts: 4,850
Total Cats: 8
Default

wasn't it like 53mm or something like that...OD is very close to 2.5"
Zabac is offline  
Old 04-29-2008, 11:08 AM
  #7  
Junior Member
iTrader: (6)
 
Join Date: Oct 2007
Location: So Cal
Posts: 322
Total Cats: 0
Default

Originally Posted by Zabac View Post
wasn't it like 53mm or something like that...OD is very close to 2.5"
I have a 2.5 90 degree coupler and it fits just perfect, this is for an NB though so I am not sure if the OD is different.
99NBMia is offline  
Old 04-29-2008, 11:10 AM
  #8  
Elite Member
Thread Starter
iTrader: (9)
 
Saml01's Avatar
 
Join Date: Jul 2007
Location: NYC
Posts: 5,710
Total Cats: 2
Default

Sold. Thanks guys.

Just ordered tube and bends from racing solutions for my IC piping. I wish they had thinner stuff, and I wish even more I could buy it locally, but everywhere I go is rape price wise.
Saml01 is offline  
Old 04-29-2008, 11:16 AM
  #9  
Elite Member
iTrader: (39)
 
Zabac's Avatar
 
Join Date: Sep 2007
Location: High Point NC
Posts: 4,850
Total Cats: 8
Default

Move south of the Mason-Dixon line
Zabac is offline  
Old 04-29-2008, 11:41 AM
  #10  
Elite Member
Thread Starter
iTrader: (9)
 
Saml01's Avatar
 
Join Date: Jul 2007
Location: NYC
Posts: 5,710
Total Cats: 2
Default

Originally Posted by Zabac View Post
Move south of the Mason-Dixon line
If only everything was so simple.
Saml01 is offline  
Old 04-29-2008, 04:48 PM
  #11  
Elite Member
iTrader: (22)
 
Join Date: Dec 2006
Location: Sunny Spanish speaking Non US Caribbean
Posts: 3,232
Total Cats: 3
Default

Sorry to threadjack Sam but I'm also facing some issues with the coupler installed on my car (it gets loose pretty easily and I face a leak). I was told at the shop that I needed to get an intake pipe reducer from 2.5" to 2.25".

Is everyone positively sure that the NA throttle body is 2.5"?

Thanks and, once again, sorry to threadjack Sam!
Rafa is offline  
Old 04-29-2008, 04:54 PM
  #12  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 76,621
Total Cats: 2,317
Default

omg, your shop sucks dude.
Braineack is offline  
Old 04-29-2008, 04:57 PM
  #13  
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Chicago. (The non-murder part.)
Posts: 29,345
Total Cats: 2,936
Default

Originally Posted by Rafa View Post
Is everyone positively sure that the NA throttle body is 2.5"?
On the 1.6, it is not exactly 2.5", however a 2.5" silicone coupler is a nearly perfect fit.

Can't say about the 1.8 cars...
Joe Perez is offline  
Old 04-29-2008, 04:58 PM
  #14  
Elite Member
iTrader: (22)
 
Join Date: Dec 2006
Location: Sunny Spanish speaking Non US Caribbean
Posts: 3,232
Total Cats: 3
Default

Originally Posted by Braineack View Post
omg, your shop sucks dude.

No **** and the worst thing is that I've got no option

Braineack could it be that my IC piping is 2.75"? I bought a used S5 Begi so if anyone has one I'd appreciate some confirmation.
Rafa is offline  
Old 04-29-2008, 05:03 PM
  #15  
Elite Member
Thread Starter
iTrader: (9)
 
Saml01's Avatar
 
Join Date: Jul 2007
Location: NYC
Posts: 5,710
Total Cats: 2
Default

Ill go measure mine today and post a pic.
Saml01 is offline  
Old 04-29-2008, 05:37 PM
  #16  
Elite Member
iTrader: (22)
 
Join Date: Dec 2006
Location: Sunny Spanish speaking Non US Caribbean
Posts: 3,232
Total Cats: 3
Default

Originally Posted by Saml01 View Post
Ill go measure mine today and post a pic.
I'm scared of both the measurement and the pic!

I don't think you have an S5 installed.

Thanks anyways Sam.
Rafa is offline  
Old 04-29-2008, 05:56 PM
  #17  
Elite Member
iTrader: (3)
 
Join Date: May 2006
Location: Houston, TX
Posts: 2,895
Total Cats: 0
Default

1.8L is also 2.5" OD IIRC. I have 2.25" pipes on the cold side and had to use a 2.25-2.5" transition for the TB.
Arkmage is offline  
Old 04-29-2008, 06:16 PM
  #18  
Elite Member
iTrader: (39)
 
Zabac's Avatar
 
Join Date: Sep 2007
Location: High Point NC
Posts: 4,850
Total Cats: 8
Default

I have the 1.8 NA, and I have a 2.5" coupler there...only thing that sucks is that the other end of the intake piping is not connected to a turbo or intercooler
N/A blows
Zabac is offline  
Old 04-29-2008, 07:43 PM
  #19  
Elite Member
iTrader: (22)
 
Join Date: Dec 2006
Location: Sunny Spanish speaking Non US Caribbean
Posts: 3,232
Total Cats: 3
Default

Originally Posted by Arkmage View Post
1.8L is also 2.5" OD IIRC. I have 2.25" pipes on the cold side and had to use a 2.25-2.5" transition for the TB.
Thanks Arkmage and Dan. I assume I'll have to get a reduction coupling in my case.
Rafa is offline  
Old 04-29-2008, 08:41 PM
  #20  
Elite Member
iTrader: (24)
 
kotomile's Avatar
 
Join Date: Oct 2006
Location: Monterey, CA
Posts: 7,538
Total Cats: 40
Default

Originally Posted by Zabac View Post
N/A blows
In every sense but literal.
kotomile is offline  

Thread Tools
Search this Thread
Quick Reply: Quick, whats the diameter of the throttle body?


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.