2.25" coupler, can it be "forced" to fit a 2" and a 2.5"? - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


DIY Turbo Discussion greddy on a 1.8? homebrew kit?

Reply
 
 
 
LinkBack Thread Tools
Old 12-06-2008, 04:28 AM   #1
Junior Member
Thread Starter
 
Join Date: May 2007
Location: San Diego
Posts: 383
Total Cats: 0
Default 2.25" coupler, can it be "forced" to fit a 2" and a 2.5"?

Just wondering if a 2.25 silicon coupler can forced to fit on a 2" pipe and a 2.5"? Yes, i understand its not the "proper" way of doing things, but does anyone have any experience with this?
jobambo is offline   Reply With Quote
Old 12-06-2008, 05:40 AM   #2
I'm Miserable!
iTrader: (5)
 
Join Date: Sep 2005
Location: SLC, Utah
Posts: 1,591
Total Cats: 0
Default

I wouldn't do it personally, too much of a chance of it breaking or leaking.
zoom2zoom is offline   Reply With Quote
Old 12-06-2008, 05:40 AM   #3
Elite Member
iTrader: (11)
 
Join Date: Jun 2007
Location: Overland Park, Kansas
Posts: 5,382
Total Cats: 43
Default

Duct tape.


Oh, JB Weld too.

Man thats 1/4" difference all around, just get the proper coupler.
elesjuan is offline   Reply With Quote
Old 12-06-2008, 05:43 AM   #4
I'm Miserable!
iTrader: (5)
 
Join Date: Sep 2005
Location: SLC, Utah
Posts: 1,591
Total Cats: 0
Default

$20 is much cheaper than a tow truck, that's how I see it anyway.
zoom2zoom is offline   Reply With Quote
Old 12-06-2008, 05:56 AM   #5
Elite Member
iTrader: (5)
 
akaryrye's Avatar
 
Join Date: Jul 2006
Location: Central California
Posts: 2,526
Total Cats: 0
Default

you are better off rigging something up with rubber ABS couplers and an ABS reducer than what you are talking about
akaryrye is offline   Reply With Quote
Old 12-06-2008, 12:52 PM   #6
Elite Member
iTrader: (9)
 
Join Date: Aug 2006
Location: Concord, North Carolina
Posts: 4,173
Total Cats: 5
Default

Needs more 2-2.5" reducer?
miatamania is offline   Reply With Quote
Old 12-06-2008, 01:12 PM   #7
Elite Member
iTrader: (8)
 
Join Date: Oct 2007
Location: Dallas
Posts: 1,841
Total Cats: 0
Default

Quote:
Originally Posted by jobambo View Post
Just wondering if a 2.25 silicon coupler can forced to fit on a 2" pipe and a 2.5"? Yes, i understand its not the "proper" way of doing things, but does anyone have any experience with this?
Carry that pipe to the muffler shop. They can inlarge or shrink the pipe that much. Probaly free to $5.00 for their time. Then you have a matching size.
Toddcod is offline   Reply With Quote
Old 12-06-2008, 01:35 PM   #8
Elite Member
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 8,797
Total Cats: 248
Default

Check out siliconeintakes.com They sell all the different couplers for cheap. You'll be pissed if you blow a coupler or tear one. Plus it could cause you to over-spin and damage your turbo. And who likes half-assing ****? I mean, if you're in a bind, sure. But don't rig it to save 20 bucks.
patsmx5 is offline   Reply With Quote
Old 12-06-2008, 02:19 PM   #9
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,364
Total Cats: 1,325
Default

No.
Savington is online now   Reply With Quote
Old 12-06-2008, 02:34 PM   #10
Elite Member
iTrader: (12)
 
Join Date: Jan 2007
Location: Hermosa Beach, CA
Posts: 2,575
Total Cats: 11
Default

I got a 2 inch coupler to fit a 2.25 inch pipe, just make a small slit in the coupler at the end to help slideing it onto the pipe, use some hairspray, and force that sucker on there. Its been holding with a v band clamp for 8 months now...
cardriverx is offline   Reply With Quote
Old 12-06-2008, 02:53 PM   #11
Cpt. Slow
iTrader: (25)
 
curly's Avatar
 
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 12,107
Total Cats: 518
Default

you can put a piece of 2" hose around a pipe and then slip a 2.5" coupler over that, then clamp it down. but I doubt you'll get a silicone coupler to stretch out to be bigger.
curly is offline   Reply With Quote
Old 12-06-2008, 04:37 PM   #12
Elite Member
iTrader: (13)
 
Join Date: Dec 2006
Location: Taos, New mexico
Posts: 5,702
Total Cats: 237
Default

Microwave it in a bowl of warm water. It works, but its ghetto.
Fireindc is offline   Reply With Quote
Old 12-07-2008, 12:22 AM   #13
Elite Member
iTrader: (12)
 
Join Date: Jan 2007
Location: Hermosa Beach, CA
Posts: 2,575
Total Cats: 11
Default

Quote:
Originally Posted by Fireindc View Post
Microwave it in a bowl of warm water. It works, but its ghetto.
word, get the silicone warm and you can get it to fit a .25 inch larger pipe than intended.
cardriverx is offline   Reply With Quote
Old 12-07-2008, 03:04 AM   #14
Junior Member
Thread Starter
 
Join Date: May 2007
Location: San Diego
Posts: 383
Total Cats: 0
Default

Quote:
Originally Posted by cardriverx View Post
word, get the silicone warm and you can get it to fit a .25 inch larger pipe than intended.
Still thinking about it.
jobambo is offline   Reply With Quote
Old 12-07-2008, 03:11 AM   #15
Junior Member
Thread Starter
 
Join Date: May 2007
Location: San Diego
Posts: 383
Total Cats: 0
Default

Another question, Whats wrong with using a regular rubber hose to connect 2 metal pipes together? Technically, there is no room for it collapse. Im reading that these silicon hoses are good for 100+ psi, why would i even need that much?
jobambo is offline   Reply With Quote
Old 12-07-2008, 04:44 AM   #16
Junior Member
iTrader: (5)
 
Join Date: Jan 2006
Posts: 345
Total Cats: 0
Default

OEM turbos use rubber hose. You don't tend to see silicon from the factory. It works.
Advance has some exhaust pipe reducers in various sizes for a couple bucks each. It's a cheaper way to reduce pipe size than a silicon reducer.
tronik is offline   Reply With Quote
Old 12-07-2008, 01:25 PM   #17
Elite Member
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 8,797
Total Cats: 248
Default

Quote:
Originally Posted by jobambo View Post
Another question, Whats wrong with using a regular rubber hose to connect 2 metal pipes together? Technically, there is no room for it collapse. Im reading that these silicon hoses are good for 100+ psi, why would i even need that much?
Rubber gets weak at high temps. So when you're boosting, the hotside charge pipes get really hot. And plain rubber will fail at these temps. Hence why silicone is used. It can take the heat.

For crying out loud, just buy a 20 dollar whatever you need and be done.
patsmx5 is offline   Reply With Quote
Old 12-07-2008, 01:48 PM   #18
Junior Member
iTrader: (1)
 
Join Date: Apr 2008
Location: Springfield Oregon
Posts: 174
Total Cats: 0
Default

I'd recommend looking through the car parts store's radiator hoses to find what you need. It's intended for moderately high temp, moderate pressure, and is cord reinforced. I've been using a 2" 90 bend from this method since May with a few thousand miles on the clock and it is in perfect shape. If you look closely at my sig pic, you'll see it coming off the compressor outlet.
miatamoxie is offline   Reply With Quote
Old 12-07-2008, 04:43 PM   #19
Junior Member
Thread Starter
 
Join Date: May 2007
Location: San Diego
Posts: 383
Total Cats: 0
Default

Quote:
Originally Posted by patsmx5 View Post
Rubber gets weak at high temps. So when you're boosting, the hotside charge pipes get really hot. And plain rubber will fail at these temps. Hence why silicone is used. It can take the heat.

For crying out loud, just buy a 20 dollar whatever you need and be done.
Im a cheap SOB that wants to make a a 135 degree bend as cheap as possible.
jobambo is offline   Reply With Quote
Old 12-07-2008, 04:55 PM   #20
Elite Member
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 8,797
Total Cats: 248
Default

I'm gonna laugh at you when your $6.35 solution fails you and damages your slightly more expensive turbo.
patsmx5 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Raleigh: Fiberglass headlight scope, 1.6L ECU, AFM, Hardtop latches, more bigmackloud Miata parts for sale/trade 13 09-22-2017 01:34 PM
Garrett Turbo, 1.8 Oil Pan, & Misc. Stuff nbdooey Miata parts for sale/trade 9 08-30-2017 10:50 PM
Another Cast Manifold Corky Bell Prefabbed Turbo Kits 18 11-22-2016 10:01 PM
Need help - Stock Balancer and Fastforward overlay pulleys Frank_and_Beans Supercharger Discussion 13 09-12-2016 09:17 PM
Low oil pressure after 1.8 swap and new turbo setup JesseTheNoob DIY Turbo Discussion 15 09-30-2015 03:44 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 05:11 PM.