downpipe bends - Miata Turbo Forum - Boost cars, acquire cats.

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

downpipe bends

Old 10-07-2008, 04:15 AM
  #1  
Elite Member
Thread Starter
iTrader: (24)
 
UrbanSoot's Avatar
 
Join Date: Jun 2007
Location: Sherman Oaks, CA
Posts: 4,653
Total Cats: 18
Default downpipe bends

so... im looking for a template of some sort or perhaps a list of bends used to make a downpipe for a miata... anyone has anything? i bet it will make a great sticky thread if someone actually has something
UrbanSoot is offline  
Old 10-07-2008, 05:01 AM
  #2  
Elite Member
iTrader: (5)
 
akaryrye's Avatar
 
Join Date: Jul 2006
Location: Central California
Posts: 2,510
Total Cats: 0
Default

well the begi-s looks like a 90* coming out of turbine followed by a 45*. Then to clear the transmission flange while not hitting the firewall, it looks like theres an s-bend made of two 45*s and then straight back including the flex bellow to the cat.

Only thing i think i want around for the build is a miter saw with a cuttoff wheel so i can get straight cuts when i finetune the fittment. Something to expand the pipes a bit would be super sweet too. Then tack it up and have a shop weld it up.
akaryrye is offline  
Old 10-07-2008, 05:15 AM
  #3  
Elite Member
Thread Starter
iTrader: (24)
 
UrbanSoot's Avatar
 
Join Date: Jun 2007
Location: Sherman Oaks, CA
Posts: 4,653
Total Cats: 18
Default

i cant weld for **** so ill just duct tape it and will have shop weld it for me

so... what bends should i get? 1x 90* and 3x 45* + 10' of straight? i think im gonna grab a U pipe as well while im at it in case i need some weird angle or something... this will be fun and will involve a LOT of duct tape...
UrbanSoot is offline  
Old 10-07-2008, 06:02 AM
  #4  
Junior Member
 
Join Date: May 2007
Location: San Diego
Posts: 380
Total Cats: 0
Default

I was planning on doing something like this. I have the top part of an old FM pipe that gives me a short 90degree bend from the turbo, to clear the firewall. Ill be using these connectors http://store.summitracing.com/partde...5&autoview=sku To adjust the size from 2.25 > 2.5 > 3". Right now im still not sure if im gonna go with either a cutout or a complete exhaust. http://store.summitracing.com/partde...5&autoview=sku Was thinking this thing which will do the 2.5">3.0">2.5 to stock cat. Also thinking of an electrical cutout for a fraction of the cost of a true 3".
jobambo is offline  
Old 10-07-2008, 12:20 PM
  #5  
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,127
Total Cats: 479
Default

y8s is offline  
Old 10-07-2008, 01:03 PM
  #6  
Junior Member
iTrader: (7)
 
Join Date: Aug 2006
Location: Binghamton, NY
Posts: 448
Total Cats: 1
Default

What sizes are you dealing with? Will it get progressivley larger? It its all the same size you could probably just use one 180 bend and a section of straight.

Masking tape works well. It cuts clean with a razor for tacking and it doesn't leave the nasty residue behind.
--Alex
AlexO35 is offline  
Old 10-07-2008, 02:59 PM
  #7  
I'm Miserable!
iTrader: (5)
 
Join Date: Sep 2005
Location: SLC, Utah
Posts: 1,589
Total Cats: 0
Default

I bought a tight radius 90 bend, regular 80 bend, and 6 feet of straight for mine. The 90 coming off the turbine, the 80 off that going back to the straight.
zoom2zoom is offline  
Old 10-07-2008, 03:41 PM
  #8  
Elite Member
iTrader: (2)
 
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,558
Total Cats: 11
Default

pics?
240_to_miata is offline  
Old 10-10-2008, 03:23 AM
  #9  
Elite Member
iTrader: (5)
 
akaryrye's Avatar
 
Join Date: Jul 2006
Location: Central California
Posts: 2,510
Total Cats: 0
Default

when i make mine ill document it for you guys. Or ill get lazy and pay the $300 for the begi-s downpipe with modification for a standard 5 bolt t3 flange.
akaryrye is offline  
Old 10-10-2008, 03:48 AM
  #10  
Elite Member
Thread Starter
iTrader: (24)
 
UrbanSoot's Avatar
 
Join Date: Jun 2007
Location: Sherman Oaks, CA
Posts: 4,653
Total Cats: 18
Default

eh... wont need this anymore... a client of mine will be building my miata engine and finishing my turbo

going 3" all the way with catalytic and resonator
UrbanSoot is offline  
Old 10-10-2008, 03:55 AM
  #11  
Elite Member
iTrader: (6)
 
Join Date: Sep 2007
Location: CA
Posts: 1,979
Total Cats: 9
Default

Originally Posted by akaryrye View Post
when i make mine ill document it for you guys. Or ill get lazy and pay the $300 for the begi-s downpipe with modification for a standard 5 bolt t3 flange.
Looking forward to seeing this. I have future plans for this as well.
kenzo42 is offline  
Old 10-10-2008, 04:58 AM
  #12  
I'm Miserable!
iTrader: (5)
 
Join Date: Sep 2005
Location: SLC, Utah
Posts: 1,589
Total Cats: 0
Default

Originally Posted by UrbanSoot View Post
eh... wont need this anymore... a client of mine will be building my miata engine and finishing my turbo

going 3" all the way with catalytic and resonator
How much work have you actually done yourself on your car(s)??
zoom2zoom is offline  
Old 10-10-2008, 05:43 AM
  #13  
Elite Member
iTrader: (11)
 
Join Date: Jun 2007
Location: Overland Park, Kansas
Posts: 5,362
Total Cats: 43
Default

I'm betting on 1 90 degree, along with 2 45 degree bends..


but just in case, I bought an assortment of 10 misc bends in 3" mandrel aluminized. Once I get a good one fabbed up I might make it out of stainless, if I can get access to a TIG welder and figure out how to use one again... Don't think its quite like riding a bicycle...
elesjuan is offline  
Old 10-10-2008, 06:36 AM
  #14  
Elite Member
Thread Starter
iTrader: (24)
 
UrbanSoot's Avatar
 
Join Date: Jun 2007
Location: Sherman Oaks, CA
Posts: 4,653
Total Cats: 18
Default

Originally Posted by zoom2zoom View Post
How much work have you actually done yourself on your car(s)??
almost all of it besides lifting/installing heavy stuff (im very skinny) but id rather have someone else do it because i dont have time...
UrbanSoot is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
StratoBlue1109
Miata parts for sale/trade
20
09-30-2018 02:09 PM
Full_Tilt_Boogie
Build Threads
63
08-09-2018 07:54 PM
Corky Bell
Prefabbed Turbo Kits
18
11-22-2016 10:01 PM
Goldwar
DIY Turbo Discussion
2
09-29-2015 10:20 AM


Quick Reply: downpipe bends


Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 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.