DIY Downpipe to tailpipe *56k Warning* - 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 05-02-2009, 02:04 AM   #1
Elite Member
Thread Starter
iTrader: (7)
 
Join Date: Jan 2007
Location: Renton Washington
Posts: 1,742
Total Cats: 3
Default DIY Downpipe to tailpipe *56k Warning*

Well since i got my megasquirt started i figured i mine as well take steps to make it street legal.

Currently it sounds like this

(sorry for not embedding it, dont know how )

[fixed- JP]

My plan is going from a 2.5" stainless downpipe and swage to a 3" aluminized steel all the way back. I have magnaflow cat and summit racing turbo muffler. I plan on TIG welding all of the pipe; ill backpurge the stainless but probably not the aluminized 3"

1. Materials ( probably enough to do 2 cars but can never have too much, I do have another project sitting outside that needs exhaust =)

2. Got the catback off

3. All thats left is the downpipe.

Ill get that later
Attached Thumbnails
DIY Downpipe to tailpipe *56k Warning*-p5010040.jpg   DIY Downpipe to tailpipe *56k Warning*-p5010041.jpg   DIY Downpipe to tailpipe *56k Warning*-p5010042.jpg  

Last edited by SKMetalworks; 05-03-2009 at 03:11 AM. Reason: Fixed youtube video
SKMetalworks is offline   Reply With Quote
Old 05-02-2009, 06:03 AM   #2
Junior Member
 
Join Date: May 2007
Location: San Diego
Posts: 383
Total Cats: 0
Default

I was thinking of doing the same thing but using exhaust clamps instead of welding.
Also on my mind is a electric cutout hooked up a relay and to the electric boost controller so it automatically opens when i hit full boost.
jobambo is offline   Reply With Quote
Old 05-02-2009, 12:15 PM   #3
Senior Member
iTrader: (1)
 
Join Date: Mar 2006
Location: Tucson "it's 110" Arizona
Posts: 1,017
Total Cats: 0
Default

I'm interested. Looks like you have enough piping configurations there, are you going to use the cool 2.5 > 3.0 smooth transition?
Attached Thumbnails
DIY Downpipe to tailpipe *56k Warning*-389-r3025.jpg  
UofACATS is offline   Reply With Quote
Old 05-02-2009, 12:52 PM   #4
Junior Member
iTrader: (3)
 
Join Date: Apr 2009
Location: McDonough Ga.
Posts: 356
Total Cats: -26
Default

I dont think you need to purge the mild steel part even if you use the same fill thru the whole system,I would use a purge dam on either side of the weld area on the SS side though.IMO.Good luck cant wait to see a "stack of dimes"
Reverend Greg is offline   Reply With Quote
Old 05-03-2009, 12:46 AM   #5
Elite Member
Thread Starter
iTrader: (7)
 
Join Date: Jan 2007
Location: Renton Washington
Posts: 1,742
Total Cats: 3
Default

Well today i believe i got the hardest part done ( minus the SG part )

1. Marking the first cut

2. Gotta dig through some **** to get my chop saw

3. not perfect but itl do

4. Homemade clamping process

5. thats better!

6. first piece tacked in

7. second piece tacked in

8. Me tacking the 3rd piece on (CAUTION: i am hot, i know )

9. how it looks in there, its a little tight but i got it in O crap i still have one more piece to tack in there

10. view from the transmission tunnel

11. there she is

12. another angle

13. inside at cool end

14. gonna hafta cut part of the sheet metal to make it fit

15. Dremel FTW

16. going to have to go back and do some more grinding on that area but atleast it bolts up.

worked for about 4 hours today
Attached Thumbnails
DIY Downpipe to tailpipe *56k Warning*-p5020001.jpg   DIY Downpipe to tailpipe *56k Warning*-p5020002.jpg   DIY Downpipe to tailpipe *56k Warning*-p5020003.jpg   DIY Downpipe to tailpipe *56k Warning*-p5020004.jpg   DIY Downpipe to tailpipe *56k Warning*-p5020005.jpg  

DIY Downpipe to tailpipe *56k Warning*-p5020007.jpg   DIY Downpipe to tailpipe *56k Warning*-p5020009.jpg   DIY Downpipe to tailpipe *56k Warning*-p5020012.jpg   DIY Downpipe to tailpipe *56k Warning*-p5020014.jpg   DIY Downpipe to tailpipe *56k Warning*-p5020015.jpg  

DIY Downpipe to tailpipe *56k Warning*-p5020016.jpg   DIY Downpipe to tailpipe *56k Warning*-p5020017.jpg   DIY Downpipe to tailpipe *56k Warning*-p5020018.jpg   DIY Downpipe to tailpipe *56k Warning*-p5020020.jpg   DIY Downpipe to tailpipe *56k Warning*-p5020021.jpg  

SKMetalworks is offline   Reply With Quote
Old 05-03-2009, 10:05 AM   #6
Elite Member
iTrader: (11)
 
Join Date: Jun 2007
Location: Meriden, CT
Posts: 2,072
Total Cats: 1
Default

Nice work...what I would'nt do to have a proper shop right now. I really need to get a welder and some work space god damnit!
Cspence is offline   Reply With Quote
Old 05-03-2009, 02:49 PM   #7
Elite Member
Thread Starter
iTrader: (7)
 
Join Date: Jan 2007
Location: Renton Washington
Posts: 1,742
Total Cats: 3
Default

My garage is a freakin mess. To many car parts. I got a engine 2 heads a tranny with screwd up 3rd gear, lots of pipe, and then on top of it my mom is a packrat
SKMetalworks is offline   Reply With Quote
Old 05-04-2009, 12:25 AM   #8
Senior Member
iTrader: (2)
 
Join Date: Aug 2007
Location: North Cackalackey
Posts: 716
Total Cats: 2
Default

damn that is going to be tight. lots of heat up top wrap the pipe well, and the brake lines
musanovic is offline   Reply With Quote
Old 05-04-2009, 12:29 AM   #9
Elite Member
iTrader: (11)
 
Join Date: Jun 2007
Location: Overland Park, Kansas
Posts: 5,382
Total Cats: 43
Default

Hey, That's looking VERY nice! Can't wait to get started on my downpipe!!!
elesjuan is offline   Reply With Quote
Old 05-04-2009, 01:26 AM   #10
Elite Member
Thread Starter
iTrader: (7)
 
Join Date: Jan 2007
Location: Renton Washington
Posts: 1,742
Total Cats: 3
Default

well today was not as productive as yesterday. Only thing i got done was... the second section minus the cat

1. finishing up that sheet metal cutting yesterday. and its welded

2. I decided to change something on my second piece heres the gap that i wanted to make easier to burn through

3. another

4. another one...

5. fixed. its better now

6. time to bring out the big guns

7. cutting the wastegate side of the pipe

8. all done i have to orient the side that reintroduces to the exhaust system and weld it on before i continue. ( gonna do it at my vocational school where i got trained, They got gas up the ***)

9. back to the downpipe. welded on a little elbow to orient the pipe a bit better

10. flex pipe

11. from underneith

12 swage piece tacked on

13. FU*K, my original plan aint gonna work. See that gap? exhaust leak FTL Gonna see what i can do about it. im thinking of getting YearOne Online Shopping , i have to either expand the lower section or ditch it and go with a new design. Anyone with bright ideas?

14. It holds and looks badass but will definitely not work.


AND i was so ready to start on the 3" the easiest part

back to the drawing board
Attached Thumbnails
DIY Downpipe to tailpipe *56k Warning*-miata-sheetmetal.jpg   DIY Downpipe to tailpipe *56k Warning*-gap-1.jpg   DIY Downpipe to tailpipe *56k Warning*-gap-2.jpg   DIY Downpipe to tailpipe *56k Warning*-gap-3.jpg   DIY Downpipe to tailpipe *56k Warning*-p5030019.jpg  

DIY Downpipe to tailpipe *56k Warning*-p5030024.jpg   DIY Downpipe to tailpipe *56k Warning*-p5030025.jpg   DIY Downpipe to tailpipe *56k Warning*-p5030026.jpg   DIY Downpipe to tailpipe *56k Warning*-p5030027.jpg   DIY Downpipe to tailpipe *56k Warning*-p5030028.jpg  

DIY Downpipe to tailpipe *56k Warning*-p5030029.jpg   DIY Downpipe to tailpipe *56k Warning*-p5030030.jpg   DIY Downpipe to tailpipe *56k Warning*-p5030032.jpg   DIY Downpipe to tailpipe *56k Warning*-p5030033.jpg  
SKMetalworks is offline   Reply With Quote
Old 05-04-2009, 01:30 AM   #11
Senior Member
iTrader: (34)
 
ARTech's Avatar
 
Join Date: Mar 2009
Location: Dallas
Posts: 530
Total Cats: 9
Default

Same here, I hope mine comes out as nice.

Do you know what the bend radius is on the 2.5"? I was thinking of ordering a donut from the chassisshop for clearance if it'll help. Their 2.5 diameter is on a 2.5" radius. 3" on 3" as well. Here's what I'm talking about:



BTW, thats a fine welding machine you have there 8)
ARTech is offline   Reply With Quote
Old 05-04-2009, 01:39 AM   #12
Senior Member
iTrader: (34)
 
ARTech's Avatar
 
Join Date: Mar 2009
Location: Dallas
Posts: 530
Total Cats: 9
Default

try one of these

ARTech is offline   Reply With Quote
Old 05-04-2009, 02:25 AM   #13
I'm Miserable!
iTrader: (2)
 
Join Date: Apr 2008
Location: monroe CT
Posts: 463
Total Cats: 0
Default

i know that downpipe flange anywhere are you going to run a 16g on you car or is that the greddy flange
1990miata1.6 is offline   Reply With Quote
Old 05-04-2009, 02:26 AM   #14
Elite Member
Thread Starter
iTrader: (7)
 
Join Date: Jan 2007
Location: Renton Washington
Posts: 1,742
Total Cats: 3
Default

Quote:
Originally Posted by sprayed View Post

BTW, thats a fine welding machine you have there 8)
For sure. at work we always have atleast 1 TIG machine down; all Lincolns. Our miller wirefeeds have not broken down once.
SKMetalworks is offline   Reply With Quote
Old 05-04-2009, 02:27 AM   #15
Elite Member
Thread Starter
iTrader: (7)
 
Join Date: Jan 2007
Location: Renton Washington
Posts: 1,742
Total Cats: 3
Default

Quote:
Originally Posted by 1990miata1.6 View Post
i know that downpipe flange anywhere are you going to run a 16g on you car
its a greddy td04 15c
SKMetalworks is offline   Reply With Quote
Old 05-04-2009, 02:36 AM   #16
I'm Miserable!
iTrader: (2)
 
Join Date: Apr 2008
Location: monroe CT
Posts: 463
Total Cats: 0
Default

nice it looks good i was going to make a downpipe for my new turbo and manifold setup but i found one of those obx downpipe so im just going to make that one work with the jgs manifold and evo 3 16g i got
1990miata1.6 is offline   Reply With Quote
Old 05-04-2009, 01:09 PM   #17
Junior Member
iTrader: (1)
 
Join Date: Jul 2008
Location: The Netherlands
Posts: 104
Total Cats: 0
Default

What kind of elbows did you use for the first part from the turbo?
Did I see it right is where: 2x 90 degrees and 1x 45 degrees? or is it 3x 90 degrees.

I'm curiosly because it make my life easier when I know what kind of elbows to order

Last edited by martijn; 05-04-2009 at 03:48 PM.
martijn is offline   Reply With Quote
Old 05-04-2009, 04:45 PM   #18
I EAT CUM
iTrader: (6)
 
Join Date: Sep 2008
Location: Redneck, Texas
Posts: 1,218
Total Cats: -1
Default

lookin good
Turbo_4 is offline   Reply With Quote
Old 05-05-2009, 01:44 AM   #19
Elite Member
Thread Starter
iTrader: (7)
 
Join Date: Jan 2007
Location: Renton Washington
Posts: 1,742
Total Cats: 3
Default

Quote:
Originally Posted by martijn View Post
What kind of elbows did you use for the first part from the turbo?
Did I see it right is where: 2x 90 degrees and 1x 45 degrees? or is it 3x 90 degrees.

I'm curiosly because it make my life easier when I know what kind of elbows to order
3 90's but all of them were cut shorter due to space constraints.

Today i got a sweet new toy!!!! and its a solution to my connection issue. I introduce the first time Mr. Lathe =)

heres a link to youtube of it actually running

YouTube - My first lathe run


1. practicing on a scrap piece ( its actually running right now although its hard to tell )

2. There he is

3. Goes on like butta

4. look at that fitup

5. Another pic

For any of you curious as to how much it cost me. It was 275 with bunch of bits and gears. The opprotunity presented itself when a coworker wanted to sell it. While just yesterday i encountered the fat *** gap. I figured it will pay for itself over time
Attached Thumbnails
DIY Downpipe to tailpipe *56k Warning*-p5040023.jpg   DIY Downpipe to tailpipe *56k Warning*-p5040024.jpg   DIY Downpipe to tailpipe *56k Warning*-p5040027.jpg   DIY Downpipe to tailpipe *56k Warning*-p5040028.jpg   DIY Downpipe to tailpipe *56k Warning*-p5040029.jpg  

SKMetalworks is offline   Reply With Quote
Old 05-05-2009, 12:19 PM   #20
Junior Member
iTrader: (1)
 
Join Date: Jul 2008
Location: The Netherlands
Posts: 104
Total Cats: 0
Default

Thx! for the info. I'll go order some stuff.
martijn is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 57 07-19-2017 05:11 PM
My solution for Oiltemp and Oilpressure input into Megasuirt (MS3) Zaphod MEGAsquirt 41 01-24-2016 01:25 PM
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
1996 Turbo Build Goldwar DIY Turbo Discussion 2 09-29-2015 10:20 AM


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 01:10 PM.