Advertisement
If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Home Who's Online Today's Posts HP Calculator CompD Gift Shop Mark Forums Read
Go Back   Competition Diesel.Com - Bringing The BEST Together > The Starting Line > Competition Vehicle Build Tech > Custom Fabrication
Register Members List Timeslips EFI Live Library Invite Your Friends FAQ Calendar Mark Forums Read

Closed Thread
 
Thread Tools
Old 07-19-2018, 08:32 AM   #1
79powerwagon
 
79powerwagon's Avatar

Name: 79powerwagon
Title: Too Much Time
Status: Not Here
Join Date: Jul 2017
Location: MN
Member`s Gallery
Posts: 328
Tips for fabricating charge piping

Im going to be changing the intercooler setup in my 79 and was wondering if anyone had some tips for fabricating charge piping from mild steel. Using a Small miller mig. Have a couple sets of 2nd gen piping to work with.

Now ive done exhaust systems and rigged up some charge piping but it wasnt necassarily pretty. Id like this set to be presentable.

I will likely be making a few pie cuts. Is there a better way to join these pieces than just butting them up? Better to use a 3” od piece to slip inside piping? Man up and buy some mandrel bent stuff?
__________________
1979 Dodge Warlock W150 Ppump 12v/518
 
Old 07-19-2018, 08:41 AM   #2
turbo2387
 
turbo2387's Avatar

Name: turbo2387
Title: Nipple Fluffer
Status: Not Here
Join Date: Jun 2011
Location: Indiana
Member`s Gallery
Posts: 665
man up and buy some mandrel bent pieces. pie cuts are extremely hard to make look presentable for the average Joe in his garage. vrs buying $100 worth of perfects bends and simply cutting straight and welding seams.
 
Old 07-19-2018, 08:59 AM   #3
CorneliusRox
 
CorneliusRox's Avatar

Name: CorneliusRox
Title: Seasoned Rookie
Status: Not Here
Join Date: Dec 2012
Location: Detroit, MI
Member`s Gallery
Posts: 4,154
John Schirado over at GTS just did a post on pie cuts.
https://www.facebook.com/GranbyTruck...07563195941556

He makes them look pretty damn sexy.
__________________
Corey - BSME
'21 Tesla Model 3 Perf
'22 DMax AT4 2500
 
Old 07-19-2018, 09:06 AM   #4
zfaylor
 
zfaylor's Avatar

Name: zfaylor
Title: Comp Diesel Sponsor
Status: Not Here
Join Date: Nov 2010
Location: P-TOWN!, Indiana
Member`s Gallery
Posts: 5,024
With a mig pie cuts tend to look like chit. Not to mention you are opening yourself up for sugaring the inside and getting slag into your intake ten fold when you create such a large amount of butt joints to weld.
__________________
2015 half ton heavy chevy
81 Fairmont LS project
Many yard ornament projects...

North American Turbo
 
Old 07-19-2018, 09:38 AM   #5
Hurley
 
Hurley's Avatar

Name: Hurley
Title: BLAKLUNG
Status: Not Here
Join Date: Apr 2008
Location: Statesville, NC
Member`s Gallery
Posts: 3,698
go no more course than 80 grit flap wheels; prep, prep, and when you think you've prepped, do it again. I like the 3" roloc version on a right angle air grinder/tool/whatever. I like flappers because they have a softer feel and are easier to control when sanding tubes.

make sure your cuts are square, and the tubes match each other.

use 0.024" wire, and if your machine has auto-set, use it. if not, test your settings on scrap pieces. much better to take some time to prep some scrap and test the welder than to have to scrap a full-sized piece that you've already fit up (and probably don't have extra pieces to duplicate)
__________________
THIS
IS
COMPD.

95 2500 RCSB 2wd back-halfed and 4-linked
5x14/7mm +100cc/4k/11-blade billet 63/68/.91 T4
539/989

03 RCLB 4x4, SSR
 
Old 07-19-2018, 09:47 AM   #6
DDually
 
DDually's Avatar

Name: DDually
Title: Still spooling..
Status: Not Here
Join Date: Nov 2009
Member`s Gallery
Posts: 2,095
Buy a couple full donuts and you'll be able to make all the bends you need.
__________________
1995 Cummins with almost no matching paint, 2 dents

2001 VW TDI South bend, tune, nozzys, custom stuff that's rusting, one custom thing that's not rusting
 
Old 07-19-2018, 10:03 AM   #7
Highwayman
 
Highwayman's Avatar

Name: Highwayman
Title: bored.
Status: Not Here
Join Date: Oct 2014
Location: Wacko
Member`s Gallery
Posts: 2,087
I will never mig another set of pie cuts.
Spent forever getting a perfect fit up, only to have them look like dog chit in the end.
Tig if you insist on using pie cuts, but mandrel bends come out cheaper if you value your time.
__________________
97 Dodge 2500 RCLB (scrapped)
1973 F250 crew (soon to receive new power train)
COMPD:
Quote:
Originally Posted by rcfreak24 View Post
Lolzzzzzz fakin haters
 
Old 07-19-2018, 10:38 AM   #8
79powerwagon
 
79powerwagon's Avatar

Name: 79powerwagon
Title: Too Much Time
Status: Not Here
Join Date: Jul 2017
Location: MN
Member`s Gallery
Posts: 328
Thanks all.

Will definately try some smaller wire also.
__________________
1979 Dodge Warlock W150 Ppump 12v/518
 
Old 07-19-2018, 02:52 PM   #9
prostreeter600
 
prostreeter600's Avatar

Name: prostreeter600
Title: Diesel Enthusiast
Status: Not Here
Join Date: Sep 2015
Member`s Gallery
Posts: 129
After you think your done look inside to make sure you don’t have mig wire hanging in there that can come loose and trash your engine, or turbo etc
__________________
06 GMC Sierra RC SB . Full built motor, Full Billet Trans
 
Old 07-19-2018, 05:21 PM   #10
RacinDuallie
 
RacinDuallie's Avatar

Name: RacinDuallie
Title: Black Sheep Racing
Status: Not Here
Join Date: Apr 2006
Location: Supporting Northeast Diesel Racing
Member`s Gallery
Posts: 17,369
For the love of God, get some mandrel bends and go from there.
__________________
 
Old 07-19-2018, 08:08 PM   #11
79powerwagon
 
79powerwagon's Avatar

Name: 79powerwagon
Title: Too Much Time
Status: Not Here
Join Date: Jul 2017
Location: MN
Member`s Gallery
Posts: 328
Quote:
Originally Posted by RacinDuallie View Post
For the love of God, get some mandrel bends and go from there.
Allergic to pie?
Attached Images
File Type: jpg 82E4A6C6-002A-41B9-9E6B-77910F3988EA.jpg (258.8 KB, 0 views)
__________________
1979 Dodge Warlock W150 Ppump 12v/518
 
Old 07-19-2018, 08:16 PM   #12
jasonc

Name: jasonc
Title: Too Much Time
Status: Not Here
Join Date: Nov 2009
Member`s Gallery
Posts: 4,396
As long as it doesn't leak, and no slag in the pipe, who cares. Engine don't care
 
Old 07-19-2018, 08:19 PM   #13
jasonc

Name: jasonc
Title: Too Much Time
Status: Not Here
Join Date: Nov 2009
Member`s Gallery
Posts: 4,396
Quote:
Originally Posted by 79powerwagon View Post
Allergic to pie?
If that was clean and painted, it looks as good or better than a few strong running pro street trucks I've seen. They ain't worried about show quality.
 
Old 07-19-2018, 08:22 PM   #14
79powerwagon
 
79powerwagon's Avatar

Name: 79powerwagon
Title: Too Much Time
Status: Not Here
Join Date: Jul 2017
Location: MN
Member`s Gallery
Posts: 328
I will get some mandrel bent once im ready to do compounds

Atleast got the cooler in.
Attached Images
File Type: jpg ACB1FA8E-4F39-4847-9535-698DACCEC2A1.jpg (346.9 KB, 0 views)
__________________
1979 Dodge Warlock W150 Ppump 12v/518
 
Old 07-20-2018, 12:35 AM   #15
Tate
 
Tate's Avatar

Name: Tate
Title: What?
Status: Not Here
Join Date: Nov 2007
Location: Airdrie, Alberta
Member`s Gallery
Posts: 3,419
If you're open to buying new tools (and really, who isn't?), a belt sander is a dream for doing pipe fit up as you can make sure each joint is flat. Mandrels are nice assuming you don't need real tight radius bends. Pie cuts for the win if thats the case.

Do short stitches and move decently quick with a mig. Always sucks to lay a nice bead just to have it droop and blow a hole at the end.
__________________
'98 3500 2wd, 24v, 5 spd, p-pumped
'98 2500 4wd, 12v, 6 spd, VP'd
'02 VW Jetta, 5 spd.

My p-pump conversion pics
 
Closed Thread

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

Forum Jump


All times are GMT -5. The time now is 09:30 AM.

 


Powered by vBulletin
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2006 - 2024, CompetitionDiesel.com
all information found on this site is property of www.competitiondiesel.com