Want to build a new turbo manifold. - 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 01-18-2010, 09:43 PM   #1
Senior Member
Thread Starter
iTrader: (2)
 
dc2696's Avatar
 
Join Date: May 2005
Location: Edmonton Ab, Canada
Posts: 1,176
Total Cats: 13
Default Want to build a new turbo manifold.

So I've been running the SS custom log mani for a few years now and I think its time to upgrade to something that flows alittle better (need a manifold with a t3 flange anyway for the Holset)

I want to build it myself as I can weld it myself and I like having things other people do not.(That plus I'm broke as hell and can't afford to pay someone to weld it lol)

After looking around I've found all the pieces I need for a decent price, now I just need to decide on what style I should go with.

I'm looking at doing something like this Name:  sst_srmani_1.jpg
Views: 346
Size:  73.2 KB

16 pieces of SS 304 16gauge 90deg bends, a foot or two of straight, a merge collector and some flanges.

Or should I go with a bottom mount like absurdflow with the shorter runners, or make a mini ramhorn like ETD does, so many options.

Plan is to run an external wastegate and 3" downpipe aswell.

So who has opinions or some advice.

btw this will be the first time building one
dc2696 is offline   Reply With Quote
Old 01-18-2010, 10:26 PM   #2
Junior Member
iTrader: (-1)
 
Join Date: Apr 2008
Location: Southern California
Posts: 168
Total Cats: 0
Default

10 gauge... not 16.
wherestheboost is offline   Reply With Quote
Old 01-18-2010, 10:30 PM   #3
Elite Member
iTrader: (9)
 
TurboTim's Avatar
 
Join Date: Jun 2006
Location: Chesterfield, NJ
Posts: 6,483
Total Cats: 248
Default

If you have a 1.8 and need a head flange, let me know. I have 3/8 thick in mild and 304 stainless.
TurboTim is offline   Reply With Quote
Old 01-18-2010, 10:38 PM   #4
Senior Member
Thread Starter
iTrader: (2)
 
dc2696's Avatar
 
Join Date: May 2005
Location: Edmonton Ab, Canada
Posts: 1,176
Total Cats: 13
Default

Quote:
Originally Posted by wherestheboost View Post
10 gauge... not 16.
Wtf, I'm not building a rollcage here

This is actually something I keep running into, some say 304 SS some say 316SS, then there is the .065" 16 gauge or .109" or sch 10....

Tim you wanna chime in on this one?

And yes I will be needing a new head flange in SS, pm price please.

-Dean
dc2696 is offline   Reply With Quote
Old 01-18-2010, 10:41 PM   #5
Elite Member
iTrader: (8)
 
Join Date: Aug 2007
Location: Bellingham, Wa
Posts: 2,732
Total Cats: 3
Default

I'm not sure why you'd even consider anything less than schedule 10 for a manifold. My manifold is schedule 10 and I wish I had gone schedule 40 for piece of mind.
wayne_curr is offline   Reply With Quote
Old 01-18-2010, 10:47 PM   #6
Senior Member
Thread Starter
iTrader: (2)
 
dc2696's Avatar
 
Join Date: May 2005
Location: Edmonton Ab, Canada
Posts: 1,176
Total Cats: 13
Default

Quote:
Originally Posted by wayne_curr View Post
I'm not sure why you'd even consider anything less than schedule 10 for a manifold. My manifold is schedule 10 and I wish I had gone schedule 40 for piece of mind.
Man sch 40 (.145") is pretty thick, not to mention heavy, you really think it's necessary?

I thought sch 10 (.109") would be plenty.
dc2696 is offline   Reply With Quote
Old 01-18-2010, 11:00 PM   #7
Elite Member
iTrader: (8)
 
Join Date: Aug 2007
Location: Bellingham, Wa
Posts: 2,732
Total Cats: 3
Default

Quote:
Originally Posted by dc2696 View Post
Man sch 40 (.145") is pretty thick, not to mention heavy, you really think it's necessary?

I thought sch 10 (.109") would be plenty.
Perhaps not "necessary". You may be right on the weight aspect. My schedule 10 manifold is really light compared to the cast iron piece I took off.
wayne_curr is offline   Reply With Quote
Old 01-18-2010, 11:03 PM   #8
Elite Member
iTrader: (9)
 
TurboTim's Avatar
 
Join Date: Jun 2006
Location: Chesterfield, NJ
Posts: 6,483
Total Cats: 248
Default

Make it out of sch. 10 and find out if it's strong enough. I do not know. Most manifolds out there from *legit builders are sch. 10 I think.

I make mine out of sch. 40.

*by legit I mean people who build these for a living. I don't mean to offend anyone.
TurboTim is offline   Reply With Quote
Old 01-18-2010, 11:23 PM   #9
Senior Member
iTrader: (1)
 
Join Date: Sep 2007
Location: Trenton, NJ
Posts: 1,125
Total Cats: 0
Default

Tim, What schedule is my manifold?
ArtieParty is offline   Reply With Quote
Old 01-18-2010, 11:51 PM   #10
Elite Member
iTrader: (9)
 
TurboTim's Avatar
 
Join Date: Jun 2006
Location: Chesterfield, NJ
Posts: 6,483
Total Cats: 248
Default

Quote:
Originally Posted by ArtieParty View Post
Tim, What schedule is my manifold?
Quote:
Originally Posted by TurboTim View Post
I make mine out of sch. 40.
Except for yours, which was made out of my old metro exhaust (only the choicest sections). It's a good thing you got it ceramic coated.
TurboTim is offline   Reply With Quote
Old 01-19-2010, 02:08 AM   #11
Junior Member
iTrader: (-1)
 
Join Date: Apr 2008
Location: Southern California
Posts: 168
Total Cats: 0
Default

Quote:
Originally Posted by dc2696 View Post
Wtf, I'm not building a rollcage here

This is actually something I keep running into, some say 304 SS some say 316SS, then there is the .065" 16 gauge or .109" or sch 10....

Tim you wanna chime in on this one?

And yes I will be needing a new head flange in SS, pm price please.

-Dean
I was thinking the exact same thing when I was pondering about making a manifold. I was ready to get 16ga 1.5" bends... and then I saw all the builds having schedule 10.

Full Race ONLY sells schedule 40 and 80 elbows... and I thought 40 was thick enough.

It's not like an exhaust... this piece is constantly going through heat cycles... the expansion...contraction...continuing over and over makes everything prone to cracking.........so go thick.
wherestheboost is offline   Reply With Quote
Old 01-19-2010, 09:08 AM   #12
Elite Member
iTrader: (9)
 
TurboTim's Avatar
 
Join Date: Jun 2006
Location: Chesterfield, NJ
Posts: 6,483
Total Cats: 248
Default

Quote:
Originally Posted by dc2696 View Post
And yes I will be needing a new head flange in SS, pm price please.

-Dean
Oops I just saw this part. 1.8, right? I'll reply soon.
TurboTim is offline   Reply With Quote
Old 01-19-2010, 10:32 AM   #13
Senior Member
iTrader: (5)
 
Join Date: Jan 2008
Location: Central, TX / Bay area, CA
Posts: 1,272
Total Cats: 3
Default

Use sch 10, what Holset are you going to run? This is my HY35 on the mani I just built [IMG][/IMG]
Gotpsi? is offline   Reply With Quote
Old 01-19-2010, 10:43 AM   #14
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

Sch. 40 is the way. Avoid Chinagates too, TiAL is the way.
hustler is offline   Reply With Quote
Old 01-19-2010, 10:47 AM   #15
Senior Member
iTrader: (5)
 
Join Date: Jan 2008
Location: Central, TX / Bay area, CA
Posts: 1,272
Total Cats: 3
Default

He said he is on a budget I dont think he is looking to spend more on a waste gate than a turbo, everything including turbo, down pipe, manifold, waste gate, are filter, bolts, gaskets, flanges and all I did for around $200 and its running now, reliably so far I will hit the track on Feb 12th and reality will speak for its self one way or another.
Gotpsi? is offline   Reply With Quote
Old 01-19-2010, 11:05 AM   #16
Senior Member
iTrader: (34)
 
ARTech's Avatar
 
Join Date: Mar 2009
Location: Dallas
Posts: 530
Total Cats: 9
Default

There's 12 90 degree elbows and 2 45 degree in a ramhorn. You can cut one 90 in half to make the 45s so 13 elbows total (14 you're going to use another one for the WG)

Full race doesn't use sch80. That is extremely overkill. That'd probably weigh over 100lbs.

Don't use 316ss over 304ss, there's no advantage in this application. The superior SS alloy would be 321SS, but it will cost more. You can use 16ga (.065") if you brace the turbo/wg.
ARTech is offline   Reply With Quote
Old 01-19-2010, 11:09 AM   #17
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

Quote:
Originally Posted by Gotpsi? View Post
He said he is on a budget I dont think he is looking to spend more on a waste gate than a turbo, everything including turbo, down pipe, manifold, waste gate, are filter, bolts, gaskets, flanges and all I did for around $200 and its running now, reliably so far I will hit the track on Feb 12th and reality will speak for its self one way or another.
It will be interesting to see if the chinaturbo and chinagate make it home alive. I hope you make it, of course.
hustler is offline   Reply With Quote
Old 01-19-2010, 11:13 AM   #18
Senior Member
iTrader: (5)
 
Join Date: Jan 2008
Location: Central, TX / Bay area, CA
Posts: 1,272
Total Cats: 3
Default

I dont have a china turbo, its a Holset. But yes it is a china gate. I also never expect to leave the track with a car that is in tact, I always plan for failure that way Im never disappointed.
Gotpsi? is offline   Reply With Quote
Old 01-19-2010, 11:22 AM   #19
Senior Member
iTrader: (5)
 
Join Date: Jan 2008
Location: Central, TX / Bay area, CA
Posts: 1,272
Total Cats: 3
Default

One more thing to consider is that Holsets weigh about 500lbs so make sure your mani is strong, remember it was made for a truck not a small car.
Gotpsi? is offline   Reply With Quote
Old 01-21-2010, 11:06 AM   #20
Senior Member
Thread Starter
iTrader: (2)
 
dc2696's Avatar
 
Join Date: May 2005
Location: Edmonton Ab, Canada
Posts: 1,176
Total Cats: 13
Default

I'm running the hy35

I won't be running an eBay wastegate, not worth the risk.

I'll def be using atleast sch10 piping.

Gotpsi: how is the hy and how much boost are you running.
dc2696 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Another Cast Manifold Corky Bell Prefabbed Turbo Kits 18 11-22-2016 10:01 PM
LucaCarMods's Boosted Dutch Miata Build! LucaCarMods Build Threads 11 02-14-2016 07:13 AM
Bad head gasket or ? shooterschmidty Engine Performance 8 09-30-2015 11:28 PM
3rd Time's a Charm...hopefully. zephyrusaurai Meet and Greet 2 09-28-2015 11:59 PM
K&N Intake Filter nbdooey Miata parts for sale/trade 0 09-28-2015 09:46 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 10:25 AM.