Race Breather Setup - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Race Prep Miata race-only chat.
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 03-03-2012, 04:19 PM   #1
Junior Member
Thread Starter
iTrader: (-1)
 
Join Date: Jun 2010
Posts: 218
Total Cats: 5
Default Race Breather Setup

what breather setup should be run on a turbo race setup. races are 20 mins long so i don't think there will be a need to return oil to the sump. should a pcv still be used to evacuate or a simply vent to atmosphere via a catch can? or something else?

Thanks
mr2daj is offline   Reply With Quote
Old 03-03-2012, 04:41 PM   #2
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

I killed the PCV, I run a -10 line from the turbo-side of the valve cover to the small Jeg's can with steel wool stuffed in the top. I have an insanely low amount of blow-by and I accumulate about 2oz of water/fuel in the can after 2-hours of track time...and I'm over-estimating.
Attached Thumbnails
Race Breather Setup-381539_10100551935264340_23911356_50599238_1988807741_n.jpg  
hustler is offline   Reply With Quote
Old 03-03-2012, 04:52 PM   #3
Junior Member
Thread Starter
iTrader: (-1)
 
Join Date: Jun 2010
Posts: 218
Total Cats: 5
Default

that's how i have it at the min. just wasn't sure that was enough. guess i am just over thinking it.
mr2daj is offline   Reply With Quote
Old 03-03-2012, 05:36 PM   #4
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,372
Total Cats: 1,334
Default

Depends entirely on the power level, but at some point you will either need a quality ($$) air-oil separator with a gravity drain and a quality vacuum source, or a separator+vacuum pump setup ($$$), or a dry sump ($$$$$).
Savington is offline   Reply With Quote
Old 03-03-2012, 06:02 PM   #5
Junior Member
Thread Starter
iTrader: (-1)
 
Join Date: Jun 2010
Posts: 218
Total Cats: 5
Default

power level is around the 300whp level. FM bottom end, fettled head, GT2871. nothing crazy. seems to have very little blow by.

what about running pcv with a separator between the pcv and the inlet manifold and a separate catch can on the exhaust side for when under boost?

Last edited by mr2daj; 03-03-2012 at 06:24 PM.
mr2daj is offline   Reply With Quote
Old 03-07-2012, 12:23 AM   #6
Supporting Vendor
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 5,326
Total Cats: 1,348
Default

Quote:
Originally Posted by Savington View Post
Depends entirely on the power level, but at some point you will either need a quality ($$) air-oil separator with a gravity drain and a quality vacuum source, or a separator+vacuum pump setup ($$$), or a dry sump ($$$$$).
We're going to separator/vacuum pump on all our engines. We'll have a prototype system in few weeks. If it's something we can produce at a reasonable cost, we'll either add it to our site or give you the drawings and buy them from you
emilio700 is offline   Reply With Quote
Old 03-07-2012, 11:03 AM   #7
Elite Member
iTrader: (2)
 
Join Date: Jan 2007
Location: Los Angeles, CA
Posts: 8,782
Total Cats: 119
Default

Quote:
Originally Posted by Savington View Post
Depends entirely on the power level, but at some point you will either need a quality ($$) air-oil separator with a gravity drain and a quality vacuum source, or a separator+vacuum pump setup ($$$), or a dry sump ($$$$$).
Vacuum pump FTW.

If I could do over, yet again, I would do a vac pump. Or a dry sump.
Faeflora is offline   Reply With Quote
Old 03-07-2012, 03:22 PM   #8
Junior Member
Thread Starter
iTrader: (-1)
 
Join Date: Jun 2010
Posts: 218
Total Cats: 5
Default

are there any decent 12v vacuum pumps available that would suit the purpose rather than something belt driven? seems to be plenty available but will any of them be any good for this?
mr2daj is offline   Reply With Quote
Old 03-07-2012, 04:00 PM   #9
Elite Member
iTrader: (5)
 
Join Date: Dec 2010
Location: Raleigh, NC
Posts: 1,970
Total Cats: 49
Default

I think you can buy diesel vacuum pumps from summitracing. Would that do the job?
Seefo is offline   Reply With Quote
Old 03-07-2012, 04:13 PM   #10
Junior Member
Thread Starter
iTrader: (-1)
 
Join Date: Jun 2010
Posts: 218
Total Cats: 5
Default

not sure... has it been tried?
mr2daj is offline   Reply With Quote
Old 03-07-2012, 04:34 PM   #11
Elite Member
iTrader: (5)
 
Join Date: Dec 2010
Location: Raleigh, NC
Posts: 1,970
Total Cats: 49
Default

no, not exactly, but its a vacuum pump. They use them for brake boosters usually, I think. So its the same idea! I thought about it, but I am NA and I am not exactly racing here, so I figured it was overkill.
Seefo is offline   Reply With Quote
Old 03-07-2012, 04:36 PM   #12
Junior Member
Thread Starter
iTrader: (-1)
 
Join Date: Jun 2010
Posts: 218
Total Cats: 5
Default

cant see why it would not work but there must be a reason they are not used regularly.
mr2daj is offline   Reply With Quote
Old 03-07-2012, 05:10 PM   #13
Elite Member
iTrader: (5)
 
Join Date: Dec 2010
Location: Raleigh, NC
Posts: 1,970
Total Cats: 49
Default

Quote:
Originally Posted by mr2daj View Post
cant see why it would not work but there must be a reason they are not used regularly.
not exactly the biggest issue before. I think up until recently, most FI worries was about reliability and tuning (I can't really say for sure, as I am new to the miata game compared to most around here).

As you can see, Emilio is considering a setup with a vacuum pump at this time. As higher priority concerns have been taken care of, I think people have more time to dot the "I"s and dash the "T"s sort-of-speak.

Anyways, for now I would listen to what Hustler said on this one (or try your hands at a vacuum setup).

OHhh, before I forget. There is some non-miata relevant information on this:
http://www.sr20-forum.com/informatio...d-edition.html

http://forum.diyefi.org/viewtopic.php?f=24&t=357
Seefo is offline   Reply With Quote
Old 03-07-2012, 05:38 PM   #14
Elite Member
iTrader: (10)
 
soviet's Avatar
 
Join Date: Jan 2010
Location: VA
Posts: 3,519
Total Cats: 260
Default

Quote:
Originally Posted by hustler View Post
I killed the PCV, I run a -10 line from the turbo-side of the valve cover to the small Jeg's can with steel wool stuffed in the top. I have an insanely low amount of blow-by and I accumulate about 2oz of water/fuel in the can after 2-hours of track time...and I'm over-estimating.
There's a reason why you run your AN line from that side of the valve cover, right?
soviet is offline   Reply With Quote
Old 03-07-2012, 07:14 PM   #15
Senior Member
iTrader: (6)
 
Join Date: Aug 2009
Location: Charlotte, NC
Posts: 924
Total Cats: 16
Default

Quote:
Originally Posted by soviet View Post
There's a reason why you run your AN line from that side of the valve cover, right?
Yes, it puked oil out of the left hand side in that pic when he tried it.
Gryff is offline   Reply With Quote
Old 03-07-2012, 07:44 PM   #16
Elite Member
iTrader: (5)
 
Join Date: Dec 2010
Location: Raleigh, NC
Posts: 1,970
Total Cats: 49
Default

Quote:
Originally Posted by soviet View Post
There's a reason why you run your AN line from that side of the valve cover, right?
The baffles on the passenger side don't work so well and they end up puking lots of oil.
Seefo is offline   Reply With Quote
Old 03-08-2012, 02:22 AM   #17
Senior Member
 
Join Date: Dec 2007
Posts: 671
Total Cats: 2
Default

Quote:
Originally Posted by emilio700 View Post
We're going to separator/vacuum pump on all our engines. We'll have a prototype system in few weeks. If it's something we can produce at a reasonable cost, we'll either add it to our site or give you the drawings and buy them from you
Belt driven pump or electric?


j_man is offline   Reply With Quote
Old 03-08-2012, 07:44 AM   #18
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

Here's the vacuum pump that I'm using for my set-up:

Obviously I put my name on it.
hustler is offline   Reply With Quote
Old 03-08-2012, 02:13 PM   #19
Supporting Vendor
iTrader: (3)
 
emilio700's Avatar
 
Join Date: May 2005
Posts: 5,326
Total Cats: 1,348
Default

Quote:
Originally Posted by j_man View Post
Belt driven pump or electric?
Belt. Using the OEM damper with a 4 rib and tensioner off the drivers side down low. Other potential variation is a 6 rib with our new billet dampers S/C version.
emilio700 is offline   Reply With Quote
Old 03-08-2012, 02:28 PM   #20
Senior Member
 
Join Date: Dec 2007
Posts: 671
Total Cats: 2
Default

Quote:
Originally Posted by emilio700 View Post
Belt. Using the OEM damper with a 4 rib and tensioner off the drivers side down low. Other potential variation is a 6 rib with our new billet dampers S/C version.
I wonder if belt and pulleys get involved, isn't it better instead of a vacuum one to add a real oil pump and go dry sump? It would be a bit more expensive but at least done right.
j_man 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 59 12-15-2017 09:00 PM
WTB MP62 (Hotside) (NB2) Rick02R WTB 3 01-03-2016 08:18 PM
SimExperience fiberglass race seat in Chicago area chris101 Miata parts for sale/trade 2 10-09-2015 10:08 AM
Leaky Wilwoods mx592 Suspension, Brakes, Drivetrain 1 10-01-2015 01:45 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 07:01 AM.