DIY Turbo Discussion greddy on a 1.8? homebrew kit?

Wastegate vacuum source

Thread Tools
 
Search this Thread
 
Old 02-06-2007, 12:25 AM
  #1  
Senior Member
Thread Starter
iTrader: (10)
 
ApexOnYou's Avatar
 
Join Date: Feb 2007
Location: South Eastern Wisconsin
Posts: 1,274
Total Cats: 0
Default Wastegate vacuum source

Im thinking about putting a fitting on my compressor housing for my external wastegate, so it would be like the fitting on a internally gated turbo.. Does this seem like a good idea? I havent seen that many people do it.
ApexOnYou is offline  
Old 02-06-2007, 12:37 AM
  #2  
Elite Member
iTrader: (13)
 
cjernigan's Avatar
 
Join Date: Oct 2006
Location: Atlanta, GA
Posts: 8,091
Total Cats: 7
Default

Mine is done like that and it works great. Shortest signal line possible seems to be the best route for most.
cjernigan is offline  
Old 02-06-2007, 12:42 AM
  #3  
Senior Member
Thread Starter
iTrader: (10)
 
ApexOnYou's Avatar
 
Join Date: Feb 2007
Location: South Eastern Wisconsin
Posts: 1,274
Total Cats: 0
Default

I figure closest to the outlet?
ApexOnYou is offline  
Old 02-06-2007, 01:50 AM
  #4  
Elite Member
iTrader: (5)
 
akaryrye's Avatar
 
Join Date: Jul 2006
Location: Central California
Posts: 2,543
Total Cats: 4
Default

so is the signal source supposed to be from between turbo and throttle body and not from the manifold? if thats the case i need to reconfigure my setup. Now that i think about it, it would make much more sense seeing that boost wants to push it open and when i tee off of the manifold i get vacuum and not boost when the throttle is closed.
akaryrye is offline  
Old 02-06-2007, 01:50 AM
  #5  
Former Vendor
iTrader: (8)
 
TheBandit's Avatar
 
Join Date: Mar 2005
Location: Broken Arrow,Ok
Posts: 1,185
Total Cats: 57
Default

Definately use the comp. housing. It is the best and closest source for the wastegate signal. If you want you can even run stainless braid with AN ends and make it look baller status.
-Michael-
TheBandit is offline  
Old 02-06-2007, 08:47 AM
  #6  
Elite Member
iTrader: (3)
 
Arkmage's Avatar
 
Join Date: May 2006
Location: Houston, TX
Posts: 2,895
Total Cats: 0
Default

Originally Posted by akaryrye
so is the signal source supposed to be from between turbo and throttle body and not from the manifold? if thats the case i need to reconfigure my setup. Now that i think about it, it would make much more sense seeing that boost wants to push it open and when i tee off of the manifold i get vacuum and not boost when the throttle is closed.
If you are seeing boost with the throttle closed then you need to fix your BOV.
Arkmage is offline  
Old 02-06-2007, 09:08 AM
  #7  
Junior Member
iTrader: (1)
 
PAT!'s Avatar
 
Join Date: Sep 2006
Posts: 464
Total Cats: 0
Default

If you pull the pressure reference off of the comp housing you will see a slight drop in boost pressure but it should be more consistent and (usually) a better curve.
PAT! is offline  
Old 02-06-2007, 09:25 AM
  #8  
Senior Member
 
bripab007's Avatar
 
Join Date: Dec 2004
Posts: 1,450
Total Cats: -1
Default

I have the best of both worlds. I run the MAP sensor that feeds my EBC off the intake manifold, and the solenoid that is controlled by the EBC is mounted right next to the compressor/wastegate can.
bripab007 is offline  
Old 02-06-2007, 01:17 PM
  #9  
Senior Member
Thread Starter
iTrader: (10)
 
ApexOnYou's Avatar
 
Join Date: Feb 2007
Location: South Eastern Wisconsin
Posts: 1,274
Total Cats: 0
Default

Hm.. Compressor housing it is.
ApexOnYou is offline  
Old 02-06-2007, 02:34 PM
  #10  
Boost Czar
iTrader: (62)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,493
Total Cats: 4,080
Default

Originally Posted by Brian
I have the best of both worlds. I run the MAP sensor that feeds my EBC off the intake manifold, and the solenoid that is controlled by the EBC is mounted right next to the compressor/wastegate can.

how cool! I was doing the same
Braineack is offline  
Old 02-06-2007, 02:49 PM
  #11  
Elite Member
iTrader: (13)
 
cjernigan's Avatar
 
Join Date: Oct 2006
Location: Atlanta, GA
Posts: 8,091
Total Cats: 7
Default

The tullos has a Vac line going directly to it that connects to my manifold so it reads pressure there, then my solenoid is connected at the compressor and WG on the otherside as well. Same setup i guess, just no external MAP sensor.
cjernigan is offline  
Old 02-06-2007, 02:56 PM
  #12  
Elite Member
iTrader: (5)
 
akaryrye's Avatar
 
Join Date: Jul 2006
Location: Central California
Posts: 2,543
Total Cats: 4
Default

nevermind, i confused my bov signal with my wastegate signal lol i guess im still pretty big noob (not to be confused with a big boob)
akaryrye is offline  
Old 02-06-2007, 05:39 PM
  #13  
Senior Member
 
VRTSid's Avatar
 
Join Date: Mar 2005
Posts: 531
Total Cats: 0
Default

I have my bov t'd from my wastegate line on the compressor housing, thats ok right?
VRTSid is offline  
Old 02-06-2007, 05:42 PM
  #14  
Former Vendor
iTrader: (8)
 
TheBandit's Avatar
 
Join Date: Mar 2005
Location: Broken Arrow,Ok
Posts: 1,185
Total Cats: 57
Default

I dont think that is ok. I believe the BOV needs to see vacuum and boost, and since its pre TB it won't see the vacuum.
-Michael-
TheBandit is offline  
Old 02-07-2007, 09:03 AM
  #15  
Junior Member
iTrader: (1)
 
PAT!'s Avatar
 
Join Date: Sep 2006
Posts: 464
Total Cats: 0
Default

TheBandit is right.
Don't share the valves reference with a boost controller either, you can end up with a minor leak when the controller starts to screw around with the boost signal.
PAT! is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
elesjuan
Build Threads
9
11-14-2018 12:18 PM
Corky Bell
Prefabbed Turbo Kits
18
11-22-2016 09:01 PM
Rudes333
Miata parts for sale/trade
17
11-05-2015 01:16 PM
itsMikey
MSPNP
3
09-28-2015 06:40 AM



Quick Reply: Wastegate vacuum source



All times are GMT -4. The time now is 06:08 PM.